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Message |
incubi
Joined: 08 Apr 2008
Posts: 8
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| Delays stop working if ICD=TRUE is enabled on 18F4520 |
 Posted: Tue Apr 08, 2008 7:40 pm |
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Hello,
Does anyone know what would cause a Delay_Ms to not work when the IDC-TRUE is set? It like the delays are gone but if I load the debug everything works. I’ve tried all the options I know of but still the same issue.
Thanks
| Code: |
#### Code snip . c ####
include "main.h"
#int_RTCC
void RTCC_isr(void)
{
output_bit(PIN_D1,0);
Delay_Ms(2000);
}
void main()
{
// setup_adc_ports(NO_ANALOGS|VSS_VDD);
// setup_adc(ADC_OFF|ADC_TAD_MUL_0);
// setup_psp(PSP_DISABLED);
// setup_spi(SPI_SS_DISABLED);
// setup_wdt(WDT_OFF);
setup_timer_0(RTCC_INTERNAL );
// setup_timer_1(T1_DISABLED);
// setup_timer_2(T2_DISABLED,0,1);
// setup_timer_3(T3_DISABLED|T3_DIV_BY_1);
// setup_comparator(NC_NC_NC_NC);
// setup_vref(FALSE);
enable_interrupts(GLOBAL);
enable_interrupts(INT_RTCC);
for(;;)
{
output_bit(PIN_D1,1);
// restart_wdt();
}
}
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| Code: |
####3 .H #################
#include <18F4520.h>
#device adc=8
#device ICD=TRUE
//#FUSES NODEBUG
#FUSES NOWDT //No Watch Dog Timer
#FUSES WDT128 //Watch Dog Timer uses 1:128 Postscale
#FUSES HS //Low power osc < 200 khz
#FUSES NOPROTECT //Code not protected from reading
#FUSES NOBROWNOUT //Reset when brownout detected
#FUSES BORV25 //Brownout reset at 2.5V
#FUSES PUT //No Power Up Timer
#FUSES NOCPD //No EE protection
#FUSES STVREN //Stack full/underflow will cause reset
#FUSES NODEBUG //No Debug mode for ICD
#FUSES NOLVP //Low Voltage Programming on B3(PIC16) or B5(PIC18)
#FUSES NOWRT //Program memory not write protected
#FUSES NOWRTD //Data EEPROM not write protected
//#FUSES IESO //Internal External Switch Over mode enabled
#FUSES FCMEN //Fail-safe clock monitor enabled
//#FUSES PBADEN //PORTB pins are configured as analog input channels on RESET
#FUSES NOWRTC //configuration not registers write protected
#FUSES NOWRTB //Boot block not write protected
#FUSES NOEBTR //Memory not protected from table reads
#FUSES NOEBTRB //Boot block not protected from table reads
#FUSES NOCPB //No Boot Block code protection
#FUSES LPT1OSC //Timer1 configured for low-power operation
#FUSES MCLR //Master Clear pin enabled
#FUSES XINST //Extended set extension and Indexed Addressing mode enabled
//#FUSES CCP2C1
//#FUSES NOLPT1OSC
//#use delay(clock=4000000)
#use delay(crystal=4mhz)
//#use delay(clock=40000000,RESTART_WDT) |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Tue Apr 08, 2008 8:14 pm |
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This is a problem. The extended instruction set is not supported.
Using XINST will give erratic operation. Change the fuse to NOXINST.
Do this in all of your programs. |
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incubi
Joined: 08 Apr 2008
Posts: 8
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| Posted: Tue Apr 08, 2008 9:22 pm |
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Looks like that's it, man its always the little things 
Thanks for the help
incubi |
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incubi
Joined: 08 Apr 2008
Posts: 8
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| Posted: Tue Apr 08, 2008 10:19 pm |
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PCM programmer
Would you happen to know why adding a var at the top/global would stop the interrupt from working? Example,
| Code: |
#include "main.h"
#int_RTCC
byte myvar;
void RTCC_isr(void)
{
output_bit(PIN_D1,1);
Delay_Ms(500);
}
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Seems to kill the interrupt not sure why |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Tue Apr 08, 2008 11:00 pm |
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Yes. The #int_RTCC tells the compiler that the following function is
an interrupt function. You can't stick a global variable between the #int
statement and the function. Always put the #int statement on the line
just above the interrupt function. Example:
| Quote: |
#int_RTCC
void RTCC_isr(void)
{
output_bit(PIN_D1,1);
Delay_Ms(500);
} |
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incubi
Joined: 08 Apr 2008
Posts: 8
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| Posted: Wed Apr 09, 2008 3:50 am |
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Where was this kind of help back in the 90s when I was learning C 
Thanks PCM programmer,
incubi |
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