Re: This program works on PCW 2 but not PCML 3

[Justin Dobbs]

Has anyone experienced problems with PCML 3.055? I have
the following program:

#include "devices/16f877.h"
#include "drivers/stdio.h"
#fuses NOWDT,HS,NOPROTECT
#use delay(clock=20000000)
#use fast_io(E)

int8 pe;
#byte pe=0x09

main()
{
set_tris_e(0x00);
output_high(PIN_E0); // oops i should have
// taken this out before
while (1)
{
pe=0;
delay_ms(1000);
pe=0x07;
delay_ms(1000);
}
}

This blinks the 3 LED's attached to pins RE1-3 on and off... that is, when I compile it with PCW 2. If I compile the exact same program in PCML (linux) 3.055 and burn the same HEX file into the PIC chip, it doesn't work.

I have tried converting the HEX file to ms-dos text format with unix2dos before sending it to the Windows box and it changes the HEX printout in PICwriter but makes no difference as far as functionality is concerned. I am loading the hex file into PICWriter 1.1 and using a Parallax PIC programmer to burn the code into the chip on a separate Windows box, even though I am compiling on Linux.

Here are the hex files:

<a href="http://max.jrd.com/ledtest-good.hex">ledtest-good.hex</a>
<a href="http://max.jrd.com/ledtest-good.lst">ledtest-good.lst</a>
<a href="http://max.jrd.com/ledtest-bad.hex">ledtest-bad.hex</a>
<a href="http://max.jrd.com/ledtest-bad.lst">ledtest-bad.lst</a>

Thanks,
Justin Dobbs
Glacier Bay, Inc.
___________________________
This message was ported from CCS's old forum
Original Post ID: 991

[Tomi]

<font face="Courier New" size=-1>I don't have PCML but I took a short look on your list files and I have seen 3 differences. Any of these diffs is enough to lack your program:
1. The delay_ function is only a RETURN instead of the delay loops:
.................... #use delay(clock=20000000)
0004: RETLW 00
2. The PIC initialisation at the start of the main() is completely missing:
.................... main()
.................... {
.................... set_tris_e(0x00);
0005: MOVLW 00
3. At your delay_ms(1000) call at least two lines are missing:
0009: MOVLW FA
000A: MOVWF 22
000B: CALL 004
The right code:
0038: MOVLW 04
0039: MOVWF 21
003A: MOVLW FA
003B: MOVWF 22
003C: CALL 004
003D: DECFSZ 21,F
003E: GOTO 03A
Additionally Linux version uses a strange kind of bit addressing but it could be O.K.:
.................... set_tris_e(0x00);
0005: MOVLW 00
0006: BSF 03.5 // points instead of the colon
0007: MOVWF 09
0008: BCF 03.5
Report your bugs to CCS.

:=Has anyone experienced problems with PCML 3.055? I have
:=the following program:
:=
:=#include "devices/16f877.h"
:=#include "drivers/stdio.h"
:=#fuses NOWDT,HS,NOPROTECT
:=#use delay(clock=20000000)
:=#use fast_io(E)
:=
:=int8 pe;
:=#byte pe=0x09
:=
:=main()
:={
:= set_tris_e(0x00);
:= output_high(PIN_E0); // oops i should have
:= // taken this out before
:= while (1)
:= {
:= pe=0;
:= delay_ms(1000);
:= pe=0x07;
:= delay_ms(1000);
:= }
:=}
:=
:=This blinks the 3 LED's attached to pins RE1-3 on and off... that is, when I compile it with PCW 2. If I compile the exact same program in PCML (linux) 3.055 and burn the same HEX file into the PIC chip, it doesn't work.
:=
:=I have tried converting the HEX file to ms-dos text format with unix2dos before sending it to the Windows box and it changes the HEX printout in PICwriter but makes no difference as far as functionality is concerned. I am loading the hex file into PICWriter 1.1 and using a Parallax PIC programmer to burn the code into the chip on a separate Windows box, even though I am compiling on Linux.
:=
:=Here are the hex files:
:=
:=<a href="http://max.jrd.com/ledtest-good.hex">ledtest-good.hex</a>
:=<a href="http://max.jrd.com/ledtest-good.lst">ledtest-good.lst</a>
:=<a href="http://max.jrd.com/ledtest-bad.hex">ledtest-bad.hex</a>
:=<a href="http://max.jrd.com/ledtest-bad.lst">ledtest-bad.lst</a>
:=
:=Thanks,
:=Justin Dobbs
:=Glacier Bay, Inc.</font>
___________________________
This message was ported from CCS's old forum
Original Post ID: 1001