//  ** This file was downloaded from:
//  ** http://www.afox-consulting.com//product/DigiTalkerInterfaceBoard.html
//  ** File:    DigiTalker.ino
//  ** Author:  A Fox Consulting & Design
//  ** Date:    05/12/2014
//
//  ** DISCLAIMER: This source code was written to interface with a
//  ** specific in-house prototype product developed by A Fox Consulting
//  ** And Design. The code here is experimental and is meant to provide
//  ** proof-of-concept of the device only and is not intended for
//  ** commercial use.
// 
// This is a sample source code file to demonstrate
// our DigiTalker I2C Interface Board.
//
// Wiring set-up:
//   Digital 5     --> To DigiTalker ~INTR (pin 6)
//   Digital 6     --> To DigiTalker CS (pin 3)
//   Digital 7     --> To DigiTalker ~WR (pin 4)

#include "Wire.h"

#define pDIGI_INTR 5
#define pDIGI_CS   6
#define pDIGI_WR   7

#define MCP_ADDR  0x20               // The MCP230008 can have an address from 0x20 - 0x27
#define WordDataL 56

// Some silly sentences to send to DigiTalker
word WordData[56] = {
  
     0,   71,   65,   2,   121,    2,   80,  129,
     5,   71,   81,   70,   81,   70,   76,   76,
    76,   66,   66, 0x46, 0x46, 0x46, 0x46, 0x46,
  0x53, 0x4B, 0x60, 0x75, 0x03, 0x1D, 0x52, 0x47,
  0x47, 0x07, 0x09, 0x7A, 0x04, 0x4D, 0x81, 0x47,
  0x47, 0x78, 0x49, 0x8E, 0x43, 0x6A, 0x20, 0x01,
  0x47, 0x41, 0x45, 0x41, 0x45, 0x42, 0x47, 0x42
};

void SayWord (byte value) {
  Wire.beginTransmission(MCP_ADDR);
  Wire.write(0x09);                  // Start writing at register GPIO
  Wire.write(value);                 // Write "value" to GPIO port
  Wire.endTransmission();
  // Do the write
  digitalWrite(pDIGI_CS, 0);
  digitalWrite(pDIGI_WR, 0);
  delayMicroseconds(2000);
  digitalWrite(pDIGI_WR, 1);
  digitalWrite(pDIGI_CS, 1);
  while(!digitalRead(pDIGI_INTR)) {};
}

// --------------------------------------------------------------------------------

void setup() {
  pinMode(pDIGI_INTR, INPUT);
  pinMode(pDIGI_WR, OUTPUT);
  pinMode(pDIGI_CS, OUTPUT);
  digitalWrite(pDIGI_WR, 1);         // Set DigiTalker ~WR HIGH
  digitalWrite(pDIGI_CS, 1);         // Set DigiTalker Chip Select HIGH
  delay(1000);
  
  Wire.begin();
  Wire.beginTransmission(MCP_ADDR);  // Available addresses are 0x20 - 0x27
  Wire.write((byte)0x00);            // Start at IODIR register
  Wire.write((byte)0x00);            // Set all of GPIO port to OUTPUT
  Wire.endTransmission();
}

// --------------------------------------------------------------------------------
//          High-Level code begins here
// --------------------------------------------------------------------------------

void loop() {
  byte i = 0;
  
  for(i=0;i<150;i++) {
    //SayWord(WordData[i]);
    SayWord(i);
    delay(1000);
  }
  
  delay(5000);
}