PIC16F877A Bootloader Programming

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kmdineshece

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Hi all!........

I want to develop a PIC development board with programming options!.....

how can do it?......

is it possible by boot-loader concept?...where can i download?
how it will work?
 

hi,

i think this works for you. it is a small but very effective solution. most of the jobs are done by computer and memory saved from pic's memory. i used it for 18f series pics but it can be used all types. first make a few minor changes to bootloader program bootloader.c such as pic type, connection pins and baudrate, then compile and upload your pic.

after upload it can program itself via rs232. then you just add the following lines to source code of your program which you are intended to upload pic via your bootloader. and run the pc program adjust the port and baud rate, pick the source code and click download. ta daa it happened.

Code: 
...
/* ------------------------------------------------------------------------- */
/* map reset vector and interrupt vector                                     */
/* 0x000-0x3FF is used by the bootloader. The bootloader maps the original   */
/* reset vector (0x000) to 0x400 and the interrupt vector (0x008) to 0x408.  */
/* ------------------------------------------------------------------------- */
#build (reset=0x400, interrupt=0x408)
/* ------------------------------------------------------------------------- */
/* reserve boot block area                                                   */
/* This memory range is used by the bootloader, so the application must not  */
/* use this area.                                                            */
/* ------------------------------------------------------------------------- */
#org 0, 0x3FF {}

for more information:

http://www.picprojects.net/serialbootloader/
 

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