Arduino flasher 3.3v
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This explains how to:
- Easily lower the voltage of an arduino
- Use that arduino to flash a coreboot image on a GM45 Thinkpad with a SOIC16 chip
- An AVR Arduino at 5v
- An USB<->Serial adapter capable of providing enough current to power up:
- The arduino
- The flash chip
- The circuits around the flash chip
It was tested with:
- An Arduino.org "nano version 3.3"
- A Sparkfun "FTDI Basic 3v3" (Uses an FTDI FT232R)
- Flash the Arduino with frser-duino and lower the serial port speed to 115200
# make u2 # BLBAUD=57600 SERIAL_DEV=/dev/ttyUSB0 make program
- Connect the FTDI adapter to RX and TX of the arduino
- Connect the 3V3 of the FTDI adapter to the 5V pin of the Arduino
- Connect the GND of the FTDI adapter to the GDN of the arduino.
- Get an USB cable and don't connect it to the computer
- Connect it to the FTDI adapter
- Connect the clip (Like a SOIC-8 or SOIC16 Pomona clip) to the arduino
- Connect the USB cable to the computer.