ICD problem with PRINTF function

[ik1wvq]

hi friends,
i have a little problem with CCS debugger:

PCWH 3.184
PIC18F252
ICD-U40

i try with this trivial code:

#nclude <18F252.h>
#fuses HS,NOWDT,NOPROTECT,NOLVP,WDT128,BROWNOUT,NOCPD
#device *=16 ADC=10 CCSICD=true
#opt 9
#IGNORE_WARNINGS 203
#use delay(clock=10000000,RESTART_WDT)
#use rs232(baud=9600,xmit=PIN_C6,rcv=PIN_C7,errors, restart_wdt)

int8 counter1=0;

void main(void)
{

disable_interrupts(global);
SET_UART_SPEED(9600);

while (true) // trivial loop
{
restart_wdt();
counter1++;
printf("hello %u \n\r",counter1);
delay_ms(1000);
}
}

if i execute "single step (f7)" or "step over (f8)" the target execution hang when executing the "PRINTF" instruction... i must stop the debugger execution and restart it.

I DONT USE THE TERMINAL WINDOWS OF THE DEBUGGER, BUT
A TERMINAL PROGRAM CONNECTED VIA SERIAL PORT TO MY BREADBOARD SERIAL OUTPUT.

note please what if i move the printf in a separate function the "step over" work Ok, but the "single step" hang again on the printf instruction.. this is the modified code:


void f1(void)
{
printf("hello %u \n\r",counter1);
}


void main(void)
{

disable_interrupts(global);
SET_UART_SPEED(9600);

while (true) // trivial loop
{
restart_wdt();
counter1++;
f1();
delay_ms(1000);
}
}


anyone know this problem and (possibly) a solution ???
sorry for my bad english !
thanks and regards

Mauro

[Douglas Kennedy]

This is a recurring issue. Any printf lines in the code make it basically unsteppable and therefore not easily debugable. A year or so back there was a brief versioning window when it would step over both print and delayus delayms but it regressed back to not working. I wrap all printf's with a compile time test #if.... #endif it helps but it really needs to be handled with special handling in the debug compile and debug firmware