Gert Jan Schoneveld / Mbed 2 deprecated SaveKeypad

Tests forked Keypad library.

Dependencies:   FPointer keypad mbed

Schematic:

http://schind.nl/keypad.png

No extra hardware is needed besides the wires and switches. The columns are outputs configured with open drain. The rows are inputs configured with pull up resistors. A key press pulls down its row. With scanning the column is determined thereafter.

See keypad for the forked library used in this project.

Diff: main.cpp

Revision:
3:fb173f712440
Parent:
2:eaa3d23e9b29
Child:
4:16191e501b63
--- a/main.cpp	Sat Nov 03 23:45:20 2012 +0000
+++ b/main.cpp	Sun Nov 04 09:50:00 2012 +0000
@@ -18,6 +18,19 @@
     return 0;
 }
 
+uint32_t cbAfterMultipleInput(uint32_t key)
+{
+    for (int i = 0; i < 16; i++) {
+        if (key & (1 << i)) {
+             printf("Key: %d => \'%c\'\t", i, Keytable[i]);
+        }
+    }
+    printf("\n");
+    code = key;
+
+    return 0;
+}
+
 void Sleep(void)
 {
     __WFI();
@@ -30,22 +43,31 @@
     Keypad keypad(p25, p26, p27, p28, p21, p22, p23, p24);
 
 // interrupt mode
+/*
     keypad.CallAfterInput(&cbAfterInput);
     keypad.Start();
     while (1) {
         Sleep();
     }
+*/
     
 // polling mode
 /*
     keypad.Start();
-    
-    int key = -1;
     while (1) {
-        key = keypad.DebouncedScan();
+        int key = keypad.DebouncedScan();
         if (key >= 0)
             cbAfterInput(key);
         wait(0.1);
     }
 */
+
+// poll multiple mode
+    keypad.Start();
+    while (1) {
+        key = keypad.DebouncedScanMultiple();
+        if (key > 0)
+            cbAfterMultipleInput(key);
+        wait(0.1);
+    }
 }
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