1 /*

     2  * Source File : me8100_test_dio.c

     3  * Destination : me8100_test_dio

     4  * Author      : GG (Guenter Gebhardt)                                 

     5  *    

     6  *                                                                     

     7  * File History: Version   Date       Editor   Action                  

     8  *---------------------------------------------------------------------

     9  *               1.00.00   01.07.12   GG       first release           

    10  *                                                                     

    11  *---------------------------------------------------------------------

    12  *                                                                     

    13  * Description:

    14  *   This program shows the use of the driver and the digital inputs

    15  *   and outputs. First the outputs are tested in sink and source mode. 

    16  *   Then the inputs are tested.

    17  */

    18 #include <stdio.h>

    19 #include <fcntl.h>

    20 #include <unistd.h>

    21 #include <sys/ioctl.h>

    22 #include <signal.h>

    23 

    24 #include "me8100.h"

    25 

    26 int main(void){

    27   int err = 0;

    28   static int file_handle = -1;

    29 

    30   unsigned short ctrl_a;

    31   unsigned short value_a;

    32 

    33   printf("Write test, PID: %d\n", getpid());

    34   file_handle = open("/dev/me8100_0", O_RDWR, 0);

    35 

    36   if(file_handle < 0){

    37     printf("Cannot open path !\n");

    38     return 1;

    39   }

    40 

    41   /* Write.

    42    * HACK: The driver itself should remember the status

    43    * of the IRQ bits in its control register

    44    */

    45   ctrl_a = ME8100_CTL_ENIO | ME8100_CTL_SOURCE | ME8100_CTL_IRQ_MASK;

    46   err = ioctl(file_handle, ME8100_WRITE_CTRL_A, &ctrl_a);

    47   if (err) {

    48     fprintf(stderr, "Can't setup output to port A\n");

    49     return 1;

    50   }

    51 

    52   value_a = 0x00;

    53   for (value_a = 0x00; value_a < 0xffff; ++value_a) {

    54     ioctl(file_handle, ME8100_WRITE_DO_A, &value_a);

    55     printf("Wrote %04x\n", value_a);

    56     sleep(3);

    57   }

    58 

    59   err = close(file_handle);

    60   if(err){

    61     printf("Kann Pfad nicht schliessen\n");

    62     return 1;

    63   }

    64 

    65   return 0;

    66 }

    67 /*

    68 	vim:sts=2 sw=2 aw ai sm:

    69 */