Cleanup code structure and add some comments
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@ -1,23 +1,11 @@
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/* Based on:
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* HID RFID Reader Wiegand Interface for Arduino Uno
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* Originally by Daniel Smith, 2012.01.30 -- http://www.pagemac.com/projects/rfid/arduino_wiegand
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*
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* Updated 2016-11-23 by Jon "ShakataGaNai" Davis.
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* See https://obviate.io/?p=7470 for more details & instructions
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*/
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// Based on: http://www.pagemac.com/projects/rfid/arduino_wiegand
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#include <limits.h>
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#include <Keyboard.h>
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// DATA pins
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#define DATA0 2
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#define DATA1 3
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// LED pins
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#define LED_GREEN 11;
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#define LED_RED 12;
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#define BEEP_BEEP 10;
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#define WEIGAND_WAIT_TIME 500 // time to wait for another weigand pulse.
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#define DATA_SIZE 32
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@ -33,15 +21,9 @@ inline void gotBit(char bit) {
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bitCount++;
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}
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// interrupt that happens when INTO goes low (0 bit)
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void ISR_INT0() {
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gotBit(0);
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}
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// interrupt that happens when INT1 goes low (1 bit)
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void ISR_INT1() {
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gotBit(1);
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}
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// interrupts for DATA0/DATA1
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void ISR_INT0() { gotBit(0); }
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void ISR_INT1() { gotBit(1); }
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void setup() {
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pinMode(DATA0, INPUT);
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@ -57,7 +39,7 @@ void setup() {
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void loop()
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{
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// if we have bits and we the weigand counter went out
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// Check if last bit was recieved more than WEIGAND_WAIT_TIME ago
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if (bitCount > 0 && (millis() - weigand_idle_start) >= WEIGAND_WAIT_TIME) {
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unsigned char i;
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uint32_t data = dataBits >> (DATA_SIZE - bitCount + 1);
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@ -75,10 +57,6 @@ void loop()
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uint16_t cardCode = (data >> 1) & 0xFFFF;
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// TODO: check parity bits
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Keyboard.print(facilityCode);
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Keyboard.print('\t');
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Keyboard.print(cardCode);
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Keyboard.print('\n');
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printBits(facilityCode, cardCode);
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}
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else {
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@ -91,6 +69,11 @@ void loop()
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}
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void printBits(uint8_t facilityCode, uint16_t cardCode) {
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Keyboard.print(facilityCode);
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Keyboard.print('\t');
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Keyboard.print(cardCode);
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Keyboard.print('\n');
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Serial.print("FC = ");
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Serial.print(facilityCode);
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Serial.print(", CC = ");
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