mattvenn

With a passion for Brown forged in the rolling valleys of West Yorkshire,
the synthesist aims, through a traditional practice formed over generations, 
passed down like corrugations in the material that forms the product of the  practice.

Recent site specific inter-dependant works include public performance  based 
chemistry, and through research-led desire highlights technologies for the post-processed
pulp-upcycling within compact markets. 

Engagements related with and entwined, duly perform a significant leaning of character.
Based not only in a non-self-referential framework of time, importantly a pseudo-inauthentic

mattvenn

from turtle import *
import turtle
speed(0)

ninja = turtle.Turtle()

ninja.speed(0)

for i in range(180):
    ninja.forward(100)

mattvenn

from turtle import *
import turtle
speed(0)

ninja = turtle.Turtle()

ninja.speed(0)

for i in range(180):
    ninja.forward(100)

mattvenn

from turtle import *
import turtle
speed(0)

ninja = turtle.Turtle()

ninja.speed(0)

for i in range(180):
    ninja.forward(100)

mattvenn

from turtle import *
color('purple', 'black')
begin_fill()
while True:
    forward(200)
    left(170)
    if abs(pos()) < 1:
        break
end_fill()
penup ()

mattvenn

from turtle import*
turn = 0 

speed (1000) 
while turn <72: 
    pencolor ("Pink")
    pensize(10)
    forward(100)
    back(100)
    right(270)

mattvenn

Ken wrote up the process on windows here

Here's how on Linux (works for Ubuntu 14).

Unplug blue jumper on pin7&8.

Plug USB cable into socket closest to ARM chip.

Use lsusb to find the device:

mattvenn

samp = [1 ,1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 1, 1, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1]
state = 1 
db0 = 0 
db1 = 0 
print("samp     = button state               0 is pressed")
print("delta    = samp ^ state               difference between sample and state")
print("db0      = ~(db0) & delta             first bit of 2 bit counter")
print("db1      = (db1 ^ db0) & delta        second bit of 2 bit counter")
print("changes  = ~(~delta | db0 | db1)      if a change has happened")
print("state    = state ^ changes            state of the debouncer")

mattvenn

gdb + avarice + debugwire on attiny88

enable debugwire

enable with avrdude (fuse for attiny88):

avrdude -c dragon_isp -P usb -p attiny88 -v -U hfuse:w:0xd9:m

compilation

mattvenn

import serial
import re
"""
i2c data captured with sigrok-cli:

sigrok-cli  -C 0,1 -c "samplerate=500k:voltage_threshold=1.8-1.8:continuous=on" --driver=dreamsourcelab-dslogic --samples 10M  -P i2c:sda=1:scl=0 -A i2c=address-write    --protocol-decoder-samplenum > data.raw

"""
samplerate = 1.0/500e3