Code works on simulator but not on real PIC

[gregmcc]

I've been fiddeling around with Nigel's LCD tutorial and got it going on Oshonshoft's simulator as well as on a real PIC. (with a 1x16 LCD)

I've now changed the PIC to a 16f877 and the LCD works on the simulator - it prints out the word "Testing". I've setup a loop so that it only displays the 1st line from the code.

If I program the PIC now however, it only prints out "esting" - missing the "T"

I thought it might be a delay problem but I've tried messing around with various values - no joy.

Can anyone offer any suggestions. I've posted the code I'm using.

 

[Pommie]

You aren't going through the proper initialisation sequence. See the attached for details.

Mike.

 

[gregmcc]

Thanks - nice flowchart. I'll relook at my code tonight and compare it to the chart.

I'll post the results.

 

[blueroomelectronics]

There is a program in the back of the Unicorn manual that does a software LCD reset.

 

[eng1]

    __CONFIG 0x3F7D

The Watch Dog Timer is enabled.
Personally I like using the config labels, that make your code more readable by others (as far as the configuration fuses are concerned).

 

[gregmcc]

I used some of the lcd init code from here and it seems to have fixed the problem:

http://www.mcmanis.com/chuck/Robotics/projects/lab-x3/lcd0.html