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Ich benutze Android-Dinge mit einem VSIONIS-Tastatur im Leser-Modus, der auf D0 und D1 Pins in Wiegnad 26-Format ausgibt. Ich habe ein paar Bibliotheken gefunden, wie man das auf Arduino macht und den Code portiert hat, aber es scheint nicht zu funktionieren. Ich benutze einen Raspberry Pi 3. Hat jemand irgendwelche Kenntnisse darüber, wie man das funktioniert?Wiegand 26 Protokoll auf Android Things
Hier ist die Arduino library.
Hier ist der portiert Code:
/**
* @author bilal
*/
public class Wiegand {
public static final String TAG = "thing:Wiegand";
long cardTempHigh = 0;
long cardTemp = 0;
long lastWiegand = 0;
long sysTick = 0;
long code = 0;
int bitCount = 0;
int wiegandType = 0;
///
long codehigh, codelow;
private static final String GPIO_PIN_D0_Name = "BCM4";
private static final String GPIO_PIN_D1_Name = "BCM5";
private Gpio mWiegand34GpioD0;
private Gpio mWiegand34GpioD1;
public void begin() {
System.out.println("wiegand begin");
lastWiegand = 0;
cardTempHigh = 0;
cardTemp = 0;
code = 0;
wiegandType = 0;
bitCount = 0;
sysTick = System.currentTimeMillis();
// final GpioPinDigitalInput D0Pin = gpio.provisionDigitalInputPin(RaspiPin.GPIO_00, PinPullResistance.PULL_UP);
// final GpioPinDigitalInput D1Pin = gpio.provisionDigitalInputPin(RaspiPin.GPIO_07, PinPullResistance.PULL_UP);
PeripheralManagerService service = new PeripheralManagerService();
Log.d("thing:Wiegand (begin)", "Available GPIO: " + service.getGpioList());
try {
// Step 1. Create GPIO connection.
mWiegand34GpioD0 = service.openGpio(GPIO_PIN_D0_Name);
mWiegand34GpioD1 = service.openGpio(GPIO_PIN_D1_Name);
// Step 2. Configure as an input.
mWiegand34GpioD0.setDirection(Gpio.DIRECTION_IN);
mWiegand34GpioD1.setDirection(Gpio.DIRECTION_IN);
// Step 3. Enable edge trigger events.
mWiegand34GpioD0.setEdgeTriggerType(Gpio.EDGE_FALLING);
mWiegand34GpioD1.setEdgeTriggerType(Gpio.EDGE_FALLING);
//Testing what this do
//mWiegand34GpioD0.setActiveType(Gpio.ACTIVE_HIGH);
// Step 4. Register an event callback.
mWiegand34GpioD0.registerGpioCallback(data_pulse0);
mWiegand34GpioD1.registerGpioCallback(data_pulse1);
} catch (IOException e) {
Log.e(TAG, "Error on PeripheralIO API", e);
}
//attachInterrupt(0, ReadD0, FALLING); // Hardware interrupt - high to low pulse
//attachInterrupt(1, ReadD1, FALLING); // Hardware interrupt - high to low pulse
}
private GpioCallback data_pulse0 = new GpioCallback() {
@Override
public boolean onGpioEdge(Gpio gpio) {
bitCount++; // Increament bit count for Interrupt connected to D0
if (bitCount > 31) { // If bit count more than 31, process high bits
cardTempHigh |= ((0x80000000 & cardTemp) >> 31); // shift value to high bits
cardTempHigh = 1;
cardTemp = 1;
} else {
cardTemp = 1; // D0 represent binary 0, so just left shift card data
}
lastWiegand = sysTick; // Keep track of last wiegand bit received
Log.d(TAG + "data_pulse0)", cardTemp + "");
return true;
}
};
private GpioCallback data_pulse1 = new GpioCallback() {
@Override
public boolean onGpioEdge(Gpio gpio) {
bitCount++; // Increment bit count for Interrupt connected to D1
if (bitCount > 31) { // If bit count more than 31, process high bits
cardTempHigh |= ((0x80000000 & cardTemp) >> 31); // shift value to high bits
cardTempHigh = 1;
cardTemp |= 1;
cardTemp = 1;
} else {
cardTemp |= 1; // D1 represent binary 1, so OR card data with 1 then
cardTemp = 1; // left shift card data
}
lastWiegand = sysTick; // Keep track of last wiegand bit received
Log.d(TAG + "data_pulse1)", cardTemp + "");
return true;
}
};
boolean available() {
return DoWiegandConversion();
}
public long getCode() {
return code;
}
long GetCardId(char bitlength) {
long cardID = 0;
if (bitlength == 26) // EM tag
cardID = (codelow & 0x1FFFFFE) >> 1;
if (bitlength == 34) { // Mifare
codehigh = codehigh & 0x03; // only need the 2 LSB of the codehigh
codehigh = 30; // shift 2 LSB to MSB
codelow = 1;
cardID = codehigh | codelow;
}
Log.d(TAG + "(GetCardId)", cardID + "");
System.out.println("cardID:" + cardID);
return cardID;
}
public boolean DoWiegandConversion() {
long cardID;
sysTick = System.currentTimeMillis();
if ((sysTick - lastWiegand) > 25) { // if no more signal coming through after 25ms
if ((bitCount == 26) || (bitCount == 34) || (bitCount == 8)) { // bitCount for keypress=8, Wiegand 26=26, Wiegand 34=34
cardTemp >>= 1; // shift right 1 bit to get back the real value - interrupt done 1 left shift in advance
if (bitCount > 32) // bit count more than 32 bits, shift high bits right to make adjustment
cardTempHigh >>= 1;
if ((bitCount == 26) || (bitCount == 34)) { // wiegand 26 or wiegand 34
cardID = GetCardId((char) bitCount);
wiegandType = bitCount;
bitCount = 0;
cardTemp = 0;
cardTempHigh = 0;
code = cardID;
return true;
} else if (bitCount == 8) { // keypress wiegand
// 8-bit Wiegand keyboard data, high nibble is the "NOT" of low nibble
// eg if key 1 pressed, data=E1 in binary 11100001 , high nibble=1110 , low nibble = 0001
char highNibble = (char) ((cardTemp & 0xf0) >> 4);
char lowNibble = (char) (cardTemp & 0x0f);
wiegandType = bitCount;
bitCount = 0;
cardTemp = 0;
cardTempHigh = 0;
if (lowNibble == (~highNibble & 0x0f)) { // check if low nibble matches the "NOT" of high nibble.
if (lowNibble == 0x0b) { // ENT pressed
code = 0x0d;
} else if (lowNibble == 0x0a) { // ESC pressed
code = 0x1b;
} else {
code = (int) lowNibble; // 0 - 9 keys
}
return true;
}
}
} else {
// well time over 25 ms and bitCount !=8 , !=26, !=34 , must be noise or nothing then.
lastWiegand = sysTick;
bitCount = 0;
cardTemp = 0;
cardTempHigh = 0;
return false;
}
}
return false;
}
}
und rief aus meiner Tätigkeit hier:
Wiegand wiegand = new Wiegand();
wiegand.begin();
Log.d(TAG, wiegand.getCode() + "");