lglcd.cpp

00001 /*   ELEC351 COURSEWORK 2018 
00002 DESIGNED USING MBED ONLINE COMPILER IMPORTED TO KEIL
00003 LIAM GRAZIER // DOUG TILLEY // ALEX BARON 
00004  */
00005 #include "mbed.h"
00006 #include "lglcd.h"
00007 lglcd::lglcd(PinName RS, PinName E, PinName D4, PinName D5,PinName D6, PinName D7) : _lcdrs(RS),_lcde(E), _lcdinfo(D4, D5, D6, D7)
00008 {
00009        _lcde=1;              //clear enable
00010     _lcdrs=0;             // command
00011     writedata(_lcde,CMD);
00012     wait(0.000004);              
00013     writedata(0x28,CMD);         
00014     wait(0.000004);
00015     writedata(0x0C,CMD);      //turnoncursor and blink
00016     wait(0.000004);
00017     writedata(0x10,CMD);
00018     wait(0.000004);
00019     LCD_CLR;                 //clearlcd
00020     wait(0.000004);
00021     writedata(0x06,CMD);     //movecursor right
00022     wait(0.000004);
00023     LCD_HOME;               //Return to the 0,0 
00024 }
00025 void lglcd::clear(void)//lcd clear command with a tiny wait to ensure commadn finishes 
00026 {
00027     LCD_CLR;             //clearcommandwitha small wait
00028     wait(0.002); 
00029 }
00030 void lglcd::setline(int row,int column) //set lu=ine and column function
00031 {   
00032     if(row == 1) 
00033     { 
00034         writedata(LINE1|column,CMD);  //line1 included 
00035         wait(0.005); 
00036     }
00037     if(row == 2)
00038     {
00039         writedata(LINE2|column,CMD); 
00040         wait(0.005); 
00041     }
00042 }
00043 void lglcd::writedata(unsigned char data, unsigned char type) //manual write data wherever the pointer is , requires the line to be set first .
00044 {
00045     if(type == CMD) 
00046     {
00047         _lcdrs=0;          //COMMAND MODE
00048     }
00049     else
00050     {
00051         _lcdrs=1;          //CHARACTER/DATA MODE
00052     } 
00053     _lcdinfo = data >> 4;
00054     wait(0.000050f); 
00055     _lcde = 0;
00056     wait(0.000050f);
00057     _lcde = 1;
00058     _lcdinfo = data >> 0;
00059     wait(0.000050f);
00060     _lcde = 0;
00061     wait(0.000050f);
00062     _lcde = 1;
00063 }
00064 void lglcd::write(char charq[]) //write character, not used, used writedata mainly, this works well if need to write along string to 2 lines (FOR LOOP FOR CHANING LINE AUTO) 
00065 { 
00066     for (int n = 0; n < strlen(charq); n++)
00067     {
00068         int count = 0;
00069         count++;
00070         writedata(charq[n], TXT);
00071         if (n == 15)
00072         {
00073             writedata(LINE2 | 0, CMD);
00074         }
00075         if (n == 32) 
00076         {
00077             clear();
00078             writedata(LINE1, CMD);
00079         }
00080     }   
00081 }