81 lines
1.8 KiB
C
81 lines
1.8 KiB
C
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#ifndef uint8
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#define uint8 unsigned char
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#endif
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#ifndef __SPILCD_H__
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#define __SPILCD_H__
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typedef struct
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{
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int channel;
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int cs, a0, rs;
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uint8 width, height;
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} lcd_t;
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/*
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* Initialize the display.
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*
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* Parameters:
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* spiSpeed - Speed of the SPI interface.
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* channel - SPI channel
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* cs - Chip selection pin.
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* a0 - Data/Command pin.
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* rs - Optional reset pin. Use -1 when not connected.
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*
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* Return: Pointer to the structure with display data.
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*
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*/
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lcd_t *lcd_init(int spiSpeed, int channel, int cs, int a0, int rs);
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/*
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* Reset the specified display and clear the previously assigned memory.
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*
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* Parameters:
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* lcd - display to use
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*
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* Return: void
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*/
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void lcd_deinit(lcd_t *lcd);
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/*
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* Set the drawing area.
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*
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* Parameters:
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* lcd - display to use
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* x1 - The X parameter of the starting point.
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* y1 - The Y parameter of the starting point.
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* x2 - The X parameter of the ending point.
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* y2 - The Y parameter of the ending point.
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*
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* Return: 0 for success, 1 for error.
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*
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*/
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uint8 lcd_setWindow(lcd_t* lcd, uint8 x1, uint8 y1, uint8 x2, uint8 y2);
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/*
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* Push a pixel into the previously set drawing area.
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*
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* Parameters:
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* lcd - display to use
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* r - red color (0 to 255)
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* g - green color (0 to 255)
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* b - blue color (0 to 255)
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*/
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void lcd_pushPixel(lcd_t* lcd, uint8 r, uint8 g, uint8 b);
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/*
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* Push an array of pixels into the previously set drawing area.
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* Significantly faster than pushing pixels individually.
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*
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* Parameters:
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* lcd - display to use
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* pixels - array of pixels where:
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* pixels[i * 3 + 0] = i-th red color (0 to 255)
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* pixels[i * 3 + 1] = i-th green color (0 to 255)
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* pixels[i * 3 + 2] = i-th blue color (0 to 255)
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* count - number of pixels in the array
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*/
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void lcd_pushPixels(lcd_t* lcd, uint8* pixels, size_t count);
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#endif // __SPILCD_H__
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