8-bit MicrocontrollersのトピックRe: Problems with P&E's simulator

Problems with P&E's simulator

peg — Sat, 25 Mar 2006 15:11:26 GMT

Hi all,

I believe I have found 2 problems with P&E Micro's ICS08QT/QY ICS V1.16

The first is that the OSC2EN bit of PTAPUE register is implemented in reverse.

The second is that level sensitive KB interrupts are implemented for both levels, i.e. interrupt triggers constantly.

Here is the minimal code that exposes both problems:

$Include 'qtqy_registers.inc'
ORG $F800
* compile this then start simulator on this
* issue var porta
* issue var ptapue
* issue inputa ff
* now step through code
Start NOP    ;at this point porta in variables window shows %00111111
*     ;this is correct as only lower 6 bits are implemented
lda #$00   ;keeps simulator quiet when interrupt occurs
       ldhx    #$0000   ;ditto
CLR PORTA   ;not really required here
mov #%00000000,DDRA  ;Port A all ins
mov #%00111111,PTAPUE ;pullup all
NOP    ;at this point porta in variables window shows %00101111
*     ;this is wrong as bit 4 should work as an input
mov #%10111111,PTAPUE ;pullup all and enable OSC2 on PTA4
NOP    ;at this point porta in variables window shows %00111111
*     ;this is wrong as bit 4 should be outputting OSC
*     ;now continue to expose next problem
bset 1,KBSCR   ;mask keyboard interrupts
bset 0,KBSCR   ;set to edge and low level sensitive
*     ;if you comment out the above line edge sensitive KBI works as advertised
bset 2,KBIER   ;enable ints on A2

* blah,blah

bset 2,KBSCR   ;ack int just in case
bclr 1,KBSCR   ;unmask kbd ints
CLI    ;as soon as you get to here you will be locked in KBI int no matter what
*     ;level is on A2
bra *

kbi_int
BSET 2,KBSCR ;ack int
NOP
rti

org $FFE0

dw kbi_int

org $FFFE

dw Start ; Reset

This is the current version (i believe) and seems to be a couple of years old.

Has anybody else experienced this?

Or am I missing something?

BR Peg

Re: Problems with P&E's simulator

bigmac — Sun, 26 Mar 2006 23:44:32 GMT

Hello Peg,

Are you operating with "simulation only", or are you driving some hardware? I am reminded that, for the MMEVS with the M68EML08QTQY emulation module, two of the vector locations have been moved, including the KBI vector (to $FFE4). I wonder if part of your problem might be of this nature.

Regards,
Mac

Re: Problems with P&E's simulator

peg — Mon, 27 Mar 2006 17:27:02 GMT

Hi Mac,

Simulation only!

The KBI problem I found several months ago and know my code works on real hardware. In full simulation you only get to simulate your KBI interrupt code over and over once you set level sensitive.

The OSC2EN problem I only discovered the other day after I sent every device I had out for field testing. They reported an issue so I was doing a full simulation and found 1 input didn't work in the simulation.

BR,

Peg

Re: Problems with P&E's simulator

peg — Sat, 08 Apr 2006 07:47:16 GMT

Hi all,

These two issues have now been acknowledged by Mark Cukier of P&E and have been noted for correction in the next release.

BR Peg