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<li class="navelem"><a class="el" href="dir_74b6a3b63f61c160c0f14b7a283a4c9b.html">Firmware</a></li><li class="navelem"><a class="el" href="dir_8465ec698d237f801ae9966d4551fcfa.html">Chameleon-Mini</a></li><li class="navelem"><a class="el" href="dir_f5aab302412c0352d69464400cc5ee44.html">Codec</a></li> </ul>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/*</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * CODEC.h</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> *</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * Created on: 18.02.2013</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * Author: skuser</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> */</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> </div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="preprocessor">#ifndef CODEC_H_</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor">#define CODEC_H_</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> </div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor">#include <avr/io.h></span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#include <stdint.h></span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#include <stdbool.h></span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#include "../Common.h"</span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#include "../Configuration.h"</span></div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> </div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="preprocessor">#include "ISO14443-2A.h"</span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="preprocessor">#include "Reader14443-2A.h"</span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> </div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment">/* Timing definitions for ISO14443A */</span></div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#define ISO14443A_SUBCARRIER_DIVIDER 16</span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#define ISO14443A_BIT_GRID_CYCLES 128</span></div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#define ISO14443A_BIT_RATE_CYCLES 128</span></div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#define ISO14443A_FRAME_DELAY_PREV1 1236</span></div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#define ISO14443A_FRAME_DELAY_PREV0 1172</span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#define ISO14443A_RX_PENDING_TIMEOUT 1 // ms</span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> </div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment">/* Peripheral definitions */</span></div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#define CODEC_DEMOD_POWER_PORT PORTB</span></div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#define CODEC_DEMOD_POWER_MASK PIN0_bm</span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#define CODEC_DEMOD_IN_PORT PORTB</span></div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor">#define CODEC_DEMOD_IN_MASK (CODEC_DEMOD_IN_MASK0 | CODEC_DEMOD_IN_MASK1)</span></div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="preprocessor">#define CODEC_DEMOD_IN_MASK0 PIN1_bm</span></div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor">#define CODEC_DEMOD_IN_MASK1 PIN2_bm</span></div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="preprocessor">#define CODEC_DEMOD_IN_PINCTRL0 PIN1CTRL</span></div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="preprocessor">#define CODEC_DEMOD_IN_PINCTRL1 PIN2CTRL</span></div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="preprocessor">#define CODEC_DEMOD_IN_EVMUX0 EVSYS_CHMUX_PORTB_PIN1_gc</span></div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="preprocessor">#define CODEC_DEMOD_IN_EVMUX1 EVSYS_CHMUX_PORTB_PIN2_gc</span></div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="preprocessor">#define CODEC_DEMOD_IN_INT0_VECT PORTB_INT0_vect</span></div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="preprocessor">#define CODEC_LOADMOD_PORT PORTC</span></div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="preprocessor">#define CODEC_LOADMOD_MASK PIN6_bm</span></div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="preprocessor">#define CODEC_CARRIER_IN_PORT PORTC</span></div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="preprocessor">#define CODEC_CARRIER_IN_MASK PIN2_bm</span></div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="preprocessor">#define CODEC_CARRIER_IN_PINCTRL PIN2CTRL</span></div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="preprocessor">#define CODEC_CARRIER_IN_EVMUX EVSYS_CHMUX_PORTC_PIN2_gc</span></div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="preprocessor">#define CODEC_CARRIER_IN_DIV 2 </span><span class="comment">/* external clock division factor */</span><span class="preprocessor"></span></div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="preprocessor">#define CODEC_SUBCARRIER_PORT PORTC</span></div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="preprocessor">#define CODEC_SUBCARRIER_MASK_PSK PIN4_bm</span></div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="preprocessor">#define CODEC_SUBCARRIER_MASK_OOK PIN5_bm</span></div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="preprocessor">#define CODEC_SUBCARRIER_MASK (CODEC_SUBCARRIER_MASK_PSK | CODEC_SUBCARRIER_MASK_OOK)</span></div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="preprocessor">#define CODEC_SUBCARRIER_TIMER TCC1</span></div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="preprocessor">#define CODEC_SUBCARRIER_CC_PSK CCA</span></div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="preprocessor">#define CODEC_SUBCARRIER_CC_OOK CCB</span></div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="preprocessor">#define CODEC_SUBCARRIER_CCEN_PSK TC1_CCAEN_bm</span></div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="preprocessor">#define CODEC_SUBCARRIER_CCEN_OOK TC1_CCBEN_bm</span></div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="preprocessor">#define CODEC_TIMER_SAMPLING TCD0</span></div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="preprocessor">#define CODEC_TIMER_SAMPLING_CCA_VECT TCD0_CCA_vect</span></div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="preprocessor">#define CODEC_TIMER_SAMPLING_CCB_VECT TCD0_CCB_vect</span></div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="preprocessor">#define CODEC_TIMER_LOADMOD TCE0</span></div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="preprocessor">#define CODEC_TIMER_LOADMOD_OVF_VECT TCE0_OVF_vect</span></div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="preprocessor">#define CODEC_TIMER_LOADMOD_CCA_VECT TCE0_CCA_vect</span></div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="preprocessor">#define CODEC_TIMER_LOADMOD_CCB_VECT TCE0_CCB_vect</span></div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="preprocessor">#define CODEC_TIMER_LOADMOD_CCC_VECT TCE0_CCC_vect</span></div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="preprocessor">#define CODEC_TIMER_MODSTART_EVSEL TC_EVSEL_CH0_gc</span></div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="preprocessor">#define CODEC_TIMER_MODEND_EVSEL TC_EVSEL_CH1_gc</span></div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="preprocessor">#define CODEC_TIMER_CARRIER_CLKSEL TC_CLKSEL_EVCH6_gc</span></div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="preprocessor">#define CODEC_READER_TIMER TCC0</span></div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="preprocessor">#define CODEC_READER_PORT PORTC</span></div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="preprocessor">#define CODEC_READER_MASK_LEFT PIN0_bm</span></div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="preprocessor">#define CODEC_READER_MASK_RIGHT PIN1_bm</span></div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="preprocessor">#define CODEC_READER_MASK (CODEC_READER_MASK_LEFT | CODEC_READER_MASK_RIGHT)</span></div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="preprocessor">#define CODEC_READER_PINCTRL_LEFT PIN0CTRL</span></div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="preprocessor">#define CODEC_READER_PINCTRL_RIGHT PIN1CTRL</span></div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="preprocessor">#define CODEC_AC_DEMOD_SETTINGS AC_HSMODE_bm | AC_HYSMODE_NO_gc</span></div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="preprocessor">#define CODEC_MAXIMUM_THRESHOLD 0xFFF // the maximum voltage can be calculated with ch0data * Vref / 0xFFF</span></div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="preprocessor">#define CODEC_THRESHOLD_CALIBRATE_MIN 128</span></div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="preprocessor">#define CODEC_THRESHOLD_CALIBRATE_MAX 1024</span></div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="preprocessor">#define CODEC_THRESHOLD_CALIBRATE_STEPS 8</span></div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="preprocessor">#define CODEC_TIMER_TIMESTAMPS TCD1</span></div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="preprocessor">#define CODEC_TIMER_TIMESTAMPS_CCA_VECT TCD1_CCA_vect</span></div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span> </div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span> <span class="preprocessor">#define CODEC_BUFFER_SIZE 256</span></div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span> </div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="preprocessor">#define CODEC_CARRIER_FREQ 13560000</span></div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span> </div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="preprocessor">#define Codec8Reg0 GPIOR0</span></div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="preprocessor">#define Codec8Reg1 GPIOR1</span></div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span> <span class="preprocessor">#define Codec8Reg2 GPIOR2</span></div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="preprocessor">#define Codec8Reg3 GPIOR3</span></div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span> <span class="preprocessor">#define CodecCount16Register1 (*((volatile uint16_t*) &GPIOR4)) </span><span class="comment">/* GPIOR4 & GPIOR5 */</span><span class="preprocessor"></span></div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="preprocessor">#define CodecCount16Register2 (*((volatile uint16_t*) &GPIOR6)) </span><span class="comment">/* GPIOR4 & GPIOR5 */</span><span class="preprocessor"></span></div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="preprocessor">#define CodecPtrRegister1 (*((volatile uint8_t**) &GPIOR8))</span></div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span> <span class="preprocessor">#define CodecPtrRegister2 (*((volatile uint8_t**) &GPIORA))</span></div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span> </div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span> <span class="keyword">extern</span> uint16_t ReaderThreshold;</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span> <span class="keyword">extern</span> uint16_t Reader_FWT;</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span> </div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="preprocessor">#define FWI2FWT(x) ((uint32_t)(256 * 16 * ((uint32_t)1 << (x))) / (CODEC_CARRIER_FREQ / 1000) + 1)</span></div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span> </div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="keyword">typedef</span> <span class="keyword">enum</span> {</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  CODEC_SUBCARRIERMOD_OFF,</div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  CODEC_SUBCARRIERMOD_OOK</div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span> } SubcarrierModType;</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span> </div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span> <span class="keyword">extern</span> uint8_t CodecBuffer[CODEC_BUFFER_SIZE];</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span> </div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span> INLINE <span class="keywordtype">void</span> CodecInit(<span class="keywordtype">void</span>) {</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  ActiveConfiguration.<a class="code" href="struct_configuration_type.html#a2e62a9c3c9361a09c94505dff5820a9b">CodecInitFunc</a>();</div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span> }</div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span> </div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span> INLINE <span class="keywordtype">void</span> CodecDeInit(<span class="keywordtype">void</span>) {</div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  ActiveConfiguration.<a class="code" href="struct_configuration_type.html#a2b3fe0c8c0643102a8f07157fa0265f7">CodecDeInitFunc</a>();</div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span> }</div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span> </div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span> INLINE <span class="keywordtype">void</span> CodecTask(<span class="keywordtype">void</span>) {</div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  ActiveConfiguration.<a class="code" href="struct_configuration_type.html#afcabcce06f07798a43b95d0cf4d05db2">CodecTaskFunc</a>();</div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span> }</div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span> </div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span> <span class="comment">/* Helper Functions for Codec implementations */</span></div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span> INLINE <span class="keywordtype">void</span> CodecInitCommon(<span class="keywordtype">void</span>)</div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span> {</div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <span class="comment">/* Configure CARRIER input pin and route it to EVSYS.</span></div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span> <span class="comment"> * Multiply by 2 again by using both edges when externally</span></div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span> <span class="comment"> * dividing by 2 */</span></div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span> <span class="preprocessor">#if CODEC_CARRIER_IN_DIV == 2</span></div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  CODEC_CARRIER_IN_PORT.CODEC_CARRIER_IN_PINCTRL = PORT_ISC_BOTHEDGES_gc;</div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span> <span class="preprocessor">#error Option not supported</span></div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  CODEC_CARRIER_IN_PORT.DIRCLR = CODEC_CARRIER_IN_MASK;</div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  EVSYS.CH6MUX = CODEC_CARRIER_IN_EVMUX;</div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span> </div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <span class="comment">/* Configure two DEMOD pins for input.</span></div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span> <span class="comment"> * Configure event channel 0 for rising edge (begin of modulation pause)</span></div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span> <span class="comment"> * Configure event channel 1 for falling edge (end of modulation pause) */</span></div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  CODEC_DEMOD_POWER_PORT.OUTCLR = CODEC_DEMOD_POWER_MASK;</div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  CODEC_DEMOD_POWER_PORT.DIRSET = CODEC_DEMOD_POWER_MASK;</div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  CODEC_DEMOD_IN_PORT.DIRCLR = CODEC_DEMOD_IN_MASK;</div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  CODEC_DEMOD_IN_PORT.CODEC_DEMOD_IN_PINCTRL0 = PORT_ISC_RISING_gc;</div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  CODEC_DEMOD_IN_PORT.CODEC_DEMOD_IN_PINCTRL1 = PORT_ISC_FALLING_gc;</div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  CODEC_DEMOD_IN_PORT.INT0MASK = 0;</div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  CODEC_DEMOD_IN_PORT.INTCTRL = PORT_INT0LVL_HI_gc;</div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  EVSYS.CH0MUX = CODEC_DEMOD_IN_EVMUX0;</div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  EVSYS.CH1MUX = CODEC_DEMOD_IN_EVMUX1;</div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span> </div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  <span class="comment">/* Configure loadmod pin configuration and use a virtual port configuration</span></div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span> <span class="comment"> * for single instruction cycle access */</span></div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  CODEC_LOADMOD_PORT.DIRSET = CODEC_LOADMOD_MASK;</div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  CODEC_LOADMOD_PORT.OUTCLR = CODEC_LOADMOD_MASK;</div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  PORTCFG.VPCTRLA &= ~PORTCFG_VP0MAP_gm;</div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  PORTCFG.VPCTRLA |= PORTCFG_VP02MAP_PORTC_gc;</div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span> </div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  <span class="comment">/* Configure subcarrier pins for output */</span></div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  CODEC_SUBCARRIER_PORT.DIRSET = CODEC_SUBCARRIER_MASK;</div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  CODEC_SUBCARRIER_PORT.OUTCLR = CODEC_SUBCARRIER_MASK;</div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span> </div><div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  <span class="comment">/* Configure pins for reader field with the LEFT output being inverted</span></div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span> <span class="comment"> * and all bridge outputs static high */</span></div><div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  CODEC_READER_PORT.CODEC_READER_PINCTRL_LEFT = PORT_INVEN_bm;</div><div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  CODEC_READER_PORT.OUTCLR = CODEC_READER_MASK_LEFT;</div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  CODEC_READER_PORT.OUTSET = CODEC_READER_MASK_RIGHT;</div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  CODEC_READER_PORT.DIRSET = CODEC_READER_MASK;</div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span> </div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <span class="comment">/* Configure timer for generating reader field and configure AWEX for outputting pattern</span></div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span> <span class="comment"> * with disabled outputs. */</span></div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  CODEC_READER_TIMER.CTRLB = TC0_CCAEN_bm | TC_WGMODE_SINGLESLOPE_gc;</div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  CODEC_READER_TIMER.PER = F_CPU / CODEC_CARRIER_FREQ - 1;</div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  CODEC_READER_TIMER.CCA = F_CPU / CODEC_CARRIER_FREQ / 2 ;</div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span> </div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  AWEXC.OUTOVEN = 0x00;</div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  AWEXC.CTRL = AWEX_CWCM_bm | AWEX_DTICCAEN_bm | AWEX_DTICCBEN_bm;</div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span> </div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  <span class="comment">/* Configure DAC for the reference voltage */</span></div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  DACB.EVCTRL = 0;</div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  DACB.CTRLB = DAC_CHSEL_SINGLE_gc;</div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  DACB.CTRLC = DAC_REFSEL_AVCC_gc;</div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  DACB.CTRLA = DAC_IDOEN_bm | DAC_ENABLE_bm;</div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  DACB.CH0DATA = ReaderThreshold; <span class="comment">// real threshold voltage can be calculated with ch0data * Vref / 0xFFF</span></div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span> </div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  <span class="comment">/* Configure Analog Comparator 0 to detect changes in demodulated reader field */</span></div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  ACA.AC0MUXCTRL = AC_MUXPOS_DAC_gc | AC_MUXNEG_PIN7_gc;</div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  ACA.AC0CTRL = CODEC_AC_DEMOD_SETTINGS;</div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span> </div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  <span class="comment">/* Configure Analog Comparator 1 to detect SOC */</span></div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  ACA.AC1MUXCTRL = AC_MUXPOS_DAC_gc | AC_MUXNEG_PIN7_gc;</div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  ACA.AC1CTRL = CODEC_AC_DEMOD_SETTINGS;</div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span> }</div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span> </div><div class="line"><a name="l00189"></a><span class="lineno"> 189</span> INLINE <span class="keywordtype">void</span> CodecSetSubcarrier(SubcarrierModType ModType, uint16_t Divider)</div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span> {</div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  <span class="keywordflow">if</span> (ModType == CODEC_SUBCARRIERMOD_OFF) {</div><div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  CODEC_SUBCARRIER_TIMER.CTRLA = TC_CLKSEL_OFF_gc;</div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  CODEC_SUBCARRIER_TIMER.CTRLB = 0;</div><div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (ModType == CODEC_SUBCARRIERMOD_OOK) {</div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  <span class="comment">/* Configure subcarrier generation with 50% DC output using OOK */</span></div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  CODEC_SUBCARRIER_TIMER.CNT = 0;</div><div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  CODEC_SUBCARRIER_TIMER.PER = Divider - 1;</div><div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  CODEC_SUBCARRIER_TIMER.CODEC_SUBCARRIER_CC_OOK = Divider/2;</div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  CODEC_SUBCARRIER_TIMER.CTRLB = CODEC_SUBCARRIER_CCEN_OOK | TC_WGMODE_SINGLESLOPE_gc;</div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  }</div><div class="line"><a name="l00201"></a><span class="lineno"> 201</span> }</div><div class="line"><a name="l00202"></a><span class="lineno"> 202</span> </div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span> INLINE <span class="keywordtype">void</span> CodecStartSubcarrier(<span class="keywordtype">void</span>)</div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span> {</div><div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  CODEC_SUBCARRIER_TIMER.CTRLA = CODEC_TIMER_CARRIER_CLKSEL;</div><div class="line"><a name="l00206"></a><span class="lineno"> 206</span> }</div><div class="line"><a name="l00207"></a><span class="lineno"> 207</span> </div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span> INLINE <span class="keywordtype">void</span> CodecSetDemodPower(<span class="keywordtype">bool</span> bOnOff)</div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span> {</div><div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  <span class="keywordflow">if</span> (bOnOff) {</div><div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  CODEC_DEMOD_POWER_PORT.OUTSET = CODEC_DEMOD_POWER_MASK;</div><div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  CODEC_DEMOD_POWER_PORT.OUTCLR = CODEC_DEMOD_POWER_MASK;</div><div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  }</div><div class="line"><a name="l00215"></a><span class="lineno"> 215</span> }</div><div class="line"><a name="l00216"></a><span class="lineno"> 216</span> </div><div class="line"><a name="l00217"></a><span class="lineno"> 217</span> INLINE <span class="keywordtype">bool</span> CodecGetLoadmodState(<span class="keywordtype">void</span>) {</div><div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  <span class="keywordflow">if</span> (ACA.STATUS & AC_AC0STATE_bm) {</div><div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  }</div><div class="line"><a name="l00223"></a><span class="lineno"> 223</span> }</div><div class="line"><a name="l00224"></a><span class="lineno"> 224</span> </div><div class="line"><a name="l00225"></a><span class="lineno"> 225</span> INLINE <span class="keywordtype">void</span> CodecSetLoadmodState(<span class="keywordtype">bool</span> bOnOff) {</div><div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  <span class="keywordflow">if</span> (bOnOff) {</div><div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  VPORT0.OUT |= CODEC_LOADMOD_MASK;</div><div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  VPORT0.OUT &= ~CODEC_LOADMOD_MASK;</div><div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  }</div><div class="line"><a name="l00231"></a><span class="lineno"> 231</span> }</div><div class="line"><a name="l00232"></a><span class="lineno"> 232</span> </div><div class="line"><a name="l00233"></a><span class="lineno"> 233</span> INLINE <span class="keywordtype">void</span> CodecSetReaderField(<span class="keywordtype">bool</span> bOnOff) { <span class="comment">// this is the function for turning on/off the reader field dumbly; before using this function, please consider to use CodecReaderField{Start,Stop}</span></div><div class="line"><a name="l00234"></a><span class="lineno"> 234</span> </div><div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  <span class="keywordflow">if</span> (bOnOff) {</div><div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  <span class="comment">/* Start timer for field generation and unmask outputs */</span></div><div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  CODEC_READER_TIMER.CTRLA = TC_CLKSEL_DIV1_gc;</div><div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  AWEXC.OUTOVEN = CODEC_READER_MASK;</div><div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  <span class="comment">/* Disable outputs of AWEX and stop field generation */</span></div><div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  AWEXC.OUTOVEN = 0x00;</div><div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  CODEC_READER_TIMER.CTRLA = TC_CLKSEL_OFF_gc;</div><div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  }</div><div class="line"><a name="l00244"></a><span class="lineno"> 244</span> }</div><div class="line"><a name="l00245"></a><span class="lineno"> 245</span> </div><div class="line"><a name="l00246"></a><span class="lineno"> 246</span> INLINE <span class="keywordtype">bool</span> CodecGetReaderField(<span class="keywordtype">void</span>) {</div><div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  <span class="keywordflow">return</span> (CODEC_READER_TIMER.CTRLA == TC_CLKSEL_DIV1_gc) && (AWEXC.OUTOVEN == CODEC_READER_MASK);</div><div class="line"><a name="l00248"></a><span class="lineno"> 248</span> }</div><div class="line"><a name="l00249"></a><span class="lineno"> 249</span> </div><div class="line"><a name="l00250"></a><span class="lineno"> 250</span> <span class="keywordtype">void</span> CodecReaderFieldStart(<span class="keywordtype">void</span>);</div><div class="line"><a name="l00251"></a><span class="lineno"> 251</span> <span class="keywordtype">void</span> CodecReaderFieldStop(<span class="keywordtype">void</span>);</div><div class="line"><a name="l00252"></a><span class="lineno"> 252</span> <span class="keywordtype">bool</span> CodecIsReaderFieldReady(<span class="keywordtype">void</span>);</div><div class="line"><a name="l00253"></a><span class="lineno"> 253</span> </div><div class="line"><a name="l00254"></a><span class="lineno"> 254</span> <span class="keywordtype">void</span> CodecReaderFieldRestart(uint16_t delay);</div><div class="line"><a name="l00255"></a><span class="lineno"> 255</span> <span class="preprocessor">#define FIELD_RESTART() CodecReaderFieldRestart(100)</span></div><div class="line"><a name="l00256"></a><span class="lineno"> 256</span> <span class="keywordtype">bool</span> CodecIsReaderToBeRestarted(<span class="keywordtype">void</span>);</div><div class="line"><a name="l00257"></a><span class="lineno"> 257</span> </div><div class="line"><a name="l00258"></a><span class="lineno"> 258</span> <span class="keywordtype">void</span> CodecThresholdSet(uint16_t th);</div><div class="line"><a name="l00259"></a><span class="lineno"> 259</span> uint16_t CodecThresholdIncrement(<span class="keywordtype">void</span>);</div><div class="line"><a name="l00260"></a><span class="lineno"> 260</span> <span class="keywordtype">void</span> CodecThresholdReset(<span class="keywordtype">void</span>);</div><div class="line"><a name="l00261"></a><span class="lineno"> 261</span> <span class="preprocessor">#endif </span><span class="comment">/* CODEC_H_ */</span><span class="preprocessor"></span></div><div class="ttc" id="struct_configuration_type_html_a2e62a9c3c9361a09c94505dff5820a9b"><div class="ttname"><a href="struct_configuration_type.html#a2e62a9c3c9361a09c94505dff5820a9b">ConfigurationType::CodecInitFunc</a></div><div class="ttdeci">void(* CodecInitFunc)(void)</div><div class="ttdef"><b>Definition:</b> Configuration.h:59</div></div>
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<div class="ttc" id="struct_configuration_type_html_afcabcce06f07798a43b95d0cf4d05db2"><div class="ttname"><a href="struct_configuration_type.html#afcabcce06f07798a43b95d0cf4d05db2">ConfigurationType::CodecTaskFunc</a></div><div class="ttdeci">void(* CodecTaskFunc)(void)</div><div class="ttdef"><b>Definition:</b> Configuration.h:65</div></div>
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<div class="ttc" id="struct_configuration_type_html_a2b3fe0c8c0643102a8f07157fa0265f7"><div class="ttname"><a href="struct_configuration_type.html#a2b3fe0c8c0643102a8f07157fa0265f7">ConfigurationType::CodecDeInitFunc</a></div><div class="ttdeci">void(* CodecDeInitFunc)(void)</div><div class="ttdef"><b>Definition:</b> Configuration.h:61</div></div>
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