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/*
* @file display.h
* Display library for ILI9481 display
*
* Copyright (C) 2018 Clyne Sullivan
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef DISPLAY_H_
#define DISPLAY_H_
#include <stdint.h>
/**
* The screen's width, in pixels.
*/
#define LCD_WIDTH 480
/**
* The screen's height, in pixels.
*/
#define LCD_HEIGHT 320
/**
* Initializes the display. Must be called before other display use.
*/
void dsp_init(void);
/**
* Returns the color integer for the given RGB values.
* Converts 8RGB to 5-6-5.
* @param r red value, 0-255
* @param g green value, 0-255
* @param b blue value, 0-255
* @return the 5-6-5 color value
*/
uint16_t dsp_color(uint8_t r, uint8_t g, uint8_t b);
/**
* Sets the direction of IO, for reading or writing to the screen.
* @param mode INPUT or OUPUT (defined in gpio.h)
*/
void dsp_dmode(int mode);
/**
* Writes the command byte to the display.
* @param data the command to write
*/
void dsp_write_cmd(uint8_t data);
/**
* Writes the data byte to the display.
* @param data the data to write
*/
void dsp_write_data(uint8_t data);
/**
* Reads a byte of data from the display.
* @return the data byte
*/
uint8_t dsp_read_data(void);
/**
* Selects the area of pixels to draw to, from (x1, y1) inclusive to (x2, y2)
* exclusive.
* @param x1 starting x coordinate
* @param y1 starting y coordinate
* @param x2 ending x coordinate
* @param y2 ending y coordinate
*/
void dsp_set_addr(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2);
/**
* Selects the area of pixels to read from, in the range (x1, y1) inclusive to
* (x2, y2) exclusive.
* @param x1 starting x coordinate
* @param y1 starting y coordinate
* @param x2 ending x coordinate
* @param y2 ending y coordinate
*/
void dsp_set_addr_read(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2);
void dsp_sleep(void);
void dsp_wakeup(void);
#endif // DISPLAY_H_
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