Diff: main.cpp

Revision:

0:ee21c9a5f330

diff -r 000000000000 -r ee21c9a5f330 main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Oct 04 12:05:27 2016 +0000
@@ -0,0 +1,81 @@
+/*
+ * aitendo 4x4 keypad Test
+ *
+ * 2016.10.04
+ *
+ */
+#include "mbed.h"
+#include "rtos.h"
+
+const char keypadChar [] = {
+  'C', 'D', 'E', 'F',
+  '9', '0', 'A', 'B',
+  '5', '6', '7', '8',
+  '1', '2', '3', '4',  
+};
+
+BusIn KeypadIn(PA_13, PA_14, PA_15, PB_7);
+BusOut KeypadOut(PC_13, PA_9, PA_8, PB_10);
+
+//------------------------------------------------------
+// keyScan1(): 押されているキー
+// return: キースキャンの結果 0..15
+//         押されていない場合は -1
+//------------------------------------------------------
+int keyScan1()
+{
+  int i, j;
+  for (i = 0; i < 4; i++) {
+    KeypadOut[i] = 1;
+    for (j = 0; j < 4; j++) {
+      if (KeypadIn[j] == 1) {
+        KeypadOut[i] = 0;
+        return i * 4 + j;
+      }
+    }
+    KeypadOut[i] = 0;
+  }
+  return -1;
+}
+
+//------------------------------------------------------
+// keyScan(): 押して離されたキー
+// return: キースキャンの結果 0..15
+//         変化がない場合は -1
+//------------------------------------------------------
+int keyScan()
+{
+    static int keyBuff;
+    int kv, kvv;
+
+    // チャタリング防止
+    kv = keyScan1();
+    Thread::wait(10);
+    kvv = keyScan1();
+
+    if (kv == kvv) {
+        if (kv != keyBuff) {
+            keyBuff = kv;
+            return kv;
+        }
+    }
+    return -1;
+}
+    
+int main()
+{
+    printf("\r\n\r\n*** RTOS 4x4 Keypad Test ***\r\n");
+    
+    KeypadIn.mode(PullDown);
+    
+    for (int i = 0; i < 4; i++) {
+        KeypadOut[i] = 0;
+    }
+    
+    while (true) {
+        int v = keyScan();
+        if (v != -1) {
+            printf("%c", keypadChar[v]);
+        }
+    }
+}