First init.

libraries/Adafruit_seesaw_Library/examples/encoder/PID5740_ANOencoder_demo/PID5740_ANOencoder_demo.ino

@@ -0,0 +1,83 @@
+/*
+ * This example shows how to read from a seesaw encoder module.
+ * The available encoder API is:
+ *      int32_t getEncoderPosition();
+        int32_t getEncoderDelta();
+        void enableEncoderInterrupt();
+        void disableEncoderInterrupt();
+ */
+#include "Adafruit_seesaw.h"
+
+#define SS_SWITCH_SELECT 1
+#define SS_SWITCH_UP     2
+#define SS_SWITCH_LEFT   3
+#define SS_SWITCH_DOWN   4
+#define SS_SWITCH_RIGHT  5
+
+#define SEESAW_ADDR      0x49
+
+Adafruit_seesaw ss;
+int32_t encoder_position;
+
+void setup() {
+  Serial.begin(115200);
+  while (!Serial) delay(10);
+
+  Serial.println("Looking for seesaw!");
+  
+  if (! ss.begin(SEESAW_ADDR)) {
+    Serial.println("Couldn't find seesaw on default address");
+    while(1) delay(10);
+  }
+  Serial.println("seesaw started");
+  uint32_t version = ((ss.getVersion() >> 16) & 0xFFFF);
+  if (version  != 5740){
+    Serial.print("Wrong firmware loaded? ");
+    Serial.println(version);
+    while(1) delay(10);
+  }
+  Serial.println("Found Product 5740");
+
+  ss.pinMode(SS_SWITCH_UP, INPUT_PULLUP);
+  ss.pinMode(SS_SWITCH_DOWN, INPUT_PULLUP);
+  ss.pinMode(SS_SWITCH_LEFT, INPUT_PULLUP);
+  ss.pinMode(SS_SWITCH_RIGHT, INPUT_PULLUP);
+  ss.pinMode(SS_SWITCH_SELECT, INPUT_PULLUP);
+
+  // get starting position
+  encoder_position = ss.getEncoderPosition();
+
+  Serial.println("Turning on interrupts");
+  ss.enableEncoderInterrupt();
+  ss.setGPIOInterrupts((uint32_t)1 << SS_SWITCH_UP, 1);
+
+}
+
+void loop() {
+  if (! ss.digitalRead(SS_SWITCH_UP)) {
+    Serial.println("UP pressed!");
+  }
+  if (! ss.digitalRead(SS_SWITCH_DOWN)) {
+    Serial.println("DOWN pressed!");
+  }
+  if (! ss.digitalRead(SS_SWITCH_SELECT)) {
+    Serial.println("SELECT pressed!");
+  }
+  if (! ss.digitalRead(SS_SWITCH_LEFT)) {
+    Serial.println("LEFT pressed!");
+  }
+  if (! ss.digitalRead(SS_SWITCH_RIGHT)) {
+    Serial.println("RIGHT pressed!");
+  }
+
+  int32_t new_position = ss.getEncoderPosition();
+  // did we move around?
+  if (encoder_position != new_position) {
+    Serial.println(new_position);         // display new position
+
+    encoder_position = new_position;      // and save for next round
+  }
+
+  // don't overwhelm serial port
+  delay(10);
+}