Unable to get ADC running on STM32H743Zi

[awais_h]

Hi everyone,

I am working on ADC of STM32H743Zi, but i am unable to get it running.

Can anyone guide me .

The DMA command is

HAL_ADC_Start_DMA(&hadc2,(uint32_t*)ADC_1,1);

[awais_h]

1-Is there any DMA problem?

2-Or the ADC is not starting at all?

3- What should be setting of DMA and DMA memory sections?

[awais_h]

Hi,

I have added D2 Ram in my linker and ADC variables are stored in D2 Ram. ADC is working fine in end of conversion mode but DMA is not working .

 hadc2.Instance = ADC2;

 hadc2.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV2;

 hadc2.Init.Resolution = ADC_RESOLUTION_16B;

 hadc2.Init.ScanConvMode = ADC_SCAN_ENABLE;

 hadc2.Init.EOCSelection = ADC_EOC_SINGLE_CONV;

 hadc2.Init.LowPowerAutoWait = DISABLE;

 hadc2.Init.ContinuousConvMode = ENABLE;

 hadc2.Init.NbrOfConversion = 1;

 hadc2.Init.DiscontinuousConvMode = DISABLE;

 hadc2.Init.ExternalTrigConv = ADC_SOFTWARE_START;

 hadc2.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;

 hadc2.Init.ConversionDataManagement = ADC_CONVERSIONDATA_DMA_CIRCULAR;

 hadc2.Init.Overrun = ADC_OVR_DATA_OVERWRITTEN;

 hadc2.Init.LeftBitShift = ADC_LEFTBITSHIFT_NONE;

 hadc2.Init.OversamplingMode = DISABLE;

And I have added this in my code

#define __SECTION_RAM_D2 __attribute__((section(".RAM_D2"))) /* AHB SRAM (D2 domain): */

ADC is working fine with

HAL_ADC_GetValue(&hadc1);

but the DMA is not working.

HAL_ADC_Start_DMA(&hadc2,(uint32_t *) &Adc,2);

What will be the problem?

[awais_h]

Hi all,

ADC was sampling fine without DMA.

I placed ADC array in D2 Ram and DMA was functioning.

MPU_Confg(); must be called.

Now Its working.

Thanks to all,

If any one needs help on ADC DMA

email me at awais_hafeez@hotmail.com