diff --git a/bsp/raspberry-pico/drivers/drv_soft_i2c.c b/bsp/raspberry-pico/drivers/drv_soft_i2c.c new file mode 100644 index 0000000000000000000000000000000000000000..f1e33de19ab8dcb4912137d0799c303414e39d37 --- /dev/null +++ b/bsp/raspberry-pico/drivers/drv_soft_i2c.c @@ -0,0 +1,177 @@ +/* + * 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 +#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 */ diff --git a/bsp/raspberry-pico/drivers/drv_soft_i2c.h b/bsp/raspberry-pico/drivers/drv_soft_i2c.h new file mode 100644 index 0000000000000000000000000000000000000000..d32617a8db2a602a688e6d7ed6bc67bc46e3d610 --- /dev/null +++ b/bsp/raspberry-pico/drivers/drv_soft_i2c.h @@ -0,0 +1,46 @@ +/* + * 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 +#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 diff --git a/bsp/raspberry-pico/libraries/Kconfig b/bsp/raspberry-pico/libraries/Kconfig index 4aea48c614d7158a90a58d5cb36c251ae691c2b5..991f25642d502c72293c54235fe966fffefc6b77 100644 --- a/bsp/raspberry-pico/libraries/Kconfig +++ b/bsp/raspberry-pico/libraries/Kconfig @@ -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