test/keypad_test.c

   1 /*******************************************************************************
   2  *    File Name : keypad_test.c
   3  *
   4  *       Author : Henry He
   5  * Created Time : Fri 27 Nov 2009 09:55:20 AM CST
   6  *  Description :
   7  ******************************************************************************/
   8
   9
  10 /*******************************************************************************
  11  * Desc : Includes Files
  12  ******************************************************************************/
  13 #include <stdio.h>
  14 #include <stdlib.h>
  15 #include <stdarg.h>
  16 #include <unistd.h>
  17 #include <string.h>
  18 #include <fcntl.h>
  19 #include <signal.h>
  20
  21
  22 /*******************************************************************************
  23  * Desc : Macro Definations
  24  ******************************************************************************/
  25
  26
  27 /*******************************************************************************
  28  * Desc : Type Definations
  29  ******************************************************************************/
  30
  31
  32 /*******************************************************************************
  33  * Desc : Global Variables
  34  ******************************************************************************/
  35
  36
  37 /*******************************************************************************
  38  * Desc : File Variables
  39  ******************************************************************************/
  40 static int  fdKeyPad = -1;
  41
  42 /******************************************************************************
  43  * Func :
  44  * Desc :
  45  * Args :
  46  * Outs :
  47  ******************************************************************************/
  48 void SignalHandler (int nSignal)
  49 {
  50   (void)nSignal;
  51   close (fdKeyPad);
  52   printf ("SignalHandler: exit\n");
  53   exit (1);
  54 }
  55
  56 /******************************************************************************
  57  * Func :
  58  * Desc :
  59  * Args :
  60  * Outs :
  61  ******************************************************************************/
  62 int main ( int argc, char *argv[] )
  63 {
  64   int  nRetVal;
  65   char cKey;
  66
  67   (void)argc;
  68   (void)argv;
  69
  70   signal (SIGKILL, SignalHandler);
  71   signal (SIGTERM, SignalHandler);
  72   signal (SIGHUP, SignalHandler);
  73   signal (SIGINT, SignalHandler);
  74
  75 #if 0
  76   pthread_create ();
  77 #endif
  78
  79   fdKeyPad = open ("/dev/keypad", O_RDONLY);
  80   if (fdKeyPad < 0) {
  81     printf ("can't open keypad\n");
  82     return -1;
  83   }
  84
  85   do {
  86     nRetVal = read (fdKeyPad, &cKey, sizeof(cKey));
  87     if (nRetVal < 0) {
  88       break;
  89     }
  90     printf ("READ KEY %c\n", cKey);
  91   } while (1);
  92
  93         return 0;
  94 }                               /* ----------  end of function main  ---------- */
  95
  96
  97