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Posted on May 26, 2017 at 18:11 I'm use STM32F412RGT. IDE is IAR. if(__HAL_I2S_GET_FLAG(&hi2s3, I2S_FLAG_FRE) && __HAL_I2S_GET_FLAG(&hi2s3, I2S_FLAG_CHSIDE))  {  __HAL_I2S_DISABLE(&hi2s3);  while(HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_4) != GPIO_PIN_SET)/...