enable_interrupt(global) PROBLEM!

[Franz]

I use 2 serial in my Pic 16f876 :
The first is hardware the second is software for PRINTER.
My program is:



/* -----------------------------------------------------------------------
Inizializzazione Dispositivo Pic
--------------------------------------------------------------------------*/
void initDevice (void)
{
setup_adc_ports(NO_ANALOGS);
setup_adc(ADC_CLOCK_DIV_32);
setup_spi(FALSE);
setup_counters(RTCC_INTERNAL,WDT_2304MS);//576MS
setup_timer_1(T1_INTERNAL|T1_DIV_BY_8); // Tick 8us
setup_timer_2(T2_DISABLED,0,1);
setup_ccp1(CCP_OFF);
setup_ccp2(CCP_OFF);
enable_interrupts(INT_RDA);
enable_interrupts(INT_TIMER1);
enable_interrupts(global);
set_tris_a (IO_PORTA) ;
set_tris_b (IO_PORTB) ;
set_tris_c (IO_PORTC) ;
}




//////////////////////////////////

void initPrn (uchar col) //inizializza stampante
{


disable_interrupts( global );

// tempo di attesa necessario per reset stampante
delay_ms(2000);


// seleziona colonne (0x69 x40col / 0x49 x24col)
if (col == 40)
{
putc (0x1B) ;
putc (0x69) ;
}
else if (col == 24)
{
putc (0x1B) ;
putc (0x49) ;
}


// seleziona la modalità di stampa capovolto
putc (0x1b) ;
putc (0x52) ;

enable_interrupts (global);

}



/////////

void main ( void )
{
initDevice () ;
initPrn (24);
..........

Why if I call the function initPrn(24), the device not answer at the serial interrupt ( INT_RDA )?
( I must use disable_interrupts ( global ) and enable_interrupts( global );
because the routines is software and it isn't always correct).

Thanks and sorry for my BAD ENGLISH .

[DragonPIC]

INT_RDA does not work after initPrn (24); has returned? Global enables or disables any and all interrupts. Have you used #USE RS232? Some of your code seems to be missing.

If you have 2 RS232 ports, you need a steam. See fgetc() and fputc
() in user manual.


and configure each port separately using:

#USE RS232 (baud=9600,xmit=pin,rcv=pin,stream=COM)

stream is to identify each port.

[Franz]

Yes my funcion return in the main.
Yes i write #USE RS232 for configure each port separately but I don't USE stream. But i don't understand the manual, I write only 1 o two byte not a long string.