jint Java_com_hardkernel_wiringpi_MainActivity_analogRead(JNIEnv* env, jobject obj, jint port) {
    return analogRead(port);
}

void Java_com_hardkernel_wiringpi_MainActivity_digitalWrite(JNIEnv* env, jobject obj, jint port, jint onoff) {
    digitalWrite(port, onoff);
}

int Java_com_hardkernel_wiringpi_MainActivity_wiringPiSetupSys(JNIEnv* env, jobject obj) {
    wiringPiSetupSys();
    return 0;
}