These functions handle the byte communication between pictor and the display.

inline void pictorCmdWrite(const uint8_t Cmd);

Sends a command byte to the screen.

Parameters:

1. Cmd - The 8-bit command byte for the screen (see ILI9341 datasheet).

inline void pictorByteWrite(const uint8_t Data);

Sends a data byte to the screen.

Parameters:

1. Data - The 8-bit data byte.

inline void pictorWordWrite(uint16_t Value);

Sends two data bytes to the screen.

Parameters:

1. Value - The 16-bit data word.

inline uint8_t pictorByteRead();

Returns a data byte read from the screen.

Return Value:

• 8-bit data byte from the screen.

inline uint16_t pictorWordRead();

Returns a word from two data bytes read from the screen.

Return Value:

• 16-bit data word from the screen.

void pictorBacklightState(const int8_t State);

Sets the state of the backlight.

Parameters:

1. State - Backlight state (1 = ON, 0 = OFF, -1 = TOGGLE).

void pictorFrame();

Toggles the VSYNC pin to update the screen in VSYNC mode.

Note:

• Exceeding 84Hz will not draw the bottom of the screen replacing it with a white stripe.
• Refreshing the screen at below 30Hz will cause visible flickering in blocks of colour,
• Refreshing at below 5Hz will cause the screen to begin to fade to white in between frames.