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meereck
Joined: 09 Nov 2006
Posts: 173
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| PIC 18F2455 and usb bootloader |
 Posted: Tue Nov 28, 2006 4:06 am |
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Hello,
I was told it is possible to use 18F4550 USB bootloader also in 18F2455.
But if I want to use it I have to remap interrupt vectors.
Is is possible and how to do it with CCS compiler?
thanks in advance
M. |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Tue Nov 28, 2006 11:43 am |
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| Quote: | But if I want to use it I have to remap interrupt vectors.
Is is possible and how to do it with CCS compiler? |
Yes, you can do this.
Look at the #build directive in the the CCS manual.
Download the manual from this page:
http://www.ccsinfo.com/downloads.php
Also search this forum for many threads on this topic.
Use these keywords: #build bootloader
Set the search engine to "search for all terms".
http://www.ccsinfo.com/forum/search.php
Also search for your keywords: interrupt vectors
It's all in the archives. |
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meereck
Joined: 09 Nov 2006
Posts: 173
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| Posted: Thu Nov 30, 2006 8:31 am |
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thank you very much for reply.
I will go through it.
BR M. |
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meereck
Joined: 09 Nov 2006
Posts: 173
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| Problem |
| Posted: Mon Dec 04, 2006 8:09 am |
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EDIT :
After few minutes of investigating i found some mistakes:
1) build directive was pointed to wrong reset address
#build(reset=LOADER_END+1, interrupt=LOADER_END+9)
2) Bootloader had protected memory writing in configurating bits.
It seems be working now.
------------------------------------------------------------------------------------
I have successfully flashed the 18F4550 bootloader to 2455. Now I want to download my own code (below) over the PDFSUSB.exe , device seems to be connected. When I load the hex file into the program I obtain warning that fuses are not the same - I think it is.
If I try to download the hex file, it tells me:
WARNING - Failed to program CONFIG DATA
MESSAGE - Programming CONFIG DATA...
WARNING - Failed to program FLASH
MESSAGE - Erasing and Programming FLASH...
I use version 3.242
Thank you, BR M.
| Code: | #include <18f2455.h>
#include "main.h"
#device ADC=10
#fuses HSPLL,NOWDT,NOPROTECT,NOLVP,NODEBUG,USBDIV,PLL1,CPUDIV1,VREGEN,NOPBADEN,WRTB,MCLR,NOCPD
#use delay(clock=48000000)
#use rs232(baud=9600,xmit=PIN_C6, rcv=PIN_C7, PARITY=N, BITS=8, STREAM=RS232)
#define LOADER_END 0x7FF
#define LOADER_SIZE 0x6FF
#build(reset=LOADER_END+2, interrupt=LOADER_END+9)
#org 0, LOADER_END {}
char textbuffer[29];
void main()
{
unsigned long value;
int a;
setup_adc_ports(AN0);
setup_adc(ADC_CLOCK_INTERNAL); |
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Jacques95
Guest
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| PIC 18F2455 and usb bootloader |
| Posted: Thu Aug 16, 2007 1:46 am |
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I got the same problem and I can not solved It....
Did you solved this problem?
Jacques |
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