Ben Gordon / Mbed OS ELEC351_GroupA-branch1

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

LCD.cpp@12:edf31d0a61f0, 2018-11-08 (annotated)

Committer:
BenRJG
Date:
Thu Nov 08 21:43:49 2018 +0000
Revision:
12:edf31d0a61f0
Parent:
10:4f8b0c09bd2c
Child:
15:f8649829dff9
Created both pages within class; Ability to modify temp,light & pressure; Added S_BYTE type

Who changed what in which revision?

UserRevisionLine numberNew contents of line
BenRJG 0:f8fe58d43763 1 #include "LCD.hpp"
Jonathan738 6:f3d1ab8a9e99 2 #include "DataTypes.hpp"
BenRJG 0:f8fe58d43763 3
BenRJG 0:f8fe58d43763 4 void LCD::INIT()
BenRJG 0:f8fe58d43763 5 {
BenRJG 0:f8fe58d43763 6 //All lines default low
BenRJG 0:f8fe58d43763 7 _LCD_RS = 0;
BenRJG 0:f8fe58d43763 8 _LCD_E = 0;
BenRJG 0:f8fe58d43763 9
BenRJG 0:f8fe58d43763 10 //LCD Initialise
BenRJG 0:f8fe58d43763 11 wait_ms(45); //Wait for LCD startup
BenRJG 8:e34e23edfc84 12 /*Step 1*/
BenRJG 10:4f8b0c09bd2c 13 wait_us(40); //Wait whilst LCD busy
BenRJG 8:e34e23edfc84 14 _LCD_RS = control;
BenRJG 8:e34e23edfc84 15 LCD_DDRAM = 0; //Clear data line
BenRJG 10:4f8b0c09bd2c 16 LCD_DDRAM = (FUNC|bit8)>>4; //Put data on line
BenRJG 8:e34e23edfc84 17 LCD_strobe();
BenRJG 4:bb7a78619678 18
BenRJG 10:4f8b0c09bd2c 19 /*Step 2*/ cmdLCD(FUNC|lines2); //Function Set 0x20|0x08 = 0x28
BenRJG 10:4f8b0c09bd2c 20 /*Step 3*/ cmdLCD(FUNC|lines2); //Function Set 0x20|0x08 = 0x28
BenRJG 0:f8fe58d43763 21 /*Step 4*/ cmdLCD(DISPLAY|on); //Display Control 0x08|0x0x04 = 0x0c
BenRJG 0:f8fe58d43763 22 /*Step 5*/ cmdLCD(CLEAR); //Clear Display 0x01
BenRJG 0:f8fe58d43763 23 /*Step 6*/ cmdLCD(ENTRYMODE|I); //Set entry mode 0x04|0x02 = 0x06
BenRJG 0:f8fe58d43763 24
BenRJG 10:4f8b0c09bd2c 25 cmdLCD(RETURN); //return home location
BenRJG 0:f8fe58d43763 26 }
BenRJG 0:f8fe58d43763 27
BenRJG 0:f8fe58d43763 28 void LCD::clear()
BenRJG 0:f8fe58d43763 29 {
BenRJG 0:f8fe58d43763 30 cmdLCD(CLEAR);
BenRJG 0:f8fe58d43763 31 }
BenRJG 0:f8fe58d43763 32
BenRJG 9:f8c8f0b11893 33 void LCD::display(BYTE* str, UINT_16 location)
BenRJG 0:f8fe58d43763 34 {
BenRJG 12:edf31d0a61f0 35 if(location != NULL)
BenRJG 12:edf31d0a61f0 36 {
BenRJG 12:edf31d0a61f0 37 cmdLCD(0x80|location);
BenRJG 12:edf31d0a61f0 38 }
BenRJG 9:f8c8f0b11893 39 U_BYTE p = 0;
BenRJG 9:f8c8f0b11893 40 while((str[p]!= NULL)&&(p<16))
BenRJG 0:f8fe58d43763 41 {
BenRJG 9:f8c8f0b11893 42 putt(str[p]);
BenRJG 9:f8c8f0b11893 43 p++;
BenRJG 0:f8fe58d43763 44 }
BenRJG 0:f8fe58d43763 45 }
BenRJG 0:f8fe58d43763 46
BenRJG 8:e34e23edfc84 47 void LCD::putt(U_BYTE c)
BenRJG 0:f8fe58d43763 48 {
BenRJG 4:bb7a78619678 49 wait_us(3000);
BenRJG 0:f8fe58d43763 50 _LCD_RS = text;
BenRJG 0:f8fe58d43763 51 set_LCD_data(c);
BenRJG 0:f8fe58d43763 52 }
BenRJG 0:f8fe58d43763 53
Jonathan738 6:f3d1ab8a9e99 54 void LCD::cmdLCD(U_BYTE cmd)
BenRJG 0:f8fe58d43763 55 {
BenRJG 4:bb7a78619678 56 wait_us(3000); //Wait whilst LCD busy
BenRJG 0:f8fe58d43763 57 _LCD_RS = control;
BenRJG 0:f8fe58d43763 58 set_LCD_data(cmd); //set data on bus
BenRJG 0:f8fe58d43763 59 }
BenRJG 0:f8fe58d43763 60
BenRJG 0:f8fe58d43763 61 void LCD::LCD_strobe(void)
BenRJG 0:f8fe58d43763 62 {
BenRJG 0:f8fe58d43763 63 wait_us(10);
BenRJG 0:f8fe58d43763 64 _LCD_E = 1;
BenRJG 0:f8fe58d43763 65 wait_us(10);
BenRJG 0:f8fe58d43763 66 _LCD_E = 0;
BenRJG 0:f8fe58d43763 67 }
BenRJG 0:f8fe58d43763 68
Jonathan738 6:f3d1ab8a9e99 69 void LCD::set_LCD_data(U_BYTE d)
BenRJG 0:f8fe58d43763 70 {
BenRJG 0:f8fe58d43763 71 // Send upper 4 bits then lower for bits
BenRJG 0:f8fe58d43763 72 // e.g. 11110000 => 1111 -> 0000
BenRJG 0:f8fe58d43763 73
BenRJG 0:f8fe58d43763 74 LCD_DDRAM = 0; //Clear data line
BenRJG 0:f8fe58d43763 75 LCD_DDRAM = d>>4; //Put data on line
BenRJG 0:f8fe58d43763 76 LCD_strobe();
BenRJG 4:bb7a78619678 77 wait_us(1000);
BenRJG 0:f8fe58d43763 78 LCD_DDRAM = 0; //Clear
BenRJG 0:f8fe58d43763 79 LCD_DDRAM = d; //Put remaining data on line
BenRJG 0:f8fe58d43763 80 LCD_strobe();
BenRJG 0:f8fe58d43763 81 }