Ben Gordon / Mbed OS ELEC351_GroupA-branch1

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LCD.cpp@9:f8c8f0b11893, 2018-11-07 (annotated)

Committer:
BenRJG
Date:
Wed Nov 07 17:44:59 2018 +0000
Revision:
9:f8c8f0b11893
Parent:
8:e34e23edfc84
Child:
10:4f8b0c09bd2c
Removed unneeded code from LCD class to simplify

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 8:e34e23edfc84 13 wait_us(3000); //Wait whilst LCD busy
BenRJG 8:e34e23edfc84 14 _LCD_RS = control;
BenRJG 8:e34e23edfc84 15 LCD_DDRAM = 0; //Clear data line
BenRJG 8:e34e23edfc84 16 LCD_DDRAM = DDRAM>>4; //Put data on line
BenRJG 8:e34e23edfc84 17 LCD_strobe();
BenRJG 4:bb7a78619678 18
BenRJG 0:f8fe58d43763 19 /*Step 2*/ cmdLCD(DDRAM|lines2); //Function Set 0x20|0x08 = 0x28
BenRJG 0:f8fe58d43763 20 /*Step 3*/ cmdLCD(DDRAM|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 1:1f9ea120f8a9 25 cmdLCD(0x20); //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 9:f8c8f0b11893 35 cmdLCD(0x80|location);
BenRJG 9:f8c8f0b11893 36 U_BYTE p = 0;
BenRJG 9:f8c8f0b11893 37 while((str[p]!= NULL)&&(p<16))
BenRJG 0:f8fe58d43763 38 {
BenRJG 9:f8c8f0b11893 39 putt(str[p]);
BenRJG 9:f8c8f0b11893 40 p++;
BenRJG 0:f8fe58d43763 41 }
BenRJG 0:f8fe58d43763 42 }
BenRJG 0:f8fe58d43763 43
BenRJG 8:e34e23edfc84 44 void LCD::putt(U_BYTE c)
BenRJG 0:f8fe58d43763 45 {
BenRJG 4:bb7a78619678 46 wait_us(3000);
BenRJG 0:f8fe58d43763 47 _LCD_RS = text;
BenRJG 0:f8fe58d43763 48 set_LCD_data(c);
BenRJG 0:f8fe58d43763 49 }
BenRJG 0:f8fe58d43763 50
Jonathan738 6:f3d1ab8a9e99 51 void LCD::cmdLCD(U_BYTE cmd)
BenRJG 0:f8fe58d43763 52 {
BenRJG 4:bb7a78619678 53 wait_us(3000); //Wait whilst LCD busy
BenRJG 0:f8fe58d43763 54 _LCD_RS = control;
BenRJG 0:f8fe58d43763 55 set_LCD_data(cmd); //set data on bus
BenRJG 0:f8fe58d43763 56 }
BenRJG 0:f8fe58d43763 57
BenRJG 0:f8fe58d43763 58 void LCD::LCD_strobe(void)
BenRJG 0:f8fe58d43763 59 {
BenRJG 0:f8fe58d43763 60 wait_us(10);
BenRJG 0:f8fe58d43763 61 _LCD_E = 1;
BenRJG 0:f8fe58d43763 62 wait_us(10);
BenRJG 0:f8fe58d43763 63 _LCD_E = 0;
BenRJG 0:f8fe58d43763 64 }
BenRJG 0:f8fe58d43763 65
Jonathan738 6:f3d1ab8a9e99 66 void LCD::set_LCD_data(U_BYTE d)
BenRJG 0:f8fe58d43763 67 {
BenRJG 0:f8fe58d43763 68 // Send upper 4 bits then lower for bits
BenRJG 0:f8fe58d43763 69 // e.g. 11110000 => 1111 -> 0000
BenRJG 0:f8fe58d43763 70
BenRJG 0:f8fe58d43763 71 LCD_DDRAM = 0; //Clear data line
BenRJG 0:f8fe58d43763 72 LCD_DDRAM = d>>4; //Put data on line
BenRJG 0:f8fe58d43763 73 LCD_strobe();
BenRJG 4:bb7a78619678 74 wait_us(1000);
BenRJG 0:f8fe58d43763 75 LCD_DDRAM = 0; //Clear
BenRJG 0:f8fe58d43763 76 LCD_DDRAM = d; //Put remaining data on line
BenRJG 0:f8fe58d43763 77 LCD_strobe();
BenRJG 0:f8fe58d43763 78 }