Liam Grazier / LGLCD

liamgrazier lcd library 16x02

lglcd.cpp@0:ef052de2d7d0, 2018-01-05 (annotated)

Committer:
liam_grazier
Date:
Fri Jan 05 14:13:07 2018 +0000
Revision:
0:ef052de2d7d0
mylcd driver for nucleof429ZI

Who changed what in which revision?

UserRevisionLine numberNew contents of line
liam_grazier 0:ef052de2d7d0 1 #include "mbed.h"
liam_grazier 0:ef052de2d7d0 2 #include "lglcd.h"
liam_grazier 0:ef052de2d7d0 3
liam_grazier 0:ef052de2d7d0 4 lglcd::lglcd(PinName rs, PinName e, PinName d4, PinName d5,PinName d6, PinName d7) : _lcdrs(rs),_lcde(e), _lcdinfo(d4, d5, d6, d7)
liam_grazier 0:ef052de2d7d0 5 {
liam_grazier 0:ef052de2d7d0 6 cline=1; //set the current line to the top line
liam_grazier 0:ef052de2d7d0 7 cpos=0; //sets the current position to the left most CHARACTER
liam_grazier 0:ef052de2d7d0 8 _lcde=1; //clear enable
liam_grazier 0:ef052de2d7d0 9 _lcdrs=0; // command
liam_grazier 0:ef052de2d7d0 10 l = 0;
liam_grazier 0:ef052de2d7d0 11 writedata(_lcde,CMD);
liam_grazier 0:ef052de2d7d0 12 wait(0.000004); //delay for LCD to initialise.
liam_grazier 0:ef052de2d7d0 13 writedata(0x28,CMD); //set to 4 bit interface, 2 line and 5*8 font
liam_grazier 0:ef052de2d7d0 14 wait(0.000004);
liam_grazier 0:ef052de2d7d0 15 writedata(0x0C,CMD); //cursor on, cursor position blink
liam_grazier 0:ef052de2d7d0 16 wait(0.000004);
liam_grazier 0:ef052de2d7d0 17 writedata(0x10,CMD);
liam_grazier 0:ef052de2d7d0 18 wait(0.000004);
liam_grazier 0:ef052de2d7d0 19 LCD_CLR; //clear display
liam_grazier 0:ef052de2d7d0 20 wait(0.000004);
liam_grazier 0:ef052de2d7d0 21 writedata(0x06,CMD); //move cursor right after write
liam_grazier 0:ef052de2d7d0 22 wait(0.000004);
liam_grazier 0:ef052de2d7d0 23 LCD_HOME; //return home
liam_grazier 0:ef052de2d7d0 24
liam_grazier 0:ef052de2d7d0 25 }
liam_grazier 0:ef052de2d7d0 26 /*---------------------------------------------------------------------*/
liam_grazier 0:ef052de2d7d0 27 void lglcd::clear(void)//set a function to clear the lcd since just calling LCD_CLR can throw error if called to quickly
liam_grazier 0:ef052de2d7d0 28 {
liam_grazier 0:ef052de2d7d0 29 LCD_CLR;
liam_grazier 0:ef052de2d7d0 30 wait(0.002); //2ms delay to stop timing error
liam_grazier 0:ef052de2d7d0 31 }
liam_grazier 0:ef052de2d7d0 32
liam_grazier 0:ef052de2d7d0 33 /*---------------------------------------------------------------------*/
liam_grazier 0:ef052de2d7d0 34 void lglcd::writedata(unsigned char info, unsigned char type)
liam_grazier 0:ef052de2d7d0 35 {
liam_grazier 0:ef052de2d7d0 36 if(type == CMD) {
liam_grazier 0:ef052de2d7d0 37 _lcdrs=0; //COMMAND MODE
liam_grazier 0:ef052de2d7d0 38 } else {
liam_grazier 0:ef052de2d7d0 39 _lcdrs=1; //CHARACTER/DATA MODE
liam_grazier 0:ef052de2d7d0 40 }
liam_grazier 0:ef052de2d7d0 41
liam_grazier 0:ef052de2d7d0 42 _lcdinfo = info >> 4;
liam_grazier 0:ef052de2d7d0 43 wait(0.000040f); // most instructions take 40us
liam_grazier 0:ef052de2d7d0 44 _lcde = 0;
liam_grazier 0:ef052de2d7d0 45 wait(0.000040f);
liam_grazier 0:ef052de2d7d0 46 _lcde = 1;
liam_grazier 0:ef052de2d7d0 47 _lcdinfo = info >> 0;
liam_grazier 0:ef052de2d7d0 48 wait(0.000040f);
liam_grazier 0:ef052de2d7d0 49 _lcde = 0;
liam_grazier 0:ef052de2d7d0 50 wait(0.000040f); // most instructions take 40us
liam_grazier 0:ef052de2d7d0 51 _lcde = 1;
liam_grazier 0:ef052de2d7d0 52 }
liam_grazier 0:ef052de2d7d0 53
liam_grazier 0:ef052de2d7d0 54 void lglcd::write(char charq[])
liam_grazier 0:ef052de2d7d0 55 {
liam_grazier 0:ef052de2d7d0 56 for (int i = 0; i < strlen(charq); i++)
liam_grazier 0:ef052de2d7d0 57 {
liam_grazier 0:ef052de2d7d0 58 wait(0.003);
liam_grazier 0:ef052de2d7d0 59 int count = 0;
liam_grazier 0:ef052de2d7d0 60 count++;
liam_grazier 0:ef052de2d7d0 61 writedata(charq[i], TXT);
liam_grazier 0:ef052de2d7d0 62 if (i == 15) {
liam_grazier 0:ef052de2d7d0 63 writedata(LINE2 | 0, CMD);
liam_grazier 0:ef052de2d7d0 64 }
liam_grazier 0:ef052de2d7d0 65 if (i == 32) {
liam_grazier 0:ef052de2d7d0 66 clear();
liam_grazier 0:ef052de2d7d0 67 writedata(LINE1, CMD);
liam_grazier 0:ef052de2d7d0 68 }
liam_grazier 0:ef052de2d7d0 69 }
liam_grazier 0:ef052de2d7d0 70 }