linux-st7735/st7735.h

#ifndef uint8
#define uint8 unsigned char
#endif
 
typedef struct
{
	int cs, a0, rs;
	uint8 width, height;
} lcd_t;

/*
 * Initialize the display and create a data structure for it.
 * The last initialized display is active.
 *
 * Parameters:
 *   spiSpeed - Speed of the SPI interface.
 *   cs - Chip selection pin.
 *   a0 - Data/Command pin.
 *   rs - Optional reset pin. If you do not use it, enter -1.
 *
 * Return: Pointer to the structure with display data.
 *
 */
lcd_t *lcd_init(int spiSpeed, int cs, int a0, int rs);

/*
 * Reset the specified display and clear the previously assigned memory.
 *
 * Parameters:
 *   display - Pointer to the structure with display data.
 *
 * Return: void
 */
void lcd_deinit(lcd_t *display);

/*
 * Set the drawing area on the currently active display.
 *
 * Parameters:
 *   x1 - The X parameter of the first point.
 *   y1 - The Y parameter of the first point.
 *   x2 - The X parameter of the second point.
 *   y2 - The Y parameter of the second point.
 *
 * Return: Confirmation of the occurrence or non-occurrence of an error.
 * 0 - The error did not occur; 1 - The error occurred.
 *
 */
uint8 lcd_setWindow(uint8 x1, uint8 y1, uint8 x2, uint8 y2);

/*
 * Draw one pixel on the currently active display.
 * The color intensity scale for a normal pixel is from 0 to 255.
 * The color intensity scale for the reduced pixel is from 0 to 15.
 *
 * Parameters:
 *   x - The X parameter of the pixel.
 *   y - The Y parameter of the pixel.
 *   r - The intensity of the red color.
 *   g - The intensity of the green color.
 *   b - The intensity of the blue color.
 *
 * Return: void
 */
void lcd_drawPx(uint8 x, uint8 y, uint8 r, uint8 g, uint8 b);

/*
 * Draw a filled rectangle on the currently active display.
 * The color intensity scale for a normal pixel is from 0 to 255.
 * The color intensity scale for the reduced pixel is from 0 to 15.
 *
 * Parameters:
 *   x - Parameter X of the upper left corner of the rectangle.
 *   y - Parameter Y of the upper left corner of the rectangle.
 *   w - The width of the rectangle.
 *   h - The height of the rectangle.
 *   r - The intensity of the red color.
 *   g - The intensity of the green color.
 *   b - The intensity of the blue color.
 *
 * Return: void
 */
void lcd_fillRect(uint8 x, uint8 y, uint8 w, uint8 h, uint8 r, uint8 g, uint8 b);

/*
 * Fill the entire screen with one color of the currently active display.
 * The color intensity scale for a normal pixel is from 0 to 255.
 * The color intensity scale for the reduced pixel is from 0 to 15.
 *
 * Parameters:
 *   r - The intensity of the red color.
 *   g - The intensity of the green color.
 *   b - The intensity of the blue color.
 *
 * Return: void
 */
void lcd_fillScreen(uint8 r, uint8 g, uint8 b);

void lcd_printChar(uint8 x, uint8 y, char c);
void lcd_printText(uint8 x, uint8 y, char* text);