ADC data is transferred by DMA but no values in memory, just 0 (Nucleo-H734ZI2)

[KSOdin2]

I am taking the values from adc1 and sending them via DMA1 to a memory location. I had followed a tutorial for the STM32F series, but I have also looked at the example code in the STMCube IDE. But it still does not work. 

I got the ADC_DMA example to work and give me values. But I want to get it to work when I can configure the chip pins via the.IOC file.

 I feel like setting up a project with the ability to set pins this way is better, but am I right?

On my Nucleo board, LD8 at the bottom of the board next to the label VBUS lights up when running the program. I can't find anything which tells me why this is. But could this be an indication of my problem?

I have attached some of my code, as hopefully, it may answer some questions. I can't attach it all as it is "too large."

Sorry if my post is confusing. Thank you in advance for any help.

 
#define ADC_CONVERTED_DATA_BUFFER_SIZE   ((uint32_t)  32)   /* Size of array aADCxConvertedData[] */
 
 
ALIGN_32BYTES (static uint16_t   aADCxConvertedData[ADC_CONVERTED_DATA_BUFFER_SIZE]);
 
 
 
  if (HAL_ADC_Start_DMA(&hadc1,
                        (uint32_t *)aADCxConvertedData,
                        ADC_CONVERTED_DATA_BUFFER_SIZE
                       ) != HAL_OK)
  {
    Error_Handler();
  }

[Tesla DeLorean]

What memory is it going into? What are MPU settings for that?

Cache coherency?

[KSOdin2]

I Currently I have the D-Cache and I-Cache enabled.

When I add "aADCxConvertedData" to memory it seems the address is 0x20000100. This is SRAM

I'm a bit unsure where I should look for MPU setting and Cache coherency. Any link you suggest for me to look at?

Sorry for not being helpful

[Piranha]

STM32H7 is one of the most complex MCUs out there and it's a very bad choice for beginners.

And D-cache is definitely not for beginners. Disable it until you learn how it works.

The related information can be found in AN4838 and AN4839.

[KSOdin2]

@Piranha​ I have to use the STMH7 unfortunately for it's high sampling ADC. Thank you for those links I'll work my way through them.

Do I have to use D-cache for DMA ADC transfer?

Thanks again!

[KSOdin2]

@Piranha (Community Member)​ I have to use the STMH7 unfortunately for it's high sampling ADC. Thank you for those links I'll work my way through them.

Do I have to use D-cache for DMA ADC transfer?

Thanks again!