Arduino code for controlling GLCD through Serial port

gistfile1.cpp

/**
    Copyright: (c) SAEKI Yoshiyasu
    License   : MIT-style license
                <http://www.opensource.org/licenses/mit-license.php>
    last updated: 2010/12/24
**/

#include <ks0108.h>

int inByte = 0;
unsigned int sx;  // 0 ~ 128
unsigned int sy;  // 0 ~ 64
unsigned int dx;
unsigned int dy;
char pairs[17];  // sx,sy:dx,dy;

void setup(){
  Serial.begin(9600);
  GLCD.Init(NON_INVERTED);
}

void loop(){
  if(Serial.available() > 0) {
    int i = 0;
    do {
      inByte = Serial.read();
      pairs[i++] = (char)inByte;
      if(inByte == ';') {
        break;
      } else if(inByte == 'c') {
        GLCD.ClearScreen();
        break;
      } else if(inByte == '.') {
        Serial.println(".");
        break;
      }
    } while((inByte >= '0' && inByte <= '9') ||
            inByte == ':' || inByte == ',');
    pairs[--i] = '\0';
    Serial.println(pairs);
    if(sscanf(pairs, "%d,%d:%d,%d", &sx, &sy, &dx, &dy) == 4) {
      GLCD.DrawLine(sx, sy, dx, dy, BLACK);
    }
  }
}