David Buck / Mbed 2 deprecated voltmeter

Dependencies:   mbed

LCD_setup.cpp@0:d322a5241da8, 2009-12-16 (annotated)

Committer:
Kaikestu
Date:
Wed Dec 16 12:04:23 2009 +0000
Revision:
0:d322a5241da8

        

        
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// LCD_setup.cpp





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#include "header.h"





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/*****************************************************





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  subroutines





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*****************************************************/





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/****initialise LCD function ****/  





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void LCD_init(void){  





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	delay_l();





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    FIO2DIR0=0xFF;  /* set port 2 byte 0 (ctrl) to output */





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    FIO2PIN0=0x00;   //clear Port 2 byte 0 





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		                 //FIO2PIN bit0=R/W	 (read/write)





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              		     //FIO2PIN bit1=RS	 (register select)





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                		 //FIO2PIN bit2=E    (enable)





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						 //all initialised low





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	        		     // set Port 0 and 1 to operate as fast registers			





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    SCS |= 0x00000001;  //  by setting the GPIOM bit of the SCS register





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    FIO0DIR2=0xFF;       // set port 0 byte 2 (data) to output 





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    FIO0PIN2=0x00;		 // clear Port 0 byte 2  





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  /* RS already initialised to 'instruction' (low) */





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	/**** Function set*/





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  FIO0PIN2=0x38;		      /* 2-line mode, 7 dot characters */					





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  toggle_enable();





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  /**** Display on/off*/





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  FIO0PIN2=0x0C;		      /* display on, cursor off, blink off */					





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  toggle_enable();





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  /**** Clear display */





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  FIO0PIN2=0x01;		      /* clear */





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  toggle_enable();





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  /**** Set entry mode */				





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  FIO0PIN2=0x06;       	 /* increment cursor, shift off */





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  toggle_enable();





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}





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/**** LCD Display 'Voltmeter' */





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void LCD_displayV(){





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  FIO2CLR0=0x02;		 /* set RS to 'control' */





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  FIO0PIN2=0x01;		      /* clear display*/





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  toggle_enable();						





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  FIO2SET0=0x02;		 /* set RS to 'data' */					





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    FIO0PIN2=_sp;       // process and display character		      





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  toggle_enable();





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    FIO0PIN2=_sp;		      





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  toggle_enable();





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    FIO0PIN2=_sp;		      





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  toggle_enable();    





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    FIO0PIN2=_V;		       





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  toggle_enable();  





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    FIO0PIN2=_O;		       





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  toggle_enable();





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    FIO0PIN2=_L;		       





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  toggle_enable();





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    FIO0PIN2=_T;		       





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  toggle_enable();





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    FIO0PIN2=_M;		       





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  toggle_enable();





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    FIO0PIN2=_E;		       





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  toggle_enable();  





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    FIO0PIN2=_T;		       





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  toggle_enable();





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    FIO0PIN2=_E;		       





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  toggle_enable();  





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    FIO0PIN2=_R;		       





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  toggle_enable();





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  /* start of line 2  */





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  FIO2CLR0=0x02;		 /* set RS to 'instruction' */





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  FIO0PIN2=0xC6;		       /* set address to line 2 */





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  toggle_enable();





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  FIO2SET0=0x02;		 /* set RS to 'data' */





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  FIO0PIN2=_0;		       





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  toggle_enable();  





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  FIO0PIN2=0x2e;		       





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  toggle_enable();





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  FIO0PIN2=_0;		       





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  toggle_enable();





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  FIO0PIN2=_V;		       





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  toggle_enable();





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}





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/*** toggle_enable */





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void toggle_enable(void){





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 	FIO2SET0=0x04;		 // Toggle enable flag on */





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 	delay_s();			





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 	FIO2CLR0=0x04;		 /* Toggle enable flag off */





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 	delay_s();





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}





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/**************************************************************************





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* DEM16217 LCD connected to mbed as follows:





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**************************************************************************





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RW  = Read/Write     = LCD pin05 = mbed pin16  = LPC pin75 = GPIO P2.0 (Port2,byte0,bit0)





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RS  = RegisterSelect = LCD pin04 = mbed pin15  = LPC pin74 = GPIO P2.1 (0,1)





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E   = Enable         = LCD pin06 = mbed pin14  = LPC pin73 = GPIO P2.2 (0,2)





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DB0 = Data Bit 0     = LCD pin07 = mbed pin10  = LPC pin63 = GPIO P0.16 (Port0,byte2,bit0)





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DB1 = Data Bit 1     = LCD pin08 = mbed pin08  = LPC pin61 = GPIO P0.17 (2,1)





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DB2 = Data Bit 2     = LCD pin09 = mbed pin07  = LPC pin60 = GPIO P0.18 (2,2)





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DB3 = Data Bit 3     = LCD pin10 = mbed pin06  = LPC pin59 = GPIO P0.19 (2,3)





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DB4 = Data Bit 4     = LCD pin11 = mbed pin05  = LPC pin58 = GPIO P0.20 (2,4)   





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DB5 = Data Bit 5     = LCD pin12 = mbed pin04  = LPC pin57 = GPIO P0.21 (2,5) 





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DB6 = Data Bit 6     = LCD pin13 = mbed pin03  = LPC pin56 = GPIO P0.22 (2,6)





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DB7 = Data Bit 7     = LCD pin14 = mbed pin36  = LPC pin09 = GPIO P0.23 (2,7)





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**************************************************************************/