Arduino flasher 3.3v: Difference between revisions

Latest revision as of 09:05, 21 May 2024

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-== Introduction ==
+{{#externalredirect: https://www.flashrom.org/supported_hw/supported_prog/serprog/arduino_flasher_3.3v.html }}
-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
-It requires:
-* 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)
-== HOWTO ==
-* 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.