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Interrupt vector redirection problems

Aw S

Hello! I use XC167CI and wrote bootloader described in C166: SHARE INTERRUPT VECTOR WITH BOOT LOADER http://www.keil.com/support/docs/2881.htm
Differences with my code are:

VEC_SEG  EQU 192
VEC_OFF  EQU 4000H

my irq_redir.a66 consist of

?PR?irq8 section code
irq8 proc near
  JB   boot,irq8_boot
  JMPS VEC_SEG,VEC_OFF+20H
irq8_boot:
  JMP  irq
irq8 endp
?PR?irq8 ends

When compiling linker gives error:

*** ERROR L121: IMPROPER FIXUP
    MODULE:  .\Object\irq_redir.obj (IRQ_REDIR)
    SECTION: ?PR?IRQ8
    CLASS:
    OFFSET:  000AH


May be I missed something?

Parents
  • 0 in reply to Chris Wunderlich

    I think that it's more handy method because of united location for all address assignments. I'll try it.
    But my interrupt doesn't work. I added GPT timer T6 to my project and changed assembler file.
    irq_redir.a66

    VEC_SEG  EQU 192
VEC_OFF  EQU 4000H
; The RESET vector is used by the boot application
VECT_TAB SECTION CODE AT 0C00004H
VEC_PROC PROC
  JMPS VEC_SEG,VEC_OFF+004H
  JMPS VEC_SEG,VEC_OFF+008H
...
  JMPS VEC_SEG,VEC_OFF+094H
  JMPS #SEG irq8, #SOF irq8        ; irq8
  JMPS VEC_SEG,VEC_OFF+09CH
...
VEC_PROC ENDP
VECT_TAB ENDS

extrn boot:bit
extrn T6irq:far

?PR?irq8 section code at 0C00500H
irq8 proc near
  JB   boot,irq8_boot
  JMPS VEC_SEG,VEC_OFF+098H
irq8_boot:
  JMPS  #SEG T6irq, #SOF T6irq
irq8 endp
?PR?irq8 ends

    and in main.c


    
void far T6irq(void) interrupt irq=CACHED
    
{
  P2_8 = !P2_8;  // LED on/off
    
}

    In the debugger (OCDS) I see proper ports initialisation, T6 runs, T6 inerrupt request flag is set when T6 overflow, program runs (in infinite loop) but there is no entering to T6 interrupt handler.

Reply
  • 0 in reply to Chris Wunderlich

    I think that it's more handy method because of united location for all address assignments. I'll try it.
    But my interrupt doesn't work. I added GPT timer T6 to my project and changed assembler file.
    irq_redir.a66

    VEC_SEG  EQU 192
VEC_OFF  EQU 4000H
; The RESET vector is used by the boot application
VECT_TAB SECTION CODE AT 0C00004H
VEC_PROC PROC
  JMPS VEC_SEG,VEC_OFF+004H
  JMPS VEC_SEG,VEC_OFF+008H
...
  JMPS VEC_SEG,VEC_OFF+094H
  JMPS #SEG irq8, #SOF irq8        ; irq8
  JMPS VEC_SEG,VEC_OFF+09CH
...
VEC_PROC ENDP
VECT_TAB ENDS

extrn boot:bit
extrn T6irq:far

?PR?irq8 section code at 0C00500H
irq8 proc near
  JB   boot,irq8_boot
  JMPS VEC_SEG,VEC_OFF+098H
irq8_boot:
  JMPS  #SEG T6irq, #SOF T6irq
irq8 endp
?PR?irq8 ends

    and in main.c


    
void far T6irq(void) interrupt irq=CACHED
    
{
  P2_8 = !P2_8;  // LED on/off
    
}

    In the debugger (OCDS) I see proper ports initialisation, T6 runs, T6 inerrupt request flag is set when T6 overflow, program runs (in infinite loop) but there is no entering to T6 interrupt handler.

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