Carprog Mcu Reflash Step by step

[audiotek]

Here is how to reflash CARPROG Mcu AT91SAM7S256 step by step, first of all I wish to thanks to lupu_sandu, elchip, autocargo, Tachonow, carradio2001 and all DK forum members who made this possible.
I bought my Carprog clone 4.01 from digi_obd but after about 50 uses starts a counter: "260 uses left - update hardware to synchronize" and was decreasing, anyway 260 uses is big number to recover the investment (us $209 dlls), the programmer was paid before the counter starts.

Ok, first we need this stuff:

1.- AT91SAM7S256 bin:
http://www.digital-kaos.co.uk/forums...og-rev-0.3.rar
2.- Jtag programmer:

3.- Jtag software:
http://www.digital-kaos.co.uk/forums....1-release.rar

We need to prepare the Carprog to connect to Jtag programmer but first the flash need to be erased, the Jtag function in mcu is dissabled, you can't connect to the mcu before erase the flash. Remove the AT88SC eeprom from the board, please note where is the pin 1 in eeprom before remove:



Carefully lift the pin 55 (reset) of the mcu and solder a wire and secure it with a small ammount of silicone (you don't want to broke the pin in the process).
Connect the Carprog (with the pin 55 dissconected) to the 12v supply, wait about 10 seconds and connect the wire from pin 55 to Vcc (3.3V) in Carprog:





Wait from 5 to 10 seconds after connect the 12v supply, the flash content will be erased and the Jtag option of the Mcu will be enabled now. If not work leave connected for about 3 to 5 minutes. Disconnect the 12v supply from carprog and remove the pin 55 wire from vcc. The pin 55 must remain disconnected until the programming process is done.

Install the H-JTAG software in your pc.