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#include <digitalWriteFast.h>

// din sync to midi

// pins
#define DINSYNC_STARTSTOP 3
#define DINSYNC_CLOCK 2
// midi pin 5 > 220ohm resistor > D1
// midi pin 2 > ground
// midi pin 4 > 220ohm resistor > +5V

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/*

  MCP4922 DAC test with spi4teensy3 fast SPI library, Teensy 3.0
 
  mostly pinched from http://forum.pjrc.com/threads/24082-Teensy-3-mcp4921-SPI-Dac-anybody-tried
 
  will need the spi4teensy3 library (https://github.com/xxxajk/spi4teensy3) copying into the libraries folder
 
  at SPI_CLOCK_DIV2 (24MHz on standard Teensy 3.0)
    generates ramp wave with period of 13.8ms (72hz)

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/*

  MCP4922 DAC test with standard SPI library, Teensy 3.0
 
  mostly pinched from http://forum.pjrc.com/threads/24082-Teensy-3-mcp4921-SPI-Dac-anybody-tried
  
  if we delete the delay(5) in the loop 
  at SPI_CLOCK_DIV2 (24MHz on standard Teensy 3.0)
    generates 50hz ramp wave
    clock period ~42ns

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/* DualFrequencyCounter */

// is a bit sketchy, but seems accurate enough.

// Relies on 
// - Adafruit's SPI_VFD library
// - one of those fancy Samsung 20x2 VFDs
// - and the usual digitalWriteFast lib which I know you've already got.

// checked with a DSO Nano oscilloscope, not that they're all that great

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import Console._
import scala.util.Random

val colours = Seq(BLUE, CYAN, GREEN, MAGENTA, RED, YELLOW)

def rainbow(text: String, colours: Seq[String]) = text.zipWithIndex.map{ case (c,i) => colours(i%colours.size)+c }.mkString + RESET

for (a <- 1 to 20) println(rainbow("Yeah cool colours", Random.shuffle(colours.toList)))

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/*
  MCP4922 test
  Steve Woodward, 2010
  most code borrowed from
  http://mrbook.org/blog/2008/11/22/controlling-a-gakken-sx-150-synth-with-arduino/

    connections
====================================================

+5v           > 4922 pin 1

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/*
  MCP4922 test
  outputs steadily rising voltages through both DACs
  
  Steve Woodward, 2010
  most code borrowed from
  http://mrbook.org/blog/2008/11/22/controlling-a-gakken-sx-150-synth-with-arduino/
  
  connections
  ====================================================

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/*******************************************************/
/* Dead simple voltage controlled clock
/* adjustable pulse width    
/* 
/* intended for use as a master clock for a sequencer
/* designed for Arduino Duemilanove (Atmega 168)
/* you might need to change the port numbers for 
/* Arduino Mega/other Arduinos
/*                                        
/* Steve Woodward, Mar 2012