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Assembly notes
- All passive are 0603
- Most values can be approximated ( I tried not to change them too much on he CEC part though, not really knowing what whas going on there)
- R5 must not be placed (well, at least, it didn't work when I tried)
- I2C pullups (R11/R12) should not be placed (I didn't ttry this yet...)
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Programming notes
- DFU upgrade
- Solder the jumper on the board
- Plug the USB port in your computer
- Reset the board by shorting the 2nd (GND) and 3rd (/RST) pads on the ICSP header
- I use "dfu-programmer" from the Debian repository
- Sometimes, an "erase" command is required before the "flash" command
- ICSP upgrade:
- Pinout for the ICSP header is the following:
- Vcc
- If the USB port is not connected, you can put 3.3v or 5v here, the Atmega32u2 supports both.
- If the USB port is connected, it is better to leave this unconnected
- Gnd
- /RST
- SCLK
- MOSI
- MISO
- I use a DIY UsbtinyISP clone and never had any issue with it.
- Be aware that you might end up erasing the DFU bootloader on the chip. Good luck finding a replacement ^^
RedoX
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this little do-dad is pretty cool, would love to see an IR LED on this so we can intercept cec commands and do cool stuff over ir
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