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STM32F3 simultaneous ADC conversions

Question asked by Jakub Konieczny on May 9, 2018
Latest reply on May 13, 2018 by kader ben

Hi.

I want to do do ADC conversions on all 3 ADCs simultaneous: they should be done in the same time. How should I achieve that?

1. With DMA? I can do multichannel conversions, but they are not simultaneous. When I start `HAL_ADC_Start_DMA(&hadc1, adcData[0], 5);` 3 times, it looks like it does conversions for each ADC synchronous. MultiMode is only for 2 DMA channels and I need to do 3 measurements simultaneous.

2. With IRQ: start conversions with interrupts and catch them all, and then when I get all 3 start them again?

3. Mix them?

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