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Author Topic: MPLAB & AN851 compatible 18F452 Bootloader  (Read 3893 times)
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sysypet
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« on: August 13, 2007, 11:19:58 23:19 »

I modified the original AN851 bootloader from 18F8720 to 18F452/18F4520. This is an Quick Programmer in MPLAB.
Original code written by Ross Fosler. Working perfectly! The full programming time 9600baud @4MHz 75secs, 57600baud @20MHz 35secs.
Tested 9600/19200 @4MHZ and @6MHz, 9600/19200/56000/56700 @10MHz-20MHz. All command are working!
The run/program  switch is only one button. Entering program mode: first press and hold RESET button than press and hold PROG button, next release RESET than release PROG button.  Left program mode: simply press RESET button. Thats it!
Schematic, hex and photos are included.

Best regard

sysypet
http://rapidshare.com/files/48877773/AN851.RAR
« Last Edit: August 14, 2007, 09:53:57 09:53 by sysypet » Logged
iphone
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« Reply #1 on: August 14, 2007, 05:55:53 05:55 »

thanks ... good job  Grin
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iphone
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« Reply #2 on: August 14, 2007, 06:00:14 06:00 »

BTW, how about schematic on PC site ?

sorry ... i just newbie.

thanks a lot
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sysypet
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« Reply #3 on: August 14, 2007, 09:23:47 09:23 »

The PIC and the PC are to communicate via COM  port. The communication is AUTOBAUD!
« Last Edit: August 14, 2007, 09:40:11 09:40 by sysypet » Logged
iphone
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« Reply #4 on: August 14, 2007, 11:03:16 11:03 »

Thanks very much  Smiley
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Alexandra
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« Reply #5 on: August 19, 2009, 07:28:16 19:28 »

Quote

Hi sysypet,
I am interesting in the Bootloader AN851, please can you publish again the AN851.RAR.

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