/* Reflow Oven Controller
*
* Copyright (C) 2020  Mario Hüttel <mario.huettel@gmx.net>
*
* This file is part of the Reflow Oven Controller Project.
*
* The reflow oven controller is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* The Reflow Oven Control Firmware 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 the reflow oven controller project.
* If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef __LCD_H__
#define __LCD_H__

#include <stdint.h>

#define LCD_DPORT		(GPIOD)
#define LCD_RCC_MASK		RCC_AHB1ENR_GPIODEN
#define LCD_DATA_BIT_OFFSET	(8)
#define LCD_RS			(6)
#define LCD_E			(7)

#define LCD_DATA_MASK		(0xFU << LCD_DATA_BIT_OFFSET)
#define	LCD_RS_MASK		(1U << LCD_RS)
#define	LCD_E_MASK		(1U << LCD_E)



#define LCD_CHAR_WIDTH 16
#define LCD_ROW_COUNT 4

#define LCD_SHIMATTA_STRING "\xBC\xCF\xAF\xC0"
#define LCD_DEGREE_SYMBOL_STRING "\xDF"
#define LCD_DEGREE_SYMBOL_CHAR '\xDF'
#define LCD_OHM_SYMBOL_CHAR '\xF4'
#define LCD_OHM_SYMBOL_STRING "\xF4"

enum lcd_fsm_ret {LCD_FSM_NOP, LCD_FSM_CALL_AGAIN, LCD_FSM_WAIT_CALL};

void lcd_init(void);

void lcd_string(const char *data);

void lcd_setcursor(uint8_t x, uint8_t y);

void lcd_home(void);

enum lcd_fsm_ret lcd_fsm_write_buffer(const char (*display_buffer)[21]);

#endif /* __LCD_H__ */