There is a 4 pin header for power (left side) and a four pin header for ground (right side). Two 14 pin female headers are soldered to the base for connectivity to any pin.
#Flashing arduino using spi programmer serial
You can see the 6 pin ICSP header on the side (to attach the FTDI USB to serial convertor). It is a bit different than other Arduinos I made in the past and wrote about HERE. Here is a picture of my newest DIY Arduino. Here is an example of how an 8-pin Winbond BIOS chip is wired to the Arduino (download the Fritzing source HERE): A DIY version of an Arduino UNO can be easily made on a breadboard, PCB or perfboard. The DIY Arduino can be run at 3.3V using an FTDI USB to Serial converter. You could use level translation circuitry to reduce the voltage but it turns out there is a much simpler way. One of the ‘problems’ in flashing BIOS chips is that they are usually 3.3V whereas the Arduino is usually 5V.
Once the code is loaded via avrdude into the Arduino, you are ready to use it with Flashrom.
However, once programmed, the larger BAUD/buffer rate of 2000000 can be used to flash with. Since I am using an external FTDI chip, it needs to specify 115200 BAUD to program the Arduino. Notice that the documented commands are not what I used as they are for a ‘real’ Arduino UNO.
#Flashing arduino using spi programmer install
Here are the commands I used to install the prerequisites and the frser-duino code into my Arduino (a DIY UNO).Īvrdude - c arduino - p m328p - P / dev/ ttyUSB0 - b 115200 - U flash : w : frser- duino. I am using Fedora (24 as of the date of this post). You can get the source code for frser-duino HERE. Serprog uses the FTDI chip, the serial port and SPI interfaces to do its work. More information about Flashrom using the Serprog ‘programmer’ can be found HERE.
I am using frser-duino which Flashrom sees as a ‘serprog’ programmer. The Arduino (or Atmega 328P) can very easily and economically be made into a Flashrom programmer.īasically a program is loaded into the Arduino to let Flashrom program through it. All Flashrom needs is a programmer to interface with. However, I just found out how easy it is to use Flashrom and an Arduino at 3.3V to program (read, write and erase) various ‘flash’ chips. I’ve written about Flashrom and the BusPirate in a previous post HERE. Flashrom is an amazing piece of software and a life-saver when you need it! If you’ve tried to update your BIOS before using manufacturer supplied software and something went wrong, then you know how valuable Flashrom can be.
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