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Rev | Author | Line No. | Line |
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130 | ligi | 1 | #include "evdev_handler.h" |
2 | |||
3 | int evdev_fd; |
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4 | int evdev_out_fd; |
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5 | int retval; |
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6 | size_t read_bytes; /* how many bytes were read */ |
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7 | struct input_event ev[64]; /* the events (up to 64 at once) */ |
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8 | struct input_event led_event; |
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9 | |||
10 | |||
11 | |||
12 | int *evdev_rel_axis=NULL; |
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13 | char *evdev_button=NULL; |
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14 | |||
15 | int counter; |
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16 | |||
17 | int connect_evdev(char* input_evdev_name) |
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18 | { |
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19 | evdev_rel_axis = (int *) calloc( 100, sizeof( int ) ); |
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20 | evdev_button = (char *)calloc( 100, sizeof( char ) ); |
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21 | |||
22 | struct input_devinfo { |
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23 | uint16_t bustype; |
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24 | uint16_t vendor; |
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25 | uint16_t product; |
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26 | uint16_t version; |
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27 | }; |
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28 | struct input_devinfo device_info; |
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29 | |||
30 | if ((evdev_out_fd = open(input_evdev_name, O_WRONLY)) < 0) |
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31 | { |
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32 | printf(" cant open %s for writing\n",input_evdev_name); |
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33 | |||
34 | } |
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35 | |||
36 | if ((evdev_fd = open(input_evdev_name, O_RDONLY)) < 0) |
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37 | { |
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38 | printf(" cant open %s for reading!",input_evdev_name); |
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39 | return 0; |
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40 | } |
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41 | |||
42 | ioctl(evdev_fd,EVIOCGID,&device_info); |
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43 | |||
44 | printf("vendor 0x%04hx product 0x%04hx version 0x%04hx \n", |
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45 | device_info.vendor, device_info.product, |
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46 | device_info.version); |
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47 | |||
48 | |||
49 | char name[256]= "Unknown"; |
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50 | |||
51 | if(ioctl(evdev_fd, EVIOCGNAME(sizeof(name)), name) < 0) { |
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52 | perror("evdev ioctl"); |
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53 | } |
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54 | |||
55 | printf("EVDEV reports name: %s\n", name); |
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56 | |||
57 | /* this macro is used to tell if "bit" is set in "array" |
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58 | * it selects a byte from the array, and does a boolean AND |
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59 | * operation with a byte that only has the relevant bit set. |
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60 | * eg. to check for the 12th bit, we do (array[1] & 1<<4) |
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61 | */ |
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62 | |||
63 | |||
64 | uint8_t evtype_bitmask[EV_MAX/8 + 1]; |
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65 | |||
66 | if(ioctl(evdev_fd, EVIOCGBIT(0, sizeof(evtype_bitmask)), evtype_bitmask) < 0) |
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67 | perror("evdev ioctl"); |
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68 | |||
69 | printf("Supported event types:\n"); |
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70 | |||
71 | int i; |
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72 | for (i = 0; i < EV_MAX; i++) { |
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73 | if (test_bit(i, evtype_bitmask)) { |
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74 | /* this means that the bit is set in the event types list */ |
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75 | printf(" Event type 0x%02x ", i); |
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76 | switch ( i) |
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77 | { |
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78 | case EV_KEY : |
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79 | printf(" (Keys or Buttons)\n"); |
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80 | break; |
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81 | case EV_ABS : |
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82 | printf(" (Absolute Axes)\n"); |
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83 | break; |
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84 | case EV_LED : |
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85 | printf(" (LEDs)\n"); |
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86 | break; |
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87 | case EV_REP : |
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88 | printf(" (Repeat)\n"); |
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89 | break; |
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90 | case EV_SYN : |
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91 | printf(" (Sync?)\n"); |
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92 | break; |
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93 | case EV_REL : |
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94 | printf(" (Relative Axis)\n"); |
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95 | break; |
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96 | case EV_MSC : |
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97 | printf(" (Misc)\n"); |
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98 | break; |
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99 | default: |
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100 | printf(" (Unknown event type: 0x%04hx)\n", i); |
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101 | }}} |
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102 | |||
103 | return 1; |
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104 | } |
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105 | |||
106 | int init_evdevstatus_led() |
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107 | { |
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108 | led_event.type=EV_LED; |
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109 | led_event.code = LED_MISC; |
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110 | led_event.value = 1; |
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111 | if (evdev_out_fd) |
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112 | retval = write(evdev_out_fd, &led_event, sizeof(struct input_event)); |
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113 | return 1; |
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114 | } |
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115 | |||
116 | int blink_evdev_led() |
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117 | { |
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118 | |||
119 | if (evdev_out_fd) |
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120 | { |
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121 | if (led_event.value) |
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122 | led_event.value = 0; |
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123 | else |
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124 | led_event.value = 1 ; |
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125 | |||
126 | retval = write(evdev_out_fd, &led_event, sizeof(struct input_event)); |
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127 | } |
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128 | return 1; |
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129 | } |
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130 | |||
131 | int poll_evdev() |
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132 | { |
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133 | |||
134 | struct timeval tv; |
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135 | |||
136 | fd_set rfds; |
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137 | FD_ZERO(&rfds); |
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138 | FD_SET(evdev_fd,&rfds); |
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139 | |||
140 | tv.tv_sec = 0; |
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141 | tv.tv_usec = 5; |
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142 | |||
143 | retval = select(evdev_fd+1, &rfds, NULL, NULL, &tv); |
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144 | |||
145 | if (retval==-1) |
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146 | printf("error in select!!!!!!!!\n"); |
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147 | else if (retval) |
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148 | { |
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149 | read_bytes = read(evdev_fd, ev, sizeof(struct input_event) * 64); |
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150 | |||
151 | if (read_bytes < (int) sizeof(struct input_event)) { |
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152 | perror("evtest: short read"); |
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153 | exit (1); |
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154 | } |
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155 | |||
156 | for (counter = 0; counter < (int) (read_bytes / sizeof(struct input_event)); counter++) |
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157 | { |
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158 | |||
159 | printf("%d type:%d code:%d val:%d \n",counter,ev[counter].type,ev[counter].code,ev[counter].value); |
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160 | if (ev[counter].type==EV_REL) evdev_rel_axis[ ev[counter].code]= ev[counter].value; |
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161 | if (ev[counter].type==EV_KEY) evdev_button[ ev[counter].code-256]= ev[counter].value; |
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162 | } |
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163 | |||
164 | |||
165 | for (counter=0;counter<10;counter++) |
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166 | printf("A%d %d -" , counter, evdev_rel_axis[counter] ); |
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167 | printf("\n"); |
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168 | |||
169 | for (counter=0;counter<10;counter++) |
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170 | printf("B%d %d -" , counter, evdev_button[counter] ); |
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171 | // printf("input read done: nick:%d roll:%d gier:%d gas:%d\n",axis[3] , axis[4] , axis[5] , axis[2]); |
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172 | } |
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173 | else |
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174 | printf("no data from evdev data from evdev: \n"); |
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175 | |||
176 | return 1; |
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177 | } |