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| 1 | // KY-040 ... ESP32 |
| 2 | // CLK ... PIN 4 |
| 3 | // DT ... PIN 2 |
| 4 | // SW ... PIN 5 |
| 5 | // + ... 3.3V |
| 6 | // GND ... GND |
| 7 | |
| 8 | #include <Arduino.h> |
| 9 | |
| 10 | long int rotValue=0, swValue=0; |
| 11 | uint8_t state=0; |
| 12 | |
| 13 | |
| 14 | #define ROTARY_PINA 2 |
| 15 | #define ROTARY_PINB 4 |
| 16 | #define ROTARY_PINSW 5 |
| 17 | |
| 18 | portMUX_TYPE gpioMux = portMUX_INITIALIZER_UNLOCKED; |
| 19 | |
| 20 | void IRAM_ATTR isrAB() { |
| 21 | uint8_t s = state & 3; |
| 22 | |
| 23 | portENTER_CRITICAL_ISR(&gpioMux); |
| 24 | if (digitalRead(ROTARY_PINA)) s |= 4; |
| 25 | if (digitalRead(ROTARY_PINB)) s |= 8; |
| 26 | switch (s) { |
| 27 | case 0: case 5: case 10: case 15: |
| 28 | break; |
| 29 | case 1: case 7: case 8: case 14: |
| 30 | rotValue++; break; |
| 31 | case 2: case 4: case 11: case 13: |
| 32 | rotValue--; break; |
| 33 | case 3: case 12: |
| 34 | rotValue += 2; break; |
| 35 | default: |
| 36 | rotValue -= 2; break; |
| 37 | } |
| 38 | state = (s >> 2); |
| 39 | portEXIT_CRITICAL_ISR(&gpioMux); |
| 40 | |
| 41 | } |
| 42 | |
| 43 | |
| 44 | void IRAM_ATTR isrSWAll() { |
| 45 | |
| 46 | portENTER_CRITICAL_ISR(&gpioMux); |
| 47 | swValue++; |
| 48 | portEXIT_CRITICAL_ISR(&gpioMux); |
| 49 | |
| 50 | } |
| 51 | |
| 52 | void setup(){ |
| 53 | pinMode(ROTARY_PINA, INPUT_PULLUP); |
| 54 | pinMode(ROTARY_PINB, INPUT_PULLUP); |
| 55 | pinMode(ROTARY_PINSW, INPUT_PULLUP); |
| 56 | |
| 57 | attachInterrupt(ROTARY_PINA, isrAB, CHANGE); |
| 58 | attachInterrupt(ROTARY_PINB, isrAB, CHANGE); |
| 59 | attachInterrupt(ROTARY_PINSW, isrSWAll, CHANGE); |
| 60 | Serial.begin(115200); |
| 61 | } |
| 62 | |
| 63 | |
| 64 | void loop(){ |
| 65 | Serial.print("isrSWAll "); |
| 66 | Serial.print(swValue); |
| 67 | Serial.print(" rotValue "); |
| 68 | Serial.println(rotValue); |
| 69 | delay(1000); |
| 70 | } |
| 71 | |
| 72 | |