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nmeyer
Joined: 09 Jul 2004
Posts: 70
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| PIC16F690 I2C and compiler versions |
 Posted: Tue Dec 15, 2009 10:31 am |
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I have a project where I am using the I2C of the PIC16F690 using
| Code: |
#use i2c(SLAVE,FORCE_HW,fast,sda=PIN_B4,scl=PIN_B6,address=0x12,RESTART_WDT,stream=ex)
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for my I2C. I worked on the project about 2 years ago and I had an I2C host device that I used to test the code. It all appeared to work well. Now some issues have come up and I am trying to debug the project. But now I can not get any of communications happening with any new program I compile. If I load an old hex file into the PIC and run it, it will communicate fine. If I take that same code and recompile it and make no other changes, it won't communicate. I have tried different versions of compiler but that does not seem to make a differece. The code that I know worked was done on V4.060 and I do not have a copy of that. I have V4.058 and V4.062 and some V4.08x's. Does anyone have a thought of why this might be happening? |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Tue Dec 15, 2009 12:19 pm |
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My guess is that you're probably not using the same source code
as was used to create the original .HEX file.
Did you keep the original .LST file, compiled with vs. 4.060 ? |
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nmeyer
Joined: 09 Jul 2004
Posts: 70
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| Posted: Tue Dec 15, 2009 12:44 pm |
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I have looked at this and it is the same source code. I found that it was compiler V4.062 that I made the original files in and I do have that version. So I have recompiled the program and performed a file compare of the lst files and found this difference:
| Code: |
.................... ////////////////////////////////////////////////////////////////////////////////
.................... #INT_SSP
.................... void ssp_interupt (void) //detect external smbus activity
.................... {
.................... BYTE incoming, state;
....................
.................... state = i2c_isr_state();
*
D <! 0044: BSF 03.5
0045: BTFSC 14.5
0046: GOTO 04C
D <! 0047: BCF 03.5
0048: CLRF 67
0049: BTFSC 13.0
004A: BSF 67.7
D <! 004B: BSF 03.5
D <! 004C: BCF 03.5
004D: MOVF 67,W
004E: INCF 67,F
004F: MOVWF 6F
*
05A4: MOVLW 03
05A5: MOVWF 67
.................... if(state < 0x80) //Master is sending data
* |
with the D<! being in the original list file but not the newly compiled list file. This is the only difference I find in list files. Being that it is in the Int_ssp code, I am sure that it is what is causing the issue, but I do not know what it means, or why there is the difference between the two list files. |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Tue Dec 15, 2009 12:56 pm |
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| Quote: | | with the D<! being in the original list file but not the newly compiled list file |
I made a little test program and compiled it with vs. 4.062.
The .LST file does have all the Bank Select lines that you say your
newly compiled (with 4.062) code doesn't have. In other words, I am
able to duplicate your "original" code that has the bank select lines.
Compile the test program shown at the end of this post. See if you
get the same code as shown in the .LST file below.
| Code: | .................... void ssp_isr(void)
.................... {
.................... int8 state;
....................
.................... state = i2c_isr_state();
0037: BSF 03.5
0038: BTFSC 14.5
0039: GOTO 03F
003A: BCF 03.5
003B: CLRF 2E
003C: BTFSC 13.0
003D: BSF 2E.7
003E: BSF 03.5
003F: BCF 03.5
0040: MOVF 2E,W
0041: INCF 2E,F
0042: MOVWF 2F
*
0068: MOVLW 03
0069: MOVWF 2E |
Here's the test program:
| Code: |
#include <16F690.h>
#fuses HS,NOWDT,NOPROTECT
#use delay(clock=20000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7)
//#use i2c(SLAVE, SDA=PIN_C4, SCL=PIN_C3, address=0xa0)
#use i2c(SLAVE,FORCE_HW,fast,sda=PIN_B4,scl=PIN_B6,address=0x12,RESTART_WDT,stream=ex)
#INT_SSP
void ssp_isr(void)
{
int8 state;
state = i2c_isr_state();
}
//===============================
void main ()
{
while(1);
} |
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nmeyer
Joined: 09 Jul 2004
Posts: 70
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| Posted: Tue Dec 15, 2009 1:07 pm |
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yes, i do get the same thing
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.................... void ssp_isr(void)
.................... {
.................... int8 state;
....................
.................... state = i2c_isr_state();
0037: BSF 03.5
0038: BTFSC 14.5
0039: GOTO 03F
003A: BCF 03.5
003B: CLRF 2E
003C: BTFSC 13.0
003D: BSF 2E.7
003E: BSF 03.5
003F: BCF 03.5
0040: MOVF 2E,W
0041: INCF 2E,F
0042: MOVWF 2F
*
0068: MOVLW 03
0069: MOVWF 2E
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But this is the section out of the recompiled V4.062 code and they are not there
| Code: |
.................... void ssp_interupt (void) //detect external smbus activity
.................... {
.................... BYTE incoming, state;
....................
.................... state = i2c_isr_state();
*
0044: BTFSC 00.5
0045: GOTO 049
0046: CLRF 67
0047: BTFSC 00.0
0048: BSF 67.7
0049: MOVF 67,W
004A: INCF 67,F
004B: MOVWF 6F
*
05A0: MOVLW 03
05A1: MOVWF 67
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Tue Dec 15, 2009 1:15 pm |
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You have some weird stuff there, where it's testing registers "00" instead
of the correct register addresses.
I would say, re-install the compiler. |
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nmeyer
Joined: 09 Jul 2004
Posts: 70
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| Posted: Tue Dec 15, 2009 2:50 pm |
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| I am not sure what is going on. I have three different computers one with V4.062, one with V4.086 and another with V4.093. The one with V4.093 compiles it correctly and gives a good work file. No matter what I put on the other two, I always get the bad list file. |
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