1 | #include <Wire.h>
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2 | #include <string.h>
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3 |
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4 | #undef int
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5 | #include <stdio.h>
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6 |
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7 | uint8_t outbuf[6]; // array to store arduino output
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8 | int cnt = 0;
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9 | int ledPin = 13;
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10 |
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11 | void
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12 | setup ()
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13 | {
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14 | beginSerial (19200); //----------------------------------------<<< Das hier scheint falsch zu sein
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15 | Serial.print ("Finished setup\n");
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16 | Wire.begin (); // join i2c bus with address 0x52
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17 | nunchuck_init (); // send the initilization handshake
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18 | }
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19 |
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20 | void
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21 | nunchuck_init ()
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22 | {
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23 | Wire.beginTransmission (0x52); // transmit to device 0x52
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24 | Wire.send (0x40); // sends memory address
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25 | Wire.send (0x00); // sends sent a zero.
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26 | Wire.endTransmission (); // stop transmitting
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27 | }
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28 |
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29 | void
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30 | send_zero ()
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31 | {
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32 | Wire.beginTransmission (0x52); // transmit to device 0x52
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33 | Wire.send (0x00); // sends one byte
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34 | Wire.endTransmission (); // stop transmitting
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35 | }
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36 |
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37 | void
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38 | loop ()
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39 | {
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40 | Wire.requestFrom (0x52, 6); // request data from nunchuck
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41 | while (Wire.available ())
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42 | {
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43 | outbuf[cnt] = nunchuk_decode_byte (Wire.receive ()); // receive byte as an integer
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44 | digitalWrite (ledPin, HIGH); // sets the LED on
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45 | cnt++;
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46 | }
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47 |
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48 | // If we recieved the 6 bytes, then go print them
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49 | if (cnt >= 5)
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50 | {
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51 | print ();
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52 | }
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53 |
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54 | cnt = 0;
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55 | send_zero (); // send the request for next bytes
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56 | delay (100);
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57 | }
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58 |
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59 | // Print the input data we have recieved
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60 | // accel data is 10 bits long
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61 | // so we read 8 bits, then we have to add
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62 | // on the last 2 bits. That is why I
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63 | // multiply them by 2 * 2
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64 | void
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65 | print ()
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66 | {
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67 | int joy_x_axis = outbuf[0];
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68 | int joy_y_axis = outbuf[1];
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69 | int accel_x_axis = outbuf[2] * 2 * 2;
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70 | int accel_y_axis = outbuf[3] * 2 * 2;
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71 | int accel_z_axis = outbuf[4] * 2 * 2;
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72 |
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73 | int z_button = 0;
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74 | int c_button = 0;
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75 |
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76 | // byte outbuf[5] contains bits for z and c buttons
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77 | // it also contains the least significant bits for the accelerometer data
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78 | // so we have to check each bit of byte outbuf[5]
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79 | if ((outbuf[5] >> 0) & 1)
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80 | {
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81 | z_button = 1;
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82 | }
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83 | if ((outbuf[5] >> 1) & 1)
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84 | {
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85 | c_button = 1;
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86 | }
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87 |
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88 | if ((outbuf[5] >> 2) & 1)
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89 | {
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90 | accel_x_axis += 2;
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91 | }
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92 | if ((outbuf[5] >> 3) & 1)
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93 | {
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94 | accel_x_axis += 1;
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95 | }
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96 |
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97 | if ((outbuf[5] >> 4) & 1)
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98 | {
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99 | accel_y_axis += 2;
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100 | }
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101 | if ((outbuf[5] >> 5) & 1)
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102 | {
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103 | accel_y_axis += 1;
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104 | }
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105 |
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106 | if ((outbuf[5] >> 6) & 1)
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107 | {
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108 | accel_z_axis += 2;
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109 | }
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110 | if ((outbuf[5] >> 7) & 1)
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111 | {
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112 | accel_z_axis += 1;
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113 | }
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114 |
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115 | Serial.print (joy_x_axis, DEC);
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116 | Serial.print ("\t");
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117 |
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118 | Serial.print (joy_y_axis, DEC);
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119 | Serial.print ("\t");
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120 |
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121 | Serial.print (accel_x_axis, DEC);
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122 | Serial.print ("\t");
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123 |
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124 | Serial.print (accel_y_axis, DEC);
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125 | Serial.print ("\t");
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126 |
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127 | Serial.print (accel_z_axis, DEC);
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128 | Serial.print ("\t");
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129 |
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130 | Serial.print (z_button, DEC);
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131 | Serial.print ("\t");
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132 |
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133 | Serial.print (c_button, DEC);
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134 | Serial.print ("\t");
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135 |
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136 | Serial.print ("\r\n");
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137 | }
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138 |
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139 | // Encode data to format that most wiimote drivers except
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140 | // only needed if you use one of the regular wiimote drivers
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141 | char
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142 | nunchuk_decode_byte (char x)
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143 | {
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144 | x = (x ^ 0x17) + 0x17;
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145 | return x;
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146 | }
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