Diff: RotaryEncoder.cpp

Revision:

0:6537b3b709b6

Child:

1:8000eddbf4aa

diff -r 000000000000 -r 6537b3b709b6 RotaryEncoder.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/RotaryEncoder.cpp	Sun Dec 19 05:03:45 2010 +0000
@@ -0,0 +1,75 @@
+/**
+ * =============================================================================
+ * Rotary Encoder class (Version 0.0.1)
+ * =============================================================================
+ * Copyright (c) 2010 Shinichiro Nakamura (CuBeatSystems)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ * =============================================================================
+ */
+
+#include "RotaryEncoder.h"
+
+/**
+ * Create rotary encoder.
+ *
+ * @param pin1_name
+ * @param pin2_name
+ * @param min Minimum value.
+ * @param max Maximum value.
+ * @param val Default value.
+ */
+RotaryEncoder::RotaryEncoder(PinName pin1_name, PinName pin2_name, int min, int max, int val)
+        : pin1(pin1_name), pin2(pin2_name), min(min), max(max), val(val) {
+    pin1.mode(PullUp);
+    pin2.mode(PullUp);
+    ticker.attach_us(this, &RotaryEncoder::func_ticker, 500);
+}
+
+/**
+ * Dispose.
+ */
+RotaryEncoder::~RotaryEncoder() {
+}
+
+/**
+ * Internal tick function.
+ */
+void RotaryEncoder::func_ticker() {
+    static uint8_t code;
+
+    code = (code << 2) + (((pin1.read() << 1) | (pin2.read() << 0)) & 3);
+    code &= 15;
+    switch (i) {
+        case 0x7:
+            if (min < val) {
+                val--;
+            } else {
+                val = min;
+            }
+            break;
+        case 0xd:
+            if (val < max) {
+                val++;
+            } else {
+                val = max;
+            }
+            break;
+    }
+}