On Sat, 14 Dec 2013 02:46:57 -0600 Eric Marks <[email protected]> wrote:
> I successfully used a Arduino Uno as a serprog programmer to program a > SST25VF016B with > Flashrom 0.9.5.2-r1517 on Ubuntu. > > I had tried hooking the eeprom up to the Arduino via level shifting > via resistors, and then via level shifting mosfets + resistors, and finally > via a level conversion chip, but none of them worked reliably. I finally > converted my Ardruino Uno to 3.3v by replacing the regulator. > > http://learn.adafruit.com/arduino-tips-tricks-and-techniques/3-3v-conversion > > This was a much easier solution, and it worked reliably. Once converted to > 3.3v, no extra components are needed. Just wire the eeprom directly to > pins 10,11,12,13, GND, and 5V (which is now actually 3.3v). Remember, > three pins of the eeprom go to 3.3v. > > I still had to slow the UART speed down to 115200 for the Arduino sketch on > the Uno, and while reading took a normal amount of time, it took several > hours to program the chip. I used -VVV to enable very very verbose output > to monitor the progress. > > Could someone update the wiki with this information? It didn't look like > there was any place to sign up and edit it myself. > > http://www.flashrom.org/Serprog/Arduino_flasher > > Thanks for helping me save a server! Thanks for your report and sorry for the late reply. I have created a wiki account for you in case you still want to contribute. The Arduino page requires quite some clean up IIRC. The original author really likes to be verbose... ;) The level shifting is indeed a delicate issue sometimes. Some chips react way worse to imperfect signals than others. -- Kind regards/Mit freundlichen Grüßen, Stefan Tauner _______________________________________________ flashrom mailing list [email protected] http://www.flashrom.org/mailman/listinfo/flashrom
