I use STM32H743 and STM32CubeMX.
ADC1 operates in ADC_CONVERSIONDATA_DMA_ONESHOT mode.
Writes 512 samples to memory (address 0x24003F20).
After recording, I process the data and run DMA again.
But the data in the memory area does not change (as if frozen).
If you simply restart the DMA in a loop (without reading them in the program), then the data is written and changed.
Why? And what needs to be done so that the data changes and there is access to them?
Souce code
in main:
HAL_ADC_Start_DMA(&hadc1, (uint32_t *)&arcanbuff0[2], 512); // start ADC DMA
HAL_TIM_Base_Start(&htim8); // Start trigger for ADC samplerate 2MSPS
while(1){
if(IsIntADCDMA == 1) { // wait DMA
IsIntADCDMA = 0;
HAL_ADC_Start_DMA(&hadc1, (uint32_t *)&arcanbuff0[0], 512); // restart DMA
}
};
Handle DMA (only copy data):
void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc)
{
if(hadc->Instance == ADC1) {
if(IsIntADCDMA == 0) {
IsIntADCDMA = 1;
uint32_t *Src = (uint32_t *)&arcanbuff0[0];
uint32_t *Dst = (uint32_t *)&Engine_UintAADC0[0];
uint32_t *End = (uint32_t *)&Engine_UintAADC0[256];
while(Dst < End) { // only copy data, If this cycle is commented, then everything
// works and data in arcanbuff0 renew, otherwise not renew
*Dst++ = *Src++;
}
}
}
}
Thanks in advance.
