4Mhz Circuit with a 20Mhz PIC

[mackrackit]

Have you tried Oscillator setting on "HS"?

[koossa]

No
I will try

[koossa]

I have set it to HS, but still nothing.

[Bruce]

Attach the compiled .HEX file that you are programming into the PIC here. If there's a
problem with your config settings, that makes it easy for someone to spot.

[koossa]

Bruce

Attached the zipped hex file.

Thank you very much for your time!

[Bruce]

Hi Koossa,

The good news is - config settings look fine. XT osc, WDT on, PWRT on, brownout on,
LVP off, protection off. Looking good here if you're using a 4MHz external crystal.

The bad news is - this code isn't anywhere near what you show above just trying to
toggle an LED.

It sets up the USART for 19,200bps at 4MHz, shoots out a single letter f, then sits & spins
waiting for serial data input, in a loop watching the RCIF flag bit.

Are you 100% sure you're actually programming the file you expect into your 877?

The .HEX file you have attached is for sure not the one you show above trying to toggle
an LED....;o}

[Archangel]

Hello Koossa,
try adding this to your code:

CCP1CON = 0 ' DISABLE CAPTURE COMPARE MODULE
TRISC = %00000000 ' SET ALL PORT C TO OUTPUTS


JS