Diff: LCD_setup.cpp

Revision:

0:d322a5241da8

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/LCD_setup.cpp	Wed Dec 16 12:04:23 2009 +0000
@@ -0,0 +1,113 @@
+// LCD_setup.cpp
+
+#include "header.h"
+/*****************************************************
+  subroutines
+*****************************************************/
+/****initialise LCD function ****/  
+void LCD_init(void){  
+	delay_l();
+    FIO2DIR0=0xFF;  /* set port 2 byte 0 (ctrl) to output */
+    FIO2PIN0=0x00;   //clear Port 2 byte 0 
+		                 //FIO2PIN bit0=R/W	 (read/write)
+              		     //FIO2PIN bit1=RS	 (register select)
+                		 //FIO2PIN bit2=E    (enable)
+						 //all initialised low
+                 
+	        		     // set Port 0 and 1 to operate as fast registers			
+    SCS |= 0x00000001;  //  by setting the GPIOM bit of the SCS register
+    FIO0DIR2=0xFF;       // set port 0 byte 2 (data) to output 
+    FIO0PIN2=0x00;		 // clear Port 0 byte 2  
+ 
+  /* RS already initialised to 'instruction' (low) */
+	
+	/**** Function set*/
+  FIO0PIN2=0x38;		      /* 2-line mode, 7 dot characters */					
+  toggle_enable();
+ 
+  /**** Display on/off*/
+  FIO0PIN2=0x0C;		      /* display on, cursor off, blink off */					
+  toggle_enable();
+ 	 	
+  /**** Clear display */
+  FIO0PIN2=0x01;		      /* clear */
+  toggle_enable();
+  
+  /**** Set entry mode */				
+  FIO0PIN2=0x06;       	 /* increment cursor, shift off */
+  toggle_enable();
+     
+}
+
+
+/**** LCD Display 'Voltmeter' */
+void LCD_displayV(){
+  FIO2CLR0=0x02;		 /* set RS to 'control' */
+  FIO0PIN2=0x01;		      /* clear display*/
+  toggle_enable();						
+  FIO2SET0=0x02;		 /* set RS to 'data' */					
+  
+    FIO0PIN2=_sp;       // process and display character		      
+  toggle_enable();
+    FIO0PIN2=_sp;		      
+  toggle_enable();
+    FIO0PIN2=_sp;		      
+  toggle_enable();    
+    FIO0PIN2=_V;		       
+  toggle_enable();  
+    FIO0PIN2=_O;		       
+  toggle_enable();
+    FIO0PIN2=_L;		       
+  toggle_enable();
+    FIO0PIN2=_T;		       
+  toggle_enable();
+    FIO0PIN2=_M;		       
+  toggle_enable();
+    FIO0PIN2=_E;		       
+  toggle_enable();  
+    FIO0PIN2=_T;		       
+  toggle_enable();
+    FIO0PIN2=_E;		       
+  toggle_enable();  
+    FIO0PIN2=_R;		       
+  toggle_enable();
+  
+  /* start of line 2  */
+  FIO2CLR0=0x02;		 /* set RS to 'instruction' */
+  FIO0PIN2=0xC6;		       /* set address to line 2 */
+  toggle_enable();
+  FIO2SET0=0x02;		 /* set RS to 'data' */
+      
+  FIO0PIN2=_0;		       
+  toggle_enable();  
+  FIO0PIN2=0x2e;		       
+  toggle_enable();
+  FIO0PIN2=_0;		       
+  toggle_enable();
+  FIO0PIN2=_V;		       
+  toggle_enable();
+}
+
+/*** toggle_enable */
+void toggle_enable(void){
+ 	FIO2SET0=0x04;		 // Toggle enable flag on */
+ 	delay_s();			
+ 	FIO2CLR0=0x04;		 /* Toggle enable flag off */
+ 	delay_s();
+}
+
+/**************************************************************************
+* DEM16217 LCD connected to mbed as follows:
+**************************************************************************
+RW  = Read/Write     = LCD pin05 = mbed pin16  = LPC pin75 = GPIO P2.0 (Port2,byte0,bit0)
+RS  = RegisterSelect = LCD pin04 = mbed pin15  = LPC pin74 = GPIO P2.1 (0,1)
+E   = Enable         = LCD pin06 = mbed pin14  = LPC pin73 = GPIO P2.2 (0,2)
+DB0 = Data Bit 0     = LCD pin07 = mbed pin10  = LPC pin63 = GPIO P0.16 (Port0,byte2,bit0)
+DB1 = Data Bit 1     = LCD pin08 = mbed pin08  = LPC pin61 = GPIO P0.17 (2,1)
+DB2 = Data Bit 2     = LCD pin09 = mbed pin07  = LPC pin60 = GPIO P0.18 (2,2)
+DB3 = Data Bit 3     = LCD pin10 = mbed pin06  = LPC pin59 = GPIO P0.19 (2,3)
+DB4 = Data Bit 4     = LCD pin11 = mbed pin05  = LPC pin58 = GPIO P0.20 (2,4)   
+DB5 = Data Bit 5     = LCD pin12 = mbed pin04  = LPC pin57 = GPIO P0.21 (2,5) 
+DB6 = Data Bit 6     = LCD pin13 = mbed pin03  = LPC pin56 = GPIO P0.22 (2,6)
+DB7 = Data Bit 7     = LCD pin14 = mbed pin36  = LPC pin09 = GPIO P0.23 (2,7)
+**************************************************************************/
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