diff options
| -rw-r--r-- | bsp/ra6m4-cpk/.config | 9 | ||||
| -rw-r--r-- | bsp/ra6m4-cpk/drivers/Kconfig | 22 | ||||
| -rw-r--r-- | bsp/ra6m4-cpk/drivers/drv_soft_i2c.c | 218 | ||||
| -rw-r--r-- | bsp/ra6m4-cpk/drivers/drv_soft_i2c.h | 53 |
4 files changed, 300 insertions, 2 deletions
diff --git a/bsp/ra6m4-cpk/.config b/bsp/ra6m4-cpk/.config index 0531fd135e..f40cd8d190 100644 --- a/bsp/ra6m4-cpk/.config +++ b/bsp/ra6m4-cpk/.config @@ -132,7 +132,10 @@ CONFIG_RT_SERIAL_USING_DMA=y # CONFIG_RT_USING_CAN is not set # CONFIG_RT_USING_HWTIMER is not set # CONFIG_RT_USING_CPUTIME is not set -# CONFIG_RT_USING_I2C is not set +CONFIG_RT_USING_I2C=y +# CONFIG_RT_I2C_DEBUG is not set +CONFIG_RT_USING_I2C_BITOPS=y +# CONFIG_RT_I2C_BITOPS_DEBUG is not set # CONFIG_RT_USING_PHY is not set CONFIG_RT_USING_PIN=y # CONFIG_RT_USING_ADC is not set @@ -580,6 +583,10 @@ CONFIG_BSP_USING_UART7=y # CONFIG_BSP_UART7_TX_USING_DMA is not set CONFIG_BSP_UART7_RX_BUFSIZE=256 CONFIG_BSP_UART7_TX_BUFSIZE=0 +CONFIG_BSP_USING_I2C=y +CONFIG_BSP_USING_I2C1=y +CONFIG_BSP_I2C1_SCL_PIN=0x0512 +CONFIG_BSP_I2C1_SDA_PIN=0x0511 # # Board extended module Drivers diff --git a/bsp/ra6m4-cpk/drivers/Kconfig b/bsp/ra6m4-cpk/drivers/Kconfig index 7cdb2b98a2..17e127473d 100644 --- a/bsp/ra6m4-cpk/drivers/Kconfig +++ b/bsp/ra6m4-cpk/drivers/Kconfig @@ -51,7 +51,27 @@ menu "Hardware Drivers Config" endif 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 + menuconfig BSP_USING_I2C1 + bool "Enable I2C1 BUS (software simulation)" + default y + if BSP_USING_I2C1 + config BSP_I2C1_SCL_PIN + int "i2c1 scl pin number" + range 0x0000 0x0B0F + default 0x0512 + config BSP_I2C1_SDA_PIN + int "I2C1 sda pin number" + range 0x0000 0x0B0F + default 0x0511 + endif + endif endmenu diff --git a/bsp/ra6m4-cpk/drivers/drv_soft_i2c.c b/bsp/ra6m4-cpk/drivers/drv_soft_i2c.c new file mode 100644 index 0000000000..323777a8d6 --- /dev/null +++ b/bsp/ra6m4-cpk/drivers/drv_soft_i2c.c @@ -0,0 +1,218 @@ +/* + * Copyright (c) 2006-2021, RT-Thread Development Team + * + * SPDX-License-Identifier: Apache-2.0 + * + * Change Logs: + * Date Author Notes + * 2021-07-29 KyleChan first version + */ + +#include "board.h" +#include "drv_soft_i2c.h" +#include "drv_config.h" + +#ifdef RT_USING_I2C + +#define DBG_TAG "drv.i2c" +#ifdef DRV_DEBUG +#define DBG_LVL DBG_LOG +#else +#define DBG_LVL DBG_INFO +#endif /* DRV_DEBUG */ + +#if !defined(BSP_USING_I2C0) && !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 ra_soft_i2c_config soft_i2c_config[] = +{ +#ifdef BSP_USING_I2C0 + I2C0_BUS_CONFIG, +#endif +#ifdef BSP_USING_I2C1 + I2C1_BUS_CONFIG, +#endif +}; + +static struct ra_i2c i2c_obj[sizeof(soft_i2c_config) / sizeof(soft_i2c_config[0])]; + +/** + * This function initializes the i2c pin. + * + * @param ra i2c dirver class. + */ +static void ra_i2c_gpio_init(struct ra_i2c *i2c) +{ + struct ra_soft_i2c_config* cfg = (struct ra_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 ra config class. + * @param The sda pin state. + */ +static void ra_set_sda(void *data, rt_int32_t state) +{ + struct ra_soft_i2c_config* cfg = (struct ra_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 ra config class. + * @param The scl pin state. + */ +static void ra_set_scl(void *data, rt_int32_t state) +{ + struct ra_soft_i2c_config* cfg = (struct ra_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 ra_get_sda(void *data) +{ + struct ra_soft_i2c_config* cfg = (struct ra_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 ra_get_scl(void *data) +{ + struct ra_soft_i2c_config* cfg = (struct ra_soft_i2c_config*)data; + return rt_pin_read(cfg->scl); +} +/** + * The time delay function. + * + * @param microseconds. + */ +static void ra_udelay(rt_uint32_t us) +{ + rt_uint32_t ticks; + rt_uint32_t told, tnow, tcnt = 0; + rt_uint32_t reload = SysTick->LOAD; + + ticks = us * reload / (1000000 / RT_TICK_PER_SECOND); + told = SysTick->VAL; + while (1) + { + tnow = SysTick->VAL; + if (tnow != told) + { + if (tnow < told) + { + tcnt += told - tnow; + } + else + { + tcnt += reload - tnow + told; + } + told = tnow; + if (tcnt >= ticks) + { + break; + } + } + } +} + +static const struct rt_i2c_bit_ops ra_bit_ops_default = +{ + .data = RT_NULL, + .set_sda = ra_set_sda, + .set_scl = ra_set_scl, + .get_sda = ra_get_sda, + .get_scl = ra_get_scl, + .udelay = ra_udelay, + .delay_us = 1, + .timeout = 100 +}; + +/** + * if i2c is locked, this function will unlock it + * + * @param ra config class + * + * @return RT_EOK indicates successful unlock. + */ +static rt_err_t ra_i2c_bus_unlock(const struct ra_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); + ra_udelay(100); + rt_pin_write(cfg->scl, PIN_LOW); + ra_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 ra_i2c); + rt_err_t result; + + for (int i = 0; i < obj_num; i++) + { + i2c_obj[i].ops = ra_bit_ops_default; + i2c_obj[i].ops.data = (void*)&soft_i2c_config[i]; + i2c_obj[i].i2c2_bus.priv = &i2c_obj[i].ops; + ra_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); + ra_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/ra6m4-cpk/drivers/drv_soft_i2c.h b/bsp/ra6m4-cpk/drivers/drv_soft_i2c.h new file mode 100644 index 0000000000..098810b433 --- /dev/null +++ b/bsp/ra6m4-cpk/drivers/drv_soft_i2c.h @@ -0,0 +1,53 @@ +/* + * Copyright (c) 2006-2021, RT-Thread Development Team + * + * SPDX-License-Identifier: Apache-2.0 + * + * Change Logs: + * Date Author Notes + * 2021-07-29 KyleChan first version + */ + +#ifndef __DRV_I2C__ +#define __DRV_I2C__ + +#include <rtthread.h> +#include <rthw.h> +#include <rtdevice.h> +#include <rtdbg.h> + +/* ra config class */ +struct ra_soft_i2c_config +{ + rt_uint32_t scl; + rt_uint32_t sda; + const char *bus_name; +}; +/* ra i2c dirver class */ +struct ra_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 |