lcdutl.c

一个瑞萨单片机的程序。。。供大家学习用。。。。。。。。。。。。。。。。。。

/*""FUNC COMMENT""*************************************************************
* ID              : ---
* function name   : int  LCD__putdec(int dec)
* function        : display decimal number on LCD
* parameter       : unsigned int dec;number to be displayed (0乣32767)
* return          : int OK   ; normal end
*                 :     ERR  ; not be initialized
* function used   : LCD__putchar();
* notify          : can not deal with minus
* History	      :
*""FUNC	COMMENT	END""*********************************************************/
int	LCD__putdec(unsigned int dec)
{
	unsigned int num ;					/* number to be displayed				*/
	int i;								/* loop counter					*/
	unsigned char str_buf[5];			/* buffer for data display			*/
	
	if(init_hard){						/* if initialized 				*/
		num = dec;						/* save number to be displayed 			*/
		for(i = 0 ;num != 0; i++){		/* confirm digit						*/
			str_buf[i] = num % 10;		/* get every digit number and save in buffer*/
			num	= num / 10;				
		}
		if(i == 0){						/* if number is 0				*/
			LCD__putchar('0');			/* display '0' in LCD				*/
		}
		else{							/* if number is not 0					*/
			for(--i; i >= 0; i--){		/* loop times of digits				*/
				LCD__putchar(str_buf[i] + '0');		/* after transfered into ASCII code	*/
			}										/* display in LCD		*/
		}
		return	OK;						/* normal end						*/
	}
										/* if not be initialized 		*/
	return	ERR;						/* return error				*/
} 


/*""FUNC COMMENT""*************************************************************
* ID              : ---
* function name   : int  LCD__puthex(int dec)
* function        : display hexadeimal number in LCD
* parameter       : unsigned int dec;number to be displayed (0乣0x7fff)
* return          : int OK   ; normal end
*                 :     ERR  ; if not be initialized
* function used   : LCD__putchar();
* notice          : can not deal with minus
* History         :
*""FUNC	COMMENT	END""*********************************************************/
int	LCD__puthex(unsigned int dec)
{
	unsigned int num ;					/* number to be displayed				*/
	int i ;								/* loop counter				*/
	unsigned char str_buf[4];			/* buffer for displaying data		*/

	
	if(init_hard){						/* if initialized				*/
		num = dec ;						/* save number to be displayed 		*/
		for(i = 0 ; num != 0; i++){		/* confirm digit					*/
			str_buf[i] = num % 16;		/* get every digit number and save in buffer	*/
			num	= num / 16;
		}
		if(i == 0){						/* if number is 0						*/
			LCD__putchar('0');			/* display '0' in LCD				*/
		}
		else{							/* if number is not 0					*/
			for(--i; i >= 0; i--){	/* after transfered into ASCII code, display in LCD	*/
				if(str_buf[i] < 0x0A){	/* if less than 0x0A (plus 0x30)	*/
					LCD__putchar(str_buf[i] + '0');
				}
				else{					/* if more than or equal 0x0A (plus 0x37	*/
					LCD__putchar(str_buf[i] + 0x37);
				}
			}	
		}
		return	OK;
	}
	
	return	ERR;
} 


/* #############################################################################
 * ###	private function
 */


/*""FUNC COMMENT""*************************************************************
* ID              : ---
* function name   : void init_timerC(void)
* function        : initialize timer C
*                 : set as output compare mode, confirm time for process LCD command
* parameter       : none
* return          : none
* function used   : none
* notice          : interrupt function called by interrupt program
* History         :
*""FUNC	COMMENT	END""*********************************************************/
static void	init_timerC(void)
{
	tcc0 = 0x00	;						/* set timer C control register 0		 */
										/* 00000000							 */
										/* |||||||+ stop count			 */
										/* |||||++- select f1 as count source*/
										/* +++++--- this mode invalid */
	tcc1 = 0x08	;						/* set timer C control register 1		 */
										/* 00001000							 */
										/* |||||+++ this mode invalid		 */
										/* ||||+--- comapre 0(output compare mode) */
										/* ++++---- this mode invalid		 */
	cmp0ic = 0x01 ;						/* set compare 0 interrupt(priority level=1)	 */
}


/*""FUNC COMMENT""*************************************************************
* ID              : ---
* function name   : void set_busy( unsigned int time )
* function        : set busy flag(start timer C)
* parameter       : unsigned int time ;  command processing time(50us*parameter)
* return          : none
* function used   : none
* notice          : none
* History	      :
*""FUNC	COMMENT	END""*********************************************************/
static void	set_busy(unsigned int time)
{
	F_busy	= 1;						/* set busy flag				 */
	tm0		= time * 1000;				/* set timer C						 */
	tcc00 	= 1;						/* start timer C counter				 */
}


/*""FUNC COMMENT""*************************************************************
* ID              : ---
* function name   : void INT_cmp0( void )
* function        : compare 0 interrupt function(clear busy flag)
* parameter       : none
* return          : none
* function used   : none
* notice          : none
* History	      :
*""FUNC	COMMENT	END""*********************************************************/
void INT_cmp0(void)
{
	tcc00		= 0;					/* stop timer C						*/
	F_busy		= 0;					/* clear busy flag				*/
	ir_cmp0ic	= 0;					/* clear interrupt request bit			*/
}


/*""FUNC COMMENT""*************************************************************
* ID              : ---
* function name   : static int read_creg(void)
* function        : read from Command-Register
* parameter       : none
* return          : int ;    value read(only lower 8 bits valid)
* function used   : _lcd1__rd_nibble_creg();
* notice          : none
* History         :
*""FUNC	COMMENT	END""*********************************************************/
static int read_creg(void)
{
	int	command;

	command	 = _lcd1__rd_nibble_creg() << 4;		/* interface length 4 bits	*/
	command	|= _lcd1__rd_nibble_creg();

	return command;
}


/*""FUNC COMMENT""*************************************************************
* ID              : ---
* function name   : static void write_creg(int data)
* function        : write Command-Register
* parameter       : int command  ;   value to write(only lower 8 bits valid)
* return          : none
* function used   : _lcd1__wr_nibble_creg();
* notice          : none
* History         :
*""FUNC	COMMENT	END""*********************************************************/
static void	write_creg(int command)
{
	_lcd1__wr_nibble_creg(command >>4 &	0x0f);			/* interface length 4 bits	*/
	_lcd1__wr_nibble_creg(command	  &	0x0f);
}


/*""FUNC COMMENT""*************************************************************
* ID              : ---
* function name   : static int read_dreg(void)
* function        : read from Data-Register
* parameter       : none
* return          : int ;    value read(only lower 8 bits valid)
* function used   : _lcd1__rd_nibble_dreg();
* notice          : none
* History         :
*""FUNC	COMMENT	END""*********************************************************/
static int read_dreg(void)
{
	int	data;

	data  =	_lcd1__rd_nibble_dreg()	<< 4;			/* interface length 4 bits	*/
	data |=	_lcd1__rd_nibble_dreg();

	return data;
}


/*""FUNC COMMENT""*************************************************************
* ID              : ---
* function name   : static void write_dreg(int data)
* function        : write Data-Register
* parameter       : int data ;   value to write(only lower 8 bits valid)
* return          : none
* function used   : _lcd1__wr_nibble_dreg();
* notice          : none
* History         :
*""FUNC	COMMENT	END""*********************************************************/
static void	write_dreg(int data)
{
	_lcd1__wr_nibble_dreg(data>>4 &	0x0f);			/* interface length 4 bits	*/
	_lcd1__wr_nibble_dreg(data	  &	0x0f);
}


/*""FUNC COMMENT""*************************************************************
* ID              : ---
* function name   : void move_cursol( void )
* function        : move cursor position
* parameter       : none
* return          : none
* function used   : LCD_setcursol();
* notice          : none
* History         :
*""FUNC	COMMENT	END""*********************************************************/
static void	move_cursol(void)
{
	if(++cursol_x > 0x0f){				/* move cursor to right, if get to end of the line	 */
		cursol_x = 0;					/* move to begin of the line			 */
		if(++cursol_y >= 2){			/* return, if over the second line	 */
			cursol_y = 0;				/* return to begin of the line		 */
		}
		LCD__setcursol(cursol_x, cursol_y);	 	/* set cursor		 */
	}
}


/******************************************************************************
	end	of file
******************************************************************************/