320 lines
9.2 KiB
C
320 lines
9.2 KiB
C
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/*
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* Copyright (C) 2022, Xiaohua Semiconductor Co., Ltd.
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2022-04-28 CDT first version
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*/
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#include <rtthread.h>
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#include <rtdevice.h>
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#include <rtdbg.h>
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#ifdef BSP_USING_TCA9539
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#include "tca9539.h"
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/*******************************************************************************
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* Local type definitions ('typedef')
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******************************************************************************/
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/*******************************************************************************
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* Local pre-processor symbols/macros ('#define')
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******************************************************************************/
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/* Define for TCA9539 */
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#define BSP_TCA9539_I2C_BUS_NAME "i2c1"
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#define BSP_TCA9539_DEV_ADDR (0x74U)
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#define TCA9539_RST_PIN (45) /* PC13 */
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/*******************************************************************************
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* Global variable definitions (declared in header file with 'extern')
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******************************************************************************/
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/*******************************************************************************
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* Local function prototypes ('static')
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******************************************************************************/
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/*******************************************************************************
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* Local variable definitions ('static')
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******************************************************************************/
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static struct rt_i2c_bus_device *i2c_bus = RT_NULL;
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/*******************************************************************************
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* Function implementation - global ('extern') and local ('static')
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******************************************************************************/
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/**
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* @brief BSP TCA9539 write data.
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* @param [in] bus: Pointer to the i2c bus device.
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* @param [in] reg: Register to be written.
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* @param [in] data: The pointer to the buffer contains the data to be written.
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* @param [in] len: Buffer size in byte.
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* @retval rt_err_t:
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* - RT_EOK
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* - -RT_ERROR
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*/
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static rt_err_t BSP_TCA9539_I2C_Write(struct rt_i2c_bus_device *bus, rt_uint8_t reg, rt_uint8_t *data, rt_uint16_t len)
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{
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struct rt_i2c_msg msgs;
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rt_uint8_t buf[6];
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buf[0] = reg;
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if (len > 0)
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{
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if (len < 6)
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{
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rt_memcpy(buf + 1, data, len);
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}
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else
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{
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return -RT_ERROR;
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}
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}
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msgs.addr = BSP_TCA9539_DEV_ADDR;
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msgs.flags = RT_I2C_WR;
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msgs.buf = buf;
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msgs.len = len + 1;
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if (rt_i2c_transfer(bus, &msgs, 1) == 1)
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{
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return RT_EOK;
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}
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else
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{
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return -RT_ERROR;
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}
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}
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/**
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* @brief BSP TCA9539 Read data.
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* @param [in] bus: Pointer to the i2c bus device.
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* @param [in] reg: Register to be read.
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* @param [out] data: The pointer to the buffer contains the data to be read.
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* @param [in] len: Buffer size in byte.
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* @retval rt_err_t:
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* - RT_EOK
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* - -RT_ERROR
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*/
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static rt_err_t BSP_TCA9539_I2C_Read(struct rt_i2c_bus_device *bus, rt_uint8_t reg, rt_uint8_t *data, rt_uint16_t len)
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{
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struct rt_i2c_msg msgs;
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if (RT_EOK != BSP_TCA9539_I2C_Write(bus, reg, RT_NULL, 0))
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{
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return -RT_ERROR;
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}
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msgs.addr = BSP_TCA9539_DEV_ADDR;
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msgs.flags = RT_I2C_RD;
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msgs.buf = data;
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msgs.len = len;
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if (rt_i2c_transfer(bus, &msgs, 1) == 1)
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{
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return RT_EOK;
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}
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else
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{
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return -RT_ERROR;
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}
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}
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/**
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* @brief Reset TCA9539.
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* @param [in] None
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* @retval None
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*/
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static void TCA9539_Reset(void)
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{
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rt_pin_mode(TCA9539_RST_PIN, PIN_MODE_OUTPUT);
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/* Reset the device */
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rt_pin_write(TCA9539_RST_PIN, PIN_LOW);
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rt_thread_mdelay(3U);
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rt_pin_write(TCA9539_RST_PIN, PIN_HIGH);
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}
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/**
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* @brief Write TCA9539 pin output value.
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* @param [in] u8Port Port number.
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* This parameter can be one of the following values:
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* @arg @ref TCA9539_Port_Definition
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* @param [in] u8Pin Pin number.
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* This parameter can be one or any combination of the following values:
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* @arg @ref TCA9539_Pin_Definition
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* @param [in] u8PinState Pin state to be written.
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* This parameter can be one of the following values:
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* @arg @ref TCA9539_Pin_State_Definition
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* @retval rt_err_t:
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* - RT_ERROR
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* - RT_EOK
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*/
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rt_err_t TCA9539_WritePin(uint8_t u8Port, uint8_t u8Pin, uint8_t u8PinState)
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{
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uint8_t u8TempData[2];
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u8TempData[0] = u8Port + TCA9539_REG_OUTPUT_PORT0;
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if (RT_EOK != BSP_TCA9539_I2C_Read(i2c_bus, u8TempData[0], &u8TempData[1], 1U))
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{
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return RT_ERROR;
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}
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if (0U == u8PinState)
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{
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u8TempData[1] &= (uint8_t)(~u8Pin);
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}
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else
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{
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u8TempData[1] |= u8Pin;
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}
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if (RT_EOK != BSP_TCA9539_I2C_Write(i2c_bus, u8TempData[0], &u8TempData[1], 1U))
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{
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return RT_ERROR;
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}
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return RT_EOK;
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}
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/**
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* @brief Read TCA9539 pin input value.
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* @param [in] u8Port Port number.
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* This parameter can be one of the following values:
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* @arg @ref TCA9539_Port_Definition
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* @param [in] u8Pin Pin number.
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* This parameter can be one or any combination of the following values:
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* @arg @ref TCA9539_Pin_Definition
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* @param [in] u8PinState Pin state to be written.
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* This parameter can be one of the following values:
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* @arg @ref TCA9539_Pin_State_Definition
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* @retval rt_err_t:
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* - RT_ERROR
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* - RT_EOK
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*/
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rt_err_t TCA9539_ReadPin(uint8_t u8Port, uint8_t u8Pin, uint8_t *pu8PinState)
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{
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uint8_t u8TempData[2];
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u8TempData[0] = u8Port + TCA9539_REG_INPUT_PORT0;
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if (RT_EOK != BSP_TCA9539_I2C_Read(i2c_bus, u8TempData[0], &u8TempData[1], 1U))
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{
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return RT_ERROR;
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}
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if (0U != (u8TempData[1] & u8Pin))
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{
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*pu8PinState = TCA9539_PIN_SET;
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}
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else
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{
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*pu8PinState = TCA9539_PIN_RESET;
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}
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return RT_EOK;
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}
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/**
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* @brief Toggle TCA9539 pin output value.
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* @param [in] u8Port Port number.
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* This parameter can be one of the following values:
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* @arg @ref TCA9539_Port_Definition
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* @param [in] u8Pin Pin number.
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* This parameter can be one or any combination of the following values:
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* @arg @ref TCA9539_Pin_Definition
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* @retval rt_err_t:
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* - RT_ERROR
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* - RT_EOK
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*/
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rt_err_t TCA9539_TogglePin(uint8_t u8Port, uint8_t u8Pin)
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{
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uint8_t u8TempData[2];
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u8TempData[0] = u8Port + TCA9539_REG_OUTPUT_PORT0;
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if (RT_EOK != BSP_TCA9539_I2C_Read(i2c_bus, u8TempData[0], &u8TempData[1], 1U))
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{
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return RT_ERROR;
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}
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u8TempData[1] ^= u8Pin;
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if (RT_EOK != BSP_TCA9539_I2C_Write(i2c_bus, u8TempData[0], &u8TempData[1], 1U))
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{
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return RT_ERROR;
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}
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return RT_EOK;
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}
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/**
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* @brief Configuration TCA9539 pin.
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* @param [in] u8Port Port number.
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* This parameter can be one of the following values:
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* @arg @ref TCA9539_Port_Definition
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* @param [in] u8Pin Pin number.
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* This parameter can be one or any combination of the following values:
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* @arg @ref TCA9539_Pin_Definition
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* @param [in] u8Dir Pin output direction.
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* This parameter can be one of the following values:
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* @arg @ref TCA9539_Direction_Definition
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* @retval rt_err_t:
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* - RT_ERROR
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* - RT_EOK
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*/
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rt_err_t TCA9539_ConfigPin(uint8_t u8Port, uint8_t u8Pin, uint8_t u8Dir)
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{
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uint8_t u8TempData[2];
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u8TempData[0] = u8Port + TCA9539_REG_CONFIG_PORT0;
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if (RT_EOK != BSP_TCA9539_I2C_Read(i2c_bus, u8TempData[0], &u8TempData[1], 1U))
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{
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return RT_ERROR;
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}
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if (TCA9539_DIR_OUT == u8Dir)
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{
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u8TempData[1] &= (uint8_t)(~u8Pin);
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}
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else
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{
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u8TempData[1] |= u8Pin;
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}
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if (RT_EOK != BSP_TCA9539_I2C_Write(i2c_bus, u8TempData[0], &u8TempData[1], 1U))
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{
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return RT_ERROR;
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}
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return RT_EOK;
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}
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/**
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* @brief Initialize TCA9539.
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* @param [in] None
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* @retval rt_err_t:
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* - RT_ERROR
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* - RT_EOK
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*/
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int TCA9539_Init(void)
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{
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char name[RT_NAME_MAX];
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uint8_t u8TempData[2];
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TCA9539_Reset();
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rt_strncpy(name, BSP_TCA9539_I2C_BUS_NAME, RT_NAME_MAX);
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i2c_bus = (struct rt_i2c_bus_device *)rt_device_find(name);
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if (i2c_bus == RT_NULL)
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{
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rt_kprintf("can't find %s device!\n", BSP_TCA9539_I2C_BUS_NAME);
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return RT_ERROR;
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}
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/* All Pins are input as default */
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u8TempData[0] = TCA9539_REG_CONFIG_PORT0;
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u8TempData[1] = 0xFFU;
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if (RT_EOK != BSP_TCA9539_I2C_Write(i2c_bus, u8TempData[0], &u8TempData[1], 1U))
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{
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return RT_ERROR;
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}
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u8TempData[0] = TCA9539_REG_CONFIG_PORT1;
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if (RT_EOK != BSP_TCA9539_I2C_Write(i2c_bus, u8TempData[0], &u8TempData[1], 1U))
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{
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return RT_ERROR;
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}
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return RT_EOK;
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}
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INIT_PREV_EXPORT(TCA9539_Init);
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#endif /* BSP_USING_TCA9539 */
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