8720, programming but not running

[Guest]

Hello everyone,

I bought recently the Microchip development board with pic8720 on it.

http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1406&dDocName=en010058&part=DM183020

I connected it with ICD2 and MPLAMB and wrote a simple code with ccs pic_c compiler PCH v3.082

#include <18F8720.h>

#use delay(clock=20000000)

#use fast_io(B)
#use fast_io(D)

#byte port_b=0x0f81
#byte port_d=0x0f83

/********* INIT PIC ***************/
void initpic(void)
{
setup_adc_ports(NO_ANALOGS);
setup_adc(ADC_OFF);
setup_psp(PSP_DISABLED);
setup_spi(SPI_SS_DISABLED);
setup_wdt(WDT_OFF);
setup_timer_0(RTCC_INTERNAL|RTCC_DIV_256|RTCC_8_BIT);
setup_timer_1(T1_DISABLED);
setup_timer_2(T2_DIV_BY_16,255,16);
setup_timer_3(T3_DISABLED|T3_DIV_BY_1);
}

void main()
{
initpic();
set_tris_d(0x00);
set_tris_b(0x00);

while(1)
{
output_high(PIN_B3);
output_d(0xff);
delay_ms(1000);
output_low(PIN_B3);
output_d(0x00);
delay_ms(1000);
}
}

the fuses are HS and power on reset all the others disabled.
i connect leds to pin_b3 and to port d.
i programm succesfull, but it doesnt run.
i mean havent checked it with debuger, but no led is going on anyway.

I would like to ask if i am doing something wrong, or is something that i missed, because is the first time that i use pic18f8720.

thank you in advance

[Mark]

Add this line near the top

#fuses HS, PUT, NOLVP, NOWDT

[Mark]

Did you also unplug the ICD2? It will hold the device in reset unless you click the release from reset on the tool bar. Also, do you have the jumper correct for the LEDs.

[Kostas K]

Thanks Mark,

I have done what you have suggested.

No luck.

I tried it in debbuger mode, and i found out that no code was written in program memmory, just a few RRRR

i also realized that after compilation i got an error about xxx.cod file
i choose in built options none or extended cod or coff, in the frist two choises i get the error that xxxx.cod couldnt found and in the third that xxx.cof couldnt found.

finally i loaded the demo source code from microchip which is in asm, and it worked fine.

any idea anyone?

thanks anyway