CH455G 硬件HAL库 I2C驱动

xu1638540273

已于 2025-02-04 01:54:11 修改

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文章标签： c++

于 2025-02-04 01:42:57 首次发布

本文链接：https://blog.youkuaiyun.com/xu1638540273/article/details/145435357

版权

概要

CH455G 硬件HAL库 I2C驱动能正确采集到案件数值

参考 https://blog.youkuaiyun.com/jzffzj/article/details/107379205
参考 https://github.com/Cathgao/peripherals-libraries-for-STM32/blob/2315f1227b910560f88f98570bea895129216879/CH455/CH455.c

技术细节


/**
 * @breif: 读取CH455键盘数据
 * @param: 无
 * @return: 读取到的数据
 */
uint8_t CH455_ReadKey(void)
{
    uint8_t key_value;
    while (HAL_I2C_Master_Receive(&hi2c1, 0x4F, &key_value, 1, 0xff) != HAL_OK)
    {
        if ((HAL_I2C_GetError(&hi2c1) != HAL_OK))
        {
            HAL_I2C_Init(&hi2c1);
            printf("CH455 read key ERROR! 0x%x \n", HAL_I2C_GetError(&hi2c1));
            return 0;
        }
    }
    printf("CH455 read key 0x%x \n", key_value);
    return key_value;
}

/**
 * @breif: 驱动CH455数码管显示
 * @param: cmd: 要写入的数据
 * @return: 无
 */
void CH455_Write(uint16_t cmd)
{
    uint8_t data1 = 0;
    uint8_t data2 = 0;
    data1 = ((uint8_t)(cmd >> 7) & CH455_I2C_MASK) | CH455_I2C_ADDR;
    data2 = (uint8_t)(cmd & 0x00ff);
    HAL_I2C_Master_Transmit(&hi2c1, data1, &data2, 1, 1000);
}

void CH455_Init(void)
{
    CH455_Write(CH455_8SEG_ON); // 开启显示和键盘，8段显示方式
}