Hi,
I found the problem myself. SDCC uses interrupt 1 to high priority and
interrupt 2 to low priority. I was based on wrong examples found at
internet.
cheers,
Alan
2007/10/13, Alan Carvalho de Assis <[EMAIL PROTECTED]>:
> Hi,
> I'm found two approaches to implements an interrupt handler on sdcc,
> but none is working here.
>
> The first one is this:
>
> void timer_intr() interrupt 0 {
> LED_PIN ^= 1;
> INTCONbits.T0IF = 0;
> }
>
> But when compiling I get this error:
>
> sdcc -mpic16 -p18f2680 -V -Wl-c -I/home/alan/pic/inte/ -ointe.hex inte.o
> message: using default linker script "/usr/share/gputils/lkr/18f2680.lkr"
> error: multiple sections using address 0
>
> So looking at inte.asm file we see:
>
> ;--------------------------------------------------------
> ; interrupt vector
> ;--------------------------------------------------------
>
> ;--------------------------------------------------------
> ; global & static initialisations
> ;--------------------------------------------------------
> ; ; Starting pCode block for absolute section
> ; ;-----------------------------------------
> S_inte_ivec_0x0_timer_intr code 0X000000
> ivec_0x0_timer_intr:
> GOTO _timer_intr
>
> ; I code from now on!
> ; ; Starting pCode block
> S_inte__main code
> _main:
> ; .line 82; inte.c RCONbits.IPEN = 1;
> BSF _RCONbits, 7
> ; .line 85; inte.c INTCONbits.GIEH = 1;
> BSF _INTCONbits, 7
> ; .line 88; inte.c INTCONbits.T0IE = 1;
> BSF _INTCONbits, 5
>
> Really the _timer_intr is not placed at 0x000008 but 0X000000.
>
>
> The second approach is this:
>
> DEF_INTHIGH(high_int)
> DEF_HANDLER(SIG_TMR0, _tmr0_handler)
> END_DEF
>
> SIGHANDLER(_tmr0_handler)
> {
> LED_PIN ^= 1;
> INTCONbits.T0IF = 0;
> }
>
> Now the compilation goes fine and the interrupt handle address is
> placed at 0x000008.
>
> But the timer0 is not generating interruptions for me. I'm sending my
> file below.
>
> What is the right solution to fix this problem?
>
> Cheers,
>
> Alan
>
> #include <pic18f2680.h>
> #include <signal.h> // for interrupt
>
> // ------------------------------------------------
> // change these if you're wiring the LED to other pin
>
> #ifndef LED_TRIS
> #define LED_TRIS TRISAbits.TRISA0
> #endif
>
> #ifndef LED_PIN
> #define LED_PIN PORTAbits.RA0
> #endif
>
> // ------------------------------------------------
> // configuration for PIC18F2680
> // xtal based, PLL enabled (for xtal to max 10 MHz, for higher xtal
> freqencies use _OSC_HS_1H )
> code char at __CONFIG1H _conf1 = _OSC_HS_1H & //_OSC_HSPLL_1H &
> _IESO_OFF_1H &
> _FCMEN_ON_1H;
>
> code char at __CONFIG2L _conf2 = _BOREN_BOHW_2L &
> _BORV_1_2L; // 4.3 V
>
> code char at __CONFIG2H _conf3 = _WDTPS_1_2H &
> _WDT_OFF_2H;
>
> code char at __CONFIG3H _conf4 = _MCLRE_ON_3H &
> _LPT1OSC_OFF_3H &
> _PBADEN_OFF_3H;
>
> code char at __CONFIG4L _conf5 = _LVP_ON_4L &
> _XINST_OFF_4L & // extended instruction set
> off => if enabled,
> your sdcc compiled programm will not work properly!
> _STVREN_OFF_4L;
>
> code char at __CONFIG5L _conf6 = _CP0_OFF_5L &
> _CP1_OFF_5L &
> _CP2_OFF_5L &
> _CP3_OFF_5L;
>
> code char at __CONFIG5H _conf7 = _CPB_OFF_5H &
> _CPD_OFF_5H;
>
> code char at __CONFIG6L _conf8 = _WRT0_OFF_6L &
> _WRT1_OFF_6L &
> _WRT2_OFF_6L &
> _WRT3_OFF_6L;
>
> code char at __CONFIG6H _conf9 = _WRTB_OFF_6H &
> _WRTC_OFF_6H &
> _WRTD_OFF_6H;
>
> code char at __CONFIG7L _conf10 = _EBTR0_OFF_7L &
> _EBTR1_OFF_7L &
> _EBTR2_OFF_7L &
> _EBTR3_OFF_7L;
>
> code char at __CONFIG7H _conf11 = _EBTRB_OFF_7H;
>
>
> DEF_INTHIGH(high_int)
> DEF_HANDLER(SIG_TMR0, _tmr0_handler)
> END_DEF
>
> SIGHANDLER(_tmr0_handler)
> {
> LED_PIN ^= 1;
>
> // Clear interrupt flag;
> INTCONbits.T0IF = 0;
> }
>
> void main() {
> // Enables priority levels on interrupts
> RCONbits.IPEN = 1;
>
> // Enables high priority interrupts
> INTCONbits.GIEH = 1;
>
> // Enables the TMR0 overflow interrupt
> INTCONbits.T0IE = 1;
>
> //set timer overflow
> TMR0H = 10;
> TMR0L = 0;
>
> //clear T0CON
> T0CON = 0;
> //set prescaler to 1:256
> T0CONbits.T0PS0 = 1;
> T0CONbits.T0PS1 = 1;
> T0CONbits.T0PS2 = 1;
>
> //wait until bit clear
> while(INTCONbits.T0IF)
> INTCONbits.T0IF = 0;
>
> //timer on
> T0CONbits.TMR0ON = 1;
>
> // set pin to output
> LED_TRIS = 0;
>
> //turn led on
> LED_PIN = 1;
>
> while(1) {
>
> }
> }
>
-------------------------------------------------------------------------
This SF.net email is sponsored by: Splunk Inc.
Still grepping through log files to find problems? Stop.
Now Search log events and configuration files using AJAX and a browser.
Download your FREE copy of Splunk now >> http://get.splunk.com/
_______________________________________________
Sdcc-user mailing list
Sdcc-user@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/sdcc-user
