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<div class="title">fastspi_bitbang.h</div> </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="preprocessor">#ifndef __INC_FASTSPI_BITBANG_H</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="preprocessor">#define __INC_FASTSPI_BITBANG_H</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> </div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="preprocessor">#include "fastled_delay.h"</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> </div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> FASTLED_NAMESPACE_BEGIN</div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> </div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">//</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment">// Software SPI (aka bit-banging) support - with aggressive optimizations for when the clock and data pin are on the same port</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment">//</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment">// TODO: Replace the select pin definition with a set of pins, to allow using mux hardware for routing in the future</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment">//</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"></span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="keyword">template</span> <u<span class="keywordtype">int</span>8_t DATA_PIN, u<span class="keywordtype">int</span>8_t CLOCK_PIN, u<span class="keywordtype">int</span>8_t SPI_SPEED></div>
<div class="line"><a name="l00017"></a><span class="lineno"><a class="line" href="class_a_v_r_software_s_p_i_output.html"> 17</a></span> <span class="keyword">class </span><a class="code" href="class_a_v_r_software_s_p_i_output.html">AVRSoftwareSPIOutput</a> {</div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>  <span class="comment">// The data types for pointers to the pin port - typedef'd here from the Pin definition because on avr these</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>  <span class="comment">// are pointers to 8 bit values, while on arm they are 32 bit</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>  <span class="keyword">typedef</span> <span class="keyword">typename</span> FastPin<DATA_PIN>::port_ptr_t data_ptr_t;</div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>  <span class="keyword">typedef</span> <span class="keyword">typename</span> <a class="code" href="class_fast_pin.html">FastPin<CLOCK_PIN>::port_ptr_t</a> clock_ptr_t;</div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> </div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  <span class="comment">// The data type for what's at a pin's port - typedef'd here from the Pin definition because on avr the ports</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>  <span class="comment">// are 8 bits wide while on arm they are 32.</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  <span class="keyword">typedef</span> <span class="keyword">typename</span> FastPin<DATA_PIN>::port_t data_t;</div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  <span class="keyword">typedef</span> <span class="keyword">typename</span> <a class="code" href="class_fast_pin.html">FastPin<CLOCK_PIN>::port_t</a> clock_t;</div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  <a class="code" href="class_selectable.html">Selectable</a> *m_pSelect;</div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> </div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="keyword">public</span>:</div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  <a class="code" href="class_a_v_r_software_s_p_i_output.html">AVRSoftwareSPIOutput</a>() { m_pSelect = NULL; }</div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  <a class="code" href="class_a_v_r_software_s_p_i_output.html">AVRSoftwareSPIOutput</a>(<a class="code" href="class_selectable.html">Selectable</a> *pSelect) { m_pSelect = pSelect; }</div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  <span class="keywordtype">void</span> setSelect(<a class="code" href="class_selectable.html">Selectable</a> *pSelect) { m_pSelect = pSelect; }</div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> </div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  <span class="keywordtype">void</span> init() {</div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  <span class="comment">// set the pins to output and make sure the select is released (which apparently means hi? This is a bit</span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  <span class="comment">// confusing to me)</span></div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <a class="code" href="class_fast_pin.html">FastPin<DATA_PIN>::setOutput</a>();</div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  <a class="code" href="class_fast_pin.html">FastPin<CLOCK_PIN>::setOutput</a>();</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  release();</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  }</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> </div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  <span class="comment">// stop the SPI output. Pretty much a NOP with software, as there's no registers to kick</span></div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="keyword">static</span> <span class="keywordtype">void</span> stop() { }</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> </div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="comment">// wait until the SPI subsystem is ready for more data to write. A NOP when bitbanging</span></div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="keyword">static</span> <span class="keywordtype">void</span> wait() __attribute__((always_inline)) { }</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="keyword">static</span> <span class="keywordtype">void</span> waitFully() __attribute__((always_inline)) { wait(); }</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> </div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <span class="keyword">static</span> <span class="keywordtype">void</span> writeByteNoWait(uint8_t b) __attribute__((always_inline)) { writeByte(b); }</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keyword">static</span> <span class="keywordtype">void</span> writeBytePostWait(uint8_t b) __attribute__((always_inline)) { writeByte(b); wait(); }</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> </div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <span class="keyword">static</span> <span class="keywordtype">void</span> writeWord(uint16_t w) __attribute__((always_inline)) { writeByte(w>>8); writeByte(w&0xFF); }</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> </div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="comment">// naive writeByte implelentation, simply calls writeBit on the 8 bits in the byte.</span></div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keyword">static</span> <span class="keywordtype">void</span> writeByte(uint8_t b) {</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  writeBit<7>(b);</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  writeBit<6>(b);</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  writeBit<5>(b);</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  writeBit<4>(b);</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  writeBit<3>(b);</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  writeBit<2>(b);</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  writeBit<1>(b);</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  writeBit<0>(b);</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  }</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> </div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="keyword">private</span>:</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="comment">// writeByte implementation with data/clock registers passed in.</span></div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <span class="keyword">static</span> <span class="keywordtype">void</span> writeByte(uint8_t b, clock_ptr_t clockpin, data_ptr_t datapin) {</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  writeBit<7>(b, clockpin, datapin);</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  writeBit<6>(b, clockpin, datapin);</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  writeBit<5>(b, clockpin, datapin);</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  writeBit<4>(b, clockpin, datapin);</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  writeBit<3>(b, clockpin, datapin);</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  writeBit<2>(b, clockpin, datapin);</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  writeBit<1>(b, clockpin, datapin);</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  writeBit<0>(b, clockpin, datapin);</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  }</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span> </div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="comment">// writeByte implementation with the data register passed in and prebaked values for data hi w/clock hi and</span></div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="comment">// low and data lo w/clock hi and lo. This is to be used when clock and data are on the same GPIO register,</span></div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="comment">// can get close to getting a bit out the door in 2 clock cycles!</span></div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="keyword">static</span> <span class="keywordtype">void</span> writeByte(uint8_t b, data_ptr_t datapin,</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  data_t hival, data_t loval,</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  clock_t hiclock, clock_t loclock) {</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  writeBit<7>(b, datapin, hival, loval, hiclock, loclock);</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  writeBit<6>(b, datapin, hival, loval, hiclock, loclock);</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  writeBit<5>(b, datapin, hival, loval, hiclock, loclock);</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  writeBit<4>(b, datapin, hival, loval, hiclock, loclock);</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  writeBit<3>(b, datapin, hival, loval, hiclock, loclock);</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  writeBit<2>(b, datapin, hival, loval, hiclock, loclock);</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  writeBit<1>(b, datapin, hival, loval, hiclock, loclock);</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  writeBit<0>(b, datapin, hival, loval, hiclock, loclock);</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</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="comment">// writeByte implementation with not just registers passed in, but pre-baked values for said registers for</span></div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="comment">// data hi/lo and clock hi/lo values. Note: weird things will happen if this method is called in cases where</span></div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="comment">// the data and clock pins are on the same port! Don't do that!</span></div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <span class="keyword">static</span> <span class="keywordtype">void</span> writeByte(uint8_t b, clock_ptr_t clockpin, data_ptr_t datapin,</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  data_t hival, data_t loval,</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  clock_t hiclock, clock_t loclock) {</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  writeBit<7>(b, clockpin, datapin, hival, loval, hiclock, loclock);</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  writeBit<6>(b, clockpin, datapin, hival, loval, hiclock, loclock);</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  writeBit<5>(b, clockpin, datapin, hival, loval, hiclock, loclock);</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  writeBit<4>(b, clockpin, datapin, hival, loval, hiclock, loclock);</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  writeBit<3>(b, clockpin, datapin, hival, loval, hiclock, loclock);</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  writeBit<2>(b, clockpin, datapin, hival, loval, hiclock, loclock);</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  writeBit<1>(b, clockpin, datapin, hival, loval, hiclock, loclock);</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  writeBit<0>(b, clockpin, datapin, hival, loval, hiclock, loclock);</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> <span class="keyword">public</span>:</div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span> <span class="preprocessor"> #define SPI_DELAY delaycycles<1+((SPI_SPEED-2) / 2)>();</span></div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span> <span class="preprocessor"> #define SPI_DELAY_HALF delaycycles<1+ ((SPI_SPEED-4) / 4)>();</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>  <span class="comment">// write the BIT'th bit out via spi, setting the data pin then strobing the clcok</span></div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  <span class="keyword">template</span> <u<span class="keywordtype">int</span>8_t BIT> __attribute__((always_inline, hot)) <span class="keyword">inline</span> <span class="keyword">static</span> <span class="keywordtype">void</span> writeBit(uint8_t b) {</div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <span class="keywordflow">if</span>(b & (1 << BIT)) {</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <a class="code" href="class_fast_pin.html">FastPin<DATA_PIN>::hi</a>();</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <a class="code" href="class_fast_pin.html">FastPin<CLOCK_PIN>::hi</a>(); SPI_DELAY;</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <a class="code" href="class_fast_pin.html">FastPin<CLOCK_PIN>::lo</a>(); SPI_DELAY;</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <a class="code" href="class_fast_pin.html">FastPin<DATA_PIN>::lo</a>();</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <a class="code" href="class_fast_pin.html">FastPin<CLOCK_PIN>::hi</a>(); SPI_DELAY;</div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  <a class="code" href="class_fast_pin.html">FastPin<CLOCK_PIN>::lo</a>(); SPI_DELAY;</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  }</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  }</div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span> </div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span> <span class="keyword">private</span>:</div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  <span class="comment">// write the BIT'th bit out via spi, setting the data pin then strobing the clock, using the passed in pin registers to accelerate access if needed</span></div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  <span class="keyword">template</span> <u<span class="keywordtype">int</span>8_t BIT> __attribute__((always_inline)) <span class="keyword">inline</span> <span class="keyword">static</span> <span class="keywordtype">void</span> writeBit(uint8_t b, clock_ptr_t clockpin, data_ptr_t datapin) {</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="keywordflow">if</span>(b & (1 << BIT)) {</div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  <a class="code" href="class_fast_pin.html">FastPin<DATA_PIN>::hi</a>(datapin);</div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <a class="code" href="class_fast_pin.html">FastPin<CLOCK_PIN>::hi</a>(clockpin); SPI_DELAY;</div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <a class="code" href="class_fast_pin.html">FastPin<CLOCK_PIN>::lo</a>(clockpin); SPI_DELAY;</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <a class="code" href="class_fast_pin.html">FastPin<DATA_PIN>::lo</a>(datapin);</div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  <a class="code" href="class_fast_pin.html">FastPin<CLOCK_PIN>::hi</a>(clockpin); SPI_DELAY;</div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <a class="code" href="class_fast_pin.html">FastPin<CLOCK_PIN>::lo</a>(clockpin); SPI_DELAY;</div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  }</div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span> </div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  }</div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span> </div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <span class="comment">// the version of write to use when clock and data are on separate pins with precomputed values for setting</span></div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  <span class="comment">// the clock and data pins</span></div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  <span class="keyword">template</span> <u<span class="keywordtype">int</span>8_t BIT> __attribute__((always_inline)) <span class="keyword">inline</span> <span class="keyword">static</span> <span class="keywordtype">void</span> writeBit(uint8_t b, clock_ptr_t clockpin, data_ptr_t datapin,</div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  data_t hival, data_t loval, clock_t hiclock, clock_t loclock) {</div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  <span class="comment">// // only need to explicitly set clock hi if clock and data are on different ports</span></div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  <span class="keywordflow">if</span>(b & (1 << BIT)) {</div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  <a class="code" href="class_fast_pin.html">FastPin<DATA_PIN>::fastset</a>(datapin, hival);</div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  <a class="code" href="class_fast_pin.html">FastPin<CLOCK_PIN>::fastset</a>(clockpin, hiclock); SPI_DELAY;</div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <a class="code" href="class_fast_pin.html">FastPin<CLOCK_PIN>::fastset</a>(clockpin, loclock); SPI_DELAY;</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  <span class="comment">// NOP;</span></div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  <a class="code" href="class_fast_pin.html">FastPin<DATA_PIN>::fastset</a>(datapin, loval);</div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <a class="code" href="class_fast_pin.html">FastPin<CLOCK_PIN>::fastset</a>(clockpin, hiclock); SPI_DELAY;</div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  <a class="code" href="class_fast_pin.html">FastPin<CLOCK_PIN>::fastset</a>(clockpin, loclock); SPI_DELAY;</div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  }</div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  }</div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span> </div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  <span class="comment">// the version of write to use when clock and data are on the same port with precomputed values for the various</span></div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  <span class="comment">// combinations</span></div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  <span class="keyword">template</span> <u<span class="keywordtype">int</span>8_t BIT> __attribute__((always_inline)) <span class="keyword">inline</span> <span class="keyword">static</span> <span class="keywordtype">void</span> writeBit(uint8_t b, data_ptr_t clockdatapin,</div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  data_t datahiclockhi, data_t dataloclockhi,</div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  data_t datahiclocklo, data_t dataloclocklo) {</div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span> <span class="preprocessor">#if 0</span></div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  writeBit<BIT>(b);</div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span> <span class="preprocessor">#else</span></div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  <span class="keywordflow">if</span>(b & (1 << BIT)) {</div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  <a class="code" href="class_fast_pin.html">FastPin<DATA_PIN>::fastset</a>(clockdatapin, datahiclocklo); SPI_DELAY_HALF;</div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  <a class="code" href="class_fast_pin.html">FastPin<DATA_PIN>::fastset</a>(clockdatapin, datahiclockhi); SPI_DELAY;</div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  <a class="code" href="class_fast_pin.html">FastPin<DATA_PIN>::fastset</a>(clockdatapin, datahiclocklo); SPI_DELAY_HALF;</div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  <span class="comment">// NOP;</span></div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  <a class="code" href="class_fast_pin.html">FastPin<DATA_PIN>::fastset</a>(clockdatapin, dataloclocklo); SPI_DELAY_HALF;</div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  <a class="code" href="class_fast_pin.html">FastPin<DATA_PIN>::fastset</a>(clockdatapin, dataloclockhi); SPI_DELAY;</div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  <a class="code" href="class_fast_pin.html">FastPin<DATA_PIN>::fastset</a>(clockdatapin, dataloclocklo); SPI_DELAY_HALF;</div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  }</div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span> <span class="preprocessor">#endif</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="keyword">public</span>:</div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span> </div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  <span class="comment">// select the SPI output (TODO: research whether this really means hi or lo. Alt TODO: move select responsibility out of the SPI classes</span></div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  <span class="comment">// entirely, make it up to the caller to remember to lock/select the line?)</span></div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  <span class="keywordtype">void</span> select() { <span class="keywordflow">if</span>(m_pSelect != NULL) { m_pSelect->select(); } } <span class="comment">// FastPin<SELECT_PIN>::hi(); }</span></div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span> </div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  <span class="comment">// release the SPI line</span></div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  <span class="keywordtype">void</span> release() { <span class="keywordflow">if</span>(m_pSelect != NULL) { m_pSelect->release(); } } <span class="comment">// FastPin<SELECT_PIN>::lo(); }</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>  <span class="comment">// Write out len bytes of the given value out over SPI. Useful for quickly flushing, say, a line of 0's down the line.</span></div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  <span class="keywordtype">void</span> writeBytesValue(uint8_t value, <span class="keywordtype">int</span> len) {</div>
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  select();</div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  writeBytesValueRaw(value, len);</div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  release();</div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  }</div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span> </div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  <span class="keyword">static</span> <span class="keywordtype">void</span> writeBytesValueRaw(uint8_t value, <span class="keywordtype">int</span> len) {</div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span> <span class="preprocessor">#ifdef FAST_SPI_INTERRUPTS_WRITE_PINS</span></div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  <span class="comment">// TODO: Weird things may happen if software bitbanging SPI output and other pins on the output reigsters are being twiddled. Need</span></div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  <span class="comment">// to allow specifying whether or not exclusive i/o access is allowed during this process, and if i/o access is not allowed fall</span></div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  <span class="comment">// back to the degenerative code below</span></div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  <span class="keywordflow">while</span>(len--) {</div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  writeByte(value);</div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  }</div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span> <span class="preprocessor">#else</span></div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  <span class="keyword">register</span> data_ptr_t datapin = <a class="code" href="class_fast_pin.html">FastPin<DATA_PIN>::port</a>();</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>  <span class="keywordflow">if</span>(<a class="code" href="class_fast_pin.html">FastPin<DATA_PIN>::port</a>() != <a class="code" href="class_fast_pin.html">FastPin<CLOCK_PIN>::port</a>()) {</div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  <span class="comment">// If data and clock are on different ports, then writing a bit will consist of writing the value foor</span></div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  <span class="comment">// the bit (hi or low) to the data pin port, and then two writes to the clock port to strobe the clock line</span></div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  <span class="keyword">register</span> clock_ptr_t clockpin = <a class="code" href="class_fast_pin.html">FastPin<CLOCK_PIN>::port</a>();</div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  <span class="keyword">register</span> data_t datahi = <a class="code" href="class_fast_pin.html">FastPin<DATA_PIN>::hival</a>();</div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  <span class="keyword">register</span> data_t datalo = <a class="code" href="class_fast_pin.html">FastPin<DATA_PIN>::loval</a>();</div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  <span class="keyword">register</span> clock_t clockhi = <a class="code" href="class_fast_pin.html">FastPin<CLOCK_PIN>::hival</a>();</div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  <span class="keyword">register</span> clock_t clocklo = <a class="code" href="class_fast_pin.html">FastPin<CLOCK_PIN>::loval</a>();</div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  <span class="keywordflow">while</span>(len--) {</div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  writeByte(value, clockpin, datapin, datahi, datalo, clockhi, clocklo);</div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  }</div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span> </div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  <span class="comment">// If data and clock are on the same port then we can combine setting the data and clock pins</span></div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  <span class="keyword">register</span> data_t datahi_clockhi = <a class="code" href="class_fast_pin.html">FastPin<DATA_PIN>::hival</a>() | <a class="code" href="class_fast_pin.html">FastPin<CLOCK_PIN>::mask</a>();</div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  <span class="keyword">register</span> data_t datalo_clockhi = <a class="code" href="class_fast_pin.html">FastPin<DATA_PIN>::loval</a>() | <a class="code" href="class_fast_pin.html">FastPin<CLOCK_PIN>::mask</a>();</div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  <span class="keyword">register</span> data_t datahi_clocklo = <a class="code" href="class_fast_pin.html">FastPin<DATA_PIN>::hival</a>() & ~<a class="code" href="class_fast_pin.html">FastPin<CLOCK_PIN>::mask</a>();</div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  <span class="keyword">register</span> data_t datalo_clocklo = <a class="code" href="class_fast_pin.html">FastPin<DATA_PIN>::loval</a>() & ~<a class="code" href="class_fast_pin.html">FastPin<CLOCK_PIN>::mask</a>();</div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span> </div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  <span class="keywordflow">while</span>(len--) {</div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  writeByte(value, datapin, datahi_clockhi, datalo_clockhi, datahi_clocklo, datalo_clocklo);</div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  }</div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  }</div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span> <span class="preprocessor">#endif</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>  <span class="comment">// write a block of len uint8_ts out. Need to type this better so that explicit casts into the call aren't required.</span></div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  <span class="comment">// note that this template version takes a class parameter for a per-byte modifier to the data.</span></div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  <span class="keyword">template</span> <<span class="keyword">class</span> D> <span class="keywordtype">void</span> writeBytes(<span class="keyword">register</span> uint8_t *data, <span class="keywordtype">int</span> len) {</div>
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  select();</div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span> <span class="preprocessor">#ifdef FAST_SPI_INTERRUPTS_WRITE_PINS</span></div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  uint8_t *end = data + len;</div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  <span class="keywordflow">while</span>(data != end) {</div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  writeByte(D::adjust(*data++));</div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  }</div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span> <span class="preprocessor">#else</span></div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  <span class="keyword">register</span> clock_ptr_t clockpin = <a class="code" href="class_fast_pin.html">FastPin<CLOCK_PIN>::port</a>();</div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  <span class="keyword">register</span> data_ptr_t datapin = <a class="code" href="class_fast_pin.html">FastPin<DATA_PIN>::port</a>();</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>  <span class="keywordflow">if</span>(<a class="code" href="class_fast_pin.html">FastPin<DATA_PIN>::port</a>() != <a class="code" href="class_fast_pin.html">FastPin<CLOCK_PIN>::port</a>()) {</div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  <span class="comment">// If data and clock are on different ports, then writing a bit will consist of writing the value foor</span></div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  <span class="comment">// the bit (hi or low) to the data pin port, and then two writes to the clock port to strobe the clock line</span></div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  <span class="keyword">register</span> data_t datahi = <a class="code" href="class_fast_pin.html">FastPin<DATA_PIN>::hival</a>();</div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  <span class="keyword">register</span> data_t datalo = <a class="code" href="class_fast_pin.html">FastPin<DATA_PIN>::loval</a>();</div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  <span class="keyword">register</span> clock_t clockhi = <a class="code" href="class_fast_pin.html">FastPin<CLOCK_PIN>::hival</a>();</div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  <span class="keyword">register</span> clock_t clocklo = <a class="code" href="class_fast_pin.html">FastPin<CLOCK_PIN>::loval</a>();</div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  uint8_t *end = data + len;</div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span> </div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  <span class="keywordflow">while</span>(data != end) {</div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  writeByte(D::adjust(*data++), clockpin, datapin, datahi, datalo, clockhi, clocklo);</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> </div>
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  <span class="comment">// FastPin<CLOCK_PIN>::hi();</span></div>
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  <span class="comment">// If data and clock are on the same port then we can combine setting the data and clock pins</span></div>
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  <span class="keyword">register</span> data_t datahi_clockhi = <a class="code" href="class_fast_pin.html">FastPin<DATA_PIN>::hival</a>() | <a class="code" href="class_fast_pin.html">FastPin<CLOCK_PIN>::mask</a>();</div>
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  <span class="keyword">register</span> data_t datalo_clockhi = <a class="code" href="class_fast_pin.html">FastPin<DATA_PIN>::loval</a>() | <a class="code" href="class_fast_pin.html">FastPin<CLOCK_PIN>::mask</a>();</div>
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  <span class="keyword">register</span> data_t datahi_clocklo = <a class="code" href="class_fast_pin.html">FastPin<DATA_PIN>::hival</a>() & ~<a class="code" href="class_fast_pin.html">FastPin<CLOCK_PIN>::mask</a>();</div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  <span class="keyword">register</span> data_t datalo_clocklo = <a class="code" href="class_fast_pin.html">FastPin<DATA_PIN>::loval</a>() & ~<a class="code" href="class_fast_pin.html">FastPin<CLOCK_PIN>::mask</a>();</div>
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span> </div>
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  uint8_t *end = data + len;</div>
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span> </div>
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  <span class="keywordflow">while</span>(data != end) {</div>
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  writeByte(D::adjust(*data++), datapin, datahi_clockhi, datalo_clockhi, datahi_clocklo, datalo_clocklo);</div>
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  }</div>
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  <span class="comment">// FastPin<CLOCK_PIN>::lo();</span></div>
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  }</div>
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  D::postBlock(len);</div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  release();</div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  }</div>
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span> </div>
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  <span class="comment">// default version of writing a block of data out to the SPI port, with no data modifications being made</span></div>
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  <span class="keywordtype">void</span> writeBytes(<span class="keyword">register</span> uint8_t *data, <span class="keywordtype">int</span> len) { writeBytes<DATA_NOP>(data, len); }</div>
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span> </div>
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span> </div>
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  <span class="comment">// write a block of uint8_ts out in groups of three. len is the total number of uint8_ts to write out. The template</span></div>
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  <span class="comment">// parameters indicate how many uint8_ts to skip at the beginning of each grouping, as well as a class specifying a per</span></div>
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  <span class="comment">// byte of data modification to be made. (See DATA_NOP above)</span></div>
<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  <span class="keyword">template</span> <u<span class="keywordtype">int</span>8_t FLAGS, <span class="keyword">class</span> D, EOrder RGB_ORDER> __attribute__((noinline)) <span class="keywordtype">void</span> writePixels(<a class="code" href="struct_pixel_controller.html">PixelController<RGB_ORDER></a> pixels) {</div>
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  select();</div>
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  <span class="keywordtype">int</span> len = pixels.mLen;</div>
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span> </div>
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span> <span class="preprocessor">#ifdef FAST_SPI_INTERRUPTS_WRITE_PINS</span></div>
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  <span class="comment">// If interrupts or other things may be generating output while we're working on things, then we need</span></div>
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  <span class="comment">// to use this block</span></div>
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  <span class="keywordflow">while</span>(pixels.has(1)) {</div>
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  <span class="keywordflow">if</span>(FLAGS & FLAG_START_BIT) {</div>
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  writeBit<0>(1);</div>
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  }</div>
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  writeByte(D::adjust(pixels.loadAndScale0()));</div>
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  writeByte(D::adjust(pixels.loadAndScale1()));</div>
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  writeByte(D::adjust(pixels.loadAndScale2()));</div>
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  pixels.advanceData();</div>
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  pixels.stepDithering();</div>
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  }</div>
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span> <span class="preprocessor">#else</span></div>
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  <span class="comment">// If we can guaruntee that no one else will be writing data while we are running (namely, changing the values of the PORT/PDOR pins)</span></div>
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  <span class="comment">// then we can use a bunch of optimizations in here</span></div>
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  <span class="keyword">register</span> data_ptr_t datapin = <a class="code" href="class_fast_pin.html">FastPin<DATA_PIN>::port</a>();</div>
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span> </div>
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  <span class="keywordflow">if</span>(<a class="code" href="class_fast_pin.html">FastPin<DATA_PIN>::port</a>() != <a class="code" href="class_fast_pin.html">FastPin<CLOCK_PIN>::port</a>()) {</div>
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  <span class="keyword">register</span> clock_ptr_t clockpin = <a class="code" href="class_fast_pin.html">FastPin<CLOCK_PIN>::port</a>();</div>
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  <span class="comment">// If data and clock are on different ports, then writing a bit will consist of writing the value foor</span></div>
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  <span class="comment">// the bit (hi or low) to the data pin port, and then two writes to the clock port to strobe the clock line</span></div>
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  <span class="keyword">register</span> data_t datahi = <a class="code" href="class_fast_pin.html">FastPin<DATA_PIN>::hival</a>();</div>
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  <span class="keyword">register</span> data_t datalo = <a class="code" href="class_fast_pin.html">FastPin<DATA_PIN>::loval</a>();</div>
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  <span class="keyword">register</span> clock_t clockhi = <a class="code" href="class_fast_pin.html">FastPin<CLOCK_PIN>::hival</a>();</div>
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  <span class="keyword">register</span> clock_t clocklo = <a class="code" href="class_fast_pin.html">FastPin<CLOCK_PIN>::loval</a>();</div>
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span> </div>
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  <span class="keywordflow">while</span>(pixels.has(1)) {</div>
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  <span class="keywordflow">if</span>(FLAGS & FLAG_START_BIT) {</div>
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  writeBit<0>(1, clockpin, datapin, datahi, datalo, clockhi, clocklo);</div>
<div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  }</div>
<div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  writeByte(D::adjust(pixels.loadAndScale0()), clockpin, datapin, datahi, datalo, clockhi, clocklo);</div>
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  writeByte(D::adjust(pixels.loadAndScale1()), clockpin, datapin, datahi, datalo, clockhi, clocklo);</div>
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  writeByte(D::adjust(pixels.loadAndScale2()), clockpin, datapin, datahi, datalo, clockhi, clocklo);</div>
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  pixels.advanceData();</div>
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  pixels.stepDithering();</div>
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  }</div>
<div class="line"><a name="l00327"></a><span class="lineno"> 327</span> </div>
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  <span class="comment">// If data and clock are on the same port then we can combine setting the data and clock pins</span></div>
<div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  <span class="keyword">register</span> data_t datahi_clockhi = <a class="code" href="class_fast_pin.html">FastPin<DATA_PIN>::hival</a>() | <a class="code" href="class_fast_pin.html">FastPin<CLOCK_PIN>::mask</a>();</div>
<div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  <span class="keyword">register</span> data_t datalo_clockhi = <a class="code" href="class_fast_pin.html">FastPin<DATA_PIN>::loval</a>() | <a class="code" href="class_fast_pin.html">FastPin<CLOCK_PIN>::mask</a>();</div>
<div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  <span class="keyword">register</span> data_t datahi_clocklo = <a class="code" href="class_fast_pin.html">FastPin<DATA_PIN>::hival</a>() & ~<a class="code" href="class_fast_pin.html">FastPin<CLOCK_PIN>::mask</a>();</div>
<div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  <span class="keyword">register</span> data_t datalo_clocklo = <a class="code" href="class_fast_pin.html">FastPin<DATA_PIN>::loval</a>() & ~<a class="code" href="class_fast_pin.html">FastPin<CLOCK_PIN>::mask</a>();</div>
<div class="line"><a name="l00334"></a><span class="lineno"> 334</span> </div>
<div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  <span class="keywordflow">while</span>(pixels.has(1)) {</div>
<div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  <span class="keywordflow">if</span>(FLAGS & FLAG_START_BIT) {</div>
<div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  writeBit<0>(1, datapin, datahi_clockhi, datalo_clockhi, datahi_clocklo, datalo_clocklo);</div>
<div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  }</div>
<div class="line"><a name="l00339"></a><span class="lineno"> 339</span>  writeByte(D::adjust(pixels.loadAndScale0()), datapin, datahi_clockhi, datalo_clockhi, datahi_clocklo, datalo_clocklo);</div>
<div class="line"><a name="l00340"></a><span class="lineno"> 340</span>  writeByte(D::adjust(pixels.loadAndScale1()), datapin, datahi_clockhi, datalo_clockhi, datahi_clocklo, datalo_clocklo);</div>
<div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  writeByte(D::adjust(pixels.loadAndScale2()), datapin, datahi_clockhi, datalo_clockhi, datahi_clocklo, datalo_clocklo);</div>
<div class="line"><a name="l00342"></a><span class="lineno"> 342</span>  pixels.advanceData();</div>
<div class="line"><a name="l00343"></a><span class="lineno"> 343</span>  pixels.stepDithering();</div>
<div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  }</div>
<div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  }</div>
<div class="line"><a name="l00346"></a><span class="lineno"> 346</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00347"></a><span class="lineno"> 347</span>  D::postBlock(len);</div>
<div class="line"><a name="l00348"></a><span class="lineno"> 348</span>  release();</div>
<div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  }</div>
<div class="line"><a name="l00350"></a><span class="lineno"> 350</span> };</div>
<div class="line"><a name="l00351"></a><span class="lineno"> 351</span> </div>
<div class="line"><a name="l00352"></a><span class="lineno"> 352</span> FASTLED_NAMESPACE_END</div>
<div class="line"><a name="l00353"></a><span class="lineno"> 353</span> </div>
<div class="line"><a name="l00354"></a><span class="lineno"> 354</span> <span class="preprocessor">#endif</span></div>
<div class="ttc" id="struct_pixel_controller_html"><div class="ttname"><a href="struct_pixel_controller.html">PixelController</a></div><div class="ttdoc">Pixel controller class. </div><div class="ttdef"><b>Definition:</b> controller.h:181</div></div>
<div class="ttc" id="class_selectable_html"><div class="ttname"><a href="class_selectable.html">Selectable</a></div><div class="ttdef"><b>Definition:</b> fastpin.h:16</div></div>
<div class="ttc" id="class_a_v_r_software_s_p_i_output_html"><div class="ttname"><a href="class_a_v_r_software_s_p_i_output.html">AVRSoftwareSPIOutput</a></div><div class="ttdef"><b>Definition:</b> fastspi_bitbang.h:17</div></div>
<div class="ttc" id="class_fast_pin_html"><div class="ttname"><a href="class_fast_pin.html">FastPin</a></div><div class="ttdoc">The simplest level of Pin class. </div><div class="ttdef"><b>Definition:</b> fastpin.h:151</div></div>
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