Revision 0:ef052de2d7d0, committed 2018-01-05

Comitter:

liam_grazier

Date:

Fri Jan 05 14:13:07 2018 +0000

Commit message:

mylcd driver for nucleof429ZI

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lglcd.cpp	Fri Jan 05 14:13:07 2018 +0000
@@ -0,0 +1,70 @@
+#include "mbed.h"
+#include "lglcd.h"
+
+lglcd::lglcd(PinName rs, PinName e, PinName d4, PinName d5,PinName d6, PinName d7) : _lcdrs(rs),_lcde(e), _lcdinfo(d4, d5, d6, d7)
+{
+    cline=1; //set the current line to the top line
+    cpos=0; //sets the current position to the left most CHARACTER
+    _lcde=1;              //clear enable
+    _lcdrs=0;             // command
+    l = 0;
+    writedata(_lcde,CMD);
+    wait(0.000004);              //delay for LCD to initialise.
+    writedata(0x28,CMD);         //set to 4 bit interface, 2 line and 5*8 font
+    wait(0.000004);
+    writedata(0x0C,CMD);         //cursor on, cursor position blink
+    wait(0.000004);
+    writedata(0x10,CMD);
+    wait(0.000004);
+    LCD_CLR;                        //clear display
+    wait(0.000004);
+    writedata(0x06,CMD);         //move cursor right after write
+    wait(0.000004);
+    LCD_HOME;                                   //return home
+
+}
+/*---------------------------------------------------------------------*/
+void lglcd::clear(void)//set a function to clear the lcd since just calling LCD_CLR can throw error if called to quickly
+{
+    LCD_CLR;
+    wait(0.002); //2ms delay to stop timing error
+}
+
+/*---------------------------------------------------------------------*/
+void lglcd::writedata(unsigned char info, unsigned char type)
+{
+    if(type == CMD) {
+        _lcdrs=0;              //COMMAND MODE
+    } else {
+        _lcdrs=1;          //CHARACTER/DATA MODE
+    }
+    
+    _lcdinfo = info >> 4;
+    wait(0.000040f); // most instructions take 40us
+    _lcde = 0;
+    wait(0.000040f);
+    _lcde = 1;
+    _lcdinfo = info >> 0;
+    wait(0.000040f);
+    _lcde = 0;
+    wait(0.000040f);  // most instructions take 40us
+    _lcde = 1;
+}
+
+void lglcd::write(char charq[])
+{ 
+ for (int i = 0; i < strlen(charq); i++)
+  {
+    wait(0.003);
+    int count = 0;
+    count++;
+    writedata(charq[i], TXT);
+    if (i == 15) {
+      writedata(LINE2 | 0, CMD);
+    }
+    if (i == 32) {
+      clear();
+      writedata(LINE1, CMD);
+   }
+  }
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lglcd.h	Fri Jan 05 14:13:07 2018 +0000
@@ -0,0 +1,36 @@
+#ifndef __LGLCD_H
+#define __LGLCD_H
+
+#define CMD          0
+#define TXT          1
+#define CLEAR        1
+#define HOME         2
+#define READ         1
+#define WRITE    0
+#define LEFT         0
+#define RIGHT    1
+
+#define LINE1    0x80        // Start address of first line
+#define LINE2    0xC0        // Start address of second line
+
+#define LCD_CLR             (writedata(CLEAR,CMD))
+#define LCD_HOME            (writedata(HOME,CMD))
+#define LCD_BUSYBIT 0x8000  //correct value for the lcd BUSYBIT
+
+
+class lglcd
+{
+public:
+lglcd(PinName rs, PinName e, PinName d4, PinName d5,PinName d6, PinName d7);
+void clear(void);
+void writedata(unsigned char info, unsigned char type);
+void write(char charq[]);
+int l;
+protected:
+BusOut _lcdinfo;
+DigitalOut _lcdrs;
+DigitalOut _lcde;
+int cline;
+int cpos;
+};
+#endif
\ No newline at end of file