8-bit MicrocontrollersのトピックRe: JM60 and keyboard interrupt

JM60 and keyboard interrupt

donw — Wed, 05 Nov 2008 06:14:10 GMT

I am using the DEMOJM60 kit and trying to get a keyboard interrupt from
PORTA 4, to take the micro out of STOP mode.
I have followed code from a 908JL8 program which works OK.
I cannot cause an interrupt.
Initialise code:
       CLR     KBISC             ;SETUP PORT A4 RXD INT
        CLR    KBIES               ;FALLING EDGE INCASE GLITCH WHILE PULLUP TURNS ON

        CLR   PTADD
        LDA    #$20            ;PULLUP R PORTA4
        STA    PTAPE
        STA    KBIPE               ;A4 INT enable
        LDA    #4       ;KBISC_KBACK
        STA    KBISC              ;CLR FALSE INT
        ORA    #2          ;KBISC_KBIE
        STA     KBISC              ;INT ON
CLI
        STOP
         ....

At the start of the program I have enabled STOP mode:
        LDA     #$20    ;ALLOW STOP MODE
        STA     SOPT1


What am I missing?

Re: JM60 and keyboard interrupt

Ake — Wed, 05 Nov 2008 16:49:22 GMT

Hi,

I looked in the MC9S08JM60 manual, Figure 9-1, and what I can see the KBI is connected to port B4/5, port D2/3 and port G0/1/2/3.

Port A4 is not connected to the keyboard interrupt module.

Or have I missed something?

Regards,

Ake

Re: JM60 and keyboard interrupt

donw — Thu, 06 Nov 2008 03:34:43 GMT

Yes you are correct!
I assumed this micro used PORTA (like many others) for keyboard ints!
Thanks.