/**
  ******************************************************************************

  LCD1602.c For STM32F446RE
  Author:   ControllersTech
  Updated:  31st Jan 2020

  ******************************************************************************
  Copyright (C) 2017 ControllersTech.com

  This is a free software under the GNU license, you can redistribute it and/or modify it under the terms
  of the GNU General Public License version 3 as published by the Free Software Foundation.
  This software library is shared with public for educational purposes, without WARRANTY and Author is not liable for any damages caused directly
  or indirectly by this software, read more about this on the GNU General Public License.

  ******************************************************************************
*/

#include "i2c-lcd.h"
#include "i2c.h"
#include "delay.h"

#define SLAVE_ADDRESS_LCD 0x4E // change this according to ur setup


void LCD_Write (uint8_t Address, uint8_t *Data, int size)
{
	I2C_Start ();
	I2C_Address (Address);
	for (int i=0; i<size; i++) I2C_Write (*Data++);
	I2C_Stop ();
}

void lcd_send_cmd (char cmd)
{
  char data_u, data_l;
	uint8_t data_t[4];
	data_u = (cmd&0xf0);
	data_l = ((cmd<<4)&0xf0);
	data_t[0] = data_u|0x0C;  //en=1, rs=0
	data_t[1] = data_u|0x08;  //en=0, rs=0
	data_t[2] = data_l|0x0C;  //en=1, rs=0
	data_t[3] = data_l|0x08;  //en=0, rs=0
	LCD_Write (SLAVE_ADDRESS_LCD,(uint8_t *) data_t, 4);
}

void lcd_send_data (char data)
{
	char data_u, data_l;
	uint8_t data_t[4];
	data_u = (data&0xf0);
	data_l = ((data<<4)&0xf0);
	data_t[0] = data_u|0x0D;  //en=1, rs=0
	data_t[1] = data_u|0x09;  //en=0, rs=0
	data_t[2] = data_l|0x0D;  //en=1, rs=0
	data_t[3] = data_l|0x09;  //en=0, rs=0
	LCD_Write (SLAVE_ADDRESS_LCD,(uint8_t *) data_t, 4);
}

void lcd_clear (void)
{
	lcd_send_cmd (0x80);
	for (int i=0; i<70; i++)
	{
		lcd_send_data (' ');
	}
}

void lcd_put_cur(int row, int col)
{
    switch (row)
    {
        case 0:
            col |= 0x80;
            break;
        case 1:
            col |= 0xC0;
            break;
    }

    lcd_send_cmd (col);
}


void lcd_init (void)
{
	// 4 bit initialisation
	Delay_ms(50);  // wait for >40ms
	lcd_send_cmd (0x30);
	Delay_ms(5);  // wait for >4.1ms
	lcd_send_cmd (0x30);
	Delay_us(150);  // wait for >100us
	lcd_send_cmd (0x30);
	Delay_ms(10);
	lcd_send_cmd (0x20);  // 4bit mode
	Delay_ms(10);

  // display initialisation
    lcd_send_cmd (0x28); // Function set --> DL=0 (4 bit mode), N = 1 (2 line display) F = 0 (5x8 characters)
	Delay_ms(1);
	lcd_send_cmd (0x08); //Display on/off control --> D=0,C=0, B=0  ---> display off
	Delay_ms(1);
	lcd_send_cmd (0x01);  // clear display
	Delay_ms(1);
	Delay_ms(1);
	lcd_send_cmd (0x06); //Entry mode set --> I/D = 1 (increment cursor) & S = 0 (no shift)
	Delay_ms(1);
	lcd_send_cmd (0x0C); //Display on/off control --> D = 1, C and B = 0. (Cursor and blink, last two bits)
}

void lcd_send_string (char *str)
{
	while (*str) lcd_send_data (*str++);
}
/**
  ******************************************************************************

  LCD1602.c For STM32F446RE
  Author:   ControllersTech
  Updated:  31st Jan 2020

  ******************************************************************************
  Copyright (C) 2017 ControllersTech.com

  This is a free software under the GNU license, you can redistribute it and/or modify it under the terms
  of the GNU General Public License version 3 as published by the Free Software Foundation.
  This software library is shared with public for educational purposes, without WARRANTY and Author is not liable for any damages caused directly
  or indirectly by this software, read more about this on the GNU General Public License.

  ******************************************************************************
*/

#include "i2c-lcd.h"
#include "i2c.h"
#include "delay.h"

#define SLAVE_ADDRESS_LCD 0x4E // change this according to ur setup


void LCD_Write (uint8_t Address, uint8_t *Data, int size)
{
	I2C_Start ();
	I2C_Address (Address);
	for (int i=0; i<size; i++) I2C_Write (*Data++);
	I2C_Stop ();
}

void lcd_send_cmd (char cmd)
{
  char data_u, data_l;
	uint8_t data_t[4];
	data_u = (cmd&0xf0);
	data_l = ((cmd<<4)&0xf0);
	data_t[0] = data_u|0x0C;  //en=1, rs=0
	data_t[1] = data_u|0x08;  //en=0, rs=0
	data_t[2] = data_l|0x0C;  //en=1, rs=0
	data_t[3] = data_l|0x08;  //en=0, rs=0
	LCD_Write (SLAVE_ADDRESS_LCD,(uint8_t *) data_t, 4);
}

void lcd_send_data (char data)
{
	char data_u, data_l;
	uint8_t data_t[4];
	data_u = (data&0xf0);
	data_l = ((data<<4)&0xf0);
	data_t[0] = data_u|0x0D;  //en=1, rs=0
	data_t[1] = data_u|0x09;  //en=0, rs=0
	data_t[2] = data_l|0x0D;  //en=1, rs=0
	data_t[3] = data_l|0x09;  //en=0, rs=0
	LCD_Write (SLAVE_ADDRESS_LCD,(uint8_t *) data_t, 4);
}

void lcd_clear (void)
{
	lcd_send_cmd (0x80);
	for (int i=0; i<70; i++)
	{
		lcd_send_data (' ');
	}
}

void lcd_put_cur(int row, int col)
{
    switch (row)
    {
        case 0:
            col |= 0x80;
            break;
        case 1:
            col |= 0xC0;
            break;
    }

    lcd_send_cmd (col);
}


void lcd_init (void)
{
	// 4 bit initialisation
	Delay_ms(50);  // wait for >40ms
	lcd_send_cmd (0x30);
	Delay_ms(5);  // wait for >4.1ms
	lcd_send_cmd (0x30);
	Delay_us(150);  // wait for >100us
	lcd_send_cmd (0x30);
	Delay_ms(10);
	lcd_send_cmd (0x20);  // 4bit mode
	Delay_ms(10);

  // display initialisation
    lcd_send_cmd (0x28); // Function set --> DL=0 (4 bit mode), N = 1 (2 line display) F = 0 (5x8 characters)
	Delay_ms(1);
	lcd_send_cmd (0x08); //Display on/off control --> D=0,C=0, B=0  ---> display off
	Delay_ms(1);
	lcd_send_cmd (0x01);  // clear display
	Delay_ms(1);
	Delay_ms(1);
	lcd_send_cmd (0x06); //Entry mode set --> I/D = 1 (increment cursor) & S = 0 (no shift)
	Delay_ms(1);
	lcd_send_cmd (0x0C); //Display on/off control --> D = 1, C and B = 0. (Cursor and blink, last two bits)
}

void lcd_send_string (char *str)
{
	while (*str) lcd_send_data (*str++);
}