// #include "oswald_hal.h"
+void oswald_draw_bitmap(const uint8_t xstart, const uint8_t ystart, const uint8_t width, const uint8_t height, const void *bmp);
void DrawLcdLineBresenham(u8t xstart, u8t ystart, u8t xend, u8t yend);
void DrawLcdLineBresenhamWW(u8t xstart, u8t ystart, u8t xend, u8t yend, u8t thickness);
u8t WriteLcdCharacter(u8t x, u8t y, u8t Character);