lcd12864.c

瑞萨(Renesas)M16C系列芯片的函数库

#include "sfr62p.h"	// SFR definition of M16C/62P
#include "Lcd12864.h"	// LCD (128*64) utility header file


void _lcd12864__initial(void);              /* initialize the LCD control port */
void _lcd12864__wait(unsigned int t);       /* software wait for t*100us       */
void _lcd12864__wr_creg(int command);/* write command to LCD            */
void _lcd12864__wr_dreg(int data);   /* write data to LCD               */
int _lcd12864__rd_creg(void);        /* read command from LCD           */
int _lcd12864__rd_dreg(void);        /* read data from LCD              */

/*""FUNC COMMENT""*************************************************************
* ID         		: ---
* Function name     : void Lcd12864_init_lcd(void)
* Function     		: initialize the LCD 128*64
* Paramenter   		: none
* Return 	 		: none
* Function used		: _lcd12864__initial() : initialize the LCD control port
*					: _lcd12864__wait(unsigned int) : software wait for t*100us
*					: _lcd12864__wr_nibble_creg(int) : write command to LCD (8bit)
*					: Lcd12864_write_creg(char) : write command to LCD (8bit)
*					: Lcd12864_is_busy(void)	: wait for busy flag free
* Notice	   		: none
* History    		: ---
*""FUNC COMMENT END""*********************************************************/
void Lcd12864_init_lcd(void)
{
	pd10	= pd10 | 0xf0;	// set the higher 4 bit of P10 as output, lower 4 bit as input
	p10_6	= 0;
	p10_7 	= 0;
	pd0 	= 0x00;	// set P0 as input

   _lcd12864__initial();                  /* initialize the LCD control port */

    /*--- initial process after LCD reset ---*/
    _lcd12864__wait(150);                   /* wait 15ms after VDD is steady       */
    _lcd12864__wr_creg(0x01);        /* function set 8bit(0x03)   */

    _lcd12864__wait(41);                    /* wait 4.1ms                        */
    _lcd12864__wr_creg(0x03);        /* function set 8bit(0x03)   */

    _lcd12864__wait(1);                     /* wait 0.1ms                        */
    _lcd12864__wr_creg(0x0f);        /* function set 8bit(0x03)   */

    _lcd12864__wait(1);                     /* wait 0.1ms                        */
    _lcd12864__wr_creg(CMD_FUNC_D8_N2_F7);      /* set interface data length as 4 bit    */
                                        /* 2 lines, 5*7 dots                */

    _lcd12864__wait(1);                     /* wait 0.1ms                        */
    _lcd12864__wr_creg(CMD_DISP_DS);            /* display off                         */
    while(Lcd12864_is_busy());                   /* wait for busy flag free           */
    _lcd12864__wr_creg(CMD_CLEAR);              /* clear display                       */
    while(Lcd12864_is_busy());                   /* wait for busy flag free           */
    _lcd12864__wr_creg(CMD_ENTRY_INC);         /* entry mode, increment  */
    while(Lcd12864_is_busy());                   /* wait for busy flag free           */
    _lcd12864__wr_creg(CMD_DISP_EN);            /* display on, cursol off          */
                                        /* blink off                    */	
}

/*""FUNC COMMENT""*************************************************************
* ID         		: ---
* Function name     : void Lcd12864_clear_lcd(void)
* Function     		: clear display
* Paramenter   		: none
* Return 	 		: none
* Function used		: Lcd12864_write_creg(char) : write command to LCD (8bit)
*					: Lcd12864_is_busy(void)	: wait for busy flag free
* Notice	   		: none
* History    		: ---
*""FUNC COMMENT END""*********************************************************/
void Lcd12864_clear_lcd(void)
{
	while(Lcd12864_is_busy());                   /* wait for busy flag free           */
    _lcd12864__wr_creg(CMD_CLEAR);   			/* clear display                       */
}

/*""FUNC COMMENT""*************************************************************
* ID         		: ---
* Function name     : void set_cursol(int x, int y)
* Function     		: set cursol position
* Paramenter   		: int x : X axis
*					: int y : Y axis
* Return 	 		: none
* Function used		: Lcd12864_write_creg(char) : write command to LCD (8bit)
*					: Lcd12864_is_busy(void)	: wait for busy flag free
* Notice	   		: none
* History    		: ---
*""FUNC COMMENT END""*********************************************************/
void Lcd12864_set_cursol(int x, int y)
{
int a = Lcd12864_is_busy();
    while(Lcd12864_is_busy());	// wait for busy flag free

	switch(y)	// check the line number
	{
		case 3:
			_lcd12864__wr_creg(0x80 | (0x18 + x));
			break;
		case 2:
			_lcd12864__wr_creg(0x80 | (8 + x));
			break;
		case 1:
			_lcd12864__wr_creg(0x80 | (0x10 + x));
			break;
		case 0:
		default:
			_lcd12864__wr_creg(0x80 | x);
			
	}
}


/*""FUNC COMMENT""*************************************************************
* ID         		: ---
* Function name     : void Lcd12864_write_lcd(const char* msg)
* Function     		: write string to LCD
* Paramenter   		: const char* : address of string to write to LCD
* Return 	 		: none
* Function used		: Lcd12864_write_dreg(char) : write data to LCD (8bit)
*					: Lcd12864_is_busy(void)	: wait for busy flag free
* Notice	   		: none
* History    		: ---
*""FUNC COMMENT END""*********************************************************/
void Lcd12864_write_lcd(const char *msg)
{
    for( ; '\0' != *msg; msg++){
        while(Lcd12864_is_busy());
        _lcd12864__wr_dreg(*msg);
    }
}

/*""FUNC COMMENT""*************************************************************
* ID         		: ---
* Function name     : void Lcd12864_write_lcd_char(const char msg)
* Function     		: write a character to LCD
* Paramenter   		: const char : character to write to LCD
* Return 	 		: none
* Function used		: Lcd12864_write_dreg(char) : write data to LCD (8bit)
*					: Lcd12864_is_busy(void)	: wait for busy flag free
* Notice	   		: none
* History    		: ---
*""FUNC COMMENT END""*********************************************************/
void Lcd12864_write_lcd_char(const char msg)
{
	while(Lcd12864_is_busy());
	_lcd12864__wr_dreg(msg);
}

/*""FUNC COMMENT""*************************************************************
* ID         		: ---
* Function name     : int Lcd12864_is_busy(void)
* Function     		: check busy flag
* Paramenter   		: none
* Return 	 		: int : state of busy flag
* Function used		: Lcd12864_read_creg() : read command from LCD
* Notice	   		: none
* History    		: ---
*""FUNC COMMENT END""*********************************************************/
int Lcd12864_is_busy(void)
{
	int a = _lcd12864__rd_creg();

    if(0x80 & _lcd12864__rd_creg()){                     /* if(BusyFlag)             */
        return TRUE;
    }
    else{
        return FALSE;
    }
}


/*""FUNC COMMENT""*************************************************************
* ID         		: ---
* Function name     : void Lcd12864_light_on(void)
* Function     		: light background
* Paramenter   		: none
* Return 	 		: none
* Function used		: none
* Notice	   		: none
* History    		: ---
*""FUNC COMMENT END""*********************************************************/
void Lcd12864_light_on(void)
{
	p10_7 = 1;
}

/*""FUNC COMMENT""*************************************************************
* ID         		: ---
* Function name     : void Lcd12864_light_off(void)
* Function     		: unlight background
* Paramenter   		: none
* Return 	 		: none
* Function used		: none
* Notice	   		: none
* History    		: ---
*""FUNC COMMENT END""*********************************************************/
void Lcd12864_light_off(void)
{
	p10_7 = 0;
}