Bootloader again

[runeso]

Hi all

I have made the CCS included bootloader to work (ex-bootloader.c, bootloader.h and loader.c) on my 18F458

But I can't compile a code with both my bootloader and a source code included.

What I want to do is to create a new version of my source code with the bootloader included so that I can program this with mplab. And then when a new release is done, this code is whitout the bootloader which can then be DL'ed with RS-232. (The download of the source code works fine now.)

Has anyone done this before.

How do I set up the #org, #build reset and so on, in the ex_bootloader.c file to make this work.

Best regards Rune

[Guest]

I also use loader.c in my project.

main.c

#fuses HS,NOWDT,PUT, NOPROTECT, NOLVP, BROWNOUT

#include "loader.c" //it is pretty much the same as the example, except #define LOADER_SIZE 0x4FF

main()
{
....
CommandDispatcher();
....
}

CommandDispatcher()
{
...
/*Ready to run the loader.c*/
disable_interrupts(global);
putchar(XON);
LED_RED();
load_program(); //this will not return
}

Everything seems to work fine, so far.

The only concern is:

If the loader can't finish due to any reason (such as power lost), the micro has to be sent back to me -- thus I am not telling my customers about this feature, and only use it when it is absolutely necessary.

[asmallri2]

[treitmey]

asmallri2,
Can you share this code?
I looked into this for a while, and I also had loader problem.
I ended up going in a different direction,... But I would love to find out what went wrong with my code.

Thanks for your help.
tjr

[asmallri]

[Guest]

[asmallri]

Is it similar to what described in this app note?

http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1824&appnote=en012031[/quote]

No but it follows the general principle of a bootloader. My loader is located high in memory and the only low memory consumed is the reset vector. My initial implementation was a bootloader that works over ethernet (appearded in issue #165 of Circuit Cellar in May this year). It works but reading a line of the hex file and sending the entire line wrapped in a header to the target. The target returns status, line by line to the coontrolling host. I then ported it to RS232. I also have a flavour that I use for bootloadinng thru an intermediary PIC and every bootloads a MAX1463 digital ananlog processor thru the downstream remote pic over the SPI bus. This bootloader's hex file is included in issue #171 (October 2004).

[bloodynri]

I have a problem with loader.c

First of all I'm confused about what is required to run a bootloader.
In my project, I have my main C file, the header files related to that and the loader.c file. Is this all I need? Do I need the ex_bootloader etc that come with CCSC?

When I compile the Main C file, I get an error for loader.c that says "unidentified identifier getch" and the same for putchar. Can someone please help me with these issues?
Thanks alot!

[Nick]

[Guest]