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mdemuth
Joined: 16 Apr 2007
Posts: 71
Location: Stuttgart, Germany
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| PIC16f15324 Pin A4 and Pin A5 not responding [solved] |
 Posted: Tue Nov 22, 2022 5:57 am |
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Hello,
I am trying to get Pin A4 and Pin A5 working on PIC16f15324.
CCS Compiler Version: 5.103
My code:
| Code: |
#include <16f15324.h>
#fuses HS, NOCLKOUT, NOWDT,NOPROTECT,BROWNOUT,PUT,MCLR, BORV27
#use delay(clock=32000000)
#zero_ram
void main()
{
setup_oscillator (OSC_HFINTRC_32MHZ);
setup_adc_ports(NO_ANALOGS);
setup_adc(ADC_OFF);
while (1)
{
output_a(0xff);
output_c(0);
delay_ms(1);
output_a(0x00);
output_c(0xff);
delay_ms(1);
restart_wdt();
}
} // main ends
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Port C toggles as expected.
Port A: Pin A0, Pin A1 and Pin A2 toggles as well.
But: Pin A4 and Pin A5 show no (re)action.
(I have tried 3 PCBs so I would exclude a hardware related problem.)
What could be the problem?
Michael
Last edited by mdemuth on Tue Nov 22, 2022 6:48 am; edited 1 time in total |
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Ttelmah
Joined: 11 Mar 2010
Posts: 19215
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| Posted: Tue Nov 22, 2022 6:29 am |
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You are enabling the external oscillator (HS fuse). Probably what is causing
the problem. You don't need to use setup oscillator. Try:
| Code: |
#include <16f15324.h>
#fuses NOEXTOSC,NOWDT,NOPROTECT,BROWNOUT,PUT,MCLR, BORV27
#use delay(internal=32MHz)
#zero_ram
void main()
{
setup_adc_ports(NO_ANALOGS);
setup_adc(ADC_OFF);
while (TRUE)
{
output_a(0xff);
output_c(0);
delay_ms(1);
output_a(0x00);
output_c(0xff);
delay_ms(1);
//restart_wdt(); //You haven't got the watchdog enabled.
}
} // main ends
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Note the NOEXTOSC, and the changes to the clock settings.
as a comment, putting restart_wdt instructions inside code where they
can always be reached (if your watchdog was enabled), completely prevents
the watchdog from doing anything useful. The watchdog reset, needs to
_only_ be reachable if code is running properly. It is a 'bugbear' of mine
that the CCS 'inbuilt' operations that reset the watchdog for you (like
delay), show that they do not understand how a watchdog should be used. |
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mdemuth
Joined: 16 Apr 2007
Posts: 71
Location: Stuttgart, Germany
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| Posted: Tue Nov 22, 2022 6:47 am |
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Strike! 
Thanks! |
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temtronic
Joined: 01 Jul 2010
Posts: 9097
Location: Greensville,Ontario
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| Posted: Tue Nov 22, 2022 9:15 am |
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comment : WDT
Generally speaking, do NOT enable the WDT until 100% of the program is 'up and running', ready to sell.
Usually set WDT to x2 or x3 the time for a 'main() loop' to occur ?
If it's enabled before, all sorts of weird and NOT wonderful things can happen, causing no end of grief....and hair pulling ...... |
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