How can I use the bootloader in PCM example folder ??

[arunb]

Hi,

Compiler : PCM 3.228
Target: 16F648A, 16F877A

I would like to use the bootloader given in the PICC folder, I have also managed to modify it for a 16F877A mcu, but I find that when I load a program into the mcu, the bootloader gets erased, as a result I have to burn the bootloader using a programmer..

Is this how a bootloader works ?? kindly explain how I can prevent the bootloader from getting erased ...

Unfortuantely I have lost the source code for the above problem, so I may have to work out the program again ....

thanks
arunb

[Ttelmah]

The 'keys', are the definitions in bootloader.h. You include this file, with the running program, as well as with the bootloader itself, but in the bootloader program, define the keyword _bootloader, before loading it. In the main program, you load it without this definiton. It then adds these definitions to your 'bootloaded' program:

#define LOADER_END 0x1FF
#define LOADER_SIZE 0x1BF

#build(reset=LOADER_END+1, interrupt=LOADER_END+5)

#org 0, LOADER_END {}

Now, the last two lines of this, move the bootloaded program up, to avoid the bootloader.

Best Wishes