[参考译文] BQ76972：Stm32G4 和 BQ76972 读取/写入之间的 I2C 通信失败

https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1531298/bq76972-i2c-communication-between-stm32g4-and-bq76972-read-write-failing

工具/软件：

您好团队：

我正在努力在 STM32 MCU 和 BQ76972 IC 之间建立基本通信。 但是、我遇到了一个问题、即写入操作仅成功一次、后续尝试都会失败。

您能帮助我调查这个问题吗？

随附该代码以供您参考。

谢谢您、

恶劣

// Simple I2C write between Stm32 and BQ76972 //

HAL_StatusTypeDef BQ76972_WriteByte(uint8_t reg_addr, uint8_t data)
{
    return HAL_I2C_Mem_Write(&hi2c3, BQ76972_I2C_ADDR_WRITE, reg_addr, I2C_MEMADD_SIZE_8BIT, &data, 1, HAL_MAX_DELAY);
}


void Test_Write_BQ76972(void)
{
    char msg[64];

    if (BQ76972_WriteByte(0x09, 0x00) == HAL_OK)
    {
    	sprintf(msg, "Write to PROTECT1 OK\r\n");
		RS485_Transmit((uint8_t*)msg, strlen(msg));

    }
    else
    {
    	sprintf(msg, "Write Failed\r\n");
		RS485_Transmit((uint8_t*)msg, strlen(msg));
    }
}