USB Debugging with sigrok

• STM32F042K6
  • Datasheet
  • Reference Manual

• ST-LINK Debugger on Banggood @ $3.60
• USB TTL RS232 adaptor @ $1.63
• DreamSourceLab DSLogic Plus Logic Analyzer

• sigrok
  • PulseView
• OpenOCD
• libopencm3
• pyusb
• tmux

• Issue 779
• Pull 777
• Pull 785

• Demo Firmware

#! /usr/bin/env python3

import usb.core
import time

dev = usb.core.find(idVendor=0x0925, idProduct=0xD100)
if dev is None:
  raise ValueError('Device not found')

res = dev.ctrl_transfer(
  bmRequestType=0x40,                       # OUT, VENDOR, DEVICE request
  bRequest=1,                               # Request #1
  wValue=0xCAFE,
  wIndex=0xD00D,
  data_or_wLength=[0x01, 0x23, 0x45, 0x67])