Blinky Grid wired programmer sketch

blinky_grid_programmer.ino

// Data and clock lines for the BlinkyGrid

#define BG_CLOCK 2
#define BG_DATA  8
// How long to take for each half cycle
#define CL_DELAY 50

// Keep track of the current state of the clock
bool c = false;

// Keep track of the position in the data
int i = 0;

// The data (from xmit_raw on http://www.wayneandlayne.com/blinky_programmer/?debug)
bool data[] = {0,0,0,0,0,1,0,0, // 04
               0,0,0,0,0,0,0,0, // 00
               0,0,0,0,0,0,0,0, // 00
               0,0,0,0,0,1,1,0, // 06
               0,0,0,0,0,0,0,1, // 01
               0,0,0,1,1,1,0,1, // 1D
               0,0,0,0,0,0,0,1, // 01
               0,0,0,1,1,1,0,1, // 1D
               1,0,1,1,1,0,1,0, // BA
               0,0,0,0,0,0,0,0, // 00
               0,0,0,0,0,0,0,0, // 00
               0,0,0,0,0,0,0,0, // 00
               0,0,0,0,0,0,0,1, // 01
               1,1,1,1,1,1,1,1  // FF
               };

void send_bit() {
  // Set the data line to the desired state
  digitalWrite(BG_DATA, data[i]);
  Serial.print(data[i]);
  
  i = i + 1;
}

void cl() {
  // invert the clock state
  c = !c;
  digitalWrite(BG_CLOCK, c);
  // For debugging
  digitalWrite(13, c);
}

void setup() {
  // Pins to output
  pinMode(BG_CLOCK, OUTPUT);
  pinMode(BG_DATA, OUTPUT);
  pinMode(13, OUTPUT);
  
  // Set both pins low ("black" level)
  digitalWrite(BG_CLOCK, LOW);
  digitalWrite(BG_DATA, LOW);
  digitalWrite(13, LOW);
  
  Serial.begin(9600);
  Serial.println("Black level set. 5s to programming.");
  delay(5000);
  Serial.println("Programming!");
}

void loop() {
  // Loop until the end of the data
  while (i < (sizeof(data))) {
    // Write a bit
    send_bit();
    delay(CL_DELAY / 2);

    // Transit the clock
    cl();
    delay(CL_DELAY / 2);
  }
  
  Serial.print("\nDone programming ");
  Serial.print(i);
  Serial.print(" bits (");
  Serial.print(i / 8);
  Serial.print(" bytes).\n");

  digitalWrite(BG_CLOCK, 0);
  digitalWrite(BG_DATA, 0);
  while (1) {
    delay(1000);
  }
  //i = 0;
}