RTI on SH08 problem

[Cram]

Hi all,

I want to create a 256mS delay using the RTI modulo on a SH08, I don't eant an interrupt so I'll use pollins software solution.

I used the RTI modulo before but never get this error:

Error: At location FFCC -
Error: Attempt to use invalid or uninitialized memory

Error: Interrupt processing failed.
HALTED

The message apperas only when the RTICNT reaches the RTIMOd value and the RTFI flag should be set, If I disable the general interrupts I don't have the error.

Can anybody help me? Thxs in advance.

[i_kauf]

Hello Cram!

I do not understand C Language cause I write my programs in assembly language.

It seems to me that you dont initialize the Interrupt Vectors.

Try to initialize the interrupt Vector Table from 0xFFFE - 0xFFC0. In assembly language that should look like this:

RTC_ISR:

                   RTI

Vectorstart:  EQU   $FFC0

;**************************************************************
;*                 Interrupt Vectors for MC9S08SH8            *
;**************************************************************
            ORG   Vectorstart

            DC.W  spurious          ; 31  unuset/future used
            DC.W  spurious          ; 30  Vacamp
            DC.W  spurious          ; 29  unuset/future used
            DC.W  spurious          ; 28  unuset/future used
            DC.W  spurious          ; 27  unuset/future used
            DC.W  spurious          ; 26  Vmtim
            DC.W  RTC_ISR          ; 25  Vrtc
            DC.W  spurious          ; 24  Viic
            DC.W  spurious          ; 23  Vadc
            DC.W  spurious          ; 22  unuset/future used
            DC.W  spurious          ; 21  Vportb
            DC.W  spurious          ; 20  Vporta
            DC.W  spurious          ; 19  unuset/future used
            DC.W  spurious          ; 18  Vscitx
            DC.W  spurious         ; 17  Vscirx
            DC.W  spurious          ; 16  Vscierr
            DC.W  spurious          ; 15  Vspi
            DC.W  spurious          ; 14  Vtpm2ovf
            DC.W  spurious          ; 13  Vtpm2ch1
            DC.W  spurious          ; 12  Vtpm2ch0
            DC.W  spurious          ; 11  Vtpm1ovf
            DC.W  spurious          ; 10  unuset/future used
            DC.W  spurious          ; 9   unuset/future used
            DC.W  spurious          ; 8   unuset/future used
            DC.W  spurious          ; 7   unuset/future used
            DC.W  spurious          ; 6   Vtpm1ch1
            DC.W  spurious          ; 5   Vtpm1ch0
            DC.W  spurious          ; 4   unuset/future used
            DC.W  spurious          ; 3   Vlvd
            DC.W  spurious          ; 2   Virq
            DC.W  spurious          ; 1   SWI
            DC.W  _Startup          ; 0   Reset

Regards,

Ingo

[Cram]

Hi all,

I used the MTIM modulo to generate de delay time, and today I checked again with the RTI modulo, and everything is working fine.