Issue Synching Dual-Mode ADC Conversions

[cballard]

Posted on April 28, 2010 at 18:51

Issue Synching Dual-Mode ADC Conversions

[tobbeanton]

Posted on May 17, 2011 at 13:49

Hello,

I have the exact same problem however I am running dual mode, DMA, with an external timer trigger. My ADC is setup to convert 6 channels synchronously on ADC1 and ADC2 and doing this each time the timer 2 triggers.

I've kind of pinned it down to that it is the DMA that transfers to many values but I have to confirm this. Also during the first conversion it often happens that e.g. the last channel that is setup to be converted is converted for all channels on ADC2.

I've tested numerous setups for the channel groups and they all yield a different, but wrong, result.

Regards, Tobias

[parag]

Posted on May 17, 2011 at 13:49

HI All,

Could you please tell how to calibrate the ADC. I am giving input of 3.3v and when i write a code to read PC4 pin, i am getting 4095 so i want to convert this value 3.3v. Please tell me is there any specific formula to calibrate ADC?