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130 ligi 1
#include "evdev_handler.h"
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int evdev_fd;
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int evdev_out_fd;
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int retval;
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size_t read_bytes;  /* how many bytes were read */
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struct input_event ev[64]; /* the events (up to 64 at once) */
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struct input_event led_event;
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int  *evdev_rel_axis=NULL;
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char *evdev_button=NULL;
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int counter;
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int connect_evdev(char* input_evdev_name)
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{
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  evdev_rel_axis = (int *) calloc( 100, sizeof( int ) );
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  evdev_button = (char *)calloc( 100, sizeof( char ) );
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  struct input_devinfo {
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    uint16_t bustype;
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    uint16_t vendor;
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    uint16_t product;
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    uint16_t version;
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  };
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  struct input_devinfo device_info;
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  if ((evdev_out_fd = open(input_evdev_name, O_WRONLY)) < 0)
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    {
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      printf(" cant open %s for writing\n",input_evdev_name);
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    }
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  if ((evdev_fd = open(input_evdev_name, O_RDONLY)) < 0)
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    {
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      printf(" cant open %s for reading!",input_evdev_name);
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      return 0;
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    }
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  ioctl(evdev_fd,EVIOCGID,&device_info);
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  printf("vendor 0x%04hx product 0x%04hx version 0x%04hx \n",
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         device_info.vendor, device_info.product,
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         device_info.version);
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  char name[256]= "Unknown";
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  if(ioctl(evdev_fd, EVIOCGNAME(sizeof(name)), name) < 0) {
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    perror("evdev ioctl");
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  }
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  printf("EVDEV reports name: %s\n", name);
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  /* this macro is used to tell if "bit" is set in "array"
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   * it selects a byte from the array, and does a boolean AND
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   * operation with a byte that only has the relevant bit set.
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   * eg. to check for the 12th bit, we do (array[1] & 1<<4)
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   */
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    uint8_t evtype_bitmask[EV_MAX/8 + 1];
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    if(ioctl(evdev_fd, EVIOCGBIT(0, sizeof(evtype_bitmask)), evtype_bitmask) < 0)
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      perror("evdev ioctl");
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     printf("Supported event types:\n");
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     int i;
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     for (i = 0; i < EV_MAX; i++) {
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       if (test_bit(i, evtype_bitmask)) {
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         /* this means that the bit is set in the event types list */
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         printf("  Event type 0x%02x ", i);
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         switch ( i)
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           {
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           case EV_KEY :
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             printf(" (Keys or Buttons)\n");
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             break;
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           case EV_ABS :
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             printf(" (Absolute Axes)\n");
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             break;
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           case EV_LED :
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             printf(" (LEDs)\n");
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             break;
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           case EV_REP :
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             printf(" (Repeat)\n");
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             break;
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           case EV_SYN :
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             printf(" (Sync?)\n");
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             break;
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           case EV_REL :
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             printf(" (Relative Axis)\n");
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             break;
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           case EV_MSC :
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             printf(" (Misc)\n");
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             break;
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           default:
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             printf(" (Unknown event type: 0x%04hx)\n", i);
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           }}}
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  return 1;
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}
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int init_evdevstatus_led()
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{
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  led_event.type=EV_LED;
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  led_event.code = LED_MISC;
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  led_event.value = 1;
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  if (evdev_out_fd)
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    retval = write(evdev_out_fd, &led_event, sizeof(struct input_event));
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  return 1;
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}
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int blink_evdev_led()
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{
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  if (evdev_out_fd)
120
    {
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      if (led_event.value)
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        led_event.value = 0;
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      else
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        led_event.value = 1 ;
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      retval = write(evdev_out_fd, &led_event, sizeof(struct input_event));
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    }
128
  return 1;
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}
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int poll_evdev()
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{
133
 
134
  struct timeval tv;
135
 
136
  fd_set rfds;
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  FD_ZERO(&rfds);
138
  FD_SET(evdev_fd,&rfds);
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140
  tv.tv_sec = 0;
141
  tv.tv_usec = 5;
142
 
143
  retval = select(evdev_fd+1, &rfds, NULL, NULL, &tv);
144
 
145
  if (retval==-1)
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    printf("error in select!!!!!!!!\n");
147
  else if (retval)
148
    {
149
      read_bytes = read(evdev_fd, ev, sizeof(struct input_event) * 64);
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151
      if (read_bytes < (int) sizeof(struct input_event)) {
152
        perror("evtest: short read");
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        exit (1);
154
      }
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156
      for (counter = 0; counter < (int) (read_bytes / sizeof(struct input_event)); counter++)
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        {
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159
          printf("%d type:%d code:%d val:%d \n",counter,ev[counter].type,ev[counter].code,ev[counter].value);
140 ligi 160
 
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          //      if (ev[counter].type==EV_REL) evdev_rel_axis[ ev[counter].code]= ev[counter].value;
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          // for logitech problem
130 ligi 163
          if (ev[counter].type==EV_REL) evdev_rel_axis[ ev[counter].code]= ev[counter].value;
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          if (ev[counter].type==EV_KEY) evdev_button[ ev[counter].code-256]= ev[counter].value;
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        }
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140 ligi 168
      for (counter=0;counter<20;counter++)
130 ligi 169
        printf("A%d %d -" , counter, evdev_rel_axis[counter] );
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      printf("\n");
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      for (counter=0;counter<10;counter++)
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        printf("B%d %d -" , counter, evdev_button[counter] );
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      //                printf("input read done: nick:%d roll:%d gier:%d gas:%d\n",axis[3] , axis[4] , axis[5] , axis[2]); 
175
    }
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  else
177
    printf("no data from evdev data from evdev: \n");
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179
  return 1;
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}