lcd.h

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#pragma once
 
#ifdef __cplusplus
extern "C" {
#endif
 
#include <stdint.h>
 
#define __UCONCAT(a, b) #a b
#define _UCONCAT(a, b) __UCONCAT(a, b)
#define UCONCAT(b) _UCONCAT(__USER_LABEL_PREFIX__, b)
 
enum LCD_Palette {
    PALETTE_BLACK = 0,
    PALETTE_BLUE = 1,
    PALETTE_GREEN = 2,
    PALETTE_CYAN = 3,
    PALETTE_RED = 4,
    PALETTE_MAGENTA = 5,
    PALETTE_YELLOW = 6,
    PALETTE_WHITE = 7
};
 
enum LCD_Command {
    COMMAND_SET_X_WINDOW = 0x2A,
    COMMAND_SET_Y_WINDOW = 0x2B,
    COMMAND_PREPARE_FOR_DRAW_DATA = 0x2C,
    COMMAND_READ_DRAW_DATA = 0x2E
};
 
volatile uint16_t *const lcd_data_port = (volatile uint16_t *)0xB4000000;
 
#define RGB_TO_RGB565(r, g, b) ( \
    ((r & 0x1F) << 11) | \
    ((g & 0x3F) << 5) | \
    (b & 0x1F) \
)
 
#define RGB565_TO_R(rgb565) ((rgb565 >> 11) & 0x1F)
 
#define RGB565_TO_G(rgb565) ((rgb565 >> 5) & 0x3F)
 
#define RGB565_TO_B(rgb565) (rgb565 & 0x1F)
 
extern void (*LCD_ClearScreen)();
 
extern uint16_t (*LCD_GetPixel)(unsigned int x, unsigned int y);
 
extern void (*LCD_GetSize)(unsigned int *width, unsigned int *height);
 
extern uint16_t *(*_FP_LCD_GetVRAMAddress)() __asm__ (UCONCAT("LCD_GetVRAMAddress"));
 
static inline __attribute__((const, always_inline)) uint16_t *LCD_GetVRAMAddress() {
    return _FP_LCD_GetVRAMAddress();
}
 
extern void (*LCD_Refresh)();
 
extern void (*LCD_SetPixel)(unsigned int x, unsigned int y, uint16_t color);
 
extern void (*LCD_SetPixelFromPaletteU)(unsigned int x, unsigned int y, uint8_t index) __asm__ (UCONCAT("LCD_SetPixelFromPalette"));
 
static inline __attribute__((always_inline)) void LCD_SetPixelFromPalette(unsigned int x, unsigned int y, enum LCD_Palette color) {
    LCD_SetPixelFromPaletteU(x, y, (uint8_t)color);
}
 
extern void (*LCD_VRAMBackup)();
 
extern void (*LCD_VRAMRestore)();
 
extern void (*LCD_SendCommandU)(uint16_t command) __asm__ (UCONCAT("LCD_SendCommand"));
 
static inline __attribute__((always_inline)) void LCD_SendCommand(enum LCD_Command command) {
    LCD_SendCommandU(command);
}
 
extern void (*LCD_SetDrawingBounds)(unsigned int xstart, unsigned int xend, unsigned int ystart, unsigned int yend);
 
#undef __UCONCAT
#undef _UCONCAT
#undef UCONCAT
 
#ifdef __cplusplus
}
#endif