Revision 0:0e97b0a48eb8, committed 2013-10-08

Comitter:

mr63

Date:

Tue Oct 08 15:41:55 2013 +0000

Commit message:

LCD 4-Line Text Display. This is a simple library that can be used to print a formatted string on up to a 4 line display. By calling a single Method.

Changed in this revision

diff -r 000000000000 -r 0e97b0a48eb8 LCD.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/LCD.cpp	Tue Oct 08 15:41:55 2013 +0000
@@ -0,0 +1,91 @@
+#include "LCD.h"
+
+//LCD Class Constructor for polling A2D using int ADC0848::Poll_A2D(unsigned char Channel)
+LCD::LCD(PinName pin1, PinName pin2, PinName pin3, PinName pin4, PinName pin5, PinName pin6, PinName pin7, PinName pin8, PinName pin9, PinName pin10) 
+								:_DataBus(pin1,pin2,pin3,pin4,pin5,pin6,pin7,pin8), _RS(pin9), _Enable(pin10)
+{
+	Initialize();
+}
+
+void LCD::Initialize()
+ {
+  wait(.01); 
+  _RS = 0;
+	_Enable = 0;	 //EN and RS = 0
+  wait(.001);
+  WriteLCDCmd(0x38);       //Required for initialization    
+  wait(.001);
+  WriteLCDCmd(0x38);       //Required for initialization    
+  wait(.001);
+  WriteLCDCmd(0x38);       //Required for initialization    
+  wait(.001);
+  WriteLCDCmd(0x38);       //2 rows x 16 cols 5x7 dot char    
+  wait(.001);
+  WriteLCDCmd(0x0C);       //Display on, cursor off
+  wait(.001);
+  WriteLCDCmd(0x01);       //Cursor home
+  wait(.001);
+  WriteLCDCmd(0x06);       //incr cursor and shift on
+  wait(.001);
+	wait(.1);	 
+  return;
+ }
+
+void LCD::WriteLCDData(char c, char Pos)
+ {
+  WriteLCDCmd(Pos);
+	_DataBus.output();
+  wait(.001);
+  _DataBus  = c;                    //Data to LCD Data
+  _RS = 1;
+	_Enable = 1;//RS = EN = 1
+  wait(.001);
+  _Enable = 0;            //EN = 0
+  return;
+ }
+
+void LCD::WriteLCDCmd(char c)
+ {
+	_DataBus.output();
+  _DataBus = c;              //Data to LCD data
+  _RS = 0;      //RS = 0
+  _Enable = 1;      //En = 1
+  wait(.010);
+  _Enable = 0;      //En = 0
+  return;
+ }
+ 
+ void LCD::ClearDisplay()
+  {
+   WriteLCDCmd(0x01);         // clear display
+  }
+
+	
+void LCD::Print_String(char* Pbuffer,char line_num, char offset)
+	{
+		unsigned int i=0;
+		char pos = 0;
+		switch (line_num)
+		{
+			case(1):
+				pos = 0x80+offset;
+				break;
+			case(2):
+				pos = 0xC0+offset;
+				break;
+			case(3):
+				pos = 0x94+offset;
+				break;
+			case(4):
+				pos = 0xD4+offset;
+				break;
+			default:
+				break;			
+		}
+		while (Pbuffer[i] !=  0)
+    {
+        WriteLCDData(Pbuffer[i], pos+i);  
+        i++;    
+    }
+	}
+	
\ No newline at end of file

diff -r 000000000000 -r 0e97b0a48eb8 LCD.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/LCD.h	Tue Oct 08 15:41:55 2013 +0000
@@ -0,0 +1,28 @@
+#include "MBED.h"
+
+
+
+
+
+
+class LCD {
+public:					//Strobe			//CLK					//Data
+ 
+ LCD(PinName pin1, PinName pin2, PinName pin3, PinName pin4, PinName pin5, PinName pin6, PinName pin7, PinName pin8, PinName pin9, PinName pin10); 
+		void ClearDisplay();
+		void Print_String(char* Pbuffer,char line_num=1, char offset=0);
+
+
+
+private:
+
+	BusInOut _DataBus;
+  DigitalOut 		_RS;
+	DigitalOut 		_Enable;
+
+		void Initialize();
+		void WriteLCDData(char c, char Pos);
+		void WriteLCDCmd(char c);
+
+
+};

diff -r 000000000000 -r 0e97b0a48eb8 main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Oct 08 15:41:55 2013 +0000
@@ -0,0 +1,38 @@
+
+#include "LCD.h"
+#include "stdio.h"
+
+Serial pc(USBTX,USBRX);
+char msgInit[] = "Display ready";
+////////////D0--------------------------D7, RS, Enable
+LCD Display(p13,p14,p15,p16,p17,p18,p19,p20,p12,p10);
+
+int main() {
+	int count;
+	Display.ClearDisplay();
+	Display.Print_String(msgInit);
+	wait(5);
+	Display.ClearDisplay();
+	sprintf(msgInit,"Line 1: Hello");	
+	Display.Print_String(msgInit);
+	sprintf(msgInit,"Line 2: Mom");
+  Display.Print_String(msgInit,2);
+	sprintf(msgInit,"Line 3: How are");
+	Display.Print_String(msgInit,3);
+	sprintf(msgInit,"Line 4: You");
+	Display.Print_String(msgInit,4);
+	wait(10);
+  Display.ClearDisplay();
+    while(1) //Do what ever is between these brackets forever or until the micro is reset.
+			{
+				for(count=0;count<5000;count++)
+				{
+					sprintf(msgInit,"I=%d",count);	
+					Display.Print_String(msgInit,1,5);
+					wait(.5);
+				}
+				
+			}	
+}
+
+