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championx
Joined: 28 Feb 2006
Posts: 151
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| 16F876A + bootloader |
 Posted: Tue Sep 11, 2012 1:29 pm |
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Hi! I'm trying to use the bootloader provided by ccs on a 16F876A.
I have used it with no problem on a 18F252, 18F258, 18F2680, 18F2685 and 18F2682.
But i cant make it work on a 16F876A.
At first i got the "out of rom" message, so i just change the values on the org and loader_end and loader_size...
Then compile OK, and the bootloader worked and load the program into flash using siow, but the program never started...
What are the values that i have to change in ORG, loader_end and loader size to get the bootloader to work?
thanks! |
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championx
Joined: 28 Feb 2006
Posts: 151
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| Posted: Thu Sep 13, 2012 6:19 am |
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Someone? please, I really need help... I have tried everything but I can't make it work.
thanks! |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Thu Sep 13, 2012 12:53 pm |
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| Quote: | At first i got the "out of rom" message, so i just change the values on the
org and loader_end and loader_size... |
1. Post a list of the changes that you made. Post the changed lines.
Don't post the whole files, such as bootloader.h, loader.c, ex_bootloader.c.
We already have them. Just post the changes that you made.
2. Post your CCS compiler version.
3. Post if you are testing this in real hardware, or is this Proteus ? |
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championx
Joined: 28 Feb 2006
Posts: 151
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| Posted: Thu Sep 13, 2012 1:10 pm |
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Thanks for the answer PCM programmer
1-
| Code: | #if defined(__PCM__)
#include <16F876A.h>
#fuses XT,NOWDT,NOPROTECT,NOLVP
#use delay(clock=4000000) |
Just the PIC, XTal fuse and the delay definition.
2- I have tested it with the 4.057 and the 4.120, same results.
3- Im testing in real hardware. Working hardware.
If i burn the firmware (not the bootloader) directly into the pic, the program work ok. But if i load it with the bootloader (first include the bootloader.h file) then, it load the firmware but doesnt work. |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Thu Sep 13, 2012 1:18 pm |
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Are you using Ex_bootloader.c for your testing ? Is that the file you are
compiling ? |
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championx
Joined: 28 Feb 2006
Posts: 151
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| Posted: Thu Sep 13, 2012 1:19 pm |
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yes, sorry i didnt told you that.
Im using ex_bootloader.c |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Fri Sep 14, 2012 1:14 pm |
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I don't have a 16F876A, so I tested it with a 16F877A. It worked.
I used your compiler vs. 4.120, which is your version.
The only changes I made to Ex_bootloader.c and Ex_bootload.c were
to change 16F877.h to 16F877A.h (in both files). My PicStart-Plus board
has a 20 MHz crystal on it, so I left the #use delay() and HS fuse unchanged.
I compiled both programs, and then I programmed the HEX file for
Ex_bootloader.c into the 16F877A.
Then I un-plugged my ICD3 programmer from the board.
Then I carefully followed the instructions in this post:
http://www.ccsinfo.com/forum/viewtopic.php?t=40920&start=1
After TeraTerm finished sending Ex_bootload.hex to the board, then
it immediately started to display the output of that program, which
proves that it's running on the PIC:
| Quote: |
Application program version 1.00
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37
38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54
55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71
72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88
89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104
105 106 107 108 etc. |
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