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