Using USBTinyISP

Try to just use avrdude so that things can be automated with Python scripts.

- Flash Bootloader

1. Put a fresh AVR chip (such as an Atmega328) into the Arduino in the correct orientation
2. Remove the jumper from the USBtinyISP
3. Plug in the USBtiny to USB
4. Plug the Arduino into DC or USB so it is powered
5. Plug the 6 pin cable from the USBtinyISP into the Arduino so that pin 1 mark is lined up with the red wire on the cable
6. Start up Arduino IDE
7. Select the chip/Arduino you are using in the Tools->Board menu
8. Do not select a COM/Serial port
9. Select Tools->Burn Bootloader->w/USBtinyISP
10. The USBtinyISP red LED should light up. It will take a minute or two to program the chip
11. When it is done, the IDE will tell you it has completed and the red LED will be off.

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The above method needs to be updated with pure avrdude so the process could be automated. Or, maybe no bootloader is needed if we are using USBTinyISP.

More tests coming...

- Flash arduino sketch

(1) Put the jumper back on the USBTinyISP, unplug power supply (USB cable) connected to Arduino.

(2) Plug the 6 pin cable from the USBtinyISP into the Arduino so that pin 1 mark is lined up with the red wire on the cable

Arduino should now be powered from USBTinyISP.

(3) avrdude -c usbtiny -p atmega328p -U flash:w:blink.hex

Probably need sudo

OR, install the udev rule. Check:

https://learn.adafruit.com/usbtinyisp/avrdude

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ref:

https://learn.sparkfun.com/tutorials/pocket-avr-programmer-hookup-guide/using-avrdude

https://learn.adafruit.com/usbtinyisp/user-manual

https://learn.adafruit.com/usbtinyisp/avrdude
https://www.arduino.cc/en/Hacking/Programmer