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18F45J10 write_program_memory() compiles to nothing

 
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mfer



Joined: 11 Jan 2007
Posts: 8

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18F45J10 write_program_memory() compiles to nothing
PostPosted: Thu Jan 11, 2007 8:05 am     Reply with quote

Hello,

I've seen similar problems here in many-many posts, but couldn't find a solution for my problem yet.

I'm trying to use the followings:

---------------------------------------------

void main()
{
int32 address;
int8 count;
int8 buffer[0x100];

address=0;
count=0x40;
read_program_memory(address,buffer,count);
address=0x1000;
count=0x40;
write_program_memory(address,buffer,count);
}

---------------------------------------------

And the call write_program_memory compiles to this:

---------------------------------------------

0024: GOTO 00E0 (RETURN)

.................... write_program_memory(address,buffer,count);
00C6: MOVFF 07,10C
00CA: MOVFF 06,10B
00CE: MOVLB 1
00D0: CLRF x0E
00D2: MOVLW 0B
00D4: MOVWF x0D
00D6: CLRF x10
00D8: MOVFF 0A,10F
00DC: MOVLB 0
00DE: BRA 0024

00E0: SLEEP
---------------------------------------------

funny, isn't it?

processor: 18F45J10
pcwh version: 4.019

Thanks in advance for any info! (even if you draw my attention to a post containing the solution, but slipped my attention)

mfer
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Thu Jan 11, 2007 5:32 pm     Reply with quote

It worked OK for me. I took your code and dropped it into
a short test program and compiled it with PCH vs. 4.019.
Code:

#include <18F45J10.h>
#fuses HS, NOWDT   
#use delay(clock=20000000)

//====================
void main()
{
int32 address;
int8 count;
int8 buffer[0x100];

address=0;
count=0x40;
read_program_memory(address,buffer,count);
address=0x1000;
count=0x40;
write_program_memory(address,buffer,count);

while(1);
}


I got the following code in the .LST file:
Code:

... void main() 
... { 
0028:  CLRF   FF8
002A:  BCF    FD0.7
002C:  CLRF   FEA
002E:  CLRF   FE9
0030:  MOVF   FC1,W
0032:  ANDLW  C0
0034:  IORLW  0F
0036:  MOVWF  FC1
0038:  MOVLW  07
003A:  MOVWF  FB4
... int32 address; 
... int8 count; 
... int8 buffer[0x100]; 
... 
... address=0; 
003C:  CLRF   09
003E:  CLRF   08
0040:  CLRF   07
0042:  CLRF   06
... count=0x40; 
0044:  MOVLW  40
0046:  MOVWF  0A
... read_program_memory(address,buffer,count); 
0048:  MOVFF  08,FF8
004C:  MOVFF  07,FF7
0050:  MOVFF  06,FF6
0054:  CLRF   FEA
0056:  MOVLW  0B
0058:  MOVWF  FE9
005A:  MOVLB  1
005C:  CLRF   x0C
005E:  MOVFF  0A,10B
0062:  MOVLB  0
0064:  BRA    0004
... address=0x1000; 
0066:  CLRF   09
0068:  CLRF   08
006A:  MOVLW  10
006C:  MOVWF  07
006E:  CLRF   06
... count=0x40; 
0070:  MOVLW  40
0072:  MOVWF  0A
... write_program_memory(address,buffer,count); 
0074:  MOVFF  07,10C
0078:  MOVFF  06,10B
007C:  MOVLB  1
007E:  CLRF   x0E
0080:  MOVLW  0B
0082:  MOVWF  x0D
0084:  CLRF   x10
0086:  MOVFF  0A,10F
008A:  MOVLB  0
008C:  BRA    0024
... while(1);
008E:  BRA    008E
... }
mfer



Joined: 11 Jan 2007
Posts: 8

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not convinced yet :)
PostPosted: Thu Jan 11, 2007 11:43 pm     Reply with quote

Hello,

You only missed the main part:
what is at 0x0024?
There should be the writing sequence itself.

Did you burn it into the pic and it did the writing properly?

mfer
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Fri Jan 12, 2007 12:55 am     Reply with quote

You're right. It's not there. I didn't comment out the #nolist when I
posted that reply. I did now, and it's definitely missing the code.
It's not fixed in vs. 4.020 either.

I was going to offer to write a substitute routine for you over the weekend
but I just took a quick look at the data sheet and it appears to be a bit
more complicated than normal in that area. There are more caveats.
The data sheet gives an example of ASM code. It should be possible
to write a routine using that example. I just don't think I have the time
to commit to do it. I have got too much to do on Friday and on Sunday
as well (at work).
mfer



Joined: 11 Jan 2007
Posts: 8

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shall I report it as a bug?
PostPosted: Fri Jan 12, 2007 1:04 am     Reply with quote

Hello,

Do you think I should report it as a bug?

I would be curious to see your replacement code, and next week would be all right.

Thank you for your help so far!!

mfer
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

View user's profile Send private message

PostPosted: Fri Jan 12, 2007 1:09 am     Reply with quote

Yes, you should report it.

Actually, I edited my post and revised it a bit in the area of promises
just before you posted your latest response. Mr. Green
Most of my time is already pre-committed on Friday (a customer needs
some boards repaired that day) and I'm supposed to get a schematic
done as well. Sunday is also committed. I can work on it, but it will be
later next week.
mfer



Joined: 11 Jan 2007
Posts: 8

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I'll report it then
PostPosted: Fri Jan 12, 2007 1:38 am     Reply with quote

Hello,

No problem, I will do it from the datasheet, I just was curious to see your solution. You know, one can always learn from others.

mfer
mburton
Guest







PostPosted: Tue Jan 30, 2007 1:47 pm     Reply with quote

I'm having exactly the same problem with the PIC18F24J10, using compiler 3.249. No error messages or indications at all - very annoying.

Did you get your solution to work? If so, could you post your code fragment?

Thanks.


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