[Sdcc-user] i can't use my ISR function... (still)

[Muhammad F. F. <m_f...@ho...>]

thanks Michael,

i tried the "critical" option but STILL the respond is not as i expected.
i guess i call functions from inside function that is called by my ISR, and 
i haven't make all the functions related to be "critical",  or should i ?

do you have any solution besides "critical" options ?

maybe this will help you to picture the situation:

1. mcu AT89C51, code max: 4Kbytes

2. command line : SDCC --model-small --code-loc 0xc000
   :) i use my own evaluation board, it runs well before using
      any interrupt routines

3. the code:

...

code unsigned char *LOGO1 = "logo 1";
code unsigned char *LOGO2 = "logo 2";
code unsigned char *INCOMING = "incoming";
volatile unsigned int  DELAY;                   // Global delaytime

...

void main(void)
{
    init_mcu();

    lcd_clear();             // clear display
    lcd_puts(4, 0, LOGO1);   // displays "logo 1"
    lcd_puts(0, 1, LOGO2);   // displays "logo 2"

    while (1);
}


void External0_ISR(void) interrupt 0  // lo-to-hi transition triggered
{
    lcd_clear();
    lcd_puts(4, 0, INCOMING);    // display "incoming"
    while(!RD1);                 // detect if the pin that generates
                                 // int_0 is still low
}


void Timer0_ISR(void) interrupt 1
{
    ET0 = 0;                     // Disable Timer0-interrupt
    if ( DELAY > 0 ) DELAY--;    // Timebase ticks for delay-routine
    ET0 = 1;                     // Enable Timer0-interrupt
}


void delay(unsigned int timer_base) // using timer_0 interrupt
{
    if ( timer_base == 0 ) return;
    DELAY = timer_base;
    while ( DELAY > 0 ) _asm nop _endasm;
}


void lcd_clear(void)            // Display Clear
{
//	unsigned char d = 0x01;
	send_command(0x01);
	delay(20);
#ifdef DATA_LENGTH_4
	send_command(0x10);
	delay(20);
#endif
}


void lcd_puts(unsigned char X,    // column position 0 - 15
              bit Y,	          // row position 0 - 1
              unsigned char *KAL) // string
{
    lcd_gotoxy(X,Y);
    while(*KAL) lcd_putch(*KAL++);
}


void send_command(unsigned char CMD)
{
	IREG = CMD; // CMD is sent to xdata
	delay(2);
}

...


4. that's all, any help is appreciated.


regards,
fahmy
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