105 rader
1.9 KiB
C++
105 rader
1.9 KiB
C++
#include <TimerOne.h>
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// config:
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const int pinData = 6;
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const int pinStatus = 7;
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// fixed values
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const int timerDelay = 500;
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void setup(void)
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{
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pinMode(pinData, OUTPUT);
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digitalWrite(pinData, HIGH);
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Timer1.initialize(timerDelay);
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Timer1.attachInterrupt(clockCycle);
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Timer1.stop();
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pinMode(pinStatus, INPUT_PULLUP);
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attachInterrupt(digitalPinToInterrupt(pinStatus), statusCycle, CHANGE);
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Serial.begin(9600);
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}
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volatile long lastChange = 0;
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volatile int x = 0;
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volatile int dataWord = 0;
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volatile int dataState = 0;
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volatile int dataDelay = 0;
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volatile int packetDelay = 0;
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volatile int packetTail = 0;
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volatile int clkState = HIGH;
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volatile bool nextKeyReady = false;
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volatile byte nextKey = 0;
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void typeKey(byte key) {
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noInterrupts();
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nextKeyReady = true;
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nextKey = key;
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interrupts();
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}
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void sendKey(byte key) {
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noInterrupts();
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dataWord = key;
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dataState = 8;
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dataDelay = 0;
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packetDelay = 0;
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packetTail = 10;
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clkState = HIGH;
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interrupts();
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Timer1.initialize(timerDelay);
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Timer1.start();
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}
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void statusCycle() {
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long timeNow = millis();
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long changeDiff = timeNow - lastChange;
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lastChange = timeNow;
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if (changeDiff >= 10 && nextKeyReady) {
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sendKey(nextKey);
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nextKeyReady = false;
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}
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}
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void clockCycle(void)
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{
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int dataBit = HIGH;
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if (clkState == LOW) {
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clkState = HIGH;
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} else {
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clkState = LOW;
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}
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if (packetDelay > 0) {
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packetDelay--;
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} else if (dataDelay > 0) {
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dataDelay--;
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dataBit = LOW;
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} else if (dataState > 0) {
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int bitToSend = (dataWord >> (dataState - 1)) & 1;
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dataBit = !bitToSend ? LOW : HIGH;
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dataState--;
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} else if (packetTail > 0) {
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packetTail--;
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dataBit = LOW;
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} else {
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Timer1.stop();
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}
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digitalWrite(pinData, dataBit);
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}
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void loop(void)
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{
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delay(50);
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if (Serial.available() > 0) {
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long key = Serial.parseInt(SKIP_ALL);
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if (key != 0) {
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typeKey(key);
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}
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}
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}
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