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前往新版Gitcode,体验更适合开发者的 AI 搜索 >>
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761a28e4
编写于
6月 01, 2023
作者:
褚
褚仕成
提交者:
Thomas_Fly
6月 02, 2023
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差异文件
[bsp][pico]add: drv_soft_i2c
上级
e88a1946
变更
3
隐藏空白更改
内联
并排
Showing
3 changed file
with
248 addition
and
0 deletion
+248
-0
bsp/raspberry-pico/drivers/drv_soft_i2c.c
bsp/raspberry-pico/drivers/drv_soft_i2c.c
+177
-0
bsp/raspberry-pico/drivers/drv_soft_i2c.h
bsp/raspberry-pico/drivers/drv_soft_i2c.h
+46
-0
bsp/raspberry-pico/libraries/Kconfig
bsp/raspberry-pico/libraries/Kconfig
+25
-0
未找到文件。
bsp/raspberry-pico/drivers/drv_soft_i2c.c
0 → 100644
浏览文件 @
761a28e4
/*
* Copyright (c) 2006-2023, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2023/06/01 chushicheng first version
*/
#include "drv_soft_i2c.h"
#ifdef BSP_USING_SOFT_I2C
#define DBG_LEVEL DBG_LOG
#include <rtdbg.h>
#define LOG_TAG "DRV.I2C"
static
const
struct
pico_soft_i2c_config
soft_i2c_config
[]
=
{
#ifdef BSP_USING_SOFT_I2C1
I2C1_BUS_CONFIG
,
#endif
};
static
struct
pico_i2c
i2c_obj
[
sizeof
(
soft_i2c_config
)
/
sizeof
(
soft_i2c_config
[
0
])];
/**
* This function initializes the i2c pin.
*
* @param pico i2c dirver class.
*/
static
void
pico_i2c_gpio_init
(
struct
pico_i2c
*
i2c
)
{
struct
pico_soft_i2c_config
*
cfg
=
(
struct
pico_soft_i2c_config
*
)
i2c
->
ops
.
data
;
rt_pin_mode
(
cfg
->
scl
,
PIN_MODE_OUTPUT_OD
);
rt_pin_mode
(
cfg
->
sda
,
PIN_MODE_OUTPUT_OD
);
rt_pin_write
(
cfg
->
scl
,
PIN_HIGH
);
rt_pin_write
(
cfg
->
sda
,
PIN_HIGH
);
}
/**
* This function sets the sda pin.
*
* @param pico config class.
* @param The sda pin state.
*/
static
void
pico_set_sda
(
void
*
data
,
rt_int32_t
state
)
{
struct
pico_soft_i2c_config
*
cfg
=
(
struct
pico_soft_i2c_config
*
)
data
;
if
(
state
)
{
rt_pin_write
(
cfg
->
sda
,
PIN_HIGH
);
}
else
{
rt_pin_write
(
cfg
->
sda
,
PIN_LOW
);
}
}
/**
* This function sets the scl pin.
*
* @param pico config class.
* @param The scl pin state.
*/
static
void
pico_set_scl
(
void
*
data
,
rt_int32_t
state
)
{
struct
pico_soft_i2c_config
*
cfg
=
(
struct
pico_soft_i2c_config
*
)
data
;
if
(
state
)
{
rt_pin_write
(
cfg
->
scl
,
PIN_HIGH
);
}
else
{
rt_pin_write
(
cfg
->
scl
,
PIN_LOW
);
}
}
/**
* This function gets the sda pin state.
*
* @param The sda pin state.
*/
static
rt_int32_t
pico_get_sda
(
void
*
data
)
{
struct
pico_soft_i2c_config
*
cfg
=
(
struct
pico_soft_i2c_config
*
)
data
;
return
rt_pin_read
(
cfg
->
sda
);
}
/**
* This function gets the scl pin state.
*
* @param The scl pin state.
*/
static
rt_int32_t
pico_get_scl
(
void
*
data
)
{
struct
pico_soft_i2c_config
*
cfg
=
(
struct
pico_soft_i2c_config
*
)
data
;
return
rt_pin_read
(
cfg
->
scl
);
}
/**
* The time delay function.
*
* @param microseconds.
*/
static
void
pico_udelay
(
rt_uint32_t
us
)
{
busy_wait_us_32
(
us
);
}
static
const
struct
rt_i2c_bit_ops
pico_bit_ops_default
=
{
.
data
=
RT_NULL
,
.
set_sda
=
pico_set_sda
,
.
set_scl
=
pico_set_scl
,
.
get_sda
=
pico_get_sda
,
.
get_scl
=
pico_get_scl
,
.
udelay
=
pico_udelay
,
.
delay_us
=
1
,
.
timeout
=
100
};
/**
* if i2c is locked, this function will unlock it
*
* @param pico config class
*
* @return RT_EOK indicates successful unlock.
*/
static
rt_err_t
pico_i2c_bus_unlock
(
const
struct
pico_soft_i2c_config
*
cfg
)
{
rt_int32_t
i
=
0
;
if
(
PIN_LOW
==
rt_pin_read
(
cfg
->
sda
))
{
while
(
i
++
<
9
)
{
rt_pin_write
(
cfg
->
scl
,
PIN_HIGH
);
pico_udelay
(
100
);
rt_pin_write
(
cfg
->
scl
,
PIN_LOW
);
pico_udelay
(
100
);
}
}
if
(
PIN_LOW
==
rt_pin_read
(
cfg
->
sda
))
{
return
-
RT_ERROR
;
}
return
RT_EOK
;
}
/* I2C initialization function */
int
rt_soft_i2c_init
(
void
)
{
rt_err_t
result
;
for
(
rt_size_t
i
=
0
;
i
<
sizeof
(
i2c_obj
)
/
sizeof
(
struct
pico_i2c
);
i
++
)
{
i2c_obj
[
i
].
ops
=
pico_bit_ops_default
;
i2c_obj
[
i
].
ops
.
data
=
(
void
*
)
&
soft_i2c_config
[
i
];
i2c_obj
[
i
].
i2c2_bus
.
priv
=
&
i2c_obj
[
i
].
ops
;
pico_i2c_gpio_init
(
&
i2c_obj
[
i
]);
result
=
rt_i2c_bit_add_bus
(
&
i2c_obj
[
i
].
i2c2_bus
,
soft_i2c_config
[
i
].
bus_name
);
RT_ASSERT
(
result
==
RT_EOK
);
pico_i2c_bus_unlock
(
&
soft_i2c_config
[
i
]);
LOG_D
(
"software simulation %s init done, pin scl: %d, pin sda %d"
,
soft_i2c_config
[
i
].
bus_name
,
soft_i2c_config
[
i
].
scl
,
soft_i2c_config
[
i
].
sda
);
}
return
RT_EOK
;
}
INIT_DEVICE_EXPORT
(
rt_soft_i2c_init
);
#endif
/* BSP_USING_SOFT_I2C */
bsp/raspberry-pico/drivers/drv_soft_i2c.h
0 → 100644
浏览文件 @
761a28e4
/*
* Copyright (c) 2006-2023, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2023/06/01 chushicheng first version
*/
#ifndef __DRV_SOFT_I2C__
#define __DRV_SOFT_I2C__
#include <rtdevice.h>
#include "drv_gpio.h"
#include "board.h"
#ifdef BSP_USING_SOFT_I2C
/* pico i2c dirver class */
struct
pico_i2c
{
struct
rt_i2c_bit_ops
ops
;
struct
rt_i2c_bus_device
i2c2_bus
;
};
/* pico config class */
struct
pico_soft_i2c_config
{
rt_uint8_t
scl
;
rt_uint8_t
sda
;
const
char
*
bus_name
;
};
#ifdef BSP_USING_SOFT_I2C1
#define I2C1_BUS_CONFIG \
{ \
.scl = BSP_SOFT_I2C1_SCL_PIN, \
.sda = BSP_SOFT_I2C1_SDA_PIN, \
.bus_name = "i2c1", \
}
#endif
int
rt_soft_i2c_init
(
void
);
#endif
/* BSP_USING_SOFT_I2C */
#endif
bsp/raspberry-pico/libraries/Kconfig
浏览文件 @
761a28e4
...
...
@@ -22,4 +22,29 @@ menu "Onboard Peripheral Drivers"
endif
endmenu
menu "On-chip Peripheral Drivers"
menuconfig BSP_USING_SOFT_I2C
bool "Enable I2C BUS (software simulation)"
default n
select RT_USING_I2C
select RT_USING_I2C_BITOPS
select RT_USING_PIN
if BSP_USING_SOFT_I2C
config BSP_USING_SOFT_I2C1
bool "Enable I2C1 Bus (software simulation)"
default n
if BSP_USING_SOFT_I2C1
config BSP_SOFT_I2C1_SCL_PIN
int "i2c1 scl pin number (GP)"
range 0 28
default 2
config BSP_SOFT_I2C1_SDA_PIN
int "I2C1 sda pin number (GP)"
range 0 28
default 3
endif
endif
endmenu
endmenu
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