About FDrab.1

FDrab.1 · 2020-07-03

Hi,I want to use an ADC with DMA in a STM32F103. I configured it in Cube as you can see in the following picures.When I start the conversion with HAL_ADC_Start_DMA(&hadc1,(uint32_t*)AdcData,5);HAL_ADC_ConvCpltCallback() is called and I see that the A...

FDrab.1 · 2020-07-09

I use the Segger tool chain, which is quite reliable. >>Then I reset all registers of the ADC and DMA to the values they had at the first cycle at exactly this location. >What exactly do you do? Doesn't this start an ADC conversion?I set the registe...

FDrab.1 · 2020-07-06

Hi JW,why I think setting the DMA bit causes a conversion? I set a breakpoint to the line where the ADC_CR2_DMA bit is set. Then I reset all registers of the ADC and DMA to the values they had at the first cycle at exactly this location. When I now s...

FDrab.1 · 2020-07-04

Now I found out that the false ADC conversion is triggered by setting the DMA bit when it is already set. Somehow the HAL does not clear this bit at the end of conversion.I added hadc1.Instance->CR2 &= ~ADC_CR2_DMA;to my code after the conversion fi...

FDrab.1 · 2020-07-04

Hello JW. Thanx for your answer.Though your answer sounds feasible it doesn't solve my problem.I set discontinuous mode to "disabled" and regenerated the code.What I now see is that in the second scan cycle the DMA waits endlessly for data.I debugged...

FDrab.1 · 2020-07-04

I just found out, that the first sequence is correct (no double data). The second and following sequences are wrong...

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ADC with DMA in discontinuous mode samples first rank twice (STM32F103)

Re: ADC with DMA in discontinuous mode samples first rank twice (STM32F103)

Re: ADC with DMA in discontinuous mode samples first rank twice (STM32F103)

Re: ADC with DMA in discontinuous mode samples first rank twice (STM32F103)

Re: ADC with DMA in discontinuous mode samples first rank twice (STM32F103)

Re: ADC with DMA in discontinuous mode samples first rank twice (STM32F103)