Th3maz1ng/TOSR-04
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Th3maz1ng 2021-07-22 09:09:38 +02:00
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@ -32,7 +32,7 @@ Indeed, this relay board was meant to be controled by sending very poorly design
## What I am planning to do :
1. Reverse engineer the schematic of this board (because it is not available) (DONE !)
- The schematic is now available as a pdf file in the **schematic** folder
- The [schematic](/git/Th3maz1ng/TOSR-04/src/branch/master/schematic/TOSR-04.pdf) is now available as a pdf file in the **schematic** folder
2. Find the best way to flash a custom firmware on the ATMEGA328PU (DONE !)
- Check the section : **The best way to flash a firmware** section hereunder
3. Write a custom firmware for it (TO DO)
@ -43,8 +43,8 @@ Indeed after looking at the reverse engineered schematic, the SPI pins needed fo
Fortunately enough, the onboard FTDI seems to be connected with the DTR line which is connected through a capacitor to the ATMEGA's reset pin that is required by the Arduino bootloader.<br />
I will test it this weekend and keep you informed.
## But how to repurpose the removed ATMEGA328PU ?
I will try to restore the chip to a factory state by programming it with a HVPP (High Voltage Parallel Programmer) in order to reset the fuse bytes as well if they are set of course ...<br />
## Could the onboard ATMEGA be saved ?
I will try to restore the chip to it's factory state by programming it with a HVPP (High Voltage Parallel Programmer) in order to reset the fuse bytes as well if they are set of course ...<br />
If I succeed, I'll explain how I did it here.
## FAQ