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66 lines
1.9 KiB
66 lines
1.9 KiB
2 years ago
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/*
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Copyright 2021 Peter Harrison - Helicron
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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https://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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This example creates a single encoder instance that is updated by
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pin-change interrupts associated with the two pins. If a change is detected
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in the main loop, the current count is sent to the serial port.
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Note that if you enable pin change interrupts for other pins in the same
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group, you may cause conflicts.
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*/
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#include <Arduino.h>
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#include <BasicEncoder.h>
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const int8_t pinA = 2;
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const int8_t pinB = 3;
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BasicEncoder encoder(pinA, pinB);
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void pciSetup(byte pin) // Setup pin change interupt on pin
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{
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*digitalPinToPCMSK(pin) |= bit(digitalPinToPCMSKbit(pin)); // enable pin
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PCIFR |= bit(digitalPinToPCICRbit(pin)); // clear outstanding interrupt
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PCICR |= bit(digitalPinToPCICRbit(pin)); // enable interrupt for group
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}
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void setup_encoders(int a, int b) {
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uint8_t old_sreg = SREG; // save the current interrupt enable flag
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noInterrupts();
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pciSetup(a);
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pciSetup(b);
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encoder.reset();
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SREG = old_sreg; // restore the previous interrupt enable flag state
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}
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ISR(PCINT2_vect) // pin change interrupt for D0 to D7
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{
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encoder.service();
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}
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void setup() {
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Serial.begin(115200);
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Serial.println("Interrupts");
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setup_encoders(pinA,pinB);
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encoder.set_reverse();
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}
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void loop() {
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int encoder_change = encoder.get_change();
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if (encoder_change) {
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Serial.println(encoder.get_count());
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}
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}
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