Diff: keypad4x4.h

Revision:

0:78b84e1ce9df

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/keypad4x4.h	Tue Feb 18 21:16:23 2020 +0000
@@ -0,0 +1,156 @@
+#ifndef KEYPAD4x4_H
+#define KEYPAD4x4_H
+
+/*
+    +-----------------+
+    | +-+ +-+ +-+ +-+ |
+    | |1| |2| |3| |A| |
+    | +-+ +-+ +-+ +-+ |
+    | +-+ +-+ +-+ +-+ |
+    | |4| |5| |5| |B| |
+    | +-+ +-+ +-+ +-+ |
+    | +-+ +-+ +-+ +-+ |
+    | |7| |8| |9| |C| |
+    | +-+ +-+ +-+ +-+ |
+    | +-+ +-+ +-+ +-+ |
+    | |*| |0| |#| |D| |
+    | +-+ +-+ +-+ +-+ |
+    +-----------------+
+    | o o o o o o o o |  
+      C C C C R R R R
+      O O O O O O O O
+      L L L L W W W W
+      0 1 2 3 0 1 2 3
+    
+*/      
+                            
+#ifndef BIT
+#define BIT(N) (1 << (N))
+#endif
+
+//BusOut keypad4x4_columns(KEYPAD4X4_COLUMN0, KEYPAD4X4_COLUMN1, KEYPAD4X4_COLUMN2, KEYPAD4X4_COLUMN3);
+//BusIn keypad4x4_rows(KEYPAD4X4_ROW0, KEYPAD4X4_ROW1, KEYPAD4X4_ROW2, KEYPAD4X4_ROW3);
+BusOut keypad4x4_columns(PTE19, PTE18, PTE17, PTE16);
+BusIn keypad4x4_rows(PTA14, PTA15, PTA16, PTA17);
+InterruptIn keypad4x4_interrupt(PTC16);
+
+#define KEYPAD4X4_TYPE_MIN 0
+#define KEYPAD4X4_TELEPHONE 0
+#define KEYPAD4X4_TELEPHONE_ALT 1
+#define KEYPAD4X4_HEXADECIMAL 2
+#define KEYPAD4X4_TYPE_MAX 2
+#define KEYPAD4X4_TYPE_DEFAULT KEYPAD4X4_TELEPHONE_ALT
+
+#ifndef KEYPAD4X4_TYPE
+#define KEYPAD4X4_TYPE KEYPAD4X4_TYPE_DEFAULT
+#endif /* #ifndef KEYPAD4X4_TYPE */
+
+#if (KEYPAD4X4_TYPE < KEYPAD4X4_TYPE_MIN) || (KEYPAD4X4_TYPE > KEYPAD4X4_TYPE_MAX)
+#warning "invalid KEYPAD4X4_TYPE specified, default KEYPAD4X4_TYPE used"
+#undef KEYPAD4X4_TYPE
+#define KEYPAD4X4_TYPE KEYPAD4X4_TYPE_DEFAULT
+#endif  /* #if (KEYPAD4X4_TYPE < KEYPAD4X4_TYPE_MIN) || (KEYPAD4X4_TYPE > KEYPAD4X4_TYPE_MAX) */
+
+int keypad4x4_type=KEYPAD4X4_TYPE;
+
+char keypad4x4_ASCII[KEYPAD4X4_TYPE_MAX+1][4][4]={ 
+                                        {{'1','2','3','A'},{'4','5','6','B'},{'7','8','9','C'},{'*','0','#','D'}}, 
+                                        {{'1','2','3','A'},{'4','5','6','B'},{'7','8','9','C'},{'E','0','F','D'}}, 
+                                        {{'0','1','2','3'},{'4','5','6','7'},{'8','9','A','B'},{'C','D','E','F'}} };
+/* KEYPAD4X4_ASCII[0][][] is KEYPAD4X4_TELEPHONE (e.g. '*' and '#') */                                     
+/* KEYPAD4X4_ASCII[1][][] is KEYPAD4X4_TELEPHONE_ALT (e.g. 'E' and 'F')*/ 
+/* KEYPAD4X4_ASCII[2][][] is KEYPAD4X4_HEXADECIMAL (e.g. 0-F in order) */ 
+
+int keypad4x4_set_type(int type)
+{
+    if((type < KEYPAD4X4_TYPE_MIN) || (type > KEYPAD4X4_TYPE_MAX)) { type=KEYPAD4X4_TYPE_DEFAULT; }
+    keypad4x4_type=type;
+    return(keypad4x4_type);
+}
+
+int keypad4x4_query(char *key_value, int * key_row, int *key_column)
+{
+    int row, column, temp, type;
+    keypad4x4_rows.mode(PullDown);
+
+    if((keypad4x4_type < KEYPAD4X4_TYPE_MIN) || (keypad4x4_type > KEYPAD4X4_TYPE_MAX)) 
+    { 
+        keypad4x4_type=KEYPAD4X4_TYPE_DEFAULT; 
+    }
+
+    keypad4x4_columns=0xF;
+    if(keypad4x4_rows == 0)
+    {
+        *key_row=-1;
+        *key_column=-1;
+        *key_value='\0';
+        return(-1);          
+    }   
+
+    for (column=0; column < 4; column++)
+    {
+       row=4;
+//       keypad4x4_columns=(1<<column);
+       keypad4x4_columns=BIT(column);
+       temp=keypad4x4_rows;
+       if (temp != 0)
+       {
+            for(row=0; row <4; row++)
+            {
+//                if((temp & (1<<row)) != 0)
+                if((temp & BIT(row)) != 0)
+                {
+                    break;
+                }
+            } 
+        }
+        if(row<4)
+        {
+            *key_row=row;
+            *key_column=column;
+            *key_value=keypad4x4_ASCII[keypad4x4_type][row][column];
+            while(keypad4x4_rows != 0) {}   
+//            wait(0.01);          
+            return((row<<2)+column);
+        }
+        else
+        {
+            *key_row=-1;
+            *key_column=-1;
+            *key_value='\0';
+            return(-1);          
+        }
+   }
+   return(-3);
+}   /* end of KEYPAD4X4_query() */
+
+char keypad4x4_getc(void)
+{
+    int row, column, type, temp;
+    char c;
+    while((temp=keypad4x4_query(&c, &row, &column)) < 0)
+    { }
+    return(c);
+ 
+}   /* end of keypad4x4_getc() */
+    
+int keypad4x4_input(char *key_value, int * key_row, int *key_column)
+{
+    int row, column, temp, type;
+    char c;
+
+    while((temp=keypad4x4_query(&c, &row, &column)) < 0)
+    { }
+    *key_row=row;
+    *key_column=column;
+    *key_value=c;    
+    return(temp);
+
+
+}   /* end of KEYPAD4X4_input() */
+
+
+
+
+
+#endif /* #ifndef KEYPAD4x4_H */
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