lib/unigraphic/SSD1322.h

Mon, 11 Mar 2024 15:35:36 +0100

author
David Douard <david.douard@sdf3.org>
date
Mon, 11 Mar 2024 15:35:36 +0100
changeset 71
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parent 66
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permissions
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Add links to sr.ht repos and add an image in the README file

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1 #ifndef MBED_SSD1322_H
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2 #define MBED_SSD1322_H
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3
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4 #include "mbed.h"
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5 #include "GraphicsDisplay.h"
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6
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7 //Display module specs
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8 #define DISPLAY_WIDTH (256)
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9 #define DISPLAY_HEIGHT (64)
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10 #define DISPLAY_BUFFER_TYPE uint8_t
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11 #define DISPLAY_BUFFER_TYPE_SIZE (2) // 2 pixel / byte
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12 #define DISPLAY_BUFFER_ELEMENTS 8192 // 256*64 / 2 (because 2 pixels/byte)
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14
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15 /** Mirror mode */
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16 enum mirror_t {X, Y, XY, NONE};
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17
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18 typedef enum {
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19 IDLE, // No operation currently ongoing
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20 CLEARING, // In the process of clearing the display
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21 WRITING, // In the process of sending a display update
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22 WAIT_CLEAR, // Going to clear after CS pin timeout
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23 WAIT_WRITE, // Going to write after CS pin timeout
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24 TRANSFERS_DONE, // Last transfer in progress
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25 DONE, // Done with transmission, waiting for CS pin to become high
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26 } SSD1322_state_t;
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27
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28 /** A common base class for monochrome Display
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29 */
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30 class SSD1322: public GraphicsDisplay
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31 {
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33 public:
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35
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36 /** Create a monochrome SSD1322 SPI interface
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37 * @param name The name used by the parent class to access the interface
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38 */
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39 SSD1322(int Hz, PinName mosi, PinName miso, PinName sclk, PinName CS, PinName reset, PinName DC,
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40 const char* name);
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41
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42 /** Destructor
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43 * will free framebuffer
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44 */
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45 virtual ~SSD1322() {};
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46
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47 void power_off();
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48 void power_on();
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49
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50 /////// functions that come for free, but can be overwritten///////////////////////////////////////////////////
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51 /////// ----------------------------------------------------///////////////////////////////////////////////////
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52
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53 /** Draw a pixel in the specified color.
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54 * @param x is the horizontal offset to this pixel.
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55 * @param y is the vertical offset to this pixel.
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56 * @param color defines the color for the pixel.
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57 */
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58 virtual void pixel(int x, int y, unsigned short color);
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59
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60 /** Set the window, which controls where items are written to the screen.
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61 * When something hits the window width, it wraps back to the left side
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62 * and down a row. If the initial write is outside the window, it will
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63 * be captured into the window when it crosses a boundary.
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64 * @param x is the left edge in pixels.
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65 * @param y is the top edge in pixels.
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66 * @param w is the window width in pixels.
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67 * @param h is the window height in pixels.
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68 */
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69 virtual void window(int x, int y, int w, int h);
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70
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71 /** Read pixel color at location
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72 * @param x is the horizontal offset to this pixel.
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73 * @param y is the vertical offset to this pixel.
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74 * @returns 16bit color, 0000=Black(pixel set), FFFF=White(pixel clear).
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75 */
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76 virtual unsigned short pixelread(int x, int y);
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77
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78 /** Push a single pixel into the window and increment position.
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79 * You must first call window() then push pixels in loop.
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80 * @param color is the pixel color.
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81 */
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82 virtual void window_pushpixel(unsigned short color);
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84 /** Push some pixels of the same color into the window and increment position.
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85 * You must first call window() then push pixels.
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86 * @param color is the pixel color.
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87 * @param count: how many
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88 */
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89 virtual void window_pushpixel(unsigned short color, unsigned int count);
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90
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91 /** Push array of pixel colors into the window and increment position.
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92 * You must first call window() then push pixels.
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93 * @param color is the pixel color.
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94 */
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95 virtual void window_pushpixelbuf(unsigned short* color, unsigned int lenght);
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96
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97 /** Framebuffer is used, it needs to be sent to SSD1322 from time to time
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98 */
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99 virtual void copy_to_lcd();
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100
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101 /** set the contrast of the screen
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102 *
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103 * @param o contrast 0-63
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104 * @note may be overrided in case of not standard command
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105 */
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106 virtual void set_contrast(int o);
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107
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108 /** read the contrast level
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109 *
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110 */
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111 int get_contrast(void);
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112
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113 /** display inverted colors
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114 *
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115 * @param o = 0 normal, 1 invert
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116 */
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117 void invert(unsigned char o);
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118
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119 /** clear the entire screen
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120 * The inherited one sets windomax then fill with background color
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121 * We override it to speedup
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122 */
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123 virtual void cls();
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124
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125 /** Set the orientation of the screen
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126 * x,y: 0,0 is always top left
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127 *
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128 * @param o direction to use the screen (0-3)
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129 * 0 = -90°
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130 * 1 = default 0°
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131 * 2 = +90°
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132 * 3 = +180°
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133 *
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134 */
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135 void set_orientation(int o);
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136
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137 /** Set ChipSelect high or low
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138 * @param enable 0/1
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139 */
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140 virtual void bus_enable(bool enable);
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141
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142 /** get display X size in pixels (native, orientation independent)
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143 * @returns X size in pixels
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144 */
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145 int sizeX() {return screensize_X;};
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146
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147 /** get display Y size in pixels (native, orientation independent)
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148 * @returns Y size in pixels
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149 */
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150 int sizeY() {return screensize_Y;};
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151
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152 ////////////////////////////////////////////////////////////////////////////////
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153 // not implemented yet
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154 //////////////////////////////////////////////////////////////////
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155 // virtual unsigned short pixelread(int x, int y){return 0;};
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156 virtual void window4read(int x, int y, int w, int h){};
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157 void setscrollarea (int startY, int areasize){};
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158 void scroll (int lines){};
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159 void scrollreset(){};
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160 void FastWindow(bool enable){};
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161
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162 unsigned int buffsize() { return _PAGES*screensize_X;};
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163 unsigned short pixelpos(int x, int y);
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164 void clrbuff(const unsigned char value=0x00);
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165 unsigned long buffaddr(unsigned int i);
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166 void fills(const unsigned char value=0xFF);
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167
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168 void set_row_address(unsigned char start_row=0x00, unsigned char end_row=0x3F);
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169 void set_column_address(unsigned char start_col=0x00, unsigned char end_col=0x3F);
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170
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171 virtual void copy_to_lcd(unsigned char from_col, unsigned char to_col,
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172 unsigned char from_row, unsigned char to_row);
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173
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174 protected:
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175 /** Setup some stuff (malloc the buffer, etc)
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176 */
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177 void init();
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178
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179 /** set mirror mode
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180 * @note may be overridden by specific display init class in case of not standard cmds or inverted wiring
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181 * @param mode NONE, X, Y, XY
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182 */
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183 virtual void mirrorXY(mirror_t mode);
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184
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185 ////// functions needed by parent class ///////////////////////////////////////
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186 ////// -------------------------------- ///////////////////////////////////////
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187
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188 /** Send 8bit command to display controller
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189 *
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190 * @param cmd: byte to send
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191 * @note if protocol is SPI16, it will insert NOP cmd before, so if cmd is a 2byte cmd, the second cmd will be broken. Use wr_cmd16 for 2bytes cmds
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192 */
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193 void wr_cmd8(unsigned char cmd);
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194
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195 /** Send 8bit data to display controller
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196 *
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197 * @param data: byte to send
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198 *
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199 */
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200 void wr_data8(unsigned char data);
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201
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202 /** HW reset sequence (without display init commands)
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203 */
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204 void hw_reset();
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205
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206 int contrast;
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207
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208 protected:
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209
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210 const int screensize_X;
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211 const int screensize_Y;
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212 const int _PAGES;
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213 const int _BPP;
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214 const int _IC_X_SEGS;
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215 const int _IC_Y_COMS;
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216 const int _IC_PAGES;
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217
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218 mbed::SPI _spi;
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219 DigitalOut _DC;
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220 DigitalOut _CS;
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221 DigitalOut _RST;
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222 volatile DISPLAY_BUFFER_TYPE _pixelBuffer[DISPLAY_BUFFER_ELEMENTS]; // one full frame buffer
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223 DISPLAY_BUFFER_TYPE _trBuffer[DISPLAY_BUFFER_ELEMENTS]; // for sending
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224
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225 // pixel location
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226 int cur_x;
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227 int cur_y;
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228 // window location
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229 int win_x1;
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230 int win_x2;
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231 int win_y1;
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232 int win_y2;
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233 int orientation;
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234 Mutex pixel_buffer_mutex; // used when being copied to the transerf buffer
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235 SSD1322_state_t _state;
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236 #ifdef DEVICE_SPI_ASYNCH
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237 event_callback_t _spiEventCb;
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238 #endif
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239
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240 };
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241
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242 #endif

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