private void comm(Pointer<hid_device> device) {
log.debug("starting comm loop");
Pointer<Byte> data = Pointer.allocateBytes(1024);
HidapiLibrary.hid_set_nonblocking(device, 1);
while (loop && connected) {
int result = HidapiLibrary.hid_read(device, data, 1024);
if (result > 0) {
byte bytes[] = data.getBytes(result);
messageQueue.addAll(parse(result, bytes));
}
BpmMessage msg = writeQueue.poll();
if (msg != null) {
encode(msg, writeBuffer);
try {
HidapiLibrary.hid_write(device, Pointer.pointerToBytes(writeBuffer), 9);
} finally {
writeBuffer.rewind();
}
}
}
}
public void run() {
while (loop) {
Pointer<hid_device> device = connect();
if (device != null) {
connected = true;
try {
comm(device);
} catch (RuntimeException e) {
log.error("Error communicating with device", e);
} finally {
HidapiLibrary.hid_close(device);
}
}
}
}
private Pointer<hid_device> connect() {
log.debug("connecting");
Pointer<hid_device> device = null;
while (device == null && loop == true) {
device = HidapiLibrary.hid_open((short) 0x10b7, (short) 0x1234, null);
if (device == null) {
log.debug("no device found");
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
} else {
log.debug("device found");
}
}
return device;
}