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提交 1bbe09df 编写于 作者: 勤 勤为本 提交者： Bernard Xiong
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把龙芯1c的SPI接口改为RTT统一的SPI接口

上级 d6f80720
隐藏空白更改
内联 并排
Showing with 389 addition and 204 deletion
bsp/ls1cdev/drivers/drv_spi.c 0 → 100644
浏览文件 @ 1bbe09df
/*
* File : drv_spi.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006 - 2012, RT-Thread Development Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Change Logs:
* Date Author Notes
* 2017-11-02 勤为本 first version
*/
#include <rtthread.h>
#include <drivers/spi.h>
#include "drv_spi.h"
//#define DEBUG
#ifdef DEBUG
#define DEBUG_PRINTF(...) rt_kprintf(__VA_ARGS__)
#else
#define DEBUG_PRINTF(...)
#endif
static rt_err_t configure(struct rt_spi_device *device, struct rt_spi_configuration *configuration);
static rt_uint32_t xfer(struct rt_spi_device *device, struct rt_spi_message *message);
static struct rt_spi_ops ls1c_spi_ops =
{
.configure = configure,
.xfer = xfer
};
static rt_err_t configure(struct rt_spi_device *device,
struct rt_spi_configuration *configuration)
{
struct rt_spi_bus *spi_bus = NULL;
struct ls1c_spi *ls1c_spi = NULL;
unsigned char SPIx = 0;
void *spi_base = NULL;
unsigned char cpol = 0;
unsigned char cpha = 0;
unsigned char val = 0;
RT_ASSERT(NULL != device);
RT_ASSERT(NULL != configuration);
spi_bus = device->bus;
ls1c_spi = (struct ls1c_spi *)spi_bus->parent.user_data;
SPIx = ls1c_spi->SPIx;
spi_base = ls1c_spi_get_base(SPIx);
{
// 使能SPI控制器，master模式，关闭中断
reg_write_8(0x53, spi_base + LS1C_SPI_SPCR_OFFSET);
// 清空状态寄存器
reg_write_8(0xc0, spi_base + LS1C_SPI_SPSR_OFFSET);
// 1字节产生中断，采样(读)与发送(写)时机同时
reg_write_8(0x03, spi_base + LS1C_SPI_SPER_OFFSET);
// 关闭SPI flash
val = reg_read_8(spi_base + LS1C_SPI_SFC_PARAM_OFFSET);
val &= 0xfe;
reg_write_8(val, spi_base + LS1C_SPI_SFC_PARAM_OFFSET);
// spi flash时序控制寄存器
reg_write_8(0x05, spi_base + LS1C_SPI_SFC_TIMING_OFFSET);
}
// baudrate
ls1c_spi_set_clock(spi_base, configuration->max_hz);
// 设置通信模式(时钟极性和相位)
if (configuration->mode & RT_SPI_CPOL) // cpol
{
cpol = SPI_CPOL_1;
}
else
{
cpol = SPI_CPOL_0;
}
if (configuration->mode & RT_SPI_CPHA) // cpha
{
cpha = SPI_CPHA_1;
}
else
{
cpha = SPI_CPHA_0;
}
ls1c_spi_set_mode(spi_base, cpol, cpha);
DEBUG_PRINTF("ls1c spi%d configuration\n", SPIx);
return RT_EOK;
}
static rt_uint32_t xfer(struct rt_spi_device *device,
struct rt_spi_message *message)
{
struct rt_spi_bus *spi_bus = NULL;
struct ls1c_spi *ls1c_spi = NULL;
void *spi_base = NULL;
unsigned char SPIx = 0;
struct ls1c_spi_cs *ls1c_spi_cs = NULL;
unsigned char cs = 0;
rt_uint32_t size = 0;
const rt_uint8_t *send_ptr = NULL;
rt_uint8_t *recv_ptr = NULL;
rt_uint8_t data = 0;
RT_ASSERT(NULL != device);
RT_ASSERT(NULL != message);
spi_bus = device->bus;
ls1c_spi = spi_bus->parent.user_data;
SPIx = ls1c_spi->SPIx;
spi_base = ls1c_spi_get_base(SPIx);
ls1c_spi_cs = device->parent.user_data;
cs = ls1c_spi_cs->cs;
size = message->length;
DEBUG_PRINTF("[%s] SPIx=%d, cs=%d\n", __FUNCTION__, SPIx, cs);
// take cs
if (message->cs_take)
{
ls1c_spi_set_cs(spi_base, cs, 0);
}
// 收发数据
send_ptr = message->send_buf;
recv_ptr = message->recv_buf;
while (size--)
{
data = 0xFF;
if (NULL != send_ptr)
{
data = *send_ptr++;
}
if (NULL != recv_ptr)
{
*recv_ptr++ = ls1c_spi_txrx_byte(spi_base, data);
}
else
{
ls1c_spi_txrx_byte(spi_base, data);
}
}
// release cs
if (message->cs_release)
{
ls1c_spi_set_cs(spi_base, cs, 1);
}
return message->length;
}
#ifdef RT_USING_SPI0
struct ls1c_spi ls1c_spi0 =
{
.SPIx = LS1C_SPI_0,
};
static struct rt_spi_bus spi0_bus;
#endif
#ifdef RT_USING_SPI1
struct ls1c_spi ls1c_spi1 =
{
.SPIx = LS1C_SPI_1,
};
static struct rt_spi_bus spi1_bus;
#endif
/*
* 初始化并注册龙芯1c的spi总线
* @SPI SPI总线，比如LS1C_SPI_0， LS1C_SPI_1
* @spi_bus_name 总线名字
* @ret
*/
rt_err_t ls1c_spi_bus_register(rt_uint8_t SPI, const char *spi_bus_name)
{
struct rt_spi_bus *spi_bus = NULL;
#ifdef RT_USING_SPI0
if (LS1C_SPI_0 == SPI)
{
spi_bus = &spi0_bus;
spi_bus->parent.user_data = &ls1c_spi0;
}
#endif
#ifdef RT_USING_SPI1
if (LS1C_SPI_1 == SPI)
{
spi_bus = &spi1_bus;
spi_bus->parent.user_data = &ls1c_spi1;
}
#endif
return rt_spi_bus_register(spi_bus, spi_bus_name, &ls1c_spi_ops);
}
bsp/ls1cdev/drivers/drv_spi.h 0 → 100644
浏览文件 @ 1bbe09df
/*
* File : drv_spi.h
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006 - 2012, RT-Thread Development Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Change Logs:
* Date Author Notes
* 2017-11-02 勤为本 first version
*/
#ifndef LS1C_DRV_SPI_H
#define LS1C_DRV_SPI_H
#include "../libraries/ls1c_spi.h"
struct ls1c_spi
{
unsigned char SPIx; // LS1C_SPI_0 or LS1C_SPI_1
};
struct ls1c_spi_cs
{
unsigned char cs; // LS1C_SPI_CS_0, LS1C_SPI_CS_1, LS1C_SPI_CS_2 or LS1C_SPI_CS_3
};
/*
* 初始化并注册龙芯1c的spi总线
* @SPI SPI总线，比如LS1C_SPI_0， LS1C_SPI_1
* @spi_bus_name 总线名字
* @ret
*/
rt_err_t ls1c_spi_bus_register(rt_uint8_t SPI, const char *spi_bus_name);
#endif
bsp/ls1cdev/drivers/led.c 已删除 100644 → 0
浏览文件 @ d6f80720
// led接口
// 使用低电平点亮led，高电平熄灭led
#include "ls1c_gpio.h"
// 初始化led
// @led_gpio led所在gpio引脚
void led_init(unsigned int led_gpio)
{
gpio_init(led_gpio, gpio_mode_output);
gpio_set(led_gpio, gpio_level_high); // 指示灯默认熄灭
return ;
}
// 点亮led
// @led_gpio led所在gpio引脚
void led_on(unsigned int led_gpio)
{
gpio_set(led_gpio, gpio_level_low);
return ;
}
// 熄灭led
// @led_gpio
void led_off(unsigned int led_gpio)
{
gpio_set(led_gpio, gpio_level_high);
return ;
}
bsp/ls1cdev/drivers/led.h 已删除 100644 → 0
浏览文件 @ d6f80720
// led接口
// 使用低电平点亮led，高电平熄灭led
#ifndef __OPENLOONGSON_LED_H
#define __OPENLOONGSON_LED_H
// 初始化led
// @led_gpio led所在gpio引脚
void led_init(unsigned int led_gpio);
// 点亮led
// @led_gpio led所在gpio引脚
void led_on(unsigned int led_gpio);
// 熄灭led
// @led_gpio
void led_off(unsigned int led_gpio);
#endif
bsp/ls1cdev/libraries/ls1c_spi.c
浏览文件 @ 1bbe09df
......@@ -32,53 +32,13 @@
#include "ls1c_spi.h"
// 寄存器偏移
#define LS1C_SPI_SPCR_OFFSET (0) // 控制寄存器
#define LS1C_SPI_SPSR_OFFSET (1) // 状态寄存器
#define LS1C_SPI_TxFIFO_OFFSET (2) // 发送的数据寄存器，与接收数据寄存器的偏移相同
#define LS1C_SPI_RxFIFO_OFFSET (2) // 接收的数据寄存器，与发送数据寄存器的偏移相同
#define LS1C_SPI_SPER_OFFSET (3) // 外部寄存器
#define LS1C_SPI_SFC_PARAM_OFFSET (4) // 参数控制寄存器
#define LS1C_SPI_SFC_SOFTCS_OFFSET (5) // 片选控制寄存器
#define LS1C_SPI_SFC_TIMING_OFFSET (6) // 时序控制寄存器
// 寄存器SPCR中的位域
#define LS1C_SPI_SPCR_SPIE_BIT (7)
#define LS1C_SPI_SPCR_SPIE_MASK (0x01 << LS1C_SPI_SPCR_SPIE_BIT)
#define LS1C_SPI_SPCR_SPE_BIT (6)
#define LS1C_SPI_SPCR_SPE_MASK (0x01 << LS1C_SPI_SPCR_SPE_BIT)
#define LS1C_SPI_SPCR_CPOL_BIT (3)
#define LS1C_SPI_SPCR_CPOL_MASK (0x01 << LS1C_SPI_SPCR_CPOL_BIT)
#define LS1C_SPI_SPCR_CPHA_BIT (2)
#define LS1C_SPI_SPCR_CPHA_MASK (0x01 << LS1C_SPI_SPCR_CPHA_BIT)
#define LS1C_SPI_SPCR_SPR_BIT (0)
#define LS1C_SPI_SPCR_SPR_MASK (0x03 << LS1C_SPI_SPCR_SPR_BIT)
// 寄存器SPSR中的位域
#define LS1C_SPI_SPSR_SPIF_BIT (7)
#define LS1C_SPI_SPSR_SPIF_MASK (0x01 << LS1C_SPI_SPSR_SPIF_BIT)
#define LS1C_SPI_SPSR_WCOL_BIT (6)
#define LS1C_SPI_SPSR_WCOL_MASK (0x01 << LS1C_SPI_SPSR_WCOL_BIT)
// 寄存器SPER中的位域
#define LS1C_SPI_SPER_SPRE_BIT (0)
#define LS1C_SPI_SPER_SPRE_MASK (0x3 << LS1C_SPI_SPER_SPRE_BIT)
// 寄存器SFC_SOFTCS的位域
#define LS1C_SPI_SFC_SOFTCS_CSN_BIT (4)
#define LS1C_SPI_SFC_SOFTCS_CSN_MASK (0x0f << LS1C_SPI_SFC_SOFTCS_CSN_BIT)
#define LS1C_SPI_SFC_SOFTCS_CSEN_BIT (0)
#define LS1C_SPI_SFC_SOFTCS_CSEN_MASK (0x0f << LS1C_SPI_SFC_SOFTCS_CSEN_BIT)
// 发送超时的门限值
#define LS1C_SPI_TX_TIMEOUT (20000)
/*
* 获取指定SPI模块的基地址
* @SPIx SPI模块的编号
*/
inline void *spi_get_base(ls1c_spi_t SPIx)
inline void *ls1c_spi_get_base(unsigned char SPIx)
{
void *base = NULL;
......@@ -103,15 +63,12 @@ inline void *spi_get_base(ls1c_spi_t SPIx)
/*
* 打印指定SPI模块的所有寄存器的值
* @spi_info_p SPI模块信息
* @spi_base 基地址
*/
void spi_print_all_regs_info(ls1c_spi_info_t *spi_info_p)
void ls1c_spi_print_all_regs_info(void *spi_base)
{
void *spi_base = spi_get_base(spi_info_p->SPIx);
rt_kprintf("[%s] SPI%d's info:\r\n\
SPCR=0x%x, SPSR=0x%x, SPER=0x%x, SFC_PARAM=0x%x, SFC_SOFTCS=0x%x, SFC_TIMING=0x%x\r\n",
__FUNCTION__, spi_info_p->SPIx,
rt_kprintf("[%s] SPCR=0x%x, SPSR=0x%x, SPER=0x%x, SFC_PARAM=0x%x, SFC_SOFTCS=0x%x, SFC_TIMING=0x%x\r\n",
__FUNCTION__,
reg_read_8(spi_base + LS1C_SPI_SPCR_OFFSET),
reg_read_8(spi_base + LS1C_SPI_SPSR_OFFSET),
reg_read_8(spi_base + LS1C_SPI_SPER_OFFSET),
......@@ -128,7 +85,7 @@ void spi_print_all_regs_info(ls1c_spi_info_t *spi_info_p)
* @max_speed_hz SPI最大通信速度
* @ret 分频系数
*/
unsigned int spi_get_div(unsigned int max_speed_hz)
unsigned int ls1c_spi_get_div(unsigned int max_speed_hz)
{
unsigned long clk = 0;
unsigned int div = 0;
......@@ -189,16 +146,16 @@ unsigned int spi_get_div(unsigned int max_speed_hz)
/*
* 设置时钟
* @spi_info_p SPI模块信息
* @spi_base 基地址
* @max_hz 最大频率，单位hz
*/
void spi_set_clock(ls1c_spi_info_t *spi_info_p)
void ls1c_spi_set_clock(void *spi_base, unsigned long max_hz)
{
void *spi_base = spi_get_base(spi_info_p->SPIx);
unsigned int div = 0;
unsigned char val = 0;
// 获取分频系数
div = spi_get_div(spi_info_p->max_speed_hz);
div = ls1c_spi_get_div(max_hz);
// 设置spr
val = reg_read_8(spi_base + LS1C_SPI_SPCR_OFFSET);
......@@ -218,22 +175,23 @@ void spi_set_clock(ls1c_spi_info_t *spi_info_p)
/*
* 设置通信模式(时钟极性和相位)
* @spi_info_p SPI模块信息
* @spi_base 基地址
* @cpol 时钟极性
* @cpha 时钟相位
*/
void spi_set_mode(ls1c_spi_info_t *spi_info_p)
void ls1c_spi_set_mode(void *spi_base, unsigned char cpol, unsigned char cpha)
{
void *spi_base = spi_get_base(spi_info_p->SPIx);
unsigned char val = 0;
val = reg_read_8(spi_base + LS1C_SPI_SPCR_OFFSET);
// 设置时钟极性--cpol
val &= (~LS1C_SPI_SPCR_CPOL_MASK); // cpol清0
val |= (spi_info_p->cpol << LS1C_SPI_SPCR_CPOL_BIT); // 写入新的cpol
val &= (~LS1C_SPI_SPCR_CPOL_MASK); // cpol清0
val |= (cpol << LS1C_SPI_SPCR_CPOL_BIT); // 写入新的cpol
// 设置时钟相位--cpha
val &= (~LS1C_SPI_SPCR_CPHA_MASK); // cpha清0
val |= (spi_info_p->cpha << LS1C_SPI_SPCR_CPHA_BIT); // 写入新的cpha
val &= (~LS1C_SPI_SPCR_CPHA_MASK); // cpha清0
val |= (cpha << LS1C_SPI_SPCR_CPHA_BIT); // 写入新的cpha
reg_write_8(val, spi_base + LS1C_SPI_SPCR_OFFSET);
......@@ -243,13 +201,12 @@ void spi_set_mode(ls1c_spi_info_t *spi_info_p)
/*
* 设置指定片选为指定状态
* @spi_info_p SPI模块信息
* @spi_base 基地址
* @cs 片选
* @new_status 片选引脚的新状态，取值为0或1，即高电平或低电平
*/
void spi_set_cs(ls1c_spi_info_t *spi_info_p, int new_status)
void ls1c_spi_set_cs(void *spi_base, unsigned char cs, int new_status)
{
void *spi_base = spi_get_base(spi_info_p->SPIx);
unsigned char cs = spi_info_p->cs;
unsigned char val = 0;
val = 0xf0 | (0x01 << cs); // 全部csn=1，指定的csen=1
......@@ -267,51 +224,12 @@ void spi_set_cs(ls1c_spi_info_t *spi_info_p, int new_status)
}
/*
* 初始化指定SPI模块
* @spi_info_p SPI模块信息
*/
void spi_init(ls1c_spi_info_t *spi_info_p)
{
void *spi_base = spi_get_base(spi_info_p->SPIx);
unsigned char val = 0;
// 使能SPI控制器，master模式，关闭中断
reg_write_8(0x53, spi_base + LS1C_SPI_SPCR_OFFSET);
// 清空状态寄存器
reg_write_8(0xc0, spi_base + LS1C_SPI_SPSR_OFFSET);
// 1字节产生中断，采样(读)与发送(写)时机同时
reg_write_8(0x03, spi_base + LS1C_SPI_SPER_OFFSET);
// 关闭SPI flash
val = reg_read_8(spi_base + LS1C_SPI_SFC_PARAM_OFFSET);
val &= 0xfe;
reg_write_8(val, spi_base + LS1C_SPI_SFC_PARAM_OFFSET);
// spi flash时序控制寄存器
reg_write_8(0x05, spi_base + LS1C_SPI_SFC_TIMING_OFFSET);
// 设置时钟
spi_set_clock(spi_info_p);
// 设置通信模式(时钟极性和相位)
spi_set_mode(spi_info_p);
// 打印寄存器信息(用于调试)
// spi_print_all_regs_info(spi_info_p);
return ;
}
/*
* 等待收发完成
* @spi_base 基地址
*/
inline void spi_wait_txrx_done(ls1c_spi_info_t *spi_info_p)
inline void ls1c_spi_wait_txrx_done(void *spi_base)
{
void *spi_base = spi_get_base(spi_info_p->SPIx);
int timeout = LS1C_SPI_TX_TIMEOUT;
while (timeout--)
......@@ -326,10 +244,10 @@ inline void spi_wait_txrx_done(ls1c_spi_info_t *spi_info_p)
/*
* 清中断和标志位
* @spi_base 基地址
*/
inline void spi_clear(ls1c_spi_info_t *spi_info_p)
inline void ls1c_spi_clear(void *spi_base)
{
void *spi_base = spi_get_base(spi_info_p->SPIx);
unsigned char val = 0;
// 清中断
......@@ -356,20 +274,19 @@ inline void spi_clear(ls1c_spi_info_t *spi_info_p)
* 注意，在多任务的系统中，此函数需要互斥。
* 即保证在和某个从设备收发某个字节的过程中，不能被切换到其它任务同时与另外的在同一个SPI总线上的从设备通信
* 因为龙芯1c的每路SPI上可能接有不同的从设备，通信频率、模式等可能不同
* @spi_info_p SPI接口
* @spi_base 基地址
* @tx_ch 待发送的数据
* @ret 收到的数据
*/
unsigned char spi_txrx_byte(ls1c_spi_info_t *spi_info_p, unsigned char tx_ch)
unsigned char ls1c_spi_txrx_byte(void *spi_base, unsigned char tx_ch)
{
void *spi_base = spi_get_base(spi_info_p->SPIx);
unsigned char rx_ch = 0;
// 收发数据
reg_write_8(tx_ch, spi_base + LS1C_SPI_TxFIFO_OFFSET); // 开始发送
spi_wait_txrx_done(spi_info_p); // 等待收发完成
ls1c_spi_wait_txrx_done(spi_base); // 等待收发完成
rx_ch = reg_read_8(spi_base + LS1C_SPI_RxFIFO_OFFSET); // 读取收到的数据
spi_clear(spi_info_p); // 清中断和标志位
ls1c_spi_clear(spi_base); // 清中断和标志位
return rx_ch;
}
......
bsp/ls1cdev/libraries/ls1c_spi.h
浏览文件 @ 1bbe09df
......@@ -29,15 +29,10 @@
// SPI模块编号
typedef enum
{
LS1C_SPI_0 = 0,
LS1C_SPI_1,
}ls1c_spi_t;
#define LS1C_SPI_0 (0)
#define LS1C_SPI_1 (1)
// 片选
#define LS1C_SPI_INVALID_CS (-1)
#define LS1C_SPI_CS_0 (0)
#define LS1C_SPI_CS_1 (1)
#define LS1C_SPI_CS_2 (2)
......@@ -50,31 +45,80 @@ typedef enum
#define SPI_CPHA_0 (0)
// 硬件SPI信息
typedef struct
{
ls1c_spi_t SPIx; // SPI模块编号
unsigned long max_speed_hz; // 最大通信速度，单位hz
unsigned char cs; // 片选
unsigned char cpol; // 时钟极性
unsigned char cpha; // 时钟相位
}ls1c_spi_info_t;
// 寄存器偏移
#define LS1C_SPI_SPCR_OFFSET (0) // 控制寄存器
#define LS1C_SPI_SPSR_OFFSET (1) // 状态寄存器
#define LS1C_SPI_TxFIFO_OFFSET (2) // 发送的数据寄存器，与接收数据寄存器的偏移相同
#define LS1C_SPI_RxFIFO_OFFSET (2) // 接收的数据寄存器，与发送数据寄存器的偏移相同
#define LS1C_SPI_SPER_OFFSET (3) // 外部寄存器
#define LS1C_SPI_SFC_PARAM_OFFSET (4) // 参数控制寄存器
#define LS1C_SPI_SFC_SOFTCS_OFFSET (5) // 片选控制寄存器
#define LS1C_SPI_SFC_TIMING_OFFSET (6) // 时序控制寄存器
// 寄存器SPCR中的位域
#define LS1C_SPI_SPCR_SPIE_BIT (7)
#define LS1C_SPI_SPCR_SPIE_MASK (0x01 << LS1C_SPI_SPCR_SPIE_BIT)
#define LS1C_SPI_SPCR_SPE_BIT (6)
#define LS1C_SPI_SPCR_SPE_MASK (0x01 << LS1C_SPI_SPCR_SPE_BIT)
#define LS1C_SPI_SPCR_CPOL_BIT (3)
#define LS1C_SPI_SPCR_CPOL_MASK (0x01 << LS1C_SPI_SPCR_CPOL_BIT)
#define LS1C_SPI_SPCR_CPHA_BIT (2)
#define LS1C_SPI_SPCR_CPHA_MASK (0x01 << LS1C_SPI_SPCR_CPHA_BIT)
#define LS1C_SPI_SPCR_SPR_BIT (0)
#define LS1C_SPI_SPCR_SPR_MASK (0x03 << LS1C_SPI_SPCR_SPR_BIT)
// 寄存器SPSR中的位域
#define LS1C_SPI_SPSR_SPIF_BIT (7)
#define LS1C_SPI_SPSR_SPIF_MASK (0x01 << LS1C_SPI_SPSR_SPIF_BIT)
#define LS1C_SPI_SPSR_WCOL_BIT (6)
#define LS1C_SPI_SPSR_WCOL_MASK (0x01 << LS1C_SPI_SPSR_WCOL_BIT)
// 寄存器SPER中的位域
#define LS1C_SPI_SPER_SPRE_BIT (0)
#define LS1C_SPI_SPER_SPRE_MASK (0x3 << LS1C_SPI_SPER_SPRE_BIT)
// 寄存器SFC_SOFTCS的位域
#define LS1C_SPI_SFC_SOFTCS_CSN_BIT (4)
#define LS1C_SPI_SFC_SOFTCS_CSN_MASK (0x0f << LS1C_SPI_SFC_SOFTCS_CSN_BIT)
#define LS1C_SPI_SFC_SOFTCS_CSEN_BIT (0)
#define LS1C_SPI_SFC_SOFTCS_CSEN_MASK (0x0f << LS1C_SPI_SFC_SOFTCS_CSEN_BIT)
// 发送超时的门限值
#define LS1C_SPI_TX_TIMEOUT (20000)
/*
* 获取指定SPI模块的基地址
* @SPIx SPI模块的编号
*/
inline void *ls1c_spi_get_base(unsigned char SPIx);
/*
* 初始化指定SPI模块
* @spi_info_p SPI模块信息
* 设置时钟
* @spi_base 基地址
* @max_hz 最大频率，单位hz
*/
void spi_init(ls1c_spi_info_t *spi_info_p);
void ls1c_spi_set_clock(void *spi_base, unsigned long max_hz);
/*
* 设置通信模式(时钟极性和相位)
* @spi_base 基地址
* @cpol 时钟极性
* @cpha 时钟相位
*/
void ls1c_spi_set_mode(void *spi_base, unsigned char cpol, unsigned char cpha);
/*
* 设置指定片选为指定状态
* @spi_info_p SPI模块信息
* @spi_base 基地址
* @cs 片选
* @new_status 片选引脚的新状态，取值为0或1，即高电平或低电平
*/
void spi_set_cs(ls1c_spi_info_t *spi_info_p, int new_status);
void ls1c_spi_set_cs(void *spi_base, unsigned char cs, int new_status);
/*
......@@ -82,18 +126,20 @@ void spi_set_cs(ls1c_spi_info_t *spi_info_p, int new_status);
* 注意，在多任务的系统中，此函数需要互斥。
* 即保证在和某个从设备收发某个字节的过程中，不能被切换到其它任务同时与另外的在同一个SPI总线上的从设备通信
* 因为龙芯1c的每路SPI上可能接有不同的从设备，通信频率、模式等可能不同
* @spi_info_p SPI接口
* @spi_base 基地址
* @tx_ch 待发送的数据
* @ret 收到的数据
*/
unsigned char spi_txrx_byte(ls1c_spi_info_t *spi_info_p, unsigned char tx_ch);
unsigned char ls1c_spi_txrx_byte(void *spi_base, unsigned char tx_ch);
/*
* 打印指定SPI模块的所有寄存器的值
* @spi_info_p SPI模块信息
* @spi_base 基地址
*/
void spi_print_all_regs_info(ls1c_spi_info_t *spi_info_p);
void ls1c_spi_print_all_regs_info(void *spi_base);
#endif
......
bsp/ls1cdev/rtconfig.h
浏览文件 @ 1bbe09df
......@@ -227,6 +227,11 @@
#define RTGUI_IMAGE_BMP
// </section>
#define RT_USING_SPI
#define RT_USING_SPI0
#define RT_USING_SPI1
// </RDTConfigurator>
#endif
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