diff --git a/bsp/bl808/README.md b/bsp/bl808/README.md index 0007f508f3..9a609207ec 100644 --- a/bsp/bl808/README.md +++ b/bsp/bl808/README.md @@ -100,6 +100,7 @@ Windows下推荐使用[env工具][1]，在console下进入bsp/bl808目录中， | ------ | ---- | :------: | | UART | 支持 | UART0，用于shell，默认波特率2000000 | | GPIO | 支持 | | +| I2C | 支持 | 软件 I2C1，默认 SCL——20，SDA——21 | ## 5. 联系人信息 diff --git a/bsp/bl808/m0/drivers/Kconfig b/bsp/bl808/m0/drivers/Kconfig index eca0033e7b..ac17b47215 100644 --- a/bsp/bl808/m0/drivers/Kconfig +++ b/bsp/bl808/m0/drivers/Kconfig @@ -18,6 +18,23 @@ menu "On-chip Peripheral Drivers" select RT_USING_PIN default y + menuconfig BSP_USING_I2C1 + bool "Enable I2C1 BUS (software simulation)" + default n + select RT_USING_I2C + select RT_USING_I2C_BITOPS + select RT_USING_PIN + if BSP_USING_I2C1 + config BSP_I2C1_SCL_PIN + int "i2c1 scl pin number" + range 0 33 + default 20 + config BSP_I2C1_SDA_PIN + int "I2C1 sda pin number" + range 0 33 + default 21 + endif + menuconfig BSP_USING_UART bool "Enable UART" default y diff --git a/bsp/bl808/m0/drivers/SConscript b/bsp/bl808/m0/drivers/SConscript index 503dd50f4c..3cd7a608dd 100644 --- a/bsp/bl808/m0/drivers/SConscript +++ b/bsp/bl808/m0/drivers/SConscript @@ -18,6 +18,9 @@ if GetDepend(['RT_USING_SERIAL']): if GetDepend('RT_USING_PIN'): src += ['drv_gpio.c'] +if GetDepend('RT_USING_I2C'): + src += ['drv_i2c.c'] + # if GetDepend('BSP_USING_LCD'): # src += ['drv_lcd.c'] # src += ['drv_mpylcd.c'] @@ -28,9 +31,6 @@ if GetDepend('RT_USING_PIN'): # if GetDepend('RT_USING_CPUTIME'): # src += ['drv_cputime.c'] -# if GetDepend('RT_USING_I2C'): -# src += ['drv_i2c.c'] - # if GetDepend('RT_USING_SPI'): # src += ['drv_spi.c'] diff --git a/bsp/bl808/m0/drivers/board.c b/bsp/bl808/m0/drivers/board.c index 525488eaec..a5c823ac8d 100644 --- a/bsp/bl808/m0/drivers/board.c +++ b/bsp/bl808/m0/drivers/board.c @@ -6,6 +6,7 @@ * Change Logs: * Date Author Notes * 2022/12/25 flyingcys first version + * 2023/01/17 chushicheng add pin and i2c */ #include #include @@ -81,6 +82,11 @@ void rt_hw_board_init(void) rt_hw_pin_init(); #endif + /* I2C driver initialization is open by default */ +#ifdef RT_USING_I2C + rt_hw_i2c_init(); +#endif + /* UART driver initialization is open by default */ #ifdef RT_USING_SERIAL rt_hw_uart_init(); diff --git a/bsp/bl808/m0/drivers/drv_i2c.c b/bsp/bl808/m0/drivers/drv_i2c.c new file mode 100644 index 0000000000..b69c6e623f --- /dev/null +++ b/bsp/bl808/m0/drivers/drv_i2c.c @@ -0,0 +1,186 @@ +/* + * Copyright (c) 2006-2023, RT-Thread Development Team + * + * SPDX-License-Identifier: Apache-2.0 + * + * Change Logs: + * Date Author Notes + * 2023/01/17 chushicheng first version + */ + +#include +#include "drv_i2c.h" +#include "bl808_common.h" + +#ifdef RT_USING_I2C + +#define DBG_TAG "drv.i2c" +#define DBG_LVL DBG_INFO +#include + +#if !defined(BSP_USING_I2C1) +#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 bl808_soft_i2c_config soft_i2c_config[] = +{ +#ifdef BSP_USING_I2C1 + I2C1_BUS_CONFIG, +#endif +}; + +static struct bl808_i2c i2c_obj[sizeof(soft_i2c_config) / sizeof(soft_i2c_config[0])]; + +/** + * This function initializes the i2c pin. + * + * @param bl808 i2c dirver class. + */ +static void bl808_i2c_gpio_init(struct bl808_i2c *i2c) +{ + struct bl808_soft_i2c_config* cfg = (struct bl808_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 bl808 config class. + * @param The sda pin state. + */ +static void bl808_set_sda(void *data, rt_int32_t state) +{ + struct bl808_soft_i2c_config* cfg = (struct bl808_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 bl808 config class. + * @param The scl pin state. + */ +static void bl808_set_scl(void *data, rt_int32_t state) +{ + struct bl808_soft_i2c_config* cfg = (struct bl808_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 bl808_get_sda(void *data) +{ + struct bl808_soft_i2c_config* cfg = (struct bl808_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 bl808_get_scl(void *data) +{ + struct bl808_soft_i2c_config* cfg = (struct bl808_soft_i2c_config*)data; + return rt_pin_read(cfg->scl); +} +/** + * The time delay function. + * + * @param microseconds. + */ +static void bl808_udelay(rt_uint32_t us) +{ + arch_delay_us(us); +} + +static const struct rt_i2c_bit_ops bl808_bit_ops_default = +{ + .data = RT_NULL, + .set_sda = bl808_set_sda, + .set_scl = bl808_set_scl, + .get_sda = bl808_get_sda, + .get_scl = bl808_get_scl, + .udelay = bl808_udelay, + .delay_us = 1, + .timeout = 100 +}; + +/** + * if i2c is locked, this function will unlock it + * + * @param bl808 config class + * + * @return RT_EOK indicates successful unlock. + */ +static rt_err_t bl808_i2c_bus_unlock(const struct bl808_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); + bl808_udelay(100); + rt_pin_write(cfg->scl, PIN_LOW); + bl808_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_err_t result; + + for (rt_size_t i = 0; i < sizeof(i2c_obj) / sizeof(struct bl808_i2c); i++) + { + i2c_obj[i].ops = bl808_bit_ops_default; + i2c_obj[i].ops.data = (void*)&soft_i2c_config[i]; + i2c_obj[i].i2c2_bus.priv = &i2c_obj[i].ops; + bl808_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); + bl808_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 */ diff --git a/bsp/bl808/m0/drivers/drv_i2c.h b/bsp/bl808/m0/drivers/drv_i2c.h new file mode 100644 index 0000000000..4add722a00 --- /dev/null +++ b/bsp/bl808/m0/drivers/drv_i2c.h @@ -0,0 +1,43 @@ +/* + * Copyright (c) 2006-2023, RT-Thread Development Team + * + * SPDX-License-Identifier: Apache-2.0 + * + * Change Logs: + * Date Author Notes + * 2023/01/17 chushicheng first version + */ + +#ifndef __DRV_I2C__ +#define __DRV_I2C__ + +#include +#include +#include + +/* bl808 config class */ +struct bl808_soft_i2c_config +{ + rt_uint8_t scl; + rt_uint8_t sda; + const char *bus_name; +}; +/* bl808 i2c dirver class */ +struct bl808_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 + +int rt_hw_i2c_init(void); + +#endif