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提交 68b7e7c4 编写于 作者: D dzzxzz@gmail.com
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fixed the coding style in the components/drivers 

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@2431 bbd45198-f89e-11dd-88c7-29a3b14d5316
上级 87195193
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components/drivers/i2c/i2c-bit-ops.c
浏览文件 @ 68b7e7c4
/*
* File : i2c-bit-ops.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006, RT-Thread Development Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2012-04-25 weety first version
*/
#include <rtdevice.h>
#ifdef RT_I2C_BIT_DEBUG
#define bit_dbg(fmt, ...) rt_kprintf(fmt, ##__VA_ARGS__)
#else
#define bit_dbg(fmt, ...)
#endif
#define SET_SDA(ops, val) ops->set_sda(ops->data, val)
#define SET_SCL(ops, val) ops->set_scl(ops->data, val)
#define GET_SDA(ops) ops->get_sda(ops->data)
#define GET_SCL(ops) ops->get_scl(ops->data)
rt_inline void i2c_delay(struct rt_i2c_bit_ops *ops)
{
ops->udelay((ops->delay_us + 1) >> 1);
}
rt_inline void i2c_delay2(struct rt_i2c_bit_ops *ops)
{
ops->udelay(ops->delay_us);
}
#define SDA_L(ops) SET_SDA(ops, 0)
#define SDA_H(ops) SET_SDA(ops, 1)
#define SCL_L(ops) SET_SCL(ops, 0)
/*
* release scl line, and wait scl line to high.
*/
static rt_err_t SCL_H(struct rt_i2c_bit_ops *ops)
{
rt_tick_t start;
SET_SCL(ops, 1);
if (!ops->get_scl)
goto done;
start = rt_tick_get();
while (!GET_SCL(ops))
{
if ((rt_tick_get() - start) > ops->timeout)
return -RT_ETIMEOUT;
rt_thread_delay((ops->timeout + 1) >> 1);
}
#ifdef RT_I2C_BIT_DEBUG
if (rt_tick_get() != start)
{
bit_dbg("wait %ld tick for SCL line to go high\n",
rt_tick_get() - start);
}
#endif
done:
i2c_delay(ops);
return RT_EOK;
}
static void i2c_start(struct rt_i2c_bit_ops *ops)
{
#ifdef RT_I2C_BIT_DEBUG
if (ops->get_scl && !GET_SCL(ops))
{
bit_dbg("I2C bus error, SCL line low\n");
}
if (ops->get_sda && !GET_SDA(ops))
{
bit_dbg("I2C bus error, SDA line low\n");
}
#endif
SDA_L(ops);
i2c_delay(ops);
SCL_L(ops);
}
static void i2c_restart(struct rt_i2c_bit_ops *ops)
{
SDA_H(ops);
SCL_H(ops);
i2c_delay(ops);
SDA_L(ops);
i2c_delay(ops);
SCL_L(ops);
}
static void i2c_stop(struct rt_i2c_bit_ops *ops)
{
SDA_L(ops);
i2c_delay(ops);
SCL_H(ops);
i2c_delay(ops);
SDA_H(ops);
i2c_delay2(ops);
}
rt_inline rt_bool_t i2c_waitack(struct rt_i2c_bit_ops *ops)
{
rt_bool_t ack;
SDA_H(ops);
i2c_delay(ops);
if (SCL_H(ops) < 0)
{
bit_dbg("wait ack timeout\n");
return -RT_ETIMEOUT;
}
ack = !GET_SDA(ops); /* ACK : SDA pin is pulled low */
bit_dbg("%s\n", ack ? "ACK" : "NACK");
SCL_L(ops);
return ack;
}
static rt_int32_t i2c_writeb(struct rt_i2c_bus_device *bus, rt_uint8_t data)
{
rt_int32_t i;
rt_uint8_t bit;
struct rt_i2c_bit_ops *ops = bus->priv;
for (i = 7; i >= 0; i--)
{
SCL_L(ops);
bit = (data >> i) & 1;
SET_SDA(ops, bit);
i2c_delay(ops);
if (SCL_H(ops) < 0)
{
bit_dbg("i2c_writeb: 0x%02x, "
"wait scl pin high timeout at bit %d\n",
data, i);
return -RT_ETIMEOUT;
}
}
SCL_L(ops);
i2c_delay(ops);
return i2c_waitack(ops);
}
static rt_int32_t i2c_readb(struct rt_i2c_bus_device *bus)
{
rt_uint8_t i;
rt_uint8_t data = 0;
struct rt_i2c_bit_ops *ops = bus->priv;
SDA_H(ops);
i2c_delay(ops);
for (i = 0; i < 8; i++)
{
data <<= 1;
if (SCL_H(ops) < 0)
{
bit_dbg("i2c_readb: wait scl pin high "
"timeout at bit %d\n", 7 - i);
return -RT_ETIMEOUT;
}
if (GET_SDA(ops))
data |= 1;
SCL_L(ops);
i2c_delay2(ops);
}
return data;
}
static rt_size_t i2c_send_bytes(struct rt_i2c_bus_device *bus, struct rt_i2c_msg *msg)
{
rt_int32_t ret;
rt_size_t bytes = 0;
const rt_uint8_t *ptr = msg->buf;
rt_int32_t count = msg->len;
rt_uint16_t ignore_nack = msg->flags & RT_I2C_IGNORE_NACK;
while (count > 0)
{
ret = i2c_writeb(bus, *ptr);
if ((ret > 0) || (ignore_nack && (ret == 0)))
{
count--;
ptr++;
bytes++;
}
else if (ret == 0)
{
i2c_dbg("send bytes: NACK.\n");
return 0;
}
else
{
i2c_dbg("send bytes: error %d\n", ret);
return ret;
}
}
return bytes;
}
static rt_err_t i2c_send_ack_or_nack(struct rt_i2c_bus_device *bus, int ack)
{
struct rt_i2c_bit_ops *ops = bus->priv;
if (ack)
SET_SDA(ops, 0);
i2c_delay(ops);
if (SCL_H(ops) < 0)
{
bit_dbg("ACK or NACK timeout\n");
return -RT_ETIMEOUT;
}
SCL_L(ops);
return RT_EOK;
}
static rt_size_t i2c_recv_bytes(struct rt_i2c_bus_device *bus, struct rt_i2c_msg *msg)
{
rt_int32_t val;
rt_int32_t bytes = 0; /* actual bytes */
rt_uint8_t *ptr = msg->buf;
rt_int32_t count = msg->len;
const rt_uint32_t flags = msg->flags;
while (count > 0)
{
val = i2c_readb(bus);
if (val >= 0)
{
*ptr = val;
bytes++;
}
else
{
break;
}
ptr++;
count--;
bit_dbg("recieve bytes: 0x%02x, %s\n",
val, (flags & RT_I2C_NO_READ_ACK) ?
"(No ACK/NACK)" : (count ? "ACK" : "NACK"));
if (!(flags & RT_I2C_NO_READ_ACK))
{
val = i2c_send_ack_or_nack(bus, count);
if (val < 0)
return val;
}
}
return bytes;
}
static rt_int32_t i2c_send_address(struct rt_i2c_bus_device *bus,
rt_uint8_t addr, rt_int32_t retries)
{
struct rt_i2c_bit_ops *ops = bus->priv;
rt_int32_t i;
rt_err_t ret = 0;
for (i = 0; i <= retries; i++)
{
ret = i2c_writeb(bus, addr);
if (ret == 1 || i == retries)
break;
bit_dbg("send stop condition\n");
i2c_stop(ops);
i2c_delay2(ops);
bit_dbg("send start condition\n");
i2c_start(ops);
}
return ret;
}
static rt_err_t i2c_bit_send_address(struct rt_i2c_bus_device *bus, struct rt_i2c_msg *msg)
{
rt_uint16_t flags = msg->flags;
rt_uint16_t ignore_nack = msg->flags & RT_I2C_IGNORE_NACK;
struct rt_i2c_bit_ops *ops = bus->priv;
rt_uint8_t addr1, addr2;
rt_int32_t retries;
rt_err_t ret;
retries = ignore_nack ? 0 : bus->retries;
if (flags & RT_I2C_ADDR_10BIT)
{
addr1 = 0xf0 | ((msg->addr >> 7) & 0x06);
addr2 = msg->addr & 0xff;
bit_dbg("addr1: %d, addr2: %d\n", addr1, addr2);
ret = i2c_send_address(bus, addr1, retries);
if ((ret != 1) && !ignore_nack)
{
bit_dbg("NACK: sending first addr\n");
return -RT_EIO;
}
ret = i2c_writeb(bus, addr2);
if ((ret != 1) && !ignore_nack)
{
bit_dbg("NACK: sending second addr\n");
return -RT_EIO;
}
if (flags & RT_I2C_RD)
{
bit_dbg("send repeated start condition\n");
i2c_restart(ops);
addr1 |= 0x01;
ret = i2c_send_address(bus, addr1, retries);
if ((ret != 1) && !ignore_nack)
{
bit_dbg("NACK: sending repeated addr\n");
return -RT_EIO;
}
}
}
else
{
/* 7-bit addr */
addr1 = msg->addr << 1;
if (flags & RT_I2C_RD)
addr1 |= 1;
ret = i2c_send_address(bus, addr1, retries);
if ((ret != 1) && !ignore_nack)
return -RT_EIO;
}
return RT_EOK;
}
static rt_size_t i2c_bit_xfer(struct rt_i2c_bus_device *bus,
struct rt_i2c_msg msgs[], rt_uint32_t num)
{
struct rt_i2c_msg *msg;
struct rt_i2c_bit_ops *ops = bus->priv;
rt_int32_t i, ret;
rt_uint16_t ignore_nack;
bit_dbg("send start condition\n");
i2c_start(ops);
for (i = 0; i < num; i++)
{
msg = &msgs[i];
ignore_nack = msg->flags & RT_I2C_IGNORE_NACK;
if (!(msg->flags & RT_I2C_NO_START))
{
if (i)
{
i2c_restart(ops);
}
ret = i2c_bit_send_address(bus, msg);
if ((ret != RT_EOK) && !ignore_nack)
{
bit_dbg("receive NACK from device addr 0x%02x msg %d\n",
msgs[i].addr, i);
goto out;
}
}
if (msg->flags & RT_I2C_RD)
{
ret = i2c_recv_bytes(bus, msg);
if (ret >= 1)
bit_dbg("read %d byte%s\n",
ret, ret == 1 ? "" : "s");
if (ret < msg->len)
{
if (ret >= 0)
ret = -RT_EIO;
goto out;
}
}
else
{
ret = i2c_send_bytes(bus, msg);
if (ret >= 1)
bit_dbg("write %d byte%s\n",
ret, ret == 1 ? "" : "s");
if (ret < msg->len)
{
if (ret >= 0)
ret = -RT_ERROR;
goto out;
}
}
}
ret = i;
out:
bit_dbg("send stop condition\n");
i2c_stop(ops);
return ret;
}
static const struct rt_i2c_bus_device_ops i2c_bit_bus_ops =
{
i2c_bit_xfer,
RT_NULL,
RT_NULL
};
rt_err_t rt_i2c_bit_add_bus(struct rt_i2c_bus_device *bus, const char *bus_name)
{
struct rt_i2c_bit_ops *bit_ops = bus->priv;
RT_ASSERT(bit_ops != RT_NULL);
bus->ops = &i2c_bit_bus_ops;
return rt_i2c_bus_device_register(bus, bus_name);
}
/*
* File : i2c-bit-ops.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006 - 2012, RT-Thread Development Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2012-04-25 weety first version
*/
#include <rtdevice.h>
#ifdef RT_I2C_BIT_DEBUG
#define bit_dbg(fmt, ...) rt_kprintf(fmt, ##__VA_ARGS__)
#else
#define bit_dbg(fmt, ...)
#endif
#define SET_SDA(ops, val) ops->set_sda(ops->data, val)
#define SET_SCL(ops, val) ops->set_scl(ops->data, val)
#define GET_SDA(ops) ops->get_sda(ops->data)
#define GET_SCL(ops) ops->get_scl(ops->data)
rt_inline void i2c_delay(struct rt_i2c_bit_ops *ops)
{
ops->udelay((ops->delay_us + 1) >> 1);
}
rt_inline void i2c_delay2(struct rt_i2c_bit_ops *ops)
{
ops->udelay(ops->delay_us);
}
#define SDA_L(ops) SET_SDA(ops, 0)
#define SDA_H(ops) SET_SDA(ops, 1)
#define SCL_L(ops) SET_SCL(ops, 0)
/**
* release scl line, and wait scl line to high.
*/
static rt_err_t SCL_H(struct rt_i2c_bit_ops *ops)
{
rt_tick_t start;
SET_SCL(ops, 1);
if (!ops->get_scl)
goto done;
start = rt_tick_get();
while (!GET_SCL(ops))
{
if ((rt_tick_get() - start) > ops->timeout)
return -RT_ETIMEOUT;
rt_thread_delay((ops->timeout + 1) >> 1);
}
#ifdef RT_I2C_BIT_DEBUG
if (rt_tick_get() != start)
{
bit_dbg("wait %ld tick for SCL line to go high\n",
rt_tick_get() - start);
}
#endif
done:
i2c_delay(ops);
return RT_EOK;
}
static void i2c_start(struct rt_i2c_bit_ops *ops)
{
#ifdef RT_I2C_BIT_DEBUG
if (ops->get_scl && !GET_SCL(ops))
{
bit_dbg("I2C bus error, SCL line low\n");
}
if (ops->get_sda && !GET_SDA(ops))
{
bit_dbg("I2C bus error, SDA line low\n");
}
#endif
SDA_L(ops);
i2c_delay(ops);
SCL_L(ops);
}
static void i2c_restart(struct rt_i2c_bit_ops *ops)
{
SDA_H(ops);
SCL_H(ops);
i2c_delay(ops);
SDA_L(ops);
i2c_delay(ops);
SCL_L(ops);
}
static void i2c_stop(struct rt_i2c_bit_ops *ops)
{
SDA_L(ops);
i2c_delay(ops);
SCL_H(ops);
i2c_delay(ops);
SDA_H(ops);
i2c_delay2(ops);
}
rt_inline rt_bool_t i2c_waitack(struct rt_i2c_bit_ops *ops)
{
rt_bool_t ack;
SDA_H(ops);
i2c_delay(ops);
if (SCL_H(ops) < 0)
{
bit_dbg("wait ack timeout\n");
return -RT_ETIMEOUT;
}
ack = !GET_SDA(ops); /* ACK : SDA pin is pulled low */
bit_dbg("%s\n", ack ? "ACK" : "NACK");
SCL_L(ops);
return ack;
}
static rt_int32_t i2c_writeb(struct rt_i2c_bus_device *bus, rt_uint8_t data)
{
rt_int32_t i;
rt_uint8_t bit;
struct rt_i2c_bit_ops *ops = bus->priv;
for (i = 7; i >= 0; i--)
{
SCL_L(ops);
bit = (data >> i) & 1;
SET_SDA(ops, bit);
i2c_delay(ops);
if (SCL_H(ops) < 0)
{
bit_dbg("i2c_writeb: 0x%02x, "
"wait scl pin high timeout at bit %d\n",
data, i);
return -RT_ETIMEOUT;
}
}
SCL_L(ops);
i2c_delay(ops);
return i2c_waitack(ops);
}
static rt_int32_t i2c_readb(struct rt_i2c_bus_device *bus)
{
rt_uint8_t i;
rt_uint8_t data = 0;
struct rt_i2c_bit_ops *ops = bus->priv;
SDA_H(ops);
i2c_delay(ops);
for (i = 0; i < 8; i++)
{
data <<= 1;
if (SCL_H(ops) < 0)
{
bit_dbg("i2c_readb: wait scl pin high "
"timeout at bit %d\n", 7 - i);
return -RT_ETIMEOUT;
}
if (GET_SDA(ops))
data |= 1;
SCL_L(ops);
i2c_delay2(ops);
}
return data;
}
static rt_size_t i2c_send_bytes(struct rt_i2c_bus_device *bus,
struct rt_i2c_msg *msg)
{
rt_int32_t ret;
rt_size_t bytes = 0;
const rt_uint8_t *ptr = msg->buf;
rt_int32_t count = msg->len;
rt_uint16_t ignore_nack = msg->flags & RT_I2C_IGNORE_NACK;
while (count > 0)
{
ret = i2c_writeb(bus, *ptr);
if ((ret > 0) || (ignore_nack && (ret == 0)))
{
count --;
ptr ++;
bytes ++;
}
else if (ret == 0)
{
i2c_dbg("send bytes: NACK.\n");
return 0;
}
else
{
i2c_dbg("send bytes: error %d\n", ret);
return ret;
}
}
return bytes;
}
static rt_err_t i2c_send_ack_or_nack(struct rt_i2c_bus_device *bus, int ack)
{
struct rt_i2c_bit_ops *ops = bus->priv;
if (ack)
SET_SDA(ops, 0);
i2c_delay(ops);
if (SCL_H(ops) < 0)
{
bit_dbg("ACK or NACK timeout\n");
return -RT_ETIMEOUT;
}
SCL_L(ops);
return RT_EOK;
}
static rt_size_t i2c_recv_bytes(struct rt_i2c_bus_device *bus,
struct rt_i2c_msg *msg)
{
rt_int32_t val;
rt_int32_t bytes = 0; /* actual bytes */
rt_uint8_t *ptr = msg->buf;
rt_int32_t count = msg->len;
const rt_uint32_t flags = msg->flags;
while (count > 0)
{
val = i2c_readb(bus);
if (val >= 0)
{
*ptr = val;
bytes ++;
}
else
{
break;
}
ptr ++;
count --;
bit_dbg("recieve bytes: 0x%02x, %s\n",
val, (flags & RT_I2C_NO_READ_ACK) ?
"(No ACK/NACK)" : (count ? "ACK" : "NACK"));
if (!(flags & RT_I2C_NO_READ_ACK))
{
val = i2c_send_ack_or_nack(bus, count);
if (val < 0)
return val;
}
}
return bytes;
}
static rt_int32_t i2c_send_address(struct rt_i2c_bus_device *bus,
rt_uint8_t addr,
rt_int32_t retries)
{
struct rt_i2c_bit_ops *ops = bus->priv;
rt_int32_t i;
rt_err_t ret = 0;
for (i = 0; i <= retries; i++)
{
ret = i2c_writeb(bus, addr);
if (ret == 1 || i == retries)
break;
bit_dbg("send stop condition\n");
i2c_stop(ops);
i2c_delay2(ops);
bit_dbg("send start condition\n");
i2c_start(ops);
}
return ret;
}
static rt_err_t i2c_bit_send_address(struct rt_i2c_bus_device *bus,
struct rt_i2c_msg *msg)
{
rt_uint16_t flags = msg->flags;
rt_uint16_t ignore_nack = msg->flags & RT_I2C_IGNORE_NACK;
struct rt_i2c_bit_ops *ops = bus->priv;
rt_uint8_t addr1, addr2;
rt_int32_t retries;
rt_err_t ret;
retries = ignore_nack ? 0 : bus->retries;
if (flags & RT_I2C_ADDR_10BIT)
{
addr1 = 0xf0 | ((msg->addr >> 7) & 0x06);
addr2 = msg->addr & 0xff;
bit_dbg("addr1: %d, addr2: %d\n", addr1, addr2);
ret = i2c_send_address(bus, addr1, retries);
if ((ret != 1) && !ignore_nack)
{
bit_dbg("NACK: sending first addr\n");
return -RT_EIO;
}
ret = i2c_writeb(bus, addr2);
if ((ret != 1) && !ignore_nack)
{
bit_dbg("NACK: sending second addr\n");
return -RT_EIO;
}
if (flags & RT_I2C_RD)
{
bit_dbg("send repeated start condition\n");
i2c_restart(ops);
addr1 |= 0x01;
ret = i2c_send_address(bus, addr1, retries);
if ((ret != 1) && !ignore_nack)
{
bit_dbg("NACK: sending repeated addr\n");
return -RT_EIO;
}
}
}
else
{
/* 7-bit addr */
addr1 = msg->addr << 1;
if (flags & RT_I2C_RD)
addr1 |= 1;
ret = i2c_send_address(bus, addr1, retries);
if ((ret != 1) && !ignore_nack)
return -RT_EIO;
}
return RT_EOK;
}
static rt_size_t i2c_bit_xfer(struct rt_i2c_bus_device *bus,
struct rt_i2c_msg msgs[],
rt_uint32_t num)
{
struct rt_i2c_msg *msg;
struct rt_i2c_bit_ops *ops = bus->priv;
rt_int32_t i, ret;
rt_uint16_t ignore_nack;
bit_dbg("send start condition\n");
i2c_start(ops);
for (i = 0; i < num; i++)
{
msg = &msgs[i];
ignore_nack = msg->flags & RT_I2C_IGNORE_NACK;
if (!(msg->flags & RT_I2C_NO_START))
{
if (i)
{
i2c_restart(ops);
}
ret = i2c_bit_send_address(bus, msg);
if ((ret != RT_EOK) && !ignore_nack)
{
bit_dbg("receive NACK from device addr 0x%02x msg %d\n",
msgs[i].addr, i);
goto out;
}
}
if (msg->flags & RT_I2C_RD)
{
ret = i2c_recv_bytes(bus, msg);
if (ret >= 1)
bit_dbg("read %d byte%s\n", ret, ret == 1 ? "" : "s");
if (ret < msg->len)
{
if (ret >= 0)
ret = -RT_EIO;
goto out;
}
}
else
{
ret = i2c_send_bytes(bus, msg);
if (ret >= 1)
bit_dbg("write %d byte%s\n", ret, ret == 1 ? "" : "s");
if (ret < msg->len)
{
if (ret >= 0)
ret = -RT_ERROR;
goto out;
}
}
}
ret = i;
out:
bit_dbg("send stop condition\n");
i2c_stop(ops);
return ret;
}
static const struct rt_i2c_bus_device_ops i2c_bit_bus_ops =
{
i2c_bit_xfer,
RT_NULL,
RT_NULL
};
rt_err_t rt_i2c_bit_add_bus(struct rt_i2c_bus_device *bus,
const char *bus_name)
{
struct rt_i2c_bit_ops *bit_ops = bus->priv;
RT_ASSERT(bit_ops != RT_NULL);
bus->ops = &i2c_bit_bus_ops;
return rt_i2c_bus_device_register(bus, bus_name);
}
components/drivers/i2c/i2c_core.c
浏览文件 @ 68b7e7c4
/*
* File : i2c_core.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006, RT-Thread Development Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2012-04-25 weety first version
*/
#include <rtdevice.h>
static struct rt_mutex i2c_core_lock;
rt_err_t rt_i2c_bus_device_register(struct rt_i2c_bus_device *bus,
const char *bus_name)
{
rt_err_t res = RT_EOK;
rt_mutex_init(&bus->lock, "i2c_bus_lock", RT_IPC_FLAG_FIFO);
rt_mutex_take(&i2c_core_lock, RT_WAITING_FOREVER);
if (bus->timeout == 0)
bus->timeout = RT_TICK_PER_SECOND;
res = rt_i2c_bus_device_device_init(bus, bus_name);
i2c_dbg("I2C bus [%s] registered\n", bus_name);
rt_mutex_release(&i2c_core_lock);
return res;
}
struct rt_i2c_bus_device* rt_i2c_bus_device_find(const char *bus_name)
{
struct rt_i2c_bus_device *bus;
rt_device_t dev = rt_device_find(bus_name);
if (dev == RT_NULL || dev->type != RT_Device_Class_I2CBUS)
{
i2c_dbg("I2C bus %s not exist\n", bus_name);
return RT_NULL;
}
bus = (struct rt_i2c_bus_device *)dev->user_data;
return bus;
}
rt_size_t rt_i2c_transfer(struct rt_i2c_bus_device *bus,
struct rt_i2c_msg msgs[],
rt_uint32_t num)
{
rt_size_t ret;
if (bus->ops->master_xfer)
{
#ifdef RT_I2C_DEBUG
for (ret = 0; ret < num; ret++)
{
i2c_dbg("msgs[%d] %c, addr=0x%02x, len=%d%s\n", ret,
(msgs[ret].flags & RT_I2C_RD) ? 'R' : 'W',
msgs[ret].addr, msgs[ret].len);
}
#endif
rt_mutex_take(&bus->lock, RT_WAITING_FOREVER);
ret = bus->ops->master_xfer(bus, msgs, num);
rt_mutex_release(&bus->lock);
return ret;
}
else
{
i2c_dbg("I2C bus operation not supported\n");
return 0;
}
}
rt_size_t rt_i2c_master_send(struct rt_i2c_bus_device *bus,
rt_uint16_t addr,
rt_uint16_t flags,
const rt_uint8_t *buf,
rt_uint32_t count)
{
rt_size_t ret;
struct rt_i2c_msg msg;
msg.addr = addr;
msg.flags = flags & RT_I2C_ADDR_10BIT;
msg.len = count;
msg.buf = (rt_uint8_t *)buf;
ret = rt_i2c_transfer(bus, &msg, 1);
return (ret > 0) ? count : ret;
}
rt_size_t rt_i2c_master_recv(struct rt_i2c_bus_device *bus,
rt_uint16_t addr,
rt_uint16_t flags,
rt_uint8_t *buf,
rt_uint32_t count)
{
rt_size_t ret;
struct rt_i2c_msg msg;
RT_ASSERT(bus != RT_NULL);
msg.addr = addr;
msg.flags = flags & RT_I2C_ADDR_10BIT;
msg.flags |= RT_I2C_RD;
msg.len = count;
msg.buf = buf;
ret = rt_i2c_transfer(bus, &msg, 1);
return (ret > 0) ? count : ret;
}
rt_err_t rt_i2c_core_init(void)
{
return rt_mutex_init (&i2c_core_lock, "i2c_core_lock", RT_IPC_FLAG_FIFO);
}
/*
* File : i2c_core.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006 - 2012, RT-Thread Development Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2012-04-25 weety first version
*/
#include <rtdevice.h>
static struct rt_mutex i2c_core_lock;
rt_err_t rt_i2c_bus_device_register(struct rt_i2c_bus_device *bus,
const char *bus_name)
{
rt_err_t res = RT_EOK;
rt_mutex_init(&bus->lock, "i2c_bus_lock", RT_IPC_FLAG_FIFO);
rt_mutex_take(&i2c_core_lock, RT_WAITING_FOREVER);
if (bus->timeout == 0)
bus->timeout = RT_TICK_PER_SECOND;
res = rt_i2c_bus_device_device_init(bus, bus_name);
i2c_dbg("I2C bus [%s] registered\n", bus_name);
rt_mutex_release(&i2c_core_lock);
return res;
}
struct rt_i2c_bus_device *rt_i2c_bus_device_find(const char *bus_name)
{
struct rt_i2c_bus_device *bus;
rt_device_t dev = rt_device_find(bus_name);
if (dev == RT_NULL || dev->type != RT_Device_Class_I2CBUS)
{
i2c_dbg("I2C bus %s not exist\n", bus_name);
return RT_NULL;
}
bus = (struct rt_i2c_bus_device *)dev->user_data;
return bus;
}
rt_size_t rt_i2c_transfer(struct rt_i2c_bus_device *bus,
struct rt_i2c_msg msgs[],
rt_uint32_t num)
{
rt_size_t ret;
if (bus->ops->master_xfer)
{
#ifdef RT_I2C_DEBUG
for (ret = 0; ret < num; ret++)
{
i2c_dbg("msgs[%d] %c, addr=0x%02x, len=%d%s\n", ret,
(msgs[ret].flags & RT_I2C_RD) ? 'R' : 'W',
msgs[ret].addr, msgs[ret].len);
}
#endif
rt_mutex_take(&bus->lock, RT_WAITING_FOREVER);
ret = bus->ops->master_xfer(bus, msgs, num);
rt_mutex_release(&bus->lock);
return ret;
}
else
{
i2c_dbg("I2C bus operation not supported\n");
return 0;
}
}
rt_size_t rt_i2c_master_send(struct rt_i2c_bus_device *bus,
rt_uint16_t addr,
rt_uint16_t flags,
const rt_uint8_t *buf,
rt_uint32_t count)
{
rt_size_t ret;
struct rt_i2c_msg msg;
msg.addr = addr;
msg.flags = flags & RT_I2C_ADDR_10BIT;
msg.len = count;
msg.buf = (rt_uint8_t *)buf;
ret = rt_i2c_transfer(bus, &msg, 1);
return (ret > 0) ? count : ret;
}
rt_size_t rt_i2c_master_recv(struct rt_i2c_bus_device *bus,
rt_uint16_t addr,
rt_uint16_t flags,
rt_uint8_t *buf,
rt_uint32_t count)
{
rt_size_t ret;
struct rt_i2c_msg msg;
RT_ASSERT(bus != RT_NULL);
msg.addr = addr;
msg.flags = flags & RT_I2C_ADDR_10BIT;
msg.flags |= RT_I2C_RD;
msg.len = count;
msg.buf = buf;
ret = rt_i2c_transfer(bus, &msg, 1);
return (ret > 0) ? count : ret;
}
rt_err_t rt_i2c_core_init(void)
{
return rt_mutex_init(&i2c_core_lock, "i2c_core_lock", RT_IPC_FLAG_FIFO);
}
components/drivers/i2c/i2c_dev.c
浏览文件 @ 68b7e7c4
#include <rtdevice.h>
static rt_err_t i2c_bus_device_init(rt_device_t dev)
{
struct rt_i2c_bus_device* bus = (struct rt_i2c_bus_device *)dev->user_data;
RT_ASSERT(bus != RT_NULL);
return RT_EOK;
}
static rt_size_t i2c_bus_device_read (rt_device_t dev,
rt_off_t pos,
void *buffer,
rt_size_t count)
{
rt_uint16_t addr;
rt_uint16_t flags;
struct rt_i2c_bus_device* bus = (struct rt_i2c_bus_device *)dev->user_data;
RT_ASSERT(bus != RT_NULL);
RT_ASSERT(buffer != RT_NULL);
i2c_dbg("I2C bus dev [%s] reading %u bytes.\n", dev->parent.name, count);
addr = pos & 0xffff;
flags = (pos >> 16) & 0xffff;
return rt_i2c_master_recv(bus, addr, flags, buffer, count);
}
static rt_size_t i2c_bus_device_write (rt_device_t dev,
rt_off_t pos,
const void *buffer,
rt_size_t count)
{
rt_uint16_t addr;
rt_uint16_t flags;
struct rt_i2c_bus_device* bus = (struct rt_i2c_bus_device *)dev->user_data;
RT_ASSERT(bus != RT_NULL);
RT_ASSERT(buffer != RT_NULL);
i2c_dbg("I2C bus dev writing %u bytes.\n", dev->parent.name, count);
addr = pos & 0xffff;
flags = (pos >> 16) & 0xffff;
return rt_i2c_master_send(bus, addr, flags, buffer, count);
}
static rt_err_t i2c_bus_device_control(rt_device_t dev,
rt_uint8_t cmd,
void *args)
{
rt_err_t ret;
struct rt_i2c_priv_data *priv_data;
struct rt_i2c_bus_device* bus = (struct rt_i2c_bus_device *)dev->user_data;
RT_ASSERT(bus != RT_NULL);
switch (cmd)
{
case RT_I2C_DEV_CTRL_10BIT: /* set 10-bit addr mode */
bus->flags |= RT_I2C_ADDR_10BIT;
break;
case RT_I2C_DEV_CTRL_ADDR:
bus->addr = *(rt_uint16_t *)args;
break;
case RT_I2C_DEV_CTRL_TIMEOUT:
bus->timeout = *(rt_uint32_t *)args;
break;
case RT_I2C_DEV_CTRL_RW:
priv_data = (struct rt_i2c_priv_data *)args;
ret = rt_i2c_transfer(bus, priv_data->msgs, priv_data->number);
if (ret < 0)
{
return -RT_EIO;
}
break;
default:
break;
}
return RT_EOK;
}
rt_err_t rt_i2c_bus_device_device_init(struct rt_i2c_bus_device* bus,
const char* name)
{
struct rt_device *device;
RT_ASSERT(bus != RT_NULL);
device = &bus->parent;
device->user_data = bus;
/* set device type */
device->type = RT_Device_Class_I2CBUS;
/* initialize device interface */
device->init = i2c_bus_device_init;
device->open = RT_NULL;
device->close = RT_NULL;
device->read = i2c_bus_device_read;
device->write = i2c_bus_device_write;
device->control = i2c_bus_device_control;
/* register to device manager */
rt_device_register(device, name, RT_DEVICE_FLAG_RDWR);
return RT_EOK;
}
/*
* File : i2c_dev.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006 - 2012, RT-Thread Development Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2012-04-25 weety first version
*/
#include <rtdevice.h>
static rt_err_t i2c_bus_device_init(rt_device_t dev)
{
struct rt_i2c_bus_device *bus = (struct rt_i2c_bus_device *)dev->user_data;
RT_ASSERT(bus != RT_NULL);
return RT_EOK;
}
static rt_size_t i2c_bus_device_read(rt_device_t dev,
rt_off_t pos,
void *buffer,
rt_size_t count)
{
rt_uint16_t addr;
rt_uint16_t flags;
struct rt_i2c_bus_device *bus = (struct rt_i2c_bus_device *)dev->user_data;
RT_ASSERT(bus != RT_NULL);
RT_ASSERT(buffer != RT_NULL);
i2c_dbg("I2C bus dev [%s] reading %u bytes.\n", dev->parent.name, count);
addr = pos & 0xffff;
flags = (pos >> 16) & 0xffff;
return rt_i2c_master_recv(bus, addr, flags, buffer, count);
}
static rt_size_t i2c_bus_device_write(rt_device_t dev,
rt_off_t pos,
const void *buffer,
rt_size_t count)
{
rt_uint16_t addr;
rt_uint16_t flags;
struct rt_i2c_bus_device *bus = (struct rt_i2c_bus_device *)dev->user_data;
RT_ASSERT(bus != RT_NULL);
RT_ASSERT(buffer != RT_NULL);
i2c_dbg("I2C bus dev writing %u bytes.\n", dev->parent.name, count);
addr = pos & 0xffff;
flags = (pos >> 16) & 0xffff;
return rt_i2c_master_send(bus, addr, flags, buffer, count);
}
static rt_err_t i2c_bus_device_control(rt_device_t dev,
rt_uint8_t cmd,
void *args)
{
rt_err_t ret;
struct rt_i2c_priv_data *priv_data;
struct rt_i2c_bus_device *bus = (struct rt_i2c_bus_device *)dev->user_data;
RT_ASSERT(bus != RT_NULL);
switch (cmd)
{
/* set 10-bit addr mode */
case RT_I2C_DEV_CTRL_10BIT:
bus->flags |= RT_I2C_ADDR_10BIT;
break;
case RT_I2C_DEV_CTRL_ADDR:
bus->addr = *(rt_uint16_t *)args;
break;
case RT_I2C_DEV_CTRL_TIMEOUT:
bus->timeout = *(rt_uint32_t *)args;
break;
case RT_I2C_DEV_CTRL_RW:
priv_data = (struct rt_i2c_priv_data *)args;
ret = rt_i2c_transfer(bus, priv_data->msgs, priv_data->number);
if (ret < 0)
{
return -RT_EIO;
}
break;
default:
break;
}
return RT_EOK;
}
rt_err_t rt_i2c_bus_device_device_init(struct rt_i2c_bus_device *bus,
const char *name)
{
struct rt_device *device;
RT_ASSERT(bus != RT_NULL);
device = &bus->parent;
device->user_data = bus;
/* set device type */
device->type = RT_Device_Class_I2CBUS;
/* initialize device interface */
device->init = i2c_bus_device_init;
device->open = RT_NULL;
device->close = RT_NULL;
device->read = i2c_bus_device_read;
device->write = i2c_bus_device_write;
device->control = i2c_bus_device_control;
/* register to device manager */
rt_device_register(device, name, RT_DEVICE_FLAG_RDWR);
return RT_EOK;
}
components/drivers/include/drivers/i2c-bit-ops.h
浏览文件 @ 68b7e7c4
/*
* File : i2c-bit-ops.h
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006, RT-Thread Development Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2012-04-25 weety first version
*/
#ifndef __I2C_BIT_OPS_H__
#define __I2C_BIT_OPS_H__
#ifdef __cplusplus
extern "C" {
#endif
struct rt_i2c_bit_ops
{
void *data; /* private data for lowlevel routines */
void (*set_sda) (void *data, rt_int32_t state);
void (*set_scl) (void *data, rt_int32_t state);
rt_int32_t (*get_sda) (void *data);
rt_int32_t (*get_scl) (void *data);
void (*udelay) (rt_uint32_t us);
rt_uint32_t delay_us; /* scl and sda line delay */
rt_uint32_t timeout; /* in tick */
};
rt_err_t rt_i2c_bit_add_bus(struct rt_i2c_bus_device *bus,
const char *bus_name);
#ifdef __cplusplus
}
#endif
#endif
/*
* File : i2c-bit-ops.h
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006 - 2012, RT-Thread Development Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2012-04-25 weety first version
*/
#ifndef __I2C_BIT_OPS_H__
#define __I2C_BIT_OPS_H__
#ifdef __cplusplus
extern "C" {
#endif
struct rt_i2c_bit_ops
{
void *data; /* private data for lowlevel routines */
void (*set_sda)(void *data, rt_int32_t state);
void (*set_scl)(void *data, rt_int32_t state);
rt_int32_t (*get_sda)(void *data);
rt_int32_t (*get_scl)(void *data);
void (*udelay)(rt_uint32_t us);
rt_uint32_t delay_us; /* scl and sda line delay */
rt_uint32_t timeout; /* in tick */
};
rt_err_t rt_i2c_bit_add_bus(struct rt_i2c_bus_device *bus,
const char *bus_name);
#ifdef __cplusplus
}
#endif
#endif
components/drivers/include/drivers/i2c.h
浏览文件 @ 68b7e7c4
/*
* File : i2c.h
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006, RT-Thread Development Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2012-04-25 weety first version
*/
#ifndef __I2C_H__
#define __I2C_H__
#include <rtthread.h>
#ifdef __cplusplus
extern "C" {
#endif
#define RT_I2C_WR 0x0000
#define RT_I2C_RD (1u << 0)
#define RT_I2C_ADDR_10BIT (1u << 2) /* this is a ten bit chip address */
#define RT_I2C_NO_START (1u << 4)
#define RT_I2C_IGNORE_NACK (1u << 5)
#define RT_I2C_NO_READ_ACK (1u << 6) /* when I2C reading, we do not ACK */
struct rt_i2c_msg
{
rt_uint16_t addr;
rt_uint16_t flags;
rt_uint16_t len;
rt_uint8_t *buf;
};
struct rt_i2c_bus_device;
struct rt_i2c_bus_device_ops
{
rt_size_t (*master_xfer) (struct rt_i2c_bus_device *bus,
struct rt_i2c_msg msgs[],
rt_uint32_t num);
rt_size_t (*slave_xfer) (struct rt_i2c_bus_device *bus,
struct rt_i2c_msg msgs[],
rt_uint32_t num);
rt_err_t (*i2c_bus_control) (struct rt_i2c_bus_device *bus,
rt_uint32_t,
rt_uint32_t);
};
/*for i2c bus driver*/
struct rt_i2c_bus_device
{
struct rt_device parent;
const struct rt_i2c_bus_device_ops *ops;
rt_uint16_t flags;
rt_uint16_t addr;
struct rt_mutex lock;
rt_uint32_t timeout;
rt_uint32_t retries;
void *priv;
};
#ifdef RT_I2C_DEBUG
#define i2c_dbg(fmt, ...) rt_kprintf(fmt, ##__VA_ARGS__)
#else
#define i2c_dbg(fmt, ...)
#endif
rt_err_t rt_i2c_bus_device_register(struct rt_i2c_bus_device *bus,
const char *bus_name);
struct rt_i2c_bus_device* rt_i2c_bus_device_find(const char *bus_name);
rt_size_t rt_i2c_transfer(struct rt_i2c_bus_device *bus,
struct rt_i2c_msg msgs[],
rt_uint32_t num);
rt_size_t rt_i2c_master_send(struct rt_i2c_bus_device *bus,
rt_uint16_t addr,
rt_uint16_t flags,
const rt_uint8_t *buf,
rt_uint32_t count);
rt_size_t rt_i2c_master_recv(struct rt_i2c_bus_device *bus,
rt_uint16_t addr,
rt_uint16_t flags,
rt_uint8_t *buf,
rt_uint32_t count);
rt_err_t rt_i2c_core_init(void);
#ifdef __cplusplus
}
#endif
#endif
/*
* File : i2c.h
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006 - 2012, RT-Thread Development Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2012-04-25 weety first version
*/
#ifndef __I2C_H__
#define __I2C_H__
#include <rtthread.h>
#ifdef __cplusplus
extern "C" {
#endif
#define RT_I2C_WR 0x0000
#define RT_I2C_RD (1u << 0)
#define RT_I2C_ADDR_10BIT (1u << 2) /* this is a ten bit chip address */
#define RT_I2C_NO_START (1u << 4)
#define RT_I2C_IGNORE_NACK (1u << 5)
#define RT_I2C_NO_READ_ACK (1u << 6) /* when I2C reading, we do not ACK */
struct rt_i2c_msg
{
rt_uint16_t addr;
rt_uint16_t flags;
rt_uint16_t len;
rt_uint8_t *buf;
};
struct rt_i2c_bus_device;
struct rt_i2c_bus_device_ops
{
rt_size_t (*master_xfer)(struct rt_i2c_bus_device *bus,
struct rt_i2c_msg msgs[],
rt_uint32_t num);
rt_size_t (*slave_xfer)(struct rt_i2c_bus_device *bus,
struct rt_i2c_msg msgs[],
rt_uint32_t num);
rt_err_t (*i2c_bus_control)(struct rt_i2c_bus_device *bus,
rt_uint32_t,
rt_uint32_t);
};
/*for i2c bus driver*/
struct rt_i2c_bus_device
{
struct rt_device parent;
const struct rt_i2c_bus_device_ops *ops;
rt_uint16_t flags;
rt_uint16_t addr;
struct rt_mutex lock;
rt_uint32_t timeout;
rt_uint32_t retries;
void *priv;
};
#ifdef RT_I2C_DEBUG
#define i2c_dbg(fmt, ...) rt_kprintf(fmt, ##__VA_ARGS__)
#else
#define i2c_dbg(fmt, ...)
#endif
rt_err_t rt_i2c_bus_device_register(struct rt_i2c_bus_device *bus,
const char *bus_name);
struct rt_i2c_bus_device *rt_i2c_bus_device_find(const char *bus_name);
rt_size_t rt_i2c_transfer(struct rt_i2c_bus_device *bus,
struct rt_i2c_msg msgs[],
rt_uint32_t num);
rt_size_t rt_i2c_master_send(struct rt_i2c_bus_device *bus,
rt_uint16_t addr,
rt_uint16_t flags,
const rt_uint8_t *buf,
rt_uint32_t count);
rt_size_t rt_i2c_master_recv(struct rt_i2c_bus_device *bus,
rt_uint16_t addr,
rt_uint16_t flags,
rt_uint8_t *buf,
rt_uint32_t count);
rt_err_t rt_i2c_core_init(void);
#ifdef __cplusplus
}
#endif
#endif
components/drivers/include/drivers/i2c_dev.h
浏览文件 @ 68b7e7c4
#ifndef __I2C_DEV_H__
#define __I2C_DEV_H__
#include <rtthread.h>
#ifdef __cplusplus
extern "C" {
#endif
#define RT_I2C_DEV_CTRL_10BIT 0x20
#define RT_I2C_DEV_CTRL_ADDR 0x21
#define RT_I2C_DEV_CTRL_TIMEOUT 0x22
#define RT_I2C_DEV_CTRL_RW 0x23
struct rt_i2c_priv_data
{
struct rt_i2c_msg *msgs;
rt_size_t number;
};
rt_err_t rt_i2c_bus_device_device_init(struct rt_i2c_bus_device* bus,
const char* name);
#ifdef __cplusplus
}
#endif
#endif
/*
* File : i2c_dev.h
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006 - 2012, RT-Thread Development Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2012-04-25 weety first version
*/
#ifndef __I2C_DEV_H__
#define __I2C_DEV_H__
#include <rtthread.h>
#ifdef __cplusplus
extern "C" {
#endif
#define RT_I2C_DEV_CTRL_10BIT 0x20
#define RT_I2C_DEV_CTRL_ADDR 0x21
#define RT_I2C_DEV_CTRL_TIMEOUT 0x22
#define RT_I2C_DEV_CTRL_RW 0x23
struct rt_i2c_priv_data
{
struct rt_i2c_msg *msgs;
rt_size_t number;
};
rt_err_t rt_i2c_bus_device_device_init(struct rt_i2c_bus_device *bus,
const char *name);
#ifdef __cplusplus
}
#endif
#endif
components/drivers/mtd/mtd_nand.c
浏览文件 @ 68b7e7c4
/*
* File : mtd_core.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006 - 2012, RT-Thread Development Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2011-12-05 Bernard the first version
*/
/*
* COPYRIGHT (C) 2012, Shanghai Real Thread
*/
#include <drivers/mtd_nand.h>
#ifdef RT_USING_MTD_NAND
/*
* RT-Thread Generic Device Interface
*/
static rt_err_t _mtd_init(rt_device_t dev)
{
return RT_EOK;
}
static rt_err_t _mtd_open(rt_device_t dev, rt_uint16_t oflag)
{
return RT_EOK;
}
static rt_err_t _mtd_close(rt_device_t dev)
{
return RT_EOK;
}
static rt_size_t _mtd_read(rt_device_t dev, rt_off_t pos, void *buffer, rt_size_t size)
{
return size;
}
static rt_size_t _mtd_write(rt_device_t dev, rt_off_t pos, const void *buffer, rt_size_t size)
{
return size;
}
static rt_err_t _mtd_control(rt_device_t dev, rt_uint8_t cmd, void *args)
{
return RT_EOK;
}
rt_err_t rt_mtd_nand_register_device(const char* name, struct rt_mtd_nand_device* device)
{
rt_device_t dev;
dev = RT_DEVICE(device);
RT_ASSERT(dev != RT_NULL);
/* set device class and generic device interface */
dev->type = RT_Device_Class_MTD;
dev->init = _mtd_init;
dev->open = _mtd_open;
dev->read = _mtd_read;
dev->write = _mtd_write;
dev->close = _mtd_close;
dev->control = _mtd_control;
dev->rx_indicate = RT_NULL;
dev->tx_complete = RT_NULL;
/* register to RT-Thread device system */
return rt_device_register(dev, name, RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_STANDALONE);
/*
* File : mtd_core.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006 - 2012, RT-Thread Development Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2011-12-05 Bernard the first version
*/
/*
* COPYRIGHT (C) 2012, Shanghai Real Thread
*/
#include <drivers/mtd_nand.h>
#ifdef RT_USING_MTD_NAND
/**
* RT-Thread Generic Device Interface
*/
static rt_err_t _mtd_init(rt_device_t dev)
{
return RT_EOK;
}
#endif
static rt_err_t _mtd_open(rt_device_t dev, rt_uint16_t oflag)
{
return RT_EOK;
}
static rt_err_t _mtd_close(rt_device_t dev)
{
return RT_EOK;
}
static rt_size_t _mtd_read(rt_device_t dev,
rt_off_t pos,
void *buffer,
rt_size_t size)
{
return size;
}
static rt_size_t _mtd_write(rt_device_t dev,
rt_off_t pos,
const void *buffer,
rt_size_t size)
{
return size;
}
static rt_err_t _mtd_control(rt_device_t dev, rt_uint8_t cmd, void *args)
{
return RT_EOK;
}
rt_err_t rt_mtd_nand_register_device(const char *name,
struct rt_mtd_nand_device *device)
{
rt_device_t dev;
dev = RT_DEVICE(device);
RT_ASSERT(dev != RT_NULL);
/* set device class and generic device interface */
dev->type = RT_Device_Class_MTD;
dev->init = _mtd_init;
dev->open = _mtd_open;
dev->read = _mtd_read;
dev->write = _mtd_write;
dev->close = _mtd_close;
dev->control = _mtd_control;
dev->rx_indicate = RT_NULL;
dev->tx_complete = RT_NULL;
/* register to RT-Thread device system */
return rt_device_register(dev, name, RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_STANDALONE);
}
#endif
components/drivers/mtd/mtd_nor.c
浏览文件 @ 68b7e7c4
/*
* File : mtd_nor.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2012, Shanghai Real-Thread Technology Co., Ltd
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2012-5-30 Bernard the first version
*/
#include <drivers/mtd_nor.h>
#ifdef RT_USING_MTD_NOR
/*
* RT-Thread Generic Device Interface
*/
static rt_err_t _mtd_init(rt_device_t dev)
{
return RT_EOK;
}
static rt_err_t _mtd_open(rt_device_t dev, rt_uint16_t oflag)
{
return RT_EOK;
}
static rt_err_t _mtd_close(rt_device_t dev)
{
return RT_EOK;
}
static rt_size_t _mtd_read(rt_device_t dev, rt_off_t pos, void *buffer, rt_size_t size)
{
return size;
}
static rt_size_t _mtd_write(rt_device_t dev, rt_off_t pos, const void *buffer, rt_size_t size)
{
return size;
}
static rt_err_t _mtd_control(rt_device_t dev, rt_uint8_t cmd, void *args)
{
return RT_EOK;
}
rt_err_t rt_mtd_nor_register_device(const char* name, struct rt_mtd_nor_device* device)
{
rt_device_t dev;
dev = RT_DEVICE(device);
RT_ASSERT(dev != RT_NULL);
/* set device class and generic device interface */
dev->type = RT_Device_Class_MTD;
dev->init = _mtd_init;
dev->open = _mtd_open;
dev->read = _mtd_read;
dev->write = _mtd_write;
dev->close = _mtd_close;
dev->control = _mtd_control;
dev->rx_indicate = RT_NULL;
dev->tx_complete = RT_NULL;
/* register to RT-Thread device system */
return rt_device_register(dev, name, RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_STANDALONE);
}
#endif
/*
* File : mtd_nor.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2012, Shanghai Real-Thread Technology Co., Ltd
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2012-5-30 Bernard the first version
*/
#include <drivers/mtd_nor.h>
#ifdef RT_USING_MTD_NOR
/**
* RT-Thread Generic Device Interface
*/
static rt_err_t _mtd_init(rt_device_t dev)
{
return RT_EOK;
}
static rt_err_t _mtd_open(rt_device_t dev, rt_uint16_t oflag)
{
return RT_EOK;
}
static rt_err_t _mtd_close(rt_device_t dev)
{
return RT_EOK;
}
static rt_size_t _mtd_read(rt_device_t dev,
rt_off_t pos,
void *buffer,
rt_size_t size)
{
return size;
}
static rt_size_t _mtd_write(rt_device_t dev,
rt_off_t pos,
const void *buffer,
rt_size_t size)
{
return size;
}
static rt_err_t _mtd_control(rt_device_t dev, rt_uint8_t cmd, void *args)
{
return RT_EOK;
}
rt_err_t rt_mtd_nor_register_device(const char *name,
struct rt_mtd_nor_device *device)
{
rt_device_t dev;
dev = RT_DEVICE(device);
RT_ASSERT(dev != RT_NULL);
/* set device class and generic device interface */
dev->type = RT_Device_Class_MTD;
dev->init = _mtd_init;
dev->open = _mtd_open;
dev->read = _mtd_read;
dev->write = _mtd_write;
dev->close = _mtd_close;
dev->control = _mtd_control;
dev->rx_indicate = RT_NULL;
dev->tx_complete = RT_NULL;
/* register to RT-Thread device system */
return rt_device_register(dev, name, RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_STANDALONE);
}
#endif
components/drivers/rtc/alarm.c
浏览文件 @ 68b7e7c4
/*
* File : alarm.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006 - 2012, RT-Thread Development Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2012-10-27 heyuanjie87 first version.
*/
#include <rtthread.h>
#include <rtdevice.h>
#define RT_RTC_YEARS_MAX 137
#define RT_ALARM_DELAY 2
#define RT_ALARM_STATE_INITED 0x02
#define RT_ALARM_STATE_START 0x01
#define RT_ALARM_STATE_STOP 0x00
#if(defined(RT_USING_RTC) && defined(RT_USING_ALARM))
static struct rt_alarm_container _container;
rt_inline rt_uint32_t alarm_mkdaysec(struct tm *time)
{
rt_uint32_t sec;
sec = time->tm_sec;
sec += time->tm_min * 60;
sec += time->tm_hour * 3600;
return (sec);
}
static rt_err_t alarm_set(struct rt_alarm *alarm)
{
rt_device_t device;
struct rt_rtc_wkalarm wkalarm;
rt_err_t ret;
device = rt_device_find("rtc");
if (device == RT_NULL)
{
return (RT_ERROR);
}
if (alarm->flag & RT_ALARM_STATE_START)
wkalarm.enable = RT_TRUE;
else
wkalarm.enable = RT_FALSE;
wkalarm.tm_sec = alarm->wktime.tm_sec;
wkalarm.tm_min = alarm->wktime.tm_min;
wkalarm.tm_hour = alarm->wktime.tm_hour;
ret = rt_device_control(device, RT_DEVICE_CTRL_RTC_SET_ALARM, &wkalarm);
if ((ret == RT_EOK) && wkalarm.enable)
{
ret = rt_device_control(device, RT_DEVICE_CTRL_RTC_GET_ALARM, &wkalarm);
if (ret == RT_EOK)
{
/*
some RTC device like RX8025,it's alarms precision is 1 minute.
in this case,low level RTC driver should set wkalarm->tm_sec to 0.
*/
alarm->wktime.tm_sec = wkalarm.tm_sec;
alarm->wktime.tm_min = wkalarm.tm_min;
alarm->wktime.tm_hour = wkalarm.tm_hour;
}
}
return (ret);
}
static void alarm_wakeup(struct rt_alarm *alarm, struct tm *now)
{
rt_uint32_t sec_alarm, sec_now;
rt_bool_t wakeup = RT_FALSE;
time_t timestamp;
sec_alarm = alarm_mkdaysec(&alarm->wktime);
sec_now = alarm_mkdaysec(now);
if (alarm->flag & RT_ALARM_STATE_START)
{
switch (alarm->flag & 0xFF00)
{
case RT_ALARM_ONESHOT:
{
sec_alarm = mktime(&alarm->wktime);
sec_now = mktime(now);
if (((sec_now - sec_alarm) <= RT_ALARM_DELAY) && (sec_now >= sec_alarm))
{
/* stop alarm */
alarm->flag &= ~RT_ALARM_STATE_START;
alarm_set(alarm);
wakeup = RT_TRUE;
}
}
break;
case RT_ALARM_DAILY:
{
if (((sec_now - sec_alarm) <= RT_ALARM_DELAY) && (sec_now >= sec_alarm))
wakeup = RT_TRUE;
}
break;
case RT_ALARM_WEEKLY:
{
/* alarm at wday */
sec_alarm += alarm->wktime.tm_wday * 24 * 3600;
sec_now += now->tm_wday * 24 * 3600;
if (((sec_now - sec_alarm) <= RT_ALARM_DELAY) && (sec_now >= sec_alarm))
wakeup = RT_TRUE;
}
break;
case RT_ALARM_MONTHLY:
{
/* monthly someday generate alarm signals */
if (alarm->wktime.tm_mday == now->tm_mday)
{
if ((sec_now - sec_alarm) <= RT_ALARM_DELAY)
wakeup = RT_TRUE;
}
}
break;
case RT_ALARM_YAERLY:
{
if ((alarm->wktime.tm_mday == now->tm_mday) && \
(alarm->wktime.tm_mon == now->tm_mon))
{
if ((sec_now - sec_alarm) <= RT_ALARM_DELAY)
wakeup = RT_TRUE;
}
}
break;
}
if ((wakeup == RT_TRUE) && (alarm->callback != RT_NULL))
{
timestamp = time(RT_NULL);
alarm->callback(alarm, timestamp);
}
}
}
static void alarm_update(rt_uint32_t event)
{
struct rt_alarm *alm_prev = RT_NULL, *alm_next = RT_NULL;
struct rt_alarm *alarm;
rt_int32_t sec_now, sec_alarm, sec_tmp;
rt_int32_t sec_next = 24 * 3600, sec_prev = 0;
time_t timestamp;
struct tm now;
rt_list_t *next;
rt_mutex_take(&_container.mutex, RT_WAITING_FOREVER);
if (!rt_list_isempty(&_container.head))
{
/* get time of now */
timestamp = time(RT_NULL);
localtime_r(&timestamp, &now);
for (next = _container.head.next; next != &_container.head; next = next->next)
{
alarm = rt_list_entry(next, struct rt_alarm, list);
/* check the overtime alarm */
alarm_wakeup(alarm, &now);
}
timestamp = time(RT_NULL);
localtime_r(&timestamp, &now);
sec_now = alarm_mkdaysec(&now);
for (next = _container.head.next; next != &_container.head; next = next->next)
{
alarm = rt_list_entry(next, struct rt_alarm, list);
/* calculate seconds from 00:00:00 */
sec_alarm = alarm_mkdaysec(&alarm->wktime);
if ((alarm->flag & RT_ALARM_STATE_START) && (alarm != _container.current))
{
sec_tmp = sec_alarm - sec_now;
if (sec_tmp > 0)
{
/* find alarm after now(now to 23:59:59) and the most recent */
if (sec_tmp < sec_next)
{
sec_next = sec_tmp;
alm_next = alarm;
}
}
else
{
/* find alarm before now(00:00:00 to now) and furthest from now */
if (sec_tmp < sec_prev)
{
sec_prev = sec_tmp;
alm_prev = alarm;
}
}
}
}
/* enable the alarm after now first */
if (sec_next < 24 * 3600)
{
if (alarm_set(alm_next) == RT_EOK)
_container.current = alm_next;
}
else if (sec_prev < 0)
{
/* enable the alarm before now */
if (alarm_set(alm_prev) == RT_EOK)
_container.current = alm_prev;
}
}
rt_mutex_release(&_container.mutex);
}
static rt_uint32_t days_of_year_month(int tm_year, int tm_mon)
{
rt_uint32_t ret, year;
year = tm_year + 1900;
if (tm_mon == 1)
{
ret = 28 + ((!(year % 4) && (year % 100)) || !(year % 400));
}
else if (((tm_mon <= 6) && (tm_mon % 2 == 0)) || ((tm_mon > 6) && (tm_mon % 2 == 1)))
{
ret = 31;
}
else
{
ret = 30;
}
return (ret);
}
static rt_bool_t is_valid_date(struct tm *date)
{
if ((date->tm_year < 0) || (date->tm_year > RT_RTC_YEARS_MAX))
{
return (RT_FALSE);
}
if ((date->tm_mon < 0) || (date->tm_mon > 11))
{
return (RT_FALSE);
}
if ((date->tm_mday < 1) || \
(date->tm_mday > days_of_year_month(date->tm_year, date->tm_mon)))
{
return (RT_FALSE);
}
return (RT_TRUE);
}
static rt_err_t alarm_setup(rt_alarm_t alarm, struct tm *wktime)
{
rt_err_t ret = RT_ERROR;
time_t timestamp;
struct tm *setup, now;
setup = &alarm->wktime;
*setup = *wktime;
timestamp = time(RT_NULL);
localtime_r(&timestamp, &now);
/* if these are a "don't care" value,we set them to now*/
if ((setup->tm_sec > 59) || (setup->tm_sec < 0))
setup->tm_sec = now.tm_sec;
if ((setup->tm_min > 59) || (setup->tm_min < 0))
setup->tm_min = now.tm_min;
if ((setup->tm_hour > 23) || (setup->tm_hour < 0))
setup->tm_hour = now.tm_hour;
switch (alarm->flag & 0xFF00)
{
case RT_ALARM_DAILY:
{
/* do nothing but needed */
}
break;
case RT_ALARM_ONESHOT:
{
/* if these are "don't care" value we set them to now */
if (setup->tm_year == RT_ALARM_TM_NOW)
setup->tm_year = now.tm_year;
if (setup->tm_mon == RT_ALARM_TM_NOW)
setup->tm_mon = now.tm_mon;
if (setup->tm_mday == RT_ALARM_TM_NOW)
setup->tm_mday = now.tm_mday;
/* make sure the setup is valid */
if (!is_valid_date(setup))
goto _exit;
}
break;
case RT_ALARM_WEEKLY:
{
/* if tm_wday is a "don't care" value we set it to now */
if ((setup->tm_wday < 0) || (setup->tm_wday > 6))
setup->tm_wday = now.tm_wday;
}
break;
case RT_ALARM_MONTHLY:
{
/* if tm_mday is a "don't care" value we set it to now */
if ((setup->tm_mday < 1) || (setup->tm_mday > 31))
setup->tm_mday = now.tm_mday;
}
break;
case RT_ALARM_YAERLY:
{
/* if tm_mon is a "don't care" value we set it to now */
if ((setup->tm_mon < 0) || (setup->tm_mon > 11))
setup->tm_mon = now.tm_mon;
if (setup->tm_mon == 1)
{
/* tm_mon is February */
/* tm_mday should be 1~29.otherwise,it's a "don't care" value */
if ((setup->tm_mday < 1) || (setup->tm_mday > 29))
setup->tm_mday = now.tm_mday;
}
else if (((setup->tm_mon <= 6) && (setup->tm_mon % 2 == 0)) || \
((setup->tm_mon > 6) && (setup->tm_mon % 2 == 1)))
{
/* Jan,Mar,May,Jul,Aug,Oct,Dec */
/* tm_mday should be 1~31.otherwise,it's a "don't care" value */
if ((setup->tm_mday < 1) || (setup->tm_mday > 31))
setup->tm_mday = now.tm_mday;
}
else
{
/* tm_mday should be 1~30.otherwise,it's a "don't care" value */
if ((setup->tm_mday < 1) || (setup->tm_mday > 30))
setup->tm_mday = now.tm_mday;
}
}
break;
default:
{
goto _exit;
}
}
if ((setup->tm_hour == 23) && (setup->tm_min == 59) && (setup->tm_sec == 59))
{
/*
for insurance purposes, we will generate an alarm
signal two seconds ahead of.
*/
setup->tm_sec = 60 - RT_ALARM_DELAY;
}
/* set initialized state */
alarm->flag |= RT_ALARM_STATE_INITED;
ret = RT_EOK;
_exit:
return (ret);
}
/** \brief send a rtc alarm event
*
* \param dev pointer to RTC device(currently unused,you can ignore it)
* \param event RTC event(currently unused)
* \return none
*/
void rt_alarm_update(rt_device_t dev, rt_uint32_t event)
{
rt_event_send(&_container.event, 1);
}
/** \brief modify the alarm setup
*
* \param alarm pointer to alarm
* \param cmd control command
* \param arg argument
*/
rt_err_t rt_alarm_control(rt_alarm_t alarm, rt_uint8_t cmd, void *arg)
{
rt_err_t ret = RT_ERROR;
RT_ASSERT(alarm != RT_NULL);
rt_mutex_take(&_container.mutex, RT_WAITING_FOREVER);
switch (cmd)
{
case RT_ALARM_MODIFY:
{
struct rt_alarm_setup *setup;
RT_ASSERT(arg != RT_NULL);
setup = arg;
rt_alarm_stop(alarm);
alarm->flag = setup->flag & 0xFF00;
alarm->wktime = setup->wktime;
ret = alarm_setup(alarm, &alarm->wktime);
}
break;
}
rt_mutex_release(&_container.mutex);
return (ret);
}
/** \brief start a alarm
*
* \param alarm pointer to alarm
* \return RT_EOK
*/
rt_err_t rt_alarm_start(rt_alarm_t alarm)
{
rt_int32_t sec_now, sec_old, sec_new;
rt_err_t ret = RT_ERROR;
time_t timestamp;
struct tm now;
if (alarm == RT_NULL)
return (ret);
rt_mutex_take(&_container.mutex, RT_WAITING_FOREVER);
if (!(alarm->flag & RT_ALARM_STATE_INITED))
{
if (alarm_setup(alarm, &alarm->wktime) != RT_EOK)
goto _exit;
}
if ((alarm->flag & 0x01) == RT_ALARM_STATE_STOP)
{
timestamp = time(RT_NULL);
localtime_r(&timestamp, &now);
alarm->flag |= RT_ALARM_STATE_START;
/* set alarm */
if (_container.current == RT_NULL)
{
ret = alarm_set(alarm);
}
else
{
sec_now = alarm_mkdaysec(&now);
sec_old = alarm_mkdaysec(&_container.current->wktime);
sec_new = alarm_mkdaysec(&alarm->wktime);
if ((sec_new < sec_old) && (sec_new > sec_now))
{
ret = alarm_set(alarm);
}
else if ((sec_new > sec_now) && (sec_old < sec_now))
{
ret = alarm_set(alarm);
}
else if ((sec_new < sec_old) && (sec_old < sec_now))
{
ret = alarm_set(alarm);
}
else
{
ret = RT_EOK;
goto _exit;
}
}
if (ret == RT_EOK)
{
_container.current = alarm;
}
}
_exit:
rt_mutex_release(&_container.mutex);
return (ret);
}
/** \brief stop a alarm
*
* \param alarm pointer to alarm
* \return RT_EOK
*/
rt_err_t rt_alarm_stop(rt_alarm_t alarm)
{
rt_err_t ret = RT_ERROR;
if (alarm == RT_NULL)
return (ret);
rt_mutex_take(&_container.mutex, RT_WAITING_FOREVER);
if (!(alarm->flag & RT_ALARM_STATE_START))
goto _exit;
/* stop alarm */
alarm->flag &= ~RT_ALARM_STATE_START;
if (_container.current == alarm)
{
ret = alarm_set(alarm);
_container.current = RT_NULL;
}
if (ret == RT_EOK)
alarm_update(0);
_exit:
rt_mutex_release(&_container.mutex);
return (ret);
}
/** \brief delete a alarm
*
* \param alarm pointer to alarm
* \return RT_EOK
*/
rt_err_t rt_alarm_delete(rt_alarm_t alarm)
{
rt_err_t ret = RT_ERROR;
if (alarm == RT_NULL)
return (ret);
rt_mutex_take(&_container.mutex, RT_WAITING_FOREVER);
/* stop the alarm */
alarm->flag &= ~RT_ALARM_STATE_START;
if (_container.current == alarm)
{
ret = alarm_set(alarm);
_container.current = RT_NULL;
/* set new alarm if necessary */
alarm_update(0);
}
rt_list_remove(&alarm->list);
rt_free(alarm);
rt_mutex_release(&_container.mutex);
return (ret);
}
/** \brief create a alarm
*
* \param flag set alarm mode e.g: RT_ALARM_DAILY
* \param setup pointer to setup infomation
*/
rt_alarm_t rt_alarm_create(rt_alarm_callback_t callback, struct rt_alarm_setup *setup)
{
struct rt_alarm *alarm;
if (setup == RT_NULL)
return (RT_NULL);
alarm = rt_malloc(sizeof(struct rt_alarm));
if (alarm == RT_NULL)
return (RT_NULL);
rt_list_init(&alarm->list);
alarm->wktime = setup->wktime;
alarm->flag = setup->flag & 0xFF00;
alarm->callback = callback;
rt_mutex_take(&_container.mutex, RT_WAITING_FOREVER);
rt_list_insert_after(&_container.head, &alarm->list);
rt_mutex_release(&_container.mutex);
return (alarm);
}
/** \brief rtc alarm service thread entry
*
*/
static void rt_alarmsvc_thread_init(void *param)
{
rt_uint32_t recv;
rt_list_init(&_container.head);
rt_event_init(&_container.event, "alarmsvc", RT_IPC_FLAG_FIFO);
rt_mutex_init(&_container.mutex, "alarmsvc", RT_IPC_FLAG_FIFO);
_container.current = RT_NULL;
while (1)
{
if (rt_event_recv(&_container.event, 0xFFFF,
RT_EVENT_FLAG_OR | RT_EVENT_FLAG_CLEAR,
RT_WAITING_FOREVER, &recv) == RT_EOK)
{
alarm_update(recv);
}
}
}
/** \brief initialize alarm service system
*
* \param none
* \return none
*/
void rt_alarm_system_init(void)
{
rt_thread_t tid;
tid = rt_thread_create("alarmsvc",
rt_alarmsvc_thread_init, RT_NULL,
512, 8, 1);
if (tid != RT_NULL)
rt_thread_startup(tid);
}
#endif
/*
* File : alarm.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006 - 2012, RT-Thread Development Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2012-10-27 heyuanjie87 first version.
*/
#include <rtthread.h>
#include <rtdevice.h>
#define RT_RTC_YEARS_MAX 137
#define RT_ALARM_DELAY 2
#define RT_ALARM_STATE_INITED 0x02
#define RT_ALARM_STATE_START 0x01
#define RT_ALARM_STATE_STOP 0x00
#if(defined(RT_USING_RTC) && defined(RT_USING_ALARM))
static struct rt_alarm_container _container;
rt_inline rt_uint32_t alarm_mkdaysec(struct tm *time)
{
rt_uint32_t sec;
sec = time->tm_sec;
sec += time->tm_min * 60;
sec += time->tm_hour * 3600;
return (sec);
}
static rt_err_t alarm_set(struct rt_alarm *alarm)
{
rt_device_t device;
struct rt_rtc_wkalarm wkalarm;
rt_err_t ret;
device = rt_device_find("rtc");
if (device == RT_NULL)
{
return (RT_ERROR);
}
if (alarm->flag & RT_ALARM_STATE_START)
wkalarm.enable = RT_TRUE;
else
wkalarm.enable = RT_FALSE;
wkalarm.tm_sec = alarm->wktime.tm_sec;
wkalarm.tm_min = alarm->wktime.tm_min;
wkalarm.tm_hour = alarm->wktime.tm_hour;
ret = rt_device_control(device, RT_DEVICE_CTRL_RTC_SET_ALARM, &wkalarm);
if ((ret == RT_EOK) && wkalarm.enable)
{
ret = rt_device_control(device, RT_DEVICE_CTRL_RTC_GET_ALARM, &wkalarm);
if (ret == RT_EOK)
{
/*
some RTC device like RX8025,it's alarms precision is 1 minute.
in this case,low level RTC driver should set wkalarm->tm_sec to 0.
*/
alarm->wktime.tm_sec = wkalarm.tm_sec;
alarm->wktime.tm_min = wkalarm.tm_min;
alarm->wktime.tm_hour = wkalarm.tm_hour;
}
}
return (ret);
}
static void alarm_wakeup(struct rt_alarm *alarm, struct tm *now)
{
rt_uint32_t sec_alarm, sec_now;
rt_bool_t wakeup = RT_FALSE;
time_t timestamp;
sec_alarm = alarm_mkdaysec(&alarm->wktime);
sec_now = alarm_mkdaysec(now);
if (alarm->flag & RT_ALARM_STATE_START)
{
switch (alarm->flag & 0xFF00)
{
case RT_ALARM_ONESHOT:
{
sec_alarm = mktime(&alarm->wktime);
sec_now = mktime(now);
if (((sec_now - sec_alarm) <= RT_ALARM_DELAY) && (sec_now >= sec_alarm))
{
/* stop alarm */
alarm->flag &= ~RT_ALARM_STATE_START;
alarm_set(alarm);
wakeup = RT_TRUE;
}
}
break;
case RT_ALARM_DAILY:
{
if (((sec_now - sec_alarm) <= RT_ALARM_DELAY) && (sec_now >= sec_alarm))
wakeup = RT_TRUE;
}
break;
case RT_ALARM_WEEKLY:
{
/* alarm at wday */
sec_alarm += alarm->wktime.tm_wday * 24 * 3600;
sec_now += now->tm_wday * 24 * 3600;
if (((sec_now - sec_alarm) <= RT_ALARM_DELAY) && (sec_now >= sec_alarm))
wakeup = RT_TRUE;
}
break;
case RT_ALARM_MONTHLY:
{
/* monthly someday generate alarm signals */
if (alarm->wktime.tm_mday == now->tm_mday)
{
if ((sec_now - sec_alarm) <= RT_ALARM_DELAY)
wakeup = RT_TRUE;
}
}
break;
case RT_ALARM_YAERLY:
{
if ((alarm->wktime.tm_mday == now->tm_mday) && \
(alarm->wktime.tm_mon == now->tm_mon))
{
if ((sec_now - sec_alarm) <= RT_ALARM_DELAY)
wakeup = RT_TRUE;
}
}
break;
}
if ((wakeup == RT_TRUE) && (alarm->callback != RT_NULL))
{
timestamp = time(RT_NULL);
alarm->callback(alarm, timestamp);
}
}
}
static void alarm_update(rt_uint32_t event)
{
struct rt_alarm *alm_prev = RT_NULL, *alm_next = RT_NULL;
struct rt_alarm *alarm;
rt_int32_t sec_now, sec_alarm, sec_tmp;
rt_int32_t sec_next = 24 * 3600, sec_prev = 0;
time_t timestamp;
struct tm now;
rt_list_t *next;
rt_mutex_take(&_container.mutex, RT_WAITING_FOREVER);
if (!rt_list_isempty(&_container.head))
{
/* get time of now */
timestamp = time(RT_NULL);
localtime_r(&timestamp, &now);
for (next = _container.head.next; next != &_container.head; next = next->next)
{
alarm = rt_list_entry(next, struct rt_alarm, list);
/* check the overtime alarm */
alarm_wakeup(alarm, &now);
}
timestamp = time(RT_NULL);
localtime_r(&timestamp, &now);
sec_now = alarm_mkdaysec(&now);
for (next = _container.head.next; next != &_container.head; next = next->next)
{
alarm = rt_list_entry(next, struct rt_alarm, list);
/* calculate seconds from 00:00:00 */
sec_alarm = alarm_mkdaysec(&alarm->wktime);
if ((alarm->flag & RT_ALARM_STATE_START) && (alarm != _container.current))
{
sec_tmp = sec_alarm - sec_now;
if (sec_tmp > 0)
{
/* find alarm after now(now to 23:59:59) and the most recent */
if (sec_tmp < sec_next)
{
sec_next = sec_tmp;
alm_next = alarm;
}
}
else
{
/* find alarm before now(00:00:00 to now) and furthest from now */
if (sec_tmp < sec_prev)
{
sec_prev = sec_tmp;
alm_prev = alarm;
}
}
}
}
/* enable the alarm after now first */
if (sec_next < 24 * 3600)
{
if (alarm_set(alm_next) == RT_EOK)
_container.current = alm_next;
}
else if (sec_prev < 0)
{
/* enable the alarm before now */
if (alarm_set(alm_prev) == RT_EOK)
_container.current = alm_prev;
}
}
rt_mutex_release(&_container.mutex);
}
static rt_uint32_t days_of_year_month(int tm_year, int tm_mon)
{
rt_uint32_t ret, year;
year = tm_year + 1900;
if (tm_mon == 1)
{
ret = 28 + ((!(year % 4) && (year % 100)) || !(year % 400));
}
else if (((tm_mon <= 6) && (tm_mon % 2 == 0)) || ((tm_mon > 6) && (tm_mon % 2 == 1)))
{
ret = 31;
}
else
{
ret = 30;
}
return (ret);
}
static rt_bool_t is_valid_date(struct tm *date)
{
if ((date->tm_year < 0) || (date->tm_year > RT_RTC_YEARS_MAX))
{
return (RT_FALSE);
}
if ((date->tm_mon < 0) || (date->tm_mon > 11))
{
return (RT_FALSE);
}
if ((date->tm_mday < 1) || \
(date->tm_mday > days_of_year_month(date->tm_year, date->tm_mon)))
{
return (RT_FALSE);
}
return (RT_TRUE);
}
static rt_err_t alarm_setup(rt_alarm_t alarm, struct tm *wktime)
{
rt_err_t ret = RT_ERROR;
time_t timestamp;
struct tm *setup, now;
setup = &alarm->wktime;
*setup = *wktime;
timestamp = time(RT_NULL);
localtime_r(&timestamp, &now);
/* if these are a "don't care" value,we set them to now*/
if ((setup->tm_sec > 59) || (setup->tm_sec < 0))
setup->tm_sec = now.tm_sec;
if ((setup->tm_min > 59) || (setup->tm_min < 0))
setup->tm_min = now.tm_min;
if ((setup->tm_hour > 23) || (setup->tm_hour < 0))
setup->tm_hour = now.tm_hour;
switch (alarm->flag & 0xFF00)
{
case RT_ALARM_DAILY:
{
/* do nothing but needed */
}
break;
case RT_ALARM_ONESHOT:
{
/* if these are "don't care" value we set them to now */
if (setup->tm_year == RT_ALARM_TM_NOW)
setup->tm_year = now.tm_year;
if (setup->tm_mon == RT_ALARM_TM_NOW)
setup->tm_mon = now.tm_mon;
if (setup->tm_mday == RT_ALARM_TM_NOW)
setup->tm_mday = now.tm_mday;
/* make sure the setup is valid */
if (!is_valid_date(setup))
goto _exit;
}
break;
case RT_ALARM_WEEKLY:
{
/* if tm_wday is a "don't care" value we set it to now */
if ((setup->tm_wday < 0) || (setup->tm_wday > 6))
setup->tm_wday = now.tm_wday;
}
break;
case RT_ALARM_MONTHLY:
{
/* if tm_mday is a "don't care" value we set it to now */
if ((setup->tm_mday < 1) || (setup->tm_mday > 31))
setup->tm_mday = now.tm_mday;
}
break;
case RT_ALARM_YAERLY:
{
/* if tm_mon is a "don't care" value we set it to now */
if ((setup->tm_mon < 0) || (setup->tm_mon > 11))
setup->tm_mon = now.tm_mon;
if (setup->tm_mon == 1)
{
/* tm_mon is February */
/* tm_mday should be 1~29.otherwise,it's a "don't care" value */
if ((setup->tm_mday < 1) || (setup->tm_mday > 29))
setup->tm_mday = now.tm_mday;
}
else if (((setup->tm_mon <= 6) && (setup->tm_mon % 2 == 0)) || \
((setup->tm_mon > 6) && (setup->tm_mon % 2 == 1)))
{
/* Jan,Mar,May,Jul,Aug,Oct,Dec */
/* tm_mday should be 1~31.otherwise,it's a "don't care" value */
if ((setup->tm_mday < 1) || (setup->tm_mday > 31))
setup->tm_mday = now.tm_mday;
}
else
{
/* tm_mday should be 1~30.otherwise,it's a "don't care" value */
if ((setup->tm_mday < 1) || (setup->tm_mday > 30))
setup->tm_mday = now.tm_mday;
}
}
break;
default:
{
goto _exit;
}
}
if ((setup->tm_hour == 23) && (setup->tm_min == 59) && (setup->tm_sec == 59))
{
/*
for insurance purposes, we will generate an alarm
signal two seconds ahead of.
*/
setup->tm_sec = 60 - RT_ALARM_DELAY;
}
/* set initialized state */
alarm->flag |= RT_ALARM_STATE_INITED;
ret = RT_EOK;
_exit:
return (ret);
}
/** \brief send a rtc alarm event
*
* \param dev pointer to RTC device(currently unused,you can ignore it)
* \param event RTC event(currently unused)
* \return none
*/
void rt_alarm_update(rt_device_t dev, rt_uint32_t event)
{
rt_event_send(&_container.event, 1);
}
/** \brief modify the alarm setup
*
* \param alarm pointer to alarm
* \param cmd control command
* \param arg argument
*/
rt_err_t rt_alarm_control(rt_alarm_t alarm, rt_uint8_t cmd, void *arg)
{
rt_err_t ret = RT_ERROR;
RT_ASSERT(alarm != RT_NULL);
rt_mutex_take(&_container.mutex, RT_WAITING_FOREVER);
switch (cmd)
{
case RT_ALARM_MODIFY:
{
struct rt_alarm_setup *setup;
RT_ASSERT(arg != RT_NULL);
setup = arg;
rt_alarm_stop(alarm);
alarm->flag = setup->flag & 0xFF00;
alarm->wktime = setup->wktime;
ret = alarm_setup(alarm, &alarm->wktime);
}
break;
}
rt_mutex_release(&_container.mutex);
return (ret);
}
/** \brief start a alarm
*
* \param alarm pointer to alarm
* \return RT_EOK
*/
rt_err_t rt_alarm_start(rt_alarm_t alarm)
{
rt_int32_t sec_now, sec_old, sec_new;
rt_err_t ret = RT_ERROR;
time_t timestamp;
struct tm now;
if (alarm == RT_NULL)
return (ret);
rt_mutex_take(&_container.mutex, RT_WAITING_FOREVER);
if (!(alarm->flag & RT_ALARM_STATE_INITED))
{
if (alarm_setup(alarm, &alarm->wktime) != RT_EOK)
goto _exit;
}
if ((alarm->flag & 0x01) == RT_ALARM_STATE_STOP)
{
timestamp = time(RT_NULL);
localtime_r(&timestamp, &now);
alarm->flag |= RT_ALARM_STATE_START;
/* set alarm */
if (_container.current == RT_NULL)
{
ret = alarm_set(alarm);
}
else
{
sec_now = alarm_mkdaysec(&now);
sec_old = alarm_mkdaysec(&_container.current->wktime);
sec_new = alarm_mkdaysec(&alarm->wktime);
if ((sec_new < sec_old) && (sec_new > sec_now))
{
ret = alarm_set(alarm);
}
else if ((sec_new > sec_now) && (sec_old < sec_now))
{
ret = alarm_set(alarm);
}
else if ((sec_new < sec_old) && (sec_old < sec_now))
{
ret = alarm_set(alarm);
}
else
{
ret = RT_EOK;
goto _exit;
}
}
if (ret == RT_EOK)
{
_container.current = alarm;
}
}
_exit:
rt_mutex_release(&_container.mutex);
return (ret);
}
/** \brief stop a alarm
*
* \param alarm pointer to alarm
* \return RT_EOK
*/
rt_err_t rt_alarm_stop(rt_alarm_t alarm)
{
rt_err_t ret = RT_ERROR;
if (alarm == RT_NULL)
return (ret);
rt_mutex_take(&_container.mutex, RT_WAITING_FOREVER);
if (!(alarm->flag & RT_ALARM_STATE_START))
goto _exit;
/* stop alarm */
alarm->flag &= ~RT_ALARM_STATE_START;
if (_container.current == alarm)
{
ret = alarm_set(alarm);
_container.current = RT_NULL;
}
if (ret == RT_EOK)
alarm_update(0);
_exit:
rt_mutex_release(&_container.mutex);
return (ret);
}
/** \brief delete a alarm
*
* \param alarm pointer to alarm
* \return RT_EOK
*/
rt_err_t rt_alarm_delete(rt_alarm_t alarm)
{
rt_err_t ret = RT_ERROR;
if (alarm == RT_NULL)
return (ret);
rt_mutex_take(&_container.mutex, RT_WAITING_FOREVER);
/* stop the alarm */
alarm->flag &= ~RT_ALARM_STATE_START;
if (_container.current == alarm)
{
ret = alarm_set(alarm);
_container.current = RT_NULL;
/* set new alarm if necessary */
alarm_update(0);
}
rt_list_remove(&alarm->list);
rt_free(alarm);
rt_mutex_release(&_container.mutex);
return (ret);
}
/** \brief create a alarm
*
* \param flag set alarm mode e.g: RT_ALARM_DAILY
* \param setup pointer to setup infomation
*/
rt_alarm_t rt_alarm_create(rt_alarm_callback_t callback, struct rt_alarm_setup *setup)
{
struct rt_alarm *alarm;
if (setup == RT_NULL)
return (RT_NULL);
alarm = rt_malloc(sizeof(struct rt_alarm));
if (alarm == RT_NULL)
return (RT_NULL);
rt_list_init(&alarm->list);
alarm->wktime = setup->wktime;
alarm->flag = setup->flag & 0xFF00;
alarm->callback = callback;
rt_mutex_take(&_container.mutex, RT_WAITING_FOREVER);
rt_list_insert_after(&_container.head, &alarm->list);
rt_mutex_release(&_container.mutex);
return (alarm);
}
/** \brief rtc alarm service thread entry
*
*/
static void rt_alarmsvc_thread_init(void *param)
{
rt_uint32_t recv;
rt_list_init(&_container.head);
rt_event_init(&_container.event, "alarmsvc", RT_IPC_FLAG_FIFO);
rt_mutex_init(&_container.mutex, "alarmsvc", RT_IPC_FLAG_FIFO);
_container.current = RT_NULL;
while (1)
{
if (rt_event_recv(&_container.event, 0xFFFF,
RT_EVENT_FLAG_OR | RT_EVENT_FLAG_CLEAR,
RT_WAITING_FOREVER, &recv) == RT_EOK)
{
alarm_update(recv);
}
}
}
/** \brief initialize alarm service system
*
* \param none
* \return none
*/
void rt_alarm_system_init(void)
{
rt_thread_t tid;
tid = rt_thread_create("alarmsvc",
rt_alarmsvc_thread_init, RT_NULL,
512, 8, 1);
if (tid != RT_NULL)
rt_thread_startup(tid);
}
#endif
components/drivers/src/completion.c
浏览文件 @ 68b7e7c4
......@@ -89,6 +89,7 @@ rt_err_t rt_completion_wait(struct rt_completion *completion,
__exit:
rt_hw_interrupt_enable(level);
return result;
}
......
components/drivers/src/pipe.c
浏览文件 @ 68b7e7c4
/*
* File : pipe.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2012, RT-Thread Development Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2012-09-30 Bernard first version.
*/
#include <rthw.h>
#include <rtthread.h>
#include <rtdevice.h>
static rt_size_t rt_pipe_read(rt_device_t dev,
rt_off_t pos,
void *buffer,
rt_size_t size)
{
rt_uint32_t level;
rt_thread_t thread;
struct rt_pipe_device *pipe;
rt_size_t read_nbytes;
pipe = PIPE_DEVICE(dev);
RT_ASSERT(pipe != RT_NULL);
thread = rt_thread_self();
/* current context checking */
RT_DEBUG_NOT_IN_INTERRUPT;
do
{
level = rt_hw_interrupt_disable();
read_nbytes = rt_ringbuffer_get(&(pipe->ringbuffer), buffer, size);
if (read_nbytes == 0)
{
rt_thread_suspend(thread);
/* waiting on suspended read list */
rt_list_insert_before(&(pipe->suspended_read_list), &(thread->tlist));
rt_hw_interrupt_enable(level);
rt_schedule();
}
else
{
if (!rt_list_isempty(&pipe->suspended_write_list))
{
/* get suspended thread */
thread = rt_list_entry(pipe->suspended_write_list.next,
struct rt_thread, tlist);
/* resume the write thread */
rt_thread_resume(thread);
rt_hw_interrupt_enable(level);
rt_schedule();
}
else
{
rt_hw_interrupt_enable(level);
}
break;
}
} while (read_nbytes == 0);
return read_nbytes;
}
struct rt_pipe_device *_pipe = RT_NULL;
static rt_size_t rt_pipe_write(rt_device_t dev,
rt_off_t pos,
const void *buffer,
rt_size_t size)
{
rt_uint32_t level;
rt_thread_t thread;
struct rt_pipe_device *pipe;
rt_size_t write_nbytes;
pipe = PIPE_DEVICE(dev);
RT_ASSERT(pipe != RT_NULL);
if (_pipe == RT_NULL)
_pipe = pipe;
thread = rt_thread_self();
/* current context checking */
RT_DEBUG_NOT_IN_INTERRUPT;
do
{
level = rt_hw_interrupt_disable();
write_nbytes = rt_ringbuffer_put(&(pipe->ringbuffer), buffer, size);
if (write_nbytes == 0)
{
/* pipe full, waiting on suspended write list */
rt_thread_suspend(thread);
/* waiting on suspended read list */
rt_list_insert_before(&(pipe->suspended_write_list), &(thread->tlist));
rt_hw_interrupt_enable(level);
rt_schedule();
}
else
{
if (!rt_list_isempty(&pipe->suspended_read_list))
{
/* get suspended thread */
thread = rt_list_entry(pipe->suspended_read_list.next,
struct rt_thread, tlist);
/* resume the read thread */
rt_thread_resume(thread);
rt_hw_interrupt_enable(level);
rt_schedule();
}
else
{
rt_hw_interrupt_enable(level);
}
break;
}
}while (write_nbytes == 0);
return write_nbytes;
}
static rt_err_t rt_pipe_control(rt_device_t dev, rt_uint8_t cmd, void *args)
{
return RT_EOK;
}
rt_err_t rt_pipe_create(const char *name, rt_size_t size)
{
rt_err_t result = RT_EOK;
rt_uint8_t *rb_memptr = RT_NULL;
struct rt_pipe_device *pipe = RT_NULL;
/* get aligned size */
size = RT_ALIGN(size, RT_ALIGN_SIZE);
pipe = (struct rt_pipe_device *)rt_calloc(1, sizeof(struct rt_pipe_device));
if (pipe != RT_NULL)
{
/* create ring buffer of pipe */
rb_memptr = rt_malloc(size);
if (rb_memptr == RT_NULL)
{
result = -RT_ENOMEM;
goto __exit;
}
/* initialize suspended list */
rt_list_init(&pipe->suspended_read_list);
rt_list_init(&pipe->suspended_write_list);
/* initialize ring buffer */
rt_ringbuffer_init(&pipe->ringbuffer, rb_memptr, size);
/* create device */
pipe->parent.type = RT_Device_Class_Char;
pipe->parent.init = RT_NULL;
pipe->parent.open = RT_NULL;
pipe->parent.close = RT_NULL;
pipe->parent.read = rt_pipe_read;
pipe->parent.write = rt_pipe_write;
pipe->parent.control = rt_pipe_control;
return rt_device_register(&(pipe->parent), name, RT_DEVICE_FLAG_RDWR);
}
else
{
result = -RT_ENOMEM;
}
__exit:
if (pipe != RT_NULL)
rt_free(pipe);
if (rb_memptr != RT_NULL)
rt_free(rb_memptr);
return result;
}
RTM_EXPORT(rt_pipe_create);
void rt_pipe_destroy(struct rt_pipe_device *pipe)
{
if (pipe == RT_NULL)
return;
/* un-register pipe device */
rt_device_unregister(&(pipe->parent));
/* release memory */
rt_free(pipe->ringbuffer.buffer_ptr);
rt_free(pipe);
return;
}
RTM_EXPORT(rt_pipe_destroy);
/*
* File : pipe.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2012, RT-Thread Development Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2012-09-30 Bernard first version.
*/
#include <rthw.h>
#include <rtthread.h>
#include <rtdevice.h>
static rt_size_t rt_pipe_read(rt_device_t dev,
rt_off_t pos,
void *buffer,
rt_size_t size)
{
rt_uint32_t level;
rt_thread_t thread;
struct rt_pipe_device *pipe;
rt_size_t read_nbytes;
pipe = PIPE_DEVICE(dev);
RT_ASSERT(pipe != RT_NULL);
thread = rt_thread_self();
/* current context checking */
RT_DEBUG_NOT_IN_INTERRUPT;
do
{
level = rt_hw_interrupt_disable();
read_nbytes = rt_ringbuffer_get(&(pipe->ringbuffer), buffer, size);
if (read_nbytes == 0)
{
rt_thread_suspend(thread);
/* waiting on suspended read list */
rt_list_insert_before(&(pipe->suspended_read_list), &(thread->tlist));
rt_hw_interrupt_enable(level);
rt_schedule();
}
else
{
if (!rt_list_isempty(&pipe->suspended_write_list))
{
/* get suspended thread */
thread = rt_list_entry(pipe->suspended_write_list.next,
struct rt_thread, tlist);
/* resume the write thread */
rt_thread_resume(thread);
rt_hw_interrupt_enable(level);
rt_schedule();
}
else
{
rt_hw_interrupt_enable(level);
}
break;
}
} while (read_nbytes == 0);
return read_nbytes;
}
struct rt_pipe_device *_pipe = RT_NULL;
static rt_size_t rt_pipe_write(rt_device_t dev,
rt_off_t pos,
const void *buffer,
rt_size_t size)
{
rt_uint32_t level;
rt_thread_t thread;
struct rt_pipe_device *pipe;
rt_size_t write_nbytes;
pipe = PIPE_DEVICE(dev);
RT_ASSERT(pipe != RT_NULL);
if (_pipe == RT_NULL)
_pipe = pipe;
thread = rt_thread_self();
/* current context checking */
RT_DEBUG_NOT_IN_INTERRUPT;
do
{
level = rt_hw_interrupt_disable();
write_nbytes = rt_ringbuffer_put(&(pipe->ringbuffer), buffer, size);
if (write_nbytes == 0)
{
/* pipe full, waiting on suspended write list */
rt_thread_suspend(thread);
/* waiting on suspended read list */
rt_list_insert_before(&(pipe->suspended_write_list), &(thread->tlist));
rt_hw_interrupt_enable(level);
rt_schedule();
}
else
{
if (!rt_list_isempty(&pipe->suspended_read_list))
{
/* get suspended thread */
thread = rt_list_entry(pipe->suspended_read_list.next,
struct rt_thread, tlist);
/* resume the read thread */
rt_thread_resume(thread);
rt_hw_interrupt_enable(level);
rt_schedule();
}
else
{
rt_hw_interrupt_enable(level);
}
break;
}
}while (write_nbytes == 0);
return write_nbytes;
}
static rt_err_t rt_pipe_control(rt_device_t dev, rt_uint8_t cmd, void *args)
{
return RT_EOK;
}
rt_err_t rt_pipe_create(const char *name, rt_size_t size)
{
rt_err_t result = RT_EOK;
rt_uint8_t *rb_memptr = RT_NULL;
struct rt_pipe_device *pipe = RT_NULL;
/* get aligned size */
size = RT_ALIGN(size, RT_ALIGN_SIZE);
pipe = (struct rt_pipe_device *)rt_calloc(1, sizeof(struct rt_pipe_device));
if (pipe != RT_NULL)
{
/* create ring buffer of pipe */
rb_memptr = rt_malloc(size);
if (rb_memptr == RT_NULL)
{
result = -RT_ENOMEM;
goto __exit;
}
/* initialize suspended list */
rt_list_init(&pipe->suspended_read_list);
rt_list_init(&pipe->suspended_write_list);
/* initialize ring buffer */
rt_ringbuffer_init(&pipe->ringbuffer, rb_memptr, size);
/* create device */
pipe->parent.type = RT_Device_Class_Char;
pipe->parent.init = RT_NULL;
pipe->parent.open = RT_NULL;
pipe->parent.close = RT_NULL;
pipe->parent.read = rt_pipe_read;
pipe->parent.write = rt_pipe_write;
pipe->parent.control = rt_pipe_control;
return rt_device_register(&(pipe->parent), name, RT_DEVICE_FLAG_RDWR);
}
else
{
result = -RT_ENOMEM;
}
__exit:
if (pipe != RT_NULL)
rt_free(pipe);
if (rb_memptr != RT_NULL)
rt_free(rb_memptr);
return result;
}
RTM_EXPORT(rt_pipe_create);
void rt_pipe_destroy(struct rt_pipe_device *pipe)
{
if (pipe == RT_NULL)
return;
/* un-register pipe device */
rt_device_unregister(&(pipe->parent));
/* release memory */
rt_free(pipe->ringbuffer.buffer_ptr);
rt_free(pipe);
return;
}
RTM_EXPORT(rt_pipe_destroy);
components/drivers/src/ringbuffer.c
浏览文件 @ 68b7e7c4
/*
* File : ringbuffer.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2012, RT-Thread Development Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2012-09-30 Bernard first version.
*/
#include <rtthread.h>
#include <rtdevice.h>
#include <string.h>
void rt_ringbuffer_init(struct rt_ringbuffer *rb,
rt_uint8_t *pool,
rt_uint16_t size)
{
RT_ASSERT(rb != RT_NULL);
/* initialize read and write index */
rb->read_index = rb->write_index = 0;
/* set buffer pool and size */
rb->buffer_ptr = pool;
rb->buffer_size = RT_ALIGN_DOWN(size, RT_ALIGN_SIZE);
}
RTM_EXPORT(rt_ringbuffer_init);
rt_size_t rt_ringbuffer_put(struct rt_ringbuffer *rb,
const rt_uint8_t *ptr,
rt_uint16_t length)
{
rt_uint16_t size;
rt_uint16_t mask;
rt_uint16_t write_position;
RT_ASSERT(rb != RT_NULL);
mask = rb->buffer_size - 1;
/* whether has enough space */
size = rb->buffer_size - (rb->write_index - rb->read_index);
/* no space */
if (size == 0) return 0;
/* drop some data */
if (size < length) length = size;
write_position = (rb->write_index & mask);
if (rb->buffer_size - write_position> length)
{
/* read_index - write_index = empty space */
memcpy(&rb->buffer_ptr[write_position], ptr, length);
}
else
{
memcpy(&rb->buffer_ptr[write_position], ptr,
rb->buffer_size - write_position);
memcpy(&rb->buffer_ptr[0], &ptr[rb->buffer_size - write_position],
length - (rb->buffer_size - write_position));
}
rb->write_index += length;
return length;
}
RTM_EXPORT(rt_ringbuffer_put);
/**
* put a character into ring buffer
*/
rt_size_t rt_ringbuffer_putchar(struct rt_ringbuffer* rb, const rt_uint8_t ch)
{
rt_uint16_t mask;
RT_ASSERT(rb != RT_NULL);
/* whether has enough space */
mask = rb->buffer_size - 1;
/* whether has enough space */
if (rb->write_index - rb->read_index == rb->buffer_size) return 0;
/* put character */
rb->buffer_ptr[rb->write_index & mask] = ch;
rb->write_index += 1;
return 1;
}
RTM_EXPORT(rt_ringbuffer_putchar);
/**
* get data from ring buffer
*/
rt_size_t rt_ringbuffer_get(struct rt_ringbuffer *rb,
rt_uint8_t *ptr,
rt_uint16_t length)
{
rt_size_t size;
rt_uint16_t mask;
rt_uint16_t read_position;
RT_ASSERT(rb != RT_NULL);
/* whether has enough data */
mask = rb->buffer_size - 1;
size = rb->write_index - rb->read_index;
/* no data */
if (size == 0) return 0;
/* less data */
if (size < length) length = size;
read_position = rb->read_index & mask;
if (rb->buffer_size - read_position >= length)
{
/* copy all of data */
memcpy(ptr, &rb->buffer_ptr[read_position], length);
}
else
{
/* copy first and second */
memcpy(ptr, &rb->buffer_ptr[read_position],
rb->buffer_size - read_position);
memcpy(&ptr[rb->buffer_size - read_position], &rb->buffer_ptr[0],
length - rb->buffer_size + read_position);
}
rb->read_index += length;
return length;
}
RTM_EXPORT(rt_ringbuffer_get);
/**
* get a character from a ringbuffer
*/
rt_size_t rt_ringbuffer_getchar(struct rt_ringbuffer *rb, rt_uint8_t *ch)
{
rt_uint16_t mask;
RT_ASSERT(rb != RT_NULL);
/* ringbuffer is empty */
if (rb->read_index == rb->write_index) return 0;
mask = rb->buffer_size - 1;
/* put character */
*ch = rb->buffer_ptr[rb->read_index & mask];
rb->read_index += 1;
return 1;
}
RTM_EXPORT(rt_ringbuffer_getchar);
/*
* File : ringbuffer.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2012, RT-Thread Development Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2012-09-30 Bernard first version.
*/
#include <rtthread.h>
#include <rtdevice.h>
#include <string.h>
void rt_ringbuffer_init(struct rt_ringbuffer *rb,
rt_uint8_t *pool,
rt_uint16_t size)
{
RT_ASSERT(rb != RT_NULL);
/* initialize read and write index */
rb->read_index = rb->write_index = 0;
/* set buffer pool and size */
rb->buffer_ptr = pool;
rb->buffer_size = RT_ALIGN_DOWN(size, RT_ALIGN_SIZE);
}
RTM_EXPORT(rt_ringbuffer_init);
rt_size_t rt_ringbuffer_put(struct rt_ringbuffer *rb,
const rt_uint8_t *ptr,
rt_uint16_t length)
{
rt_uint16_t size;
rt_uint16_t mask;
rt_uint16_t write_position;
RT_ASSERT(rb != RT_NULL);
mask = rb->buffer_size - 1;
/* whether has enough space */
size = rb->buffer_size - (rb->write_index - rb->read_index);
/* no space */
if (size == 0)
return 0;
/* drop some data */
if (size < length)
length = size;
write_position = (rb->write_index & mask);
if (rb->buffer_size - write_position> length)
{
/* read_index - write_index = empty space */
memcpy(&rb->buffer_ptr[write_position], ptr, length);
}
else
{
memcpy(&rb->buffer_ptr[write_position], ptr,
rb->buffer_size - write_position);
memcpy(&rb->buffer_ptr[0], &ptr[rb->buffer_size - write_position],
length - (rb->buffer_size - write_position));
}
rb->write_index += length;
return length;
}
RTM_EXPORT(rt_ringbuffer_put);
/**
* put a character into ring buffer
*/
rt_size_t rt_ringbuffer_putchar(struct rt_ringbuffer *rb, const rt_uint8_t ch)
{
rt_uint16_t mask;
RT_ASSERT(rb != RT_NULL);
/* whether has enough space */
mask = rb->buffer_size - 1;
/* whether has enough space */
if (rb->write_index - rb->read_index == rb->buffer_size)
return 0;
/* put character */
rb->buffer_ptr[rb->write_index & mask] = ch;
rb->write_index += 1;
return 1;
}
RTM_EXPORT(rt_ringbuffer_putchar);
/**
* get data from ring buffer
*/
rt_size_t rt_ringbuffer_get(struct rt_ringbuffer *rb,
rt_uint8_t *ptr,
rt_uint16_t length)
{
rt_size_t size;
rt_uint16_t mask;
rt_uint16_t read_position;
RT_ASSERT(rb != RT_NULL);
/* whether has enough data */
mask = rb->buffer_size - 1;
size = rb->write_index - rb->read_index;
/* no data */
if (size == 0)
return 0;
/* less data */
if (size < length)
length = size;
read_position = rb->read_index & mask;
if (rb->buffer_size - read_position >= length)
{
/* copy all of data */
memcpy(ptr, &rb->buffer_ptr[read_position], length);
}
else
{
/* copy first and second */
memcpy(ptr, &rb->buffer_ptr[read_position],
rb->buffer_size - read_position);
memcpy(&ptr[rb->buffer_size - read_position], &rb->buffer_ptr[0],
length - rb->buffer_size + read_position);
}
rb->read_index += length;
return length;
}
RTM_EXPORT(rt_ringbuffer_get);
/**
* get a character from a ringbuffer
*/
rt_size_t rt_ringbuffer_getchar(struct rt_ringbuffer *rb, rt_uint8_t *ch)
{
rt_uint16_t mask;
RT_ASSERT(rb != RT_NULL);
/* ringbuffer is empty */
if (rb->read_index == rb->write_index)
return 0;
mask = rb->buffer_size - 1;
/* put character */
*ch = rb->buffer_ptr[rb->read_index & mask];
rb->read_index += 1;
return 1;
}
RTM_EXPORT(rt_ringbuffer_getchar);
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