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The use of delay for external crystal on a PIC12F1572

 
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Momboz



Joined: 03 Jun 2009
Posts: 29

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The use of delay for external crystal on a PIC12F1572
PostPosted: Sun Feb 16, 2020 5:07 am     Reply with quote
Hi

I am having trouble understanding what's wrong with my code on a PIC12F1572.

My code (*.c)
Code:
#include <CCS_12F1572_Billy.h>

void main()
{

  while(TRUE)
  {

    //Example blinking LED program
    output_low(LED);
    delay_ms(DELAY);
    output_high(LED);
    delay_ms(DELAY);

    //TODO: User Code
  }

}


The header file (*.h)
Code:

#include <12F1572.h>
#device ADC=10
#use delay (crystal=4MHz)

#define LED PIN_A0
#define DELAY 10


Anf here is the error from CCS compiler version 5.078

Quote:

Compiling E:\UserData\PIC-Stuff\Examples Momo\CCS_12F1572_Billy on 16-Feb-20 at 12:01
*** Error 99 "E:\UserData\PIC-Stuff\Examples Momo\CCS_12F1572_Billy.h" Line 3(5,26): Option invalid Invalid Combination
1 Errors, 0 Warnings.
Build Failed.


Any help? any advice?

Many thanks.
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Sun Feb 16, 2020 5:41 am     Reply with quote
Look at the oscillator diagram in the datasheet. It shows no crystal
oscillator support circuit or pins. It has a single CLKIN pin. That's for
an external clock source. Yes, a small number of PICs have no support
for crystals.
Momboz



Joined: 03 Jun 2009
Posts: 29

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PostPosted: Sun Feb 16, 2020 10:02 am     Reply with quote
PCM programmer wrote:
Look at the oscillator diagram in the datasheet. It shows no crystal
oscillator support circuit or pins. It has a single CLKIN pin. That's for
an external clock source. Yes, a small number of PICs have no support
for crystals.


That was the issue.
Many many thanks.
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