druid

a basic repl for crow with some utilities

setup

• requires python 3.5+
  • windows & osx: https://www.python.org/downloads/
  • linux: sudo apt-get install python3 python3-pip
• requires pyserial, asyncio, and prompt_toolkit. install with:

pip3 install pyserial asyncio prompt_toolkit

linux additional setup

without

druid

python3 druid.py

• type q (enter) to quit.

• type h (enter) for a list of special commands.

• input values are printed on the top line

• will reconnect to crow after a disconnect / restart

• scrollable console history

example:

t@nav: ~/druid $ python3 druid.py
//// druid. q to quit. h for help

> x=6

> print(x)
6

> output[1].volts = 0

> q

execute a lua script and enter the REPL from the command line:

python3 druid.py examples/test-2.lua

upload

python3 upload.py examples/test-2.lua

uploads the provided lua file to crow & stores it in flash to be executed on boot.

download

python3 download.py

prints to screen. copy to file by:

python3 download.py > feathers.lua

examples

druid comes with a bunch of example scripts to help introduce crow's syntax, and spur your imagination with some zany ideas. Here's the list with a brief description of each (most scripts have a longer description including the assignment of ins and outs at the top of the script):

• boids.lua: four simulated birds that fly around your input
• booleanlogic.lua: logic gates determined by two input gates
• clockdiv.lua: four configurable clock divisions of the input clock
• cvdelay.lua: a control voltage delay with four taps & looping option
• gingerbread.lua: clocked chaos generators
• samplehold.lua: sample and hold with quantization & randomness
• seqswitch.lua: route an input to 1 of 4 outputs with optional 'hold'
• shiftregister.lua: output the last 4 captured voltages & play just friends
• stop.lua: reset crow