LCD display
Fork of LCDLib by
TextLCD.cpp@5:d9eb6ed84a06, 2015-09-20 (annotated)
- Committer:
- rlanghbv
- Date:
- Sun Sep 20 12:01:04 2015 +0000
- Revision:
- 5:d9eb6ed84a06
- Parent:
- 4:264d9b06bf60
- Child:
- 8:b12188ddd403
Code cleanup
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 | 4:264d9b06bf60 | 15 | PinName d6, PinName d7) : LCD_RS(rs),LCD_RW(rw), |
rlanghbv | 4:264d9b06bf60 | 16 | LCD_EN(e), LCD_D4(d4), LCD_D5(d5), LCD_D6(d6), LCD_D7(d7) |
rlanghbv | 3:d2f70de20dbe | 17 | { |
rlanghbv | 4:264d9b06bf60 | 18 | |
rlanghbv | 4:264d9b06bf60 | 19 | CLEAR_RW(); |
rlanghbv | 4:264d9b06bf60 | 20 | wait_ms(50); // Wait for disp to turn on |
rlanghbv | 4:264d9b06bf60 | 21 | |
rlanghbv | 3:d2f70de20dbe | 22 | CLEAR_EN(); //EN =0 |
rlanghbv | 4:264d9b06bf60 | 23 | CLEAR_RS(); |
rlanghbv | 3:d2f70de20dbe | 24 | |
rlanghbv | 4:264d9b06bf60 | 25 | init_4BitMode2LinesDisplayOn(); //enabler 4 bit mode |
rlanghbv | 4:264d9b06bf60 | 26 | wait_ms(1); |
rlanghbv | 4:264d9b06bf60 | 27 | |
rlanghbv | 4:264d9b06bf60 | 28 | lcdComand(0x00); |
rlanghbv | 3:d2f70de20dbe | 29 | wait_us(100); |
rlanghbv | 3:d2f70de20dbe | 30 | |
rlanghbv | 4:264d9b06bf60 | 31 | lcdComand(0x28);//(0b0010 1000); // 4- bit mode LCD 2 line 16x2 Matrix |
rlanghbv | 3:d2f70de20dbe | 32 | wait_us(100); |
rlanghbv | 4:264d9b06bf60 | 33 | |
rlanghbv | 4:264d9b06bf60 | 34 | lcdComand(0xE);//(0b0000 1110); // Hva gjør vi her ? |
rlanghbv | 3:d2f70de20dbe | 35 | wait_us(100); |
rlanghbv | 3:d2f70de20dbe | 36 | lcdComand(0x01); //(0b00000001); //Hva gjør vi her ? |
rlanghbv | 3:d2f70de20dbe | 37 | wait_us(100); |
rlanghbv | 3:d2f70de20dbe | 38 | lcdComand(0x06);//(0b00000110); //Hva gjør vi her ? |
rlanghbv | 3:d2f70de20dbe | 39 | wait_us(100); |
rlanghbv | 3:d2f70de20dbe | 40 | |
rlanghbv | 1:8902f6be12a5 | 41 | } |
rlanghbv | 1:8902f6be12a5 | 42 | |
rlanghbv | 1:8902f6be12a5 | 43 | |
rlanghbv | 1:8902f6be12a5 | 44 | // Causes the LCD-module to read the data on the data input pins |
rlanghbv | 1:8902f6be12a5 | 45 | void TextLCD::pulseEn() |
rlanghbv | 1:8902f6be12a5 | 46 | { |
rlanghbv | 1:8902f6be12a5 | 47 | SET_EN(); // EN = 1 for L-to-H / |
rlanghbv | 1:8902f6be12a5 | 48 | wait_us(200); |
rlanghbv | 1:8902f6be12a5 | 49 | CLEAR_EN(); // EN = 0 for H-to-L |
rlanghbv | 1:8902f6be12a5 | 50 | } |
rlanghbv | 1:8902f6be12a5 | 51 | |
rlanghbv | 1:8902f6be12a5 | 52 | //Writes the low lible of data to the LCD-module data pins D4 to D7 |
rlanghbv | 1:8902f6be12a5 | 53 | void TextLCD::writeLcdBitD4toD7(char data) |
rlanghbv | 1:8902f6be12a5 | 54 | { |
rlanghbv | 1:8902f6be12a5 | 55 | if ( ( data >> 3) & 0x01) LCD_D7=1; |
rlanghbv | 1:8902f6be12a5 | 56 | else LCD_D7=0; |
rlanghbv | 1:8902f6be12a5 | 57 | if ( ( data >> 2) & 0x01) LCD_D6=1; |
rlanghbv | 1:8902f6be12a5 | 58 | else LCD_D6=0; |
rlanghbv | 1:8902f6be12a5 | 59 | if ( ( data >> 1) & 0x01) LCD_D5=1; |
rlanghbv | 1:8902f6be12a5 | 60 | else LCD_D5=0; |
rlanghbv | 1:8902f6be12a5 | 61 | if ( data & 0x01) LCD_D4=1; |
rlanghbv | 1:8902f6be12a5 | 62 | else LCD_D4=0; |
rlanghbv | 1:8902f6be12a5 | 63 | } |
rlanghbv | 1:8902f6be12a5 | 64 | |
rlanghbv | 1:8902f6be12a5 | 65 | //Enable 4 bit mode From KS0066U Documentation |
rlanghbv | 1:8902f6be12a5 | 66 | void TextLCD::init_4BitMode2LinesDisplayOn() |
rlanghbv | 1:8902f6be12a5 | 67 | { |
rlanghbv | 1:8902f6be12a5 | 68 | //Start by selecting configuration mode |
rlanghbv | 1:8902f6be12a5 | 69 | CLEAR_RS(); |
rlanghbv | 1:8902f6be12a5 | 70 | CLEAR_RW(); |
rlanghbv | 1:8902f6be12a5 | 71 | |
rlanghbv | 4:264d9b06bf60 | 72 | // send "Display Settings" 3 times (Only top nibble of 0x30 as we've got 4-bit bus) |
rlanghbv | 4:264d9b06bf60 | 73 | writeLcdBitD4toD7(0x3); |
rlanghbv | 4:264d9b06bf60 | 74 | pulseEn(); |
rlanghbv | 4:264d9b06bf60 | 75 | wait_ms(2); |
rlanghbv | 4:264d9b06bf60 | 76 | writeLcdBitD4toD7(0x3); |
rlanghbv | 4:264d9b06bf60 | 77 | pulseEn(); |
rlanghbv | 4:264d9b06bf60 | 78 | wait_ms(2); |
rlanghbv | 4:264d9b06bf60 | 79 | writeLcdBitD4toD7(0x3); |
rlanghbv | 4:264d9b06bf60 | 80 | pulseEn(); |
rlanghbv | 4:264d9b06bf60 | 81 | wait_ms(2); |
rlanghbv | 4:264d9b06bf60 | 82 | |
rlanghbv | 1:8902f6be12a5 | 83 | //Enable 4 bit mode From KS0066U Documentation |
rlanghbv | 1:8902f6be12a5 | 84 | writeLcdBitD4toD7(0x2);//(0b0010); // Select 4- bit start |
rlanghbv | 1:8902f6be12a5 | 85 | pulseEn(); //LCD exec function |
rlanghbv | 1:8902f6be12a5 | 86 | wait_us(100); |
rlanghbv | 1:8902f6be12a5 | 87 | |
rlanghbv | 1:8902f6be12a5 | 88 | writeLcdBitD4toD7(0x2);////(0b0010); // Select 4- bit start (Already on the out port no need to write once more ) |
rlanghbv | 1:8902f6be12a5 | 89 | pulseEn(); //LCD exec function |
rlanghbv | 1:8902f6be12a5 | 90 | wait_us(100); |
rlanghbv | 1:8902f6be12a5 | 91 | |
rlanghbv | 1:8902f6be12a5 | 92 | writeLcdBitD4toD7(0xC);//(0b1100); // 2 Lines + Disp On |
rlanghbv | 1:8902f6be12a5 | 93 | pulseEn(); //LCD exec function |
rlanghbv | 1:8902f6be12a5 | 94 | wait_us(100); |
rlanghbv | 1:8902f6be12a5 | 95 | } |
rlanghbv | 1:8902f6be12a5 | 96 | |
rlanghbv | 1:8902f6be12a5 | 97 | |
rlanghbv | 1:8902f6be12a5 | 98 | //Writes the byte comand to the LCD-module using 4 bits mode |
rlanghbv | 1:8902f6be12a5 | 99 | void TextLCD::lcdComand(unsigned char cmd) |
rlanghbv | 1:8902f6be12a5 | 100 | { |
rlanghbv | 1:8902f6be12a5 | 101 | writeLcdBitD4toD7(cmd>>4); //Write the first high cmd nibble |
rlanghbv | 1:8902f6be12a5 | 102 | |
rlanghbv | 1:8902f6be12a5 | 103 | CLEAR_RS(); // RS = 0 for command |
rlanghbv | 1:8902f6be12a5 | 104 | CLEAR_RW(); // RW = 0 for write |
rlanghbv | 1:8902f6be12a5 | 105 | |
rlanghbv | 1:8902f6be12a5 | 106 | pulseEn(); //EN Hi-Lo |
rlanghbv | 1:8902f6be12a5 | 107 | |
rlanghbv | 1:8902f6be12a5 | 108 | writeLcdBitD4toD7(cmd); //Write the second low cmd nibble |
rlanghbv | 1:8902f6be12a5 | 109 | |
rlanghbv | 1:8902f6be12a5 | 110 | pulseEn(); //EN H to Lo |
rlanghbv | 1:8902f6be12a5 | 111 | |
rlanghbv | 1:8902f6be12a5 | 112 | wait_us(100); //wait |
rlanghbv | 1:8902f6be12a5 | 113 | } |
rlanghbv | 1:8902f6be12a5 | 114 | |
rlanghbv | 1:8902f6be12a5 | 115 | void TextLCD::lcdData(unsigned char data) |
rlanghbv | 1:8902f6be12a5 | 116 | { |
rlanghbv | 1:8902f6be12a5 | 117 | writeLcdBitD4toD7(data>>4); //Write the first high data nibble |
rlanghbv | 1:8902f6be12a5 | 118 | |
rlanghbv | 1:8902f6be12a5 | 119 | SET_RS(); // RS = 1 for data |
rlanghbv | 1:8902f6be12a5 | 120 | CLEAR_RW(); // RW = 0 for write |
rlanghbv | 1:8902f6be12a5 | 121 | pulseEn(); // EN H to Lo |
rlanghbv | 1:8902f6be12a5 | 122 | wait_us(100); //wait |
rlanghbv | 1:8902f6be12a5 | 123 | |
rlanghbv | 1:8902f6be12a5 | 124 | writeLcdBitD4toD7(data); |
rlanghbv | 1:8902f6be12a5 | 125 | |
rlanghbv | 1:8902f6be12a5 | 126 | pulseEn(); //EN H to Lo |
rlanghbv | 1:8902f6be12a5 | 127 | wait_us(100); //wait |
rlanghbv | 1:8902f6be12a5 | 128 | } |
rlanghbv | 1:8902f6be12a5 | 129 | |
rlanghbv | 1:8902f6be12a5 | 130 | //Moves cursor to the X,Y position |
rlanghbv | 2:f0a520c95838 | 131 | void TextLCD::gotoxy(int x, int y) |
rlanghbv | 1:8902f6be12a5 | 132 | { |
rlanghbv | 1:8902f6be12a5 | 133 | unsigned char firstCharAdr[]= { 0x80,0xc0,0x94,0xD4}; |
rlanghbv | 1:8902f6be12a5 | 134 | lcdComand(firstCharAdr[y-1]+ x -1); |
rlanghbv | 1:8902f6be12a5 | 135 | |
rlanghbv | 1:8902f6be12a5 | 136 | wait_us(100); |
rlanghbv | 1:8902f6be12a5 | 137 | } |
rlanghbv | 1:8902f6be12a5 | 138 | |
rlanghbv | 1:8902f6be12a5 | 139 | int TextLCD::_putc(int value) |
rlanghbv | 1:8902f6be12a5 | 140 | { |
rlanghbv | 1:8902f6be12a5 | 141 | lcdData(value); |
rlanghbv | 1:8902f6be12a5 | 142 | return value; |
rlanghbv | 1:8902f6be12a5 | 143 | } |
rlanghbv | 1:8902f6be12a5 | 144 | |
rlanghbv | 4:264d9b06bf60 | 145 | int TextLCD::_getc() |
rlanghbv | 1:8902f6be12a5 | 146 | { |
rlanghbv | 4:264d9b06bf60 | 147 | return -1; |
rlanghbv | 1:8902f6be12a5 | 148 | } |