STM32F4 Possible ADC Configuration?

keaven · ‎2015-08-05

Posted on August 05, 2015 at 19:29

Hello all,

I am using the ADC1 regular conversion or ADC1/2 dual-mode regular conversion to acquire a video signal. The dual-mode is used at higher frame rate. In both case, I am using the DMA. This part is working without a glitch.

Now, I want to use the ADC3 to convert in regular mode a few other channels. I start the conversion after the video signal conversion is completed. The problem I have is that when I am using the dual-mode at higher frame rate, it seems the ADC3 is alway busy.

Could you tell me if this configuration is possible?

ADC1/2 regular dual-mode with DMA.

ADC3 regular single conversion.

Thank you

#stm32f4 #adc

Amel NASRI · ‎2015-08-31

Posted on August 31, 2015 at 15:30

Hi Keaven,

Your configuration doesn't seem to be an odd one.

The problem I have is that when I am using the dual-mode at higher frame rate, it seems the ADC3 is alway busy.

How exactly is ADC3 busy? Is there any error flag?

Did you tried other configuration for ADC1/2 on which ADC3 is working also?

When you debug your code, does it get stuck at a some level?

-Mayla-

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