Gaps when playing audio file with DAC I'm trying to play a sound file with raw PCM data using the DAC:uint8_t buffer[16384]; // 4-aligned
uint8_t *bufptr[2] = {buffer, buffer + sizeof(buffer) / 2};
int curr_buffer = 0;
volatile int audio_dma_half_complete = 0;
f_read(fh, buffer, sizeof(buffer), &br);
HAL_TIM_Base_Start(&htim6);
sConfig.DAC_Trigger = DAC_TRIGGER_T6_TRGO;
sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
if (HAL_DAC_ConfigChannel(&hdac, &sConfig, DAC_CHANNEL_2) != HAL_OK)
return 1;
if (HAL_DAC_Start_DMA(&hdac, DAC_CHANNEL_2, (uint32_t *)buffer, file_size,
DAC_ALIGN_8B_R) != HAL_OK)
return 2;
while (1) {
while (!audio_dma_half_complete);
f_read(fh, bufptr[curr_buffer], sizeof(buffer) / 2, &br);
if (br == 0)
break;
audio_dma_half_complete = 0;
curr_buffer = !curr_buffer; // toggle buffer half
}
HAL_TIM_Base_Stop(&htim6);
HAL_DAC_Stop_DMA(&hdac, DAC_CHANNEL_2);Note that the file contains raw PCM data that as already been reduce
