Stm32f4 ADC exemple

[achourwissem]

Posted on August 31, 2013 at 19:50

hello

i tried ST's adc exemple and i got weird values of my variable while debugging , for exemple i got 30 for 2.0 v and -1000 for 2.5 v , so anyone have a working code with no weird things? and thnx :)

[Tesla DeLorean]

Posted on September 01, 2013 at 01:34

https://my.st.com/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/DispForm.aspx?ID=32392&RootFolder=/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/Help%20with%20simple%20ADC%20on%20STM32F4&Source=https://my.st.com/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/Flat.aspx?RootFolder%3D%252Fpublic%252FSTe2ecommunities%252Fmcu%252FLists%252Fcortex_mx_stm32%252FHelp%2520with%2520simple%2520ADC%2520on%2520STM32F4%26FolderCTID%3D0x01200200770978C69A1141439FE559EB459D7580009C4E14902C3CDE46A77F0FFD06506F5B%26currentviews%3D305

[achourwissem]

Posted on September 01, 2013 at 12:19

thank you clive it's better anyway , i got this values on debugging the array table values :

2 , 24 , 1040 , 1418 , 2001 , 2400 ,2800 , 3381 , 4095 , 3895

the problem is at 5v i got value 3895 and at 4.xx v i got 4095 !! :o

any help plz

[Tesla DeLorean]

Posted on September 01, 2013 at 15:44

How exactly do you expect to sample 5V on a part that's probably running at 3V? Wouldn't that exceed VREF+?

[achourwissem]

Posted on September 01, 2013 at 19:37

yeah right VREF+ is 3.3v thnx :)