conditional compile

[adrian]

I have a question about conditional compile.

I am trying to use a conditional compile to enable printf for use as debug statements whilst I am developing my product. No ICD's involved here! The conditional compile will be removed for production programming as there will be no RS232 interface on the production system.

I enable debug via #define DEBUG_LEVEL_1 and disable by commenting out the line. This #define is declared in the project.h file.
Debug printing is thereby controlled via....
#ifdef DEBUG_LEVEL_1
printf("mains = %lu\n\r",clock_ticks);
#endif

However, I find that this arrangement only works in 'main'. If I try and use it within a function called from 'main', I get the following error message....
Error[132] STDOUT not defined (may be missing #USE RS232).

I am using PCM v3.148 and MPLab 5.70.40.

Any suggestions anybody?

[Ttelmah]

[adrian]

Yep that solved it.

I just logged back on, after I figured out the answer, to give an update.

I had the following in my hardware initialisation subroutine...
//conditional compile
//if DEBUG is enabled, use GPIO_4 on pin 3 for RS232 duty using software USART
#ifdef DEBUG_LEVEL_1
#use rs232(baud=9600,xmit=PIN_A4) //-> debug RS232 on pin 3
#endif

//if DEBUG is not enabled, use GPIO_4 on pin 3 as relay driver
#ifndef DEBUG_LEVEL_1
#define RELAY PIN_A4 // use PIN 3 as an output
#endif

Shifting the #use rs232(baud=9600,xmit=PIN_A4) into my project.h solved the printing problem.

This now leads onto a further question. If I put the #use RS232 statement in the project.h file, can I leave the conditional compile statement for GPIO_4 (to be configured as a Relay output) in my hardware initialisation routine? Or do I have to comment out both the #define DEBUG_LEVEL_1 and #use RS232? If I comment out the #define DEBUG_LEVEL_1, but leave in the #use RS232, what will happen to GPIO_4? Which takes control of the port pin, the #define RELAY PIN_A4 or the use RS232?