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rt-thread/bsp/hc32/ev_hc32f4a0_lqfp176/board/ports/tca9539.c

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