stm32f411re adc

[chasekan27]

hi ,
adc configuration is done, it builds and able to flash into the device but it is not showing the right value, please let me know the reason why it fails in reading the right adc value, in the adc pin 0 (A0) if either i connect 0v or 3.3v it gives the same output of raw value 4 and volatge 3,
you can find my code here
https://github.com/chasekan27/10i2c_adc_demo1