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Clock on PIC18F46K80

 
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javick82



Joined: 12 Jul 2007
Posts: 43

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Clock on PIC18F46K80
PostPosted: Mon Nov 07, 2011 8:12 pm     Reply with quote
I don't know why setting up the clock on the PIC gives me such a headache, but I just can't get a simple "Hello World" going on my RS232 port.

so far:
Code:

#INCLUDE <18F46K80.h>
#NODEBUG,NOWDT //Have tried HSH,HSM,many combinations
#USE DELAY (CLOCK=20000000)
#USE RS232(XMIT=PIN_C7,RCV=PIN_C6,BAUD=9600)

void main()
{
  printf("Hello, World\n\r");
  while(1);
}


I have tried a number of combinations of PLL stuff, HSH, HSM, different clock speeds (my oscillator is 20 MHz).

I am on a brand new board, but I can print out to my onboard LCD without any issue, and I get some "noise" on my serial port monitor (cursor moves, characters appear with some settings).

Advice/direction/solutions/explanation would be greatly appreciated!
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Mon Nov 07, 2011 10:24 pm     Reply with quote
Here is a program that uses the internal oscillator and outputs text on
RS-232:
http://www.ccsinfo.com/forum/viewtopic.php?t=46255&start=5
javick82



Joined: 12 Jul 2007
Posts: 43

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PostPosted: Tue Nov 08, 2011 9:16 am     Reply with quote
So with the added confidence of getting it to work with the internal oscillator, I played around with the code a bit more to get it to work with my external (I think???) oscillator.

I think this was probably due to my use of streams and not using fprintf over printf.

Fuses and clock speed settings work exactly as I would expect now Rolling Eyes
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