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216 lines
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<div id="projectname">PicoVGA
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 <span id="projectnumber">1.2-cmake</span>
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<div id="projectbrief">VGA/TV display on Raspberry Pico</div>
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<div class="title">vga_config.h</div> </div>
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<div class="contents">
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span>  </div>
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<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">// ****************************************************************************</span></div>
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<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">// </span></div>
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<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">// VGA configuration</span></div>
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<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">//</span></div>
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<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment">// ****************************************************************************</span></div>
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<div class="line"><a name="l00007"></a><span class="lineno"> 7</span>  </div>
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<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">// === Configuration</span></div>
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<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor">#define LAYERS 4 </span><span class="comment">// total layers 1..4 (1 base layer + 3 overlapped layers)</span></div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#define SEGMAX 8 </span><span class="comment">// max. number of video segment per video strip (size of 1 sSegm = 28 bytes)</span></div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor">#define STRIPMAX 8 </span><span class="comment">// max. number of video strips (size of 1 sStrip = sSegm size*SEGMAX+4 = 228 bytes)</span></div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span>  <span class="comment">// size of sScreen = sStrip size*STRIPMAX+4 = 1828 bytes</span></div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>  </div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#define MAXX 640 </span><span class="comment">// max. resolution in X direction (must be power of 4)</span></div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#define MAXY 480 </span><span class="comment">// max. resolution in Y direction</span></div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>  </div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="preprocessor">#define MAXLINE 700 </span><span class="comment">// max. number of scanlines (including sync and dark lines)</span></div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>  </div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment">// === Scanline render buffers (800 pixels: default size of buffers = 2*4*(800+8+800+24)+800 = 13856 bytes</span></div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment">// Requirements by format, base layer 0, 1 wrap X segment:</span></div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment">// GF_GRAPH8 ... control buffer 16 bytes</span></div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment">// GF_TILE8 ... control buffer "width"+8 bytes</span></div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment">// GF_TILE16 ... control buffer "width/2"+8 bytes</span></div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment">// GF_TILE32 ... control buffer "width/4"+8 bytes</span></div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment">// GF_TILE64 ... control buffer "width/8"+8 bytes</span></div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment">// GF_PROGRESS ... control buffer 24 bytes</span></div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment">// other formats: data buffer "width" bytes, control buffer 16 bytes</span></div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor">#define DBUF0_MAX (MAXX+8) </span><span class="comment">// max. size of data buffer of layer 0</span></div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#define CBUF0_MAX ((MAXX+24)/4) </span><span class="comment">// max. size of control buffer of layer 0</span></div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  </div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment">// Requirements by format, overlapped layer 1..3:</span></div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment">// LAYERMODE_SPRITE* ... data buffer "width"+4 bytes, control buffer 24 bytes</span></div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="comment">// LAYERMODE_FASTSPRITE* ... data buffer "width"+4 bytes, control buffer up to "width*2"+16 bytes</span></div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="comment">// other formats ... data buffer 4 bytes, control buffer 24 bytes</span></div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="preprocessor">#define DBUF1_MAX (MAXX+8) </span><span class="comment">// max. size of data buffer of layer 1</span></div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="preprocessor">#define CBUF1_MAX ((MAXX+24)/4) </span><span class="comment">// max. size of control buffer of layer 1</span></div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  </div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="preprocessor">#define DBUF2_MAX (MAXX+8) </span><span class="comment">// max. size of data buffer of layer 2</span></div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="preprocessor">#define CBUF2_MAX ((MAXX+24)/4) </span><span class="comment">// max. size of control buffer of layer 2</span></div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  </div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="preprocessor">#define DBUF3_MAX (MAXX+8) </span><span class="comment">// max. size of data buffer of layer 3</span></div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="preprocessor">#define CBUF3_MAX ((MAXX+24)/4) </span><span class="comment">// max. size of control buffer of layer 3</span></div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  </div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="preprocessor">#if LAYERS==1</span></div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="preprocessor">#define DBUF_MAX DBUF0_MAX </span><span class="comment">// max. size of data buffer</span></div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="preprocessor">#define CBUF_MAX CBUF0_MAX </span><span class="comment">// max. size of control buffer</span></div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="preprocessor">#elif LAYERS==2</span></div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="preprocessor">#define DBUF_MAX (DBUF0_MAX+DBUF1_MAX) </span><span class="comment">// max. size of data buffer</span></div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="preprocessor">#define CBUF_MAX (CBUF0_MAX+CBUF1_MAX) </span><span class="comment">// max. size of control buffer</span></div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="preprocessor">#elif LAYERS==3</span></div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="preprocessor">#define DBUF_MAX (DBUF0_MAX+DBUF1_MAX+DBUF2_MAX) </span><span class="comment">// max. size of data buffer</span></div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="preprocessor">#define CBUF_MAX (CBUF0_MAX+CBUF1_MAX+CBUF2_MAX) </span><span class="comment">// max. size of control buffer</span></div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="preprocessor">#elif LAYERS==4</span></div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="preprocessor">#define DBUF_MAX (DBUF0_MAX+DBUF1_MAX+DBUF2_MAX+DBUF3_MAX) </span><span class="comment">// max. size of data buffer</span></div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="preprocessor">#define CBUF_MAX (CBUF0_MAX+CBUF1_MAX+CBUF2_MAX+CBUF3_MAX) </span><span class="comment">// max. size of control buffer</span></div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="preprocessor">#else</span></div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="preprocessor">#error Unsupported number of layers!</span></div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="preprocessor">#endif</span></div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  </div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="comment">// === VGA port pins</span></div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="comment">// GP0 ... VGA B0 blue</span></div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="comment">// GP1 ... VGA B1</span></div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="comment">// GP2 ... VGA G0 green</span></div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="comment">// GP3 ... VGA G1</span></div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="comment">// GP4 ... VGA G2</span></div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="comment">// GP5 ... VGA R0 red</span></div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="comment">// GP6 ... VGA R1</span></div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="comment">// GP7 ... VGA R2</span></div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="comment">// GP8 ... VGA SYNC synchronization (inverted: negative SYNC=LOW=0x80, BLACK=HIGH=0x00)</span></div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="preprocessor">#define VGA_GPIO_FIRST 0 </span><span class="comment">// first VGA GPIO</span></div>
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<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="preprocessor">#define VGA_GPIO_NUM 9 </span><span class="comment">// number of VGA GPIOs, including HSYNC and VSYNC</span></div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="preprocessor">#define VGA_GPIO_OUTNUM 8 </span><span class="comment">// number of VGA color GPIOs, without HSYNC and VSYNC</span></div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="preprocessor">#define VGA_GPIO_LAST (VGA_GPIO_FIRST+VGA_GPIO_NUM-1) </span><span class="comment">// last VGA GPIO</span></div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="preprocessor">#define VGA_GPIO_SYNC 8 </span><span class="comment">// VGA SYNC GPIO</span></div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  </div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="comment">// VGA PIO and state machines</span></div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="preprocessor">#define VGA_PIO pio0 </span><span class="comment">// VGA PIO</span></div>
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<div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="preprocessor">#define VGA_SM0 0 </span><span class="comment">// VGA state machine of base layer 0</span></div>
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<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="preprocessor">#define VGA_SM1 1 </span><span class="comment">// VGA state machine of overlapped layer 1</span></div>
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<div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="preprocessor">#define VGA_SM2 2 </span><span class="comment">// VGA state machine of overlapped layer 2</span></div>
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<div class="line"><a name="l00081"></a><span class="lineno"> 81</span> <span class="preprocessor">#define VGA_SM3 3 </span><span class="comment">// VGA state machine of overlapped layer 3</span></div>
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<div class="line"><a name="l00082"></a><span class="lineno"> 82</span> <span class="preprocessor">#define VGA_SM(layer) (VGA_SM0+(layer)) </span><span class="comment">// VGA state machine of the layer</span></div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  </div>
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<div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="preprocessor">#if LAYERS==1</span></div>
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<div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="preprocessor">#define VGA_SMALL B0 </span><span class="comment">// mask of all state machines</span></div>
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<div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="preprocessor">#elif LAYERS==2</span></div>
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<div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="preprocessor">#define VGA_SMALL (B0+B1) </span><span class="comment">// mask of all state machines</span></div>
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<div class="line"><a name="l00088"></a><span class="lineno"> 88</span> <span class="preprocessor">#elif LAYERS==3</span></div>
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<div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="preprocessor">#define VGA_SMALL (B0+B1+B2) </span><span class="comment">// mask of all state machines</span></div>
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<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> <span class="preprocessor">#elif LAYERS==4</span></div>
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<div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="preprocessor">#define VGA_SMALL (B0+B1+B2+B3) </span><span class="comment">// mask of all state machines</span></div>
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<div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="preprocessor">#else</span></div>
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<div class="line"><a name="l00093"></a><span class="lineno"> 93</span> <span class="preprocessor">#error Unsupported number of layers!</span></div>
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<div class="line"><a name="l00094"></a><span class="lineno"> 94</span> <span class="preprocessor">#endif</span></div>
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<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  </div>
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<div class="line"><a name="l00096"></a><span class="lineno"> 96</span> <span class="comment">// VGA DMA</span></div>
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<div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="preprocessor">#define VGA_DMA 0 </span><span class="comment">// VGA DMA base channel</span></div>
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<div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="preprocessor">#define VGA_DMA_CB0 (VGA_DMA+0) </span><span class="comment">// VGA DMA channel - control block of base layer</span></div>
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<div class="line"><a name="l00099"></a><span class="lineno"> 99</span> <span class="preprocessor">#define VGA_DMA_PIO0 (VGA_DMA+1) </span><span class="comment">// VGA DMA channel - copy data of base layer to PIO (raises IRQ0 on quiet)</span></div>
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<div class="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="preprocessor">#define VGA_DMA_CB1 (VGA_DMA+2) </span><span class="comment">// VGA DMA channel - control block of overlapped layer 1</span></div>
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<div class="line"><a name="l00101"></a><span class="lineno"> 101</span> <span class="preprocessor">#define VGA_DMA_PIO1 (VGA_DMA+3) </span><span class="comment">// VGA DMA channel - copy data of overlapped layer 1 to PIO</span></div>
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<div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="preprocessor">#define VGA_DMA_CB2 (VGA_DMA+4) </span><span class="comment">// VGA DMA channel - control block of overlapped layer 1</span></div>
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<div class="line"><a name="l00103"></a><span class="lineno"> 103</span> <span class="preprocessor">#define VGA_DMA_PIO2 (VGA_DMA+5) </span><span class="comment">// VGA DMA channel - copy data of overlapped layer 2 to PIO</span></div>
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<div class="line"><a name="l00104"></a><span class="lineno"> 104</span> <span class="preprocessor">#define VGA_DMA_CB3 (VGA_DMA+6) </span><span class="comment">// VGA DMA channel - control block of overlapped layer 1</span></div>
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<div class="line"><a name="l00105"></a><span class="lineno"> 105</span> <span class="preprocessor">#define VGA_DMA_PIO3 (VGA_DMA+7) </span><span class="comment">// VGA DMA channel - copy data of overlapped layer 3 to PIO</span></div>
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<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  </div>
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<div class="line"><a name="l00107"></a><span class="lineno"> 107</span> <span class="preprocessor">#define VGA_DMA_CB(layer) (VGA_DMA_CB0+(layer)*2) </span><span class="comment">// VGA DMA control channel of the layer</span></div>
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<div class="line"><a name="l00108"></a><span class="lineno"> 108</span> <span class="preprocessor">#define VGA_DMA_PIO(layer) (VGA_DMA_PIO0+(layer)*2) </span><span class="comment">// VGA DMA data channel of the layer</span></div>
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<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  </div>
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<div class="line"><a name="l00110"></a><span class="lineno"> 110</span> <span class="preprocessor">#define VGA_DMA_NUM (LAYERS*2) </span><span class="comment">// number of used DMA channels</span></div>
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<div class="line"><a name="l00111"></a><span class="lineno"> 111</span> <span class="preprocessor">#define VGA_DMA_FIRST VGA_DMA </span><span class="comment">// first used DMA</span></div>
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<div class="line"><a name="l00112"></a><span class="lineno"> 112</span> <span class="preprocessor">#define VGA_DMA_LAST (VGA_DMA_FIRST+VGA_DMA_NUM-1) </span><span class="comment">// last used DMA</span></div>
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