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lib/BasicEncoder/examples/poll-in-loop/poll-in-loop.ino

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+/*
+ Copyright 2021 Peter Harrison - Helicron
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+      https://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+
+ This example creates a single encoder instance that is updated by
+ running the service method directly in the main program loop. This
+ must be called frequently enough to avoid missing any pin changes. That
+ means several hundred times a second in many cases. If a change is detected
+ in the main loop, the current count is sent to the serial port.
+ 
+ You can add a delay into the loop in this eample to see just how often you
+ need to call the service method and still get reliable counts.
+ */
+
+#include <Arduino.h>
+#include <BasicEncoder.h>
+
+const int8_t pinA = 2;
+const int8_t pinB = 3;
+
+BasicEncoder encoder(pinA, pinB);
+
+void setup() {
+  Serial.begin(115200);
+  Serial.println(F("Polling in loop()"));
+}
+
+void loop() {
+  encoder.service();
+  int encoder_change = encoder.get_change();
+  if (encoder_change) {
+    Serial.println(encoder.get_count());
+  } 
+  // Even a short delay here will affect performance.
+  // Uncomment and change the delay to see what happens.
+  //delay(10);
+}