79 lines
1.8 KiB
C
79 lines
1.8 KiB
C
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// This is the command sequence that rotates the ST7796 driver coordinate frame
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rotation = m % 8; // Limit the range of values to 0-7
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writecommand(TFT_MADCTL);
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switch (rotation) {
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case 0:
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writedata(TFT_MAD_MX | TFT_MAD_COLOR_ORDER);
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_width = _init_width;
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_height = _init_height;
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#ifdef CGRAM_OFFSET
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if (_init_width == 222)
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{
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colstart = 49;
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rowstart = 0;
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}
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#endif
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break;
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case 1:
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writedata(TFT_MAD_MV | TFT_MAD_COLOR_ORDER);
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_width = _init_height;
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_height = _init_width;
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#ifdef CGRAM_OFFSET
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if (_init_width == 222)
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{
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colstart = 0;
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rowstart = 49;
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}
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#endif
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break;
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case 2:
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writedata(TFT_MAD_MY | TFT_MAD_COLOR_ORDER);
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_width = _init_width;
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_height = _init_height;
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#ifdef CGRAM_OFFSET
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if (_init_width == 222)
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{
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colstart = 49;
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rowstart = 0;
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}
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#endif
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break;
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case 3:
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writedata(TFT_MAD_MX | TFT_MAD_MY | TFT_MAD_MV | TFT_MAD_COLOR_ORDER);
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_width = _init_height;
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_height = _init_width;
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#ifdef CGRAM_OFFSET
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if (_init_width == 222)
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{
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colstart = 0;
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rowstart = 49;
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}
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#endif
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break;
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// These next rotations are for bottom up BMP drawing
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case 4:
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writedata(TFT_MAD_MX | TFT_MAD_MY | TFT_MAD_COLOR_ORDER);
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_width = _init_width;
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_height = _init_height;
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break;
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case 5:
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writedata(TFT_MAD_MV | TFT_MAD_MX | TFT_MAD_COLOR_ORDER);
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_width = _init_height;
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_height = _init_width;
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break;
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case 6:
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writedata(TFT_MAD_COLOR_ORDER);
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_width = _init_width;
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_height = _init_height;
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break;
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case 7:
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writedata(TFT_MAD_MY | TFT_MAD_MV | TFT_MAD_COLOR_ORDER);
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_width = _init_height;
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_height = _init_width;
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break;
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}
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