82 lines
2.2 KiB
C
82 lines
2.2 KiB
C
/*
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* File: lcd.c
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* Author: pascal.sartoret
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*
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* Created on 16. décembre 2020, 14:04
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*/
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#define _XTAL_FREQ 25000000L
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#include <xc.h>
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#include <string.h>
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#include "lcd.h"
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#include "ssd1963_cmd.h"
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int8_t Lcd_Init(void)
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{
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//--------------------------------------------------------------------------
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// define GPIO for LCD
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DIR_LCD_RS = 0; // RS is an output
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LCD_RS = 0; // command mode
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DIR_LCD_CS = 0; // chip select is an output
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LCD_CS = 0; // do not select the LCD
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LCD_DATA_L_DIR = LCD_DATA_L_DIR & 0x0F; // data port is 4 bits output
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__delay_ms(200); // power on delay
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LCD_2x16_WriteCmd(0x02);
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LCD_2x16_WriteCmd(0x28);
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// LCD_2x16_WriteCmd(0x2B);
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// LCD_2x16_WriteCmd(0x2B);
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LCD_2x16_WriteCmd(0x01); // clear display
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LCD_2x16_WriteCmd(0x0C);
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// LCD_2x16_WriteCmd(0x14);
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// __delay_ms(2);
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LCD_2x16_WriteCmd(0x06);
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// __delay_ms(100);
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return 0;
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}
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void LCD_2x16_WriteCmd(uint8_t command)
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{
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LCD_RS = 0; // command mode
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LCD_DATA_L = (command & 0xF0) | (LCD_DATA_L & 0x0F); // bits to set
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LCD_CS = 1; // chip select
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__delay_us(10);
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LCD_CS = 0; // chip deselect
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__delay_us(1);
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command = command << 4;
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LCD_DATA_L = (command & 0xF0) | (LCD_DATA_L & 0x0F); // bits to set
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LCD_CS = 1; // chip select
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__delay_us(10);
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LCD_CS = 0; // chip deselect
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__delay_ms(3);
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}
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void LCD_2x16_WriteData(uint8_t command)
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{
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LCD_RS = 1; // command mode
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LCD_DATA_L = (command & 0xF0) | (LCD_DATA_L & 0x0F); // bits to set
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LCD_CS = 1; // chip select
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__delay_us(1);
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LCD_CS = 0; // chip deselect
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__delay_us(1);
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command = command << 4;
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LCD_DATA_L = (command & 0xF0) | (LCD_DATA_L & 0x0F); // bits to set
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LCD_CS = 1; // chip select
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__delay_us(1);
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LCD_CS = 0; // chip deselect
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__delay_us(100);
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}
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void LCD_2x16_WriteMsg(unsigned char * msg, uint8_t line)
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{
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LCD_2x16_WriteCmd(0x80 | (line << 6));
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do
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{
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LCD_2x16_WriteData(*msg);
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msg++;
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}while(*msg != 0);
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} |