DMA with ADC Injected mode/stm32f4

[Safa BEJAOUI]

Posted on January 19, 2018 at 15:52

hello, I'm working with the stm32f4-discovery Board , in fact i have a problem using the DMA with an ADC 'injected channel'. I've configured the DMA to transfer the converted data from the injected data register 'JDRx' to a buffer adressed in the Memory but no transfer operation occurs...I've realy checked my configs and i couldn't figure out what is wrong...thank you for your support.

[nechi]

Posted on January 19, 2018 at 15:54

Maybe it's not supported See the reference manual Good luck 

[Safa BEJAOUI]

Posted on January 19, 2018 at 16:09

Mr IN I've realy checked several times the reference manual, it's not mentionned clearly that injected mode dosen't support DMA..thanx for ure help any way

[Tesla DeLorean]

Posted on January 19, 2018 at 17:26

Injected is specifically designed to pull out-of-band conversions, where the normal samples use DMA. It does this to address a number of sequencing and ordering issues.

Not sure that any DMA channels have an 'Injected ADC' trigger, which would tend to foreclose options to do it that way.

[Safa BEJAOUI]

Posted on January 23, 2018 at 09:49

Thank you very much Mr clive for your support