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[ch32v307v-r1] 添加了模拟iic驱动 (#6447)

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hg0720 2022-09-19 22:33:55 +08:00 committed by GitHub
parent 4b897fea3f
commit 90d9b449b1
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5 changed files with 311 additions and 0 deletions
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4
bsp/wch/risc-v/Libraries/ch32_drivers/SConscript
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@ -22,6 +22,10 @@ if GetDepend('SOC_RISCV_FAMILY_CH32'):
if GetDepend(['BSP_USING_DAC']):
src += ['drv_dac.c']
if GetDepend(['RT_USING_I2C', 'RT_USING_I2C_BITOPS']):
if GetDepend('BSP_USING_I2C1') or GetDepend('BSP_USING_I2C2'):
src += ['drv_soft_i2c.c']
path = [cwd]
group = DefineGroup('Drivers', src, depend = [''], CPPPATH = path)

2
bsp/wch/risc-v/Libraries/ch32_drivers/drv_adc.c
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@ -148,9 +148,11 @@ static rt_uint32_t ch32_adc_get_channel(rt_uint32_t channel)
ch32_channel = ADC_Channel_17;
break;
#endif /* ADC_CHANNEL_17 */
#ifdef ADC_CHANNEL_18
case 18:
ch32_channel = ADC_Channel_18;
break;
#endif /* ADC_CHANNEL_18 */
#ifdef ADC_CHANNEL_19
case 19:
ch32_channel = ADC_Channel_19;

214
bsp/wch/risc-v/Libraries/ch32_drivers/drv_soft_i2c.c Normal file
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@ -0,0 +1,214 @@
/*
* Copyright (c) 2006-2022, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2022-09-19 hg0720 the first version which add from wch
*/
#include <board.h>
#include "drv_soft_i2c.h"
#ifdef RT_USING_I2C
//#define DRV_DEBUG
#define LOG_TAG "drv.i2c"
#include <drv_log.h>
#if !defined(BSP_USING_I2C1) && !defined(BSP_USING_I2C2)
#error "Please define at least one BSP_USING_I2Cx"
/* this driver can be disabled at menuconfig -> RT-Thread Components -> Device Drivers */
#endif
static const struct ch32_soft_i2c_config soft_i2c_config[] =
{
#ifdef BSP_USING_I2C1
I2C1_BUS_CONFIG,
#endif
#ifdef BSP_USING_I2C2
I2C2_BUS_CONFIG,
#endif
};
static struct ch32_i2c i2c_obj[sizeof(soft_i2c_config) / sizeof(soft_i2c_config[0])];
/*
* This function initializes the i2c pin.
*
* @param ch32 i2c dirver class.
*/
static void ch32_i2c_gpio_init(struct ch32_i2c *i2c)
{
struct ch32_soft_i2c_config* cfg = (struct ch32_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 Ch32 config class.
* @param The sda pin state.
*/
static void ch32_set_sda(void *data, rt_int32_t state)
{
struct ch32_soft_i2c_config* cfg = (struct ch32_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 Ch32 config class.
* @param The scl pin state.
*/
static void ch32_set_scl(void *data, rt_int32_t state)
{
struct ch32_soft_i2c_config* cfg = (struct ch32_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 ch32_get_sda(void *data)
{
struct ch32_soft_i2c_config* cfg = (struct ch32_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 ch32_get_scl(void *data)
{
struct ch32_soft_i2c_config* cfg = (struct ch32_soft_i2c_config*)data;
return rt_pin_read(cfg->scl);
}
/*
* The time delay function.
*
* @param microseconds.
*/
static void ch32_udelay(rt_uint32_t us)
{
rt_uint32_t ticks;
rt_uint32_t told, tnow, tcnt = 0;
rt_uint32_t reload = SysTick->CMP;
ticks = us * reload / (1000000 / RT_TICK_PER_SECOND);
told = SysTick->CNT;
while (1)
{
tnow = SysTick->CNT;
if (tnow != told)
{
if (tnow > told)
{
tcnt += tnow - told;
}
else
{
tcnt += reload - told + tnow;
}
told = tnow;
if (tcnt >= ticks)
{
break;
}
}
}
}
static const struct rt_i2c_bit_ops ch32_bit_ops_default =
{
.data = RT_NULL,
.set_sda = ch32_set_sda,
.set_scl = ch32_set_scl,
.get_sda = ch32_get_sda,
.get_scl = ch32_get_scl,
.udelay = ch32_udelay,
.delay_us = 1,
.timeout = 100
};
/*
* if i2c is locked, this function will unlock it
*
* @param ch32 config class
*
* @return RT_EOK indicates successful unlock.
*/
static rt_err_t ch32_i2c_bus_unlock(const struct ch32_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);
ch32_udelay(100);
rt_pin_write(cfg->scl, PIN_LOW);
ch32_udelay(100);
}
}
if (PIN_LOW == rt_pin_read(cfg->sda))
{
return -RT_ERROR;
}
return RT_EOK;
}
/* I2C initialization function */
int rt_hw_i2c_init(void)
{
rt_size_t obj_num = sizeof(i2c_obj) / sizeof(struct ch32_i2c);
rt_err_t result;
for (int i = 0; i < obj_num; i++)
{
i2c_obj[i].ops = ch32_bit_ops_default;
i2c_obj[i].ops.data = (void*)&soft_i2c_config[i];
i2c_obj[i].i2c2_bus.priv = &i2c_obj[i].ops;
ch32_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);
ch32_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_BOARD_EXPORT(rt_hw_i2c_init);
#endif /* RT_USING_I2C */

53
bsp/wch/risc-v/Libraries/ch32_drivers/drv_soft_i2c.h Normal file
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@ -0,0 +1,53 @@
/*
* Copyright (c) 2006-2022, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2022-09-19 hg0720 the first version which add from wch
*/
#ifndef __DRV_I2C__
#define __DRV_I2C__
#include <rtthread.h>
#include <rthw.h>
#include <rtdevice.h>
/* ch32 config class */
struct ch32_soft_i2c_config
{
rt_uint8_t scl;
rt_uint8_t sda;
const char *bus_name;
};
/* ch32 i2c dirver class */
struct ch32_i2c
{
struct rt_i2c_bit_ops ops;
struct rt_i2c_bus_device i2c2_bus;
};
#ifdef BSP_USING_I2C1
#define I2C1_BUS_CONFIG \
{ \
.scl = BSP_I2C1_SCL_PIN, \
.sda = BSP_I2C1_SDA_PIN, \
.bus_name = "i2c1", \
}
#endif
#ifdef BSP_USING_I2C2
#define I2C2_BUS_CONFIG \
{ \
.scl = BSP_I2C2_SCL_PIN, \
.sda = BSP_I2C2_SDA_PIN, \
.bus_name = "i2c2", \
}
#endif
int rt_hw_i2c_init(void);
#endif

38
bsp/wch/risc-v/ch32v307v-r1/board/Kconfig
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@ -84,6 +84,44 @@ menu "On-chip Peripheral Drivers"
default n
endif
menuconfig BSP_USING_I2C
bool "Enable I2C Bus"
default n
select RT_USING_I2C
select RT_USING_I2C_BITOPS
select RT_USING_PIN
if BSP_USING_I2C
config BSP_USING_I2C1
bool "Enable I2C1 Bus"
default n
if BSP_USING_I2C1
comment "Notice: PC7 --> 39; PC6 --> 38"
config BSP_I2C1_SCL_PIN
int "i2c1 SCL pin number"
range 0 79
default 38
config BSP_I2C1_SDA_PIN
int "i2c1 SDA pin number"
range 0 79
default 39
endif
config BSP_USING_I2C2
bool "Enable I2C2 Bus"
default n
if BSP_USING_I2C2
comment "Notice: PC1 --> 33; PC0 --> 32"
config BSP_I2C2_SCL_PIN
int "i2c2 SCL pin number"
range 0 79
default 32
config BSP_I2C2_SDA_PIN
int "i2c2 SDA pin number"
range 0 79
default 33
endif
endif
endmenu
menu "Onboard Peripheral Drivers"