key_3x4.cpp

00001 /*
00002  * Mbed Application program
00003  *  example:
00004  *      Akizuki AE-KIT45-KEYPAD4X3
00005  *      http://akizukidenshi.com/catalog/g/gK-12229/
00006  *
00007  * Copyright (c) 2017,'20 Kenji Arai / JH1PJL
00008  *  http://www7b.biglobe.ne.jp/~kenjia/
00009  *  https://os.mbed.com/users/kenjiArai/
00010  *      Created:    September 27th, 2017
00011  *      Revised:    April     13th, 2020
00012  */
00013 
00014 //  Pre-selection --------------------------------------------------------------
00015 #include    "select_example.h"
00016 //#define KEY3X4
00017 #ifdef KEY3X4
00018 
00019 //  Include --------------------------------------------------------------------
00020 #include "mbed.h"
00021 #include "Keypad.h"
00022 
00023 //  Definition -----------------------------------------------------------------
00024 
00025 //  Object ---------------------------------------------------------------------
00026 DigitalOut  my_led(LED1);
00027 Serial      pc(USBTX,USBRX);
00028 //              X    Y    Z   A   B   C   D   OUT(XYZ), IN(ABCD)
00029 Keypad      key(D11, D10, D9, D6, D5, D4, D3);
00030 
00031 //  RAM ------------------------------------------------------------------------
00032 
00033 //  ROM / Constant data --------------------------------------------------------
00034 //                          X*A = *, X*B = 7, X*C = 4, X*D = 1
00035 //                          Y*A = 0, Y*B = 8, Y*C = 5, Y*D = 2
00036 //                          Z*A = #, Z*B = 9, Z*C = 6, Z*D = 3
00037 //                          key_table[0]=? is not used!
00038 const char *const key_table = "?*7410852#963";
00039 //                              123456789012
00040 
00041 //  Function prototypes --------------------------------------------------------
00042 
00043 //------------------------------------------------------------------------------
00044 //  Control Program
00045 //------------------------------------------------------------------------------
00046 int main()
00047 {
00048     uint32_t key_num;
00049     uint32_t counter = 0;
00050 
00051     pc.printf("Start Key-Pad test 3x4 keys\r\n");
00052     while(true) {
00053         while ((key_num = key.read()) != 0) {
00054             pc.printf("%2u:[%2d] %c\r\n",
00055                       counter++, key_num, *(key_table + key_num));
00056         }
00057         wait_us(100000);
00058     }
00059 }
00060 
00061 #endif  // #ifdef KEY3X4