LCD display
Fork of LCDLib by
TextLCD.cpp@8:b12188ddd403, 2015-09-20 (annotated)
- Committer:
- rlanghbv
- Date:
- Sun Sep 20 15:55:57 2015 +0000
- Revision:
- 8:b12188ddd403
- Parent:
- 5:d9eb6ed84a06
- Child:
- 9:9529e943259c
Code cleanup DigitalOut replaced by BusOut
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
rlanghbv | 1:8902f6be12a5 | 1 | |
rlanghbv | 1:8902f6be12a5 | 2 | #include "mbed.h" |
rlanghbv | 1:8902f6be12a5 | 3 | #include "TextLCD.h" |
rlanghbv | 1:8902f6be12a5 | 4 | |
rlanghbv | 1:8902f6be12a5 | 5 | #define SET_EN() (LCD_EN=1) |
rlanghbv | 1:8902f6be12a5 | 6 | #define SET_RS() (LCD_RS=1) |
rlanghbv | 1:8902f6be12a5 | 7 | #define SET_RW() (LCD_RW=1) |
rlanghbv | 1:8902f6be12a5 | 8 | |
rlanghbv | 1:8902f6be12a5 | 9 | #define CLEAR_EN() (LCD_EN=0) |
rlanghbv | 1:8902f6be12a5 | 10 | #define CLEAR_RS() (LCD_RS=0) |
rlanghbv | 1:8902f6be12a5 | 11 | #define CLEAR_RW() (LCD_RW=0) |
rlanghbv | 1:8902f6be12a5 | 12 | |
rlanghbv | 1:8902f6be12a5 | 13 | |
rlanghbv | 4:264d9b06bf60 | 14 | TextLCD::TextLCD(PinName rs,PinName rw, PinName e, PinName d4, PinName d5, |
rlanghbv | 8:b12188ddd403 | 15 | PinName d6, PinName d7) : LCD_RS(rs),LCD_RW(rw), LCD_EN(e), |
rlanghbv | 8:b12188ddd403 | 16 | LCD_D4to7(d4,d5,d6,d7) |
rlanghbv | 3:d2f70de20dbe | 17 | { |
rlanghbv | 4:264d9b06bf60 | 18 | CLEAR_RW(); |
rlanghbv | 4:264d9b06bf60 | 19 | wait_ms(50); // Wait for disp to turn on |
rlanghbv | 4:264d9b06bf60 | 20 | |
rlanghbv | 3:d2f70de20dbe | 21 | CLEAR_EN(); //EN =0 |
rlanghbv | 4:264d9b06bf60 | 22 | CLEAR_RS(); |
rlanghbv | 3:d2f70de20dbe | 23 | |
rlanghbv | 4:264d9b06bf60 | 24 | init_4BitMode2LinesDisplayOn(); //enabler 4 bit mode |
rlanghbv | 4:264d9b06bf60 | 25 | wait_ms(1); |
rlanghbv | 4:264d9b06bf60 | 26 | |
rlanghbv | 4:264d9b06bf60 | 27 | lcdComand(0x00); |
rlanghbv | 3:d2f70de20dbe | 28 | wait_us(100); |
rlanghbv | 3:d2f70de20dbe | 29 | |
rlanghbv | 4:264d9b06bf60 | 30 | lcdComand(0x28);//(0b0010 1000); // 4- bit mode LCD 2 line 16x2 Matrix |
rlanghbv | 3:d2f70de20dbe | 31 | wait_us(100); |
rlanghbv | 4:264d9b06bf60 | 32 | |
rlanghbv | 8:b12188ddd403 | 33 | lcdComand(0xE);//(0b0000 1110); |
rlanghbv | 3:d2f70de20dbe | 34 | wait_us(100); |
rlanghbv | 8:b12188ddd403 | 35 | lcdComand(0x01); //(0b00000001); |
rlanghbv | 3:d2f70de20dbe | 36 | wait_us(100); |
rlanghbv | 8:b12188ddd403 | 37 | lcdComand(0x06);//(0b00000110); |
rlanghbv | 3:d2f70de20dbe | 38 | wait_us(100); |
rlanghbv | 1:8902f6be12a5 | 39 | } |
rlanghbv | 1:8902f6be12a5 | 40 | |
rlanghbv | 1:8902f6be12a5 | 41 | // Causes the LCD-module to read the data on the data input pins |
rlanghbv | 1:8902f6be12a5 | 42 | void TextLCD::pulseEn() |
rlanghbv | 1:8902f6be12a5 | 43 | { |
rlanghbv | 1:8902f6be12a5 | 44 | SET_EN(); // EN = 1 for L-to-H / |
rlanghbv | 1:8902f6be12a5 | 45 | wait_us(200); |
rlanghbv | 1:8902f6be12a5 | 46 | CLEAR_EN(); // EN = 0 for H-to-L |
rlanghbv | 1:8902f6be12a5 | 47 | } |
rlanghbv | 1:8902f6be12a5 | 48 | |
rlanghbv | 1:8902f6be12a5 | 49 | //Writes the low lible of data to the LCD-module data pins D4 to D7 |
rlanghbv | 1:8902f6be12a5 | 50 | void TextLCD::writeLcdBitD4toD7(char data) |
rlanghbv | 1:8902f6be12a5 | 51 | { |
rlanghbv | 8:b12188ddd403 | 52 | LCD_D4to7=data; |
rlanghbv | 1:8902f6be12a5 | 53 | } |
rlanghbv | 1:8902f6be12a5 | 54 | |
rlanghbv | 1:8902f6be12a5 | 55 | //Enable 4 bit mode From KS0066U Documentation |
rlanghbv | 1:8902f6be12a5 | 56 | void TextLCD::init_4BitMode2LinesDisplayOn() |
rlanghbv | 1:8902f6be12a5 | 57 | { |
rlanghbv | 1:8902f6be12a5 | 58 | //Start by selecting configuration mode |
rlanghbv | 1:8902f6be12a5 | 59 | CLEAR_RS(); |
rlanghbv | 1:8902f6be12a5 | 60 | CLEAR_RW(); |
rlanghbv | 1:8902f6be12a5 | 61 | |
rlanghbv | 4:264d9b06bf60 | 62 | // send "Display Settings" 3 times (Only top nibble of 0x30 as we've got 4-bit bus) |
rlanghbv | 4:264d9b06bf60 | 63 | writeLcdBitD4toD7(0x3); |
rlanghbv | 4:264d9b06bf60 | 64 | pulseEn(); |
rlanghbv | 4:264d9b06bf60 | 65 | wait_ms(2); |
rlanghbv | 4:264d9b06bf60 | 66 | writeLcdBitD4toD7(0x3); |
rlanghbv | 4:264d9b06bf60 | 67 | pulseEn(); |
rlanghbv | 4:264d9b06bf60 | 68 | wait_ms(2); |
rlanghbv | 4:264d9b06bf60 | 69 | writeLcdBitD4toD7(0x3); |
rlanghbv | 4:264d9b06bf60 | 70 | pulseEn(); |
rlanghbv | 4:264d9b06bf60 | 71 | wait_ms(2); |
rlanghbv | 4:264d9b06bf60 | 72 | |
rlanghbv | 1:8902f6be12a5 | 73 | //Enable 4 bit mode From KS0066U Documentation |
rlanghbv | 1:8902f6be12a5 | 74 | writeLcdBitD4toD7(0x2);//(0b0010); // Select 4- bit start |
rlanghbv | 1:8902f6be12a5 | 75 | pulseEn(); //LCD exec function |
rlanghbv | 1:8902f6be12a5 | 76 | wait_us(100); |
rlanghbv | 1:8902f6be12a5 | 77 | |
rlanghbv | 1:8902f6be12a5 | 78 | writeLcdBitD4toD7(0x2);////(0b0010); // Select 4- bit start (Already on the out port no need to write once more ) |
rlanghbv | 1:8902f6be12a5 | 79 | pulseEn(); //LCD exec function |
rlanghbv | 1:8902f6be12a5 | 80 | wait_us(100); |
rlanghbv | 1:8902f6be12a5 | 81 | |
rlanghbv | 1:8902f6be12a5 | 82 | writeLcdBitD4toD7(0xC);//(0b1100); // 2 Lines + Disp On |
rlanghbv | 1:8902f6be12a5 | 83 | pulseEn(); //LCD exec function |
rlanghbv | 1:8902f6be12a5 | 84 | wait_us(100); |
rlanghbv | 1:8902f6be12a5 | 85 | } |
rlanghbv | 1:8902f6be12a5 | 86 | |
rlanghbv | 1:8902f6be12a5 | 87 | |
rlanghbv | 1:8902f6be12a5 | 88 | //Writes the byte comand to the LCD-module using 4 bits mode |
rlanghbv | 1:8902f6be12a5 | 89 | void TextLCD::lcdComand(unsigned char cmd) |
rlanghbv | 1:8902f6be12a5 | 90 | { |
rlanghbv | 1:8902f6be12a5 | 91 | writeLcdBitD4toD7(cmd>>4); //Write the first high cmd nibble |
rlanghbv | 1:8902f6be12a5 | 92 | |
rlanghbv | 1:8902f6be12a5 | 93 | CLEAR_RS(); // RS = 0 for command |
rlanghbv | 1:8902f6be12a5 | 94 | CLEAR_RW(); // RW = 0 for write |
rlanghbv | 1:8902f6be12a5 | 95 | |
rlanghbv | 1:8902f6be12a5 | 96 | pulseEn(); //EN Hi-Lo |
rlanghbv | 1:8902f6be12a5 | 97 | |
rlanghbv | 1:8902f6be12a5 | 98 | writeLcdBitD4toD7(cmd); //Write the second low cmd nibble |
rlanghbv | 1:8902f6be12a5 | 99 | |
rlanghbv | 1:8902f6be12a5 | 100 | pulseEn(); //EN H to Lo |
rlanghbv | 1:8902f6be12a5 | 101 | |
rlanghbv | 1:8902f6be12a5 | 102 | wait_us(100); //wait |
rlanghbv | 1:8902f6be12a5 | 103 | } |
rlanghbv | 1:8902f6be12a5 | 104 | |
rlanghbv | 1:8902f6be12a5 | 105 | void TextLCD::lcdData(unsigned char data) |
rlanghbv | 1:8902f6be12a5 | 106 | { |
rlanghbv | 1:8902f6be12a5 | 107 | writeLcdBitD4toD7(data>>4); //Write the first high data nibble |
rlanghbv | 1:8902f6be12a5 | 108 | |
rlanghbv | 1:8902f6be12a5 | 109 | SET_RS(); // RS = 1 for data |
rlanghbv | 1:8902f6be12a5 | 110 | CLEAR_RW(); // RW = 0 for write |
rlanghbv | 1:8902f6be12a5 | 111 | pulseEn(); // EN H to Lo |
rlanghbv | 1:8902f6be12a5 | 112 | wait_us(100); //wait |
rlanghbv | 1:8902f6be12a5 | 113 | |
rlanghbv | 1:8902f6be12a5 | 114 | writeLcdBitD4toD7(data); |
rlanghbv | 1:8902f6be12a5 | 115 | |
rlanghbv | 1:8902f6be12a5 | 116 | pulseEn(); //EN H to Lo |
rlanghbv | 1:8902f6be12a5 | 117 | wait_us(100); //wait |
rlanghbv | 1:8902f6be12a5 | 118 | } |
rlanghbv | 1:8902f6be12a5 | 119 | |
rlanghbv | 1:8902f6be12a5 | 120 | //Moves cursor to the X,Y position |
rlanghbv | 2:f0a520c95838 | 121 | void TextLCD::gotoxy(int x, int y) |
rlanghbv | 1:8902f6be12a5 | 122 | { |
rlanghbv | 1:8902f6be12a5 | 123 | unsigned char firstCharAdr[]= { 0x80,0xc0,0x94,0xD4}; |
rlanghbv | 1:8902f6be12a5 | 124 | lcdComand(firstCharAdr[y-1]+ x -1); |
rlanghbv | 1:8902f6be12a5 | 125 | |
rlanghbv | 1:8902f6be12a5 | 126 | wait_us(100); |
rlanghbv | 1:8902f6be12a5 | 127 | } |
rlanghbv | 1:8902f6be12a5 | 128 | |
rlanghbv | 1:8902f6be12a5 | 129 | int TextLCD::_putc(int value) |
rlanghbv | 1:8902f6be12a5 | 130 | { |
rlanghbv | 1:8902f6be12a5 | 131 | lcdData(value); |
rlanghbv | 1:8902f6be12a5 | 132 | return value; |
rlanghbv | 1:8902f6be12a5 | 133 | } |
rlanghbv | 1:8902f6be12a5 | 134 | |
rlanghbv | 4:264d9b06bf60 | 135 | int TextLCD::_getc() |
rlanghbv | 1:8902f6be12a5 | 136 | { |
rlanghbv | 4:264d9b06bf60 | 137 | return -1; |
rlanghbv | 1:8902f6be12a5 | 138 | } |