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efm8load's Introduction

efm8load.py

A python-only implementation of the efm8 bootloader protocol

see http://fishpepper.de/2016/10/15/efm8-bootloader-flash-tool-efm8load-py/ for more info

Status:

  • tested on EFM8BB10F8G: identify, write, verify and read are working

Usage:

  • connect rs232 (3.3V level!) to the RX and TX pins of your MCU
  • empty targets boot right into the bootloader (flash[0] = 0xFF -> bootloader)
  • flashed targets need the C2D pin pulled low during powerup to enter bootloader mode

TODO: add a protection to stop users from overwriting the bootloader area

efm8load's People

Contributors

clacktronics avatar cyanview avatar fishpepper avatar kammutierspule avatar

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Forkers

therealprof mschuldt clacktronics jaguarondi conative-labs kammutierspule tuuzdu ilgrim artisdom occoder josuah anbbc martonmiklos jk128 y3ll0w

efm8load's Issues

ERROR: serial read timed out

I get this error ERROR: serial read timed out while trying to run the script in it's simplest form: python3 efm8load.py -i
It seems that the TX led of the FTDI lights up, but the RX gets nothing, as if the mcu is not there. Tried on EFM8BB10F8G and on a brand new EFM8BB21F16G (both QFN20). On both boards I soldered C2D to GND using a wire.

I even tried the following:

  1. Added "sudo" in front
  2. Shortened the wires
  3. Connected the FTDI directly to a USB port on PC (no hub)

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