David and et al, I finally was able to locate the proper term to use for the=20 individual bits on a port. It is LATxn, where x is the port and n is the=20 bit number. Such as: LATA0 for RA0. I still can't send data to the LCD=20 but all of my warnings with went away and the LCD does initialize correctly= .. Thanks, rich! P.S. I'm making some progress. rich! On 10/22/2015 8:18 PM, David Duffy (AVD) wrote: > Can you give me a few lines of how you're using them in the code? > > On 23/10/2015 11:01 AM, Richard R. Pope wrote: >> David, >> Here are the pins used. >> #define LCD_rs RA0 //Pin 2 LCD pin = 4 >> #define LCD_rw RA1 //Pin 3 LCD pin 5 >> #define LCD_e RA2 //Pin 4 LCD pin = 6 >> #define LCD_data LATAD 19-22 and pins 27-30 >> Notice that LATAD works with the LCD_data definition! I don't get= it. >> Thanks, >> rich! >> >> On 10/22/2015 7:45 PM, David Duffy (AVD) wrote: >>> Ah.... I hadn't been playing along. :) >>> >>> So, what actual port pin is RS on ? >>> David... >>> >>> On 23/10/2015 10:08 AM, Richard R. Pope wrote: >>>> David, >>>> Let's try this again. I decided to use a 18f4550 instead of t= he >>>> 16f877a. Sorry about that. The PIC and LCD initialize but I can't get >>>> the LCD to accept and display any data such as a or b or hello there a= nd >>>> so forth. I have been discussing the 4550 all along and you were under >>>> the impression that I was using a 877. My fault. >>>> --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .