/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_USB_DEVICE_Init();
MX_I2C2_Init();
/* USER CODE BEGIN 2 */
/*##-5- Master sends read request for slave ##############################*/
do
{
if(HAL_I2C_Master_Transmit_IT(&I2cHandle, (uint16_t)I2C_ADDRESS, (uint8_t*)&bTransferRequest, 1)!= HAL_OK)
{
/* Error_Handler() function is called in case of error. */
Error_Handler();
}
执行到这里 SCL SDA 就全拉低了·,波形上也看得出
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