lcd problem

[rsocor01]

Malcolm,

Double check the voltage on Vo (contrast adjustment). Go all the way from the minimum to the maximum on the potentiometer.

Robert

[malc-c]

Malcolm,

Double check the voltage on Vo (contrast adjustment). Go all the way from the minimum to the maximum on the potentiometer.

Robert

Robert, thanks for the input - voltage range = 0.00 to 4.46v

[Jerson]

Malcolm

Please post the code you're using. I suspect the code is re-starting after printing the message.

Jerson

[malc-c]

Personally I don't think it's the code - this has been running fine in the development board (see the 4ch thermostat post under the code section), and the PIC seems to be running OK when used on the stripboard as the LEDs indicate the PID routines work when the temperature detected by the probes are increased / decreased. My hunch is that it has to be something with the stripboard, I might try re-soldering the wires as it could be something as simple as a dry joint ?

[malc-c]

Personally I don't think it's the code - this has been running fine in the development board (see the 4ch thermostat post under the code section), and the PIC seems to be running OK when used on the stripboard as the LEDs indicate the PID routines work when the temperature detected by the probes are increased / decreased. My hunch is that it has to be something with the stripboard, I might try re-soldering the wires as it could be something as simple as a dry joint ?

Uhmm... well I just belled out each wire pin fo pin and it all checks out.

[Jerson]

Could be even simpler - decoupling caps 0.1uF? since you mentioned using strip board

[malc-c]

Yep, have one fitted across the supply lines next to the pic - might put a few more in

I've just breadboarded the pic (pic, xtal, caps and the lcd) and it's running fine... must be a fault somewhere on the board...

Thanks guys for all your inputs

[aratti]

DEFINE LCD_LINES 4               ' number of lines on LCD

Your define is for a 4 lines LCD while you are using a two lines display (as per picture in your post #1)

Al.

[malc-c]

DEFINE LCD_LINES 4               ' number of lines on LCD

Your define is for a 4 lines LCD while you are using a two lines display (as per picture in your post #1)

Al.

Sorry, but misleading as that was taken from the EasyPIC manual, I'm actually using a 4 x 20 as stated in my 1st post.