I've fixed the external oscilator problem, changing out the caps with lower valued ones worked. Now to work on getting the LCD to time corectly output the data. Just to make sure 20MHz should be able to handle a 9600 baude rate without any trouble shouldn't it? Also is there and extra code I need to add to ensure stable operation outside of '@ DEVICE PIC16F88, HS_OSC' and DEFINE 20?
20mhz is plenty high to use with 9600 baud (Appendix A of the PBP manual).Originally Posted by AlaskanEE
DEFINE 20 is not the correct usage for that DEFINE (Section 4.16)
I know I forgot to put OSC between DEFINE and 20. Anyways here's the code I used trying to get an alphabet output to go through using the 20 MHz external oscillator. the LCD showed a new character every .25 seconds but they were all random characters. Seems like a timing issue to me.
ohh I also tried the original code that skimask used working with the internal oscilator, it gave the same result, successive random symbols and leters.
Again, generally, random symbols and characters usually mean the baud rate is just a tad too far off. And I know you're not this far, but 'generally speaking' (not a hard fact, but usually accuracte), if the baud rate is a bit slow, you get framing errors, too fast gives overrun errors.
is it possible for me to use a baude rate other than 2400bps or 9600bps?
Here's a program for you:
MAIN:
LCDOUT "See the manual as noted in earlier posts."
Goto Main
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