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STM32duino GPIO Registers and programming

Sources:

http://embedded-lab.com/blog/stm32-gpio-ports-insights/
http://hertaville.com/stm32f0-gpio-tutorial-part-1.html

The libmaple libraries, on which STM32duino is based, provides access to registers by the syntax:

GPIOA->regs->REG

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Some useful YARD Stick One notes

This thing is a bit of a beast. People don't give it NEARLY the credit, or the documentation it deserves.

Two ways of using this thing: rfcat directly, or write a python script for it.

Basically, writing a python script is easier. Using rfcat directly is great but often, there are just too many silly settings to configure

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Stop all containers

$ docker stop $(docker ps -q)

Build docker image

$ cd /path/to/Dockerfile

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esphome:
  # [...]
  on_boot:
    priority: -10
    then:
      # enable clock effect after boot
      - light.turn_on: 
          id: light_ring
          brightness: 100%
          effect: Clock

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import numpy as np
import matplotlib.pyplot as plt
import matplotlib.animation as animation
import serial

fig, ax = plt.subplots()
line, = ax.plot(np.random.rand(10))
ax.set_ylim(-5000, 5000)
xdata, ydata = [0]*100, [0]*100
raw = serial.Serial("/dev/ttyUSB1",9600)

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Gnuk Token on ST Dongle with STM32F103CBU6

Based on Daniel Kucera's implementation of the confirmation button, adapted for a different ST Dongle using an STM32F103CBU6 microcontroller.

Order of the 4 SWD interface holes from left to right:

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It's not immediately obvious how to pull down the code for a PR and test it locally. But it's pretty easy. (This assumes you have a remote for the main repo named upstream.)

Getting the PR code

1. Make note of the PR number. For example, Rod's latest is PR #37: Psiphon-Labs/psiphon-tunnel-core#37

2. Fetch the PR's pseudo-branch (or bookmark or rev pointer whatever the word is), and give it a local branch name. Here we'll name it pr37:

$ git fetch upstream pull/37/head:pr37

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#!/usr/bin/env python3
# -*- coding: utf-8 -*-

try:
    import tkinter as tk
except ImportError:
    import Tkinter as tk

class VerticalScrolledFrame:
    """

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class Foo(object):

    def __getattribute__(self, name):
        print "getting attribute %s" % name
        return object.__getattribute__(self, name)

    def __setattr__(self, name, val):
        print "setting attribute %s to %r" % (name, val)
        return object.__setattr__(self, name, val)

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# see also: /lib/udev/hwdb.d/60-keyboard.hwdb
evdev:atkbd:dmi:bvn*:bvr*:bd*:svnHewlett-Packard*:pn*EliteBook*:pvr*
 KEYBOARD_KEY_81=f20                          # Fn+F8 on Elitebook, map to F20
# KEYBOARD_KEY_81=fn_esc                      # org entry