LCD display
Fork of LCDLib by
TextLCD.cpp@3:d2f70de20dbe, 2015-09-20 (annotated)
- Committer:
- rlanghbv
- Date:
- Sun Sep 20 11:06:45 2015 +0000
- Revision:
- 3:d2f70de20dbe
- Parent:
- 2:f0a520c95838
- Child:
- 4:264d9b06bf60
Added constutcor width pin-names
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
rlanghbv | 1:8902f6be12a5 | 1 | /* |
rlanghbv | 1:8902f6be12a5 | 2 | * LCD.c |
rlanghbv | 1:8902f6be12a5 | 3 | * |
rlanghbv | 1:8902f6be12a5 | 4 | * Created: 20.01.2012 13:05:38 |
rlanghbv | 1:8902f6be12a5 | 5 | * Author: rul |
rlanghbv | 1:8902f6be12a5 | 6 | */ |
rlanghbv | 1:8902f6be12a5 | 7 | |
rlanghbv | 1:8902f6be12a5 | 8 | #include "mbed.h" |
rlanghbv | 1:8902f6be12a5 | 9 | #include "TextLCD.h" |
rlanghbv | 1:8902f6be12a5 | 10 | |
rlanghbv | 1:8902f6be12a5 | 11 | #define SET_EN() (LCD_EN=1) |
rlanghbv | 1:8902f6be12a5 | 12 | #define SET_RS() (LCD_RS=1) |
rlanghbv | 1:8902f6be12a5 | 13 | #define SET_RW() (LCD_RW=1) |
rlanghbv | 1:8902f6be12a5 | 14 | |
rlanghbv | 1:8902f6be12a5 | 15 | #define CLEAR_EN() (LCD_EN=0) |
rlanghbv | 1:8902f6be12a5 | 16 | #define CLEAR_RS() (LCD_RS=0) |
rlanghbv | 1:8902f6be12a5 | 17 | #define CLEAR_RW() (LCD_RW=0) |
rlanghbv | 1:8902f6be12a5 | 18 | |
rlanghbv | 1:8902f6be12a5 | 19 | |
rlanghbv | 1:8902f6be12a5 | 20 | //Enables the LCD Module for use 2-Lines... |
rlanghbv | 3:d2f70de20dbe | 21 | /*TextLCD::TextLCD() |
rlanghbv | 3:d2f70de20dbe | 22 | { |
rlanghbv | 3:d2f70de20dbe | 23 | CLEAR_EN(); //EN =0 |
rlanghbv | 3:d2f70de20dbe | 24 | wait_ms(500); |
rlanghbv | 3:d2f70de20dbe | 25 | |
rlanghbv | 3:d2f70de20dbe | 26 | init_4BitMode2LinesDisplayOn(); //enabler 4 bit mode |
rlanghbv | 3:d2f70de20dbe | 27 | wait_us(100); |
rlanghbv | 3:d2f70de20dbe | 28 | |
rlanghbv | 3:d2f70de20dbe | 29 | lcdComand(0x28);//(0b0010 1000); // 4- bit mode LCD 2 line 5x7 Matrix |
rlanghbv | 3:d2f70de20dbe | 30 | wait_us(100); |
rlanghbv | 3:d2f70de20dbe | 31 | lcdComand(0xE);//(0b0000 1110); //Hva gjør vi her ? |
rlanghbv | 3:d2f70de20dbe | 32 | wait_us(100); |
rlanghbv | 3:d2f70de20dbe | 33 | lcdComand(0x01); //(0b00000001); //Hva gjør vi her ? |
rlanghbv | 3:d2f70de20dbe | 34 | wait_us(100); |
rlanghbv | 3:d2f70de20dbe | 35 | lcdComand(0x06);//(0b00000110); //Hva gjør vi her ? |
rlanghbv | 3:d2f70de20dbe | 36 | wait_us(100); |
rlanghbv | 3:d2f70de20dbe | 37 | }*/ |
rlanghbv | 3:d2f70de20dbe | 38 | |
rlanghbv | 3:d2f70de20dbe | 39 | TextLCD::TextLCD(PinName rs,PinName rw, PinName e, PinName d4, PinName d5, |
rlanghbv | 3:d2f70de20dbe | 40 | PinName d6, PinName d7) : LCD_RS(rs),LCD_RW(rw), |
rlanghbv | 3:d2f70de20dbe | 41 | LCD_EN(e), LCD_D4(d4), LCD_D5(d5), LCD_D6(d6), LCD_D7(d7) |
rlanghbv | 1:8902f6be12a5 | 42 | { |
rlanghbv | 1:8902f6be12a5 | 43 | CLEAR_EN(); //EN =0 |
rlanghbv | 1:8902f6be12a5 | 44 | wait_ms(500); |
rlanghbv | 1:8902f6be12a5 | 45 | |
rlanghbv | 1:8902f6be12a5 | 46 | init_4BitMode2LinesDisplayOn(); //enabler 4 bit mode |
rlanghbv | 1:8902f6be12a5 | 47 | wait_us(100); |
rlanghbv | 1:8902f6be12a5 | 48 | |
rlanghbv | 1:8902f6be12a5 | 49 | lcdComand(0x28);//(0b0010 1000); // 4- bit mode LCD 2 line 5x7 Matrix |
rlanghbv | 1:8902f6be12a5 | 50 | wait_us(100); |
rlanghbv | 2:f0a520c95838 | 51 | lcdComand(0xE);//(0b0000 1110); //Hva gjør vi her ? |
rlanghbv | 1:8902f6be12a5 | 52 | wait_us(100); |
rlanghbv | 2:f0a520c95838 | 53 | lcdComand(0x01); //(0b00000001); //Hva gjør vi her ? |
rlanghbv | 1:8902f6be12a5 | 54 | wait_us(100); |
rlanghbv | 2:f0a520c95838 | 55 | lcdComand(0x06);//(0b00000110); //Hva gjør vi her ? |
rlanghbv | 1:8902f6be12a5 | 56 | wait_us(100); |
rlanghbv | 1:8902f6be12a5 | 57 | } |
rlanghbv | 1:8902f6be12a5 | 58 | |
rlanghbv | 1:8902f6be12a5 | 59 | |
rlanghbv | 3:d2f70de20dbe | 60 | |
rlanghbv | 3:d2f70de20dbe | 61 | |
rlanghbv | 3:d2f70de20dbe | 62 | |
rlanghbv | 3:d2f70de20dbe | 63 | |
rlanghbv | 1:8902f6be12a5 | 64 | // Causes the LCD-module to read the data on the data input pins |
rlanghbv | 1:8902f6be12a5 | 65 | void TextLCD::pulseEn() |
rlanghbv | 1:8902f6be12a5 | 66 | { |
rlanghbv | 1:8902f6be12a5 | 67 | SET_EN(); // EN = 1 for L-to-H / |
rlanghbv | 1:8902f6be12a5 | 68 | wait_us(200); |
rlanghbv | 1:8902f6be12a5 | 69 | CLEAR_EN(); // EN = 0 for H-to-L |
rlanghbv | 1:8902f6be12a5 | 70 | } |
rlanghbv | 1:8902f6be12a5 | 71 | |
rlanghbv | 1:8902f6be12a5 | 72 | //Writes the low lible of data to the LCD-module data pins D4 to D7 |
rlanghbv | 1:8902f6be12a5 | 73 | void TextLCD::writeLcdBitD4toD7(char data) |
rlanghbv | 1:8902f6be12a5 | 74 | { |
rlanghbv | 1:8902f6be12a5 | 75 | if ( ( data >> 3) & 0x01) LCD_D7=1; |
rlanghbv | 1:8902f6be12a5 | 76 | else LCD_D7=0; |
rlanghbv | 1:8902f6be12a5 | 77 | if ( ( data >> 2) & 0x01) LCD_D6=1; |
rlanghbv | 1:8902f6be12a5 | 78 | else LCD_D6=0; |
rlanghbv | 1:8902f6be12a5 | 79 | if ( ( data >> 1) & 0x01) LCD_D5=1; |
rlanghbv | 1:8902f6be12a5 | 80 | else LCD_D5=0; |
rlanghbv | 1:8902f6be12a5 | 81 | if ( data & 0x01) LCD_D4=1; |
rlanghbv | 1:8902f6be12a5 | 82 | else LCD_D4=0; |
rlanghbv | 1:8902f6be12a5 | 83 | } |
rlanghbv | 1:8902f6be12a5 | 84 | |
rlanghbv | 1:8902f6be12a5 | 85 | //Enable 4 bit mode From KS0066U Documentation |
rlanghbv | 1:8902f6be12a5 | 86 | void TextLCD::init_4BitMode2LinesDisplayOn() |
rlanghbv | 1:8902f6be12a5 | 87 | { |
rlanghbv | 1:8902f6be12a5 | 88 | //Start by selecting configuration mode |
rlanghbv | 1:8902f6be12a5 | 89 | CLEAR_RS(); |
rlanghbv | 1:8902f6be12a5 | 90 | CLEAR_RW(); |
rlanghbv | 1:8902f6be12a5 | 91 | |
rlanghbv | 1:8902f6be12a5 | 92 | //Enable 4 bit mode From KS0066U Documentation |
rlanghbv | 1:8902f6be12a5 | 93 | writeLcdBitD4toD7(0x2);//(0b0010); // Select 4- bit start |
rlanghbv | 1:8902f6be12a5 | 94 | pulseEn(); //LCD exec function |
rlanghbv | 1:8902f6be12a5 | 95 | wait_us(100); |
rlanghbv | 1:8902f6be12a5 | 96 | |
rlanghbv | 1:8902f6be12a5 | 97 | writeLcdBitD4toD7(0x2);////(0b0010); // Select 4- bit start (Already on the out port no need to write once more ) |
rlanghbv | 1:8902f6be12a5 | 98 | pulseEn(); //LCD exec function |
rlanghbv | 1:8902f6be12a5 | 99 | wait_us(100); |
rlanghbv | 1:8902f6be12a5 | 100 | |
rlanghbv | 1:8902f6be12a5 | 101 | writeLcdBitD4toD7(0xC);//(0b1100); // 2 Lines + Disp On |
rlanghbv | 1:8902f6be12a5 | 102 | pulseEn(); //LCD exec function |
rlanghbv | 1:8902f6be12a5 | 103 | wait_us(100); |
rlanghbv | 1:8902f6be12a5 | 104 | } |
rlanghbv | 1:8902f6be12a5 | 105 | |
rlanghbv | 1:8902f6be12a5 | 106 | |
rlanghbv | 1:8902f6be12a5 | 107 | //Writes the byte comand to the LCD-module using 4 bits mode |
rlanghbv | 1:8902f6be12a5 | 108 | void TextLCD::lcdComand(unsigned char cmd) |
rlanghbv | 1:8902f6be12a5 | 109 | { |
rlanghbv | 1:8902f6be12a5 | 110 | writeLcdBitD4toD7(cmd>>4); //Write the first high cmd nibble |
rlanghbv | 1:8902f6be12a5 | 111 | |
rlanghbv | 1:8902f6be12a5 | 112 | CLEAR_RS(); // RS = 0 for command |
rlanghbv | 1:8902f6be12a5 | 113 | CLEAR_RW(); // RW = 0 for write |
rlanghbv | 1:8902f6be12a5 | 114 | |
rlanghbv | 1:8902f6be12a5 | 115 | pulseEn(); //EN Hi-Lo |
rlanghbv | 1:8902f6be12a5 | 116 | |
rlanghbv | 1:8902f6be12a5 | 117 | writeLcdBitD4toD7(cmd); //Write the second low cmd nibble |
rlanghbv | 1:8902f6be12a5 | 118 | |
rlanghbv | 1:8902f6be12a5 | 119 | pulseEn(); //EN H to Lo |
rlanghbv | 1:8902f6be12a5 | 120 | |
rlanghbv | 1:8902f6be12a5 | 121 | wait_us(100); //wait |
rlanghbv | 1:8902f6be12a5 | 122 | } |
rlanghbv | 1:8902f6be12a5 | 123 | |
rlanghbv | 1:8902f6be12a5 | 124 | void TextLCD::lcdData(unsigned char data) |
rlanghbv | 1:8902f6be12a5 | 125 | { |
rlanghbv | 1:8902f6be12a5 | 126 | writeLcdBitD4toD7(data>>4); //Write the first high data nibble |
rlanghbv | 1:8902f6be12a5 | 127 | |
rlanghbv | 1:8902f6be12a5 | 128 | SET_RS(); // RS = 1 for data |
rlanghbv | 1:8902f6be12a5 | 129 | CLEAR_RW(); // RW = 0 for write |
rlanghbv | 1:8902f6be12a5 | 130 | pulseEn(); // EN H to Lo |
rlanghbv | 1:8902f6be12a5 | 131 | wait_us(100); //wait |
rlanghbv | 1:8902f6be12a5 | 132 | |
rlanghbv | 1:8902f6be12a5 | 133 | writeLcdBitD4toD7(data); |
rlanghbv | 1:8902f6be12a5 | 134 | |
rlanghbv | 1:8902f6be12a5 | 135 | pulseEn(); //EN H to Lo |
rlanghbv | 1:8902f6be12a5 | 136 | wait_us(100); //wait |
rlanghbv | 1:8902f6be12a5 | 137 | } |
rlanghbv | 1:8902f6be12a5 | 138 | |
rlanghbv | 1:8902f6be12a5 | 139 | |
rlanghbv | 1:8902f6be12a5 | 140 | |
rlanghbv | 1:8902f6be12a5 | 141 | //Moves cursor to the X,Y position |
rlanghbv | 2:f0a520c95838 | 142 | void TextLCD::gotoxy(int x, int y) |
rlanghbv | 1:8902f6be12a5 | 143 | { |
rlanghbv | 1:8902f6be12a5 | 144 | unsigned char firstCharAdr[]= { 0x80,0xc0,0x94,0xD4}; |
rlanghbv | 1:8902f6be12a5 | 145 | lcdComand(firstCharAdr[y-1]+ x -1); |
rlanghbv | 1:8902f6be12a5 | 146 | |
rlanghbv | 1:8902f6be12a5 | 147 | wait_us(100); |
rlanghbv | 1:8902f6be12a5 | 148 | } |
rlanghbv | 1:8902f6be12a5 | 149 | |
rlanghbv | 1:8902f6be12a5 | 150 | int TextLCD::_putc(int value) |
rlanghbv | 1:8902f6be12a5 | 151 | { |
rlanghbv | 1:8902f6be12a5 | 152 | lcdData(value); |
rlanghbv | 1:8902f6be12a5 | 153 | return value; |
rlanghbv | 1:8902f6be12a5 | 154 | } |
rlanghbv | 1:8902f6be12a5 | 155 | |
rlanghbv | 1:8902f6be12a5 | 156 | int TextLCD::_getc() { |
rlanghbv | 1:8902f6be12a5 | 157 | return -1; |
rlanghbv | 1:8902f6be12a5 | 158 | } |
rlanghbv | 1:8902f6be12a5 | 159 | |
rlanghbv | 1:8902f6be12a5 | 160 | //Writes a string to the LCD Display |
rlanghbv | 1:8902f6be12a5 | 161 | void TextLCD::lcd_print(char *str) |
rlanghbv | 1:8902f6be12a5 | 162 | { |
rlanghbv | 1:8902f6be12a5 | 163 | unsigned char i =0; |
rlanghbv | 1:8902f6be12a5 | 164 | while(str[i] !=0) { |
rlanghbv | 1:8902f6be12a5 | 165 | lcdData(str[i]); |
rlanghbv | 1:8902f6be12a5 | 166 | i++; |
rlanghbv | 1:8902f6be12a5 | 167 | } |
rlanghbv | 1:8902f6be12a5 | 168 | } |