• State Not Answered
  • Locked Locked
  • Replies 13 replies
  • Subscribers 22 subscribers
  • Views 5448 views
  • Users 0 members are here
Options
Related
How was your experience today?
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

reading A/D value from the potentiometer

adel tekari

Dear Keil users,
I'm new here.
In BLINKY I want to do the following :

Write the A/D value read from the potentiometer and write it onto the LCD panel

Analogvalue 754

#include <stdio.h>
// after reading the analog value
set_cursor (0, 0);
sprintf(text1,"Analogwert %5d",AD_value);
lcd_print (text1);

But I don't know how to read the value from the potentiometer.Any suggestions?
Thanks for advance for any help.
Adel.

Parents
  • 0 in reply to adel tekari

    So, have you performed the normal routine of eliminating possible error sources?

    Have you verified that the potentiometer can generate the full range of voltages that the ADC can measure?

    Have you verified that the ADC voltage reference is correct?

    Have you verified that the binary value you read from the ADC can take any value between 0 and 0x3ff, i.e. between 0 and 1023?

    Have you verified that your sprintf - if given a value of 1023 - will produce a correct text string?

    Have you verified that said string will be corerctly sent to the display?

    Performing these steps should give a good indication exactly what problem you have - and how/if you can fix it.

Reply
  • 0 in reply to adel tekari

    So, have you performed the normal routine of eliminating possible error sources?

    Have you verified that the potentiometer can generate the full range of voltages that the ADC can measure?

    Have you verified that the ADC voltage reference is correct?

    Have you verified that the binary value you read from the ADC can take any value between 0 and 0x3ff, i.e. between 0 and 1023?

    Have you verified that your sprintf - if given a value of 1023 - will produce a correct text string?

    Have you verified that said string will be corerctly sent to the display?

    Performing these steps should give a good indication exactly what problem you have - and how/if you can fix it.

Children
No data