Read a Byte with ADK

adk_serial_led_test.c

#include <Max3421e.h>
#include <Usb.h>
#include <Max3421e_constants.h>

#include <AndroidAccessory.h>

AndroidAccessory acc("Google",
                     "Light Runner",
                     "LED Controller.",
                     "1.0",
                     "http://google.com",
                     "0000000000000001");



#define  LED3_RED       2
#define  LED3_GREEN     4
#define  LED3_BLUE      3

#define  LED2_RED       5
#define  LED2_GREEN     7
#define  LED2_BLUE      6

#define  LED1_RED       8
#define  LED1_GREEN     10
#define  LED1_BLUE      9

void init_leds()
{
	digitalWrite(LED1_RED, 1);
	digitalWrite(LED1_GREEN, 1);
	digitalWrite(LED1_BLUE, 1);

	pinMode(LED1_RED, OUTPUT);
	pinMode(LED1_GREEN, OUTPUT);
	pinMode(LED1_BLUE, OUTPUT);

	digitalWrite(LED2_RED, 1);
	digitalWrite(LED2_GREEN, 1);
	digitalWrite(LED2_BLUE, 1);

	pinMode(LED2_RED, OUTPUT);
	pinMode(LED2_GREEN, OUTPUT);
	pinMode(LED2_BLUE, OUTPUT);

	digitalWrite(LED3_RED, 1);
	digitalWrite(LED3_GREEN, 1);
	digitalWrite(LED3_BLUE, 1);

	pinMode(LED3_RED, OUTPUT);
	pinMode(LED3_GREEN, OUTPUT);
	pinMode(LED3_BLUE, OUTPUT);
}

void setup() {
  init_leds();
  Serial.begin(115200);
  acc.powerOn();
}

#define NONE 0x0
#define RIGHT 0x1
#define LEFT 0x2

void loop()
{
  if (acc.isConnected()) {
    byte msg[1];
    int len = acc.read(msg, sizeof(msg), 1);
    if (len > 0) {
      byte b = msg[0];
      if (b == NONE) {
        analogWrite(LED1_RED, 0);
        analogWrite(LED2_RED, 0);
        analogWrite(LED3_RED, 0);
      } else if (b == RIGHT) {
        analogWrite(LED1_RED, 255);
        analogWrite(LED2_RED, 255);
        analogWrite(LED3_RED, 0);
      } else if (b == LEFT) {
        analogWrite(LED3_RED, 255);
        analogWrite(LED2_RED, 255);
        analogWrite(LED1_RED, 0);
      } else {
        analogWrite(LED2_GREEN, 0);
      }
    }
    analogWrite(LED2_GREEN, 0);
  } else {
    analogWrite(LED2_RED, 0);
    analogWrite(LED2_GREEN, 255);
    analogWrite(LED1_RED, 255);
    analogWrite(LED3_RED, 255);
  }
}