lcd.c

tms320c2812的lcd驱动

#include	"DSP28_Device.h"
#define comm 0
#define dat  1

extern const unsigned char *ASCIITAB[];
extern const unsigned char *Welcome[];
const unsigned char disline[8] = {0xFF,0x7F,0x3F,0x1F,0x0F,0x07,0x03,0x01};


void  delay(unsigned int d_time)
{
	while(d_time--);
}


/*----------------LCD忙检测----------------*/
void chk_busy()
{
	unsigned int temp;
	LCD_REG = 0x06;//RS=0(comm), RW=1(read)
	temp = 0x0080;
	while((temp&0x0080)!=0)
	{
		temp = LCD_DAT;
	}
	//while((LCD_DAT&0x80)!=0); 
}


/*------------------写LCD------------------*/
void  wr_lcd(unsigned char dat_comm, unsigned int content)
{
	chk_busy();
	if(dat_comm)
	{
		LCD_REG = 0x05;//RS=1(data), RW=0(write)
	}
	else
	{
		LCD_REG = 0x04;//RS=0(comm), RW=0(write)
	}
	LCD_DAT = content;
}


/*----------------清DDRAM------------------*/
void clrram (void)
{
    wr_lcd (comm,0x30);
    wr_lcd (comm,0x01);
}


/*------------------初始化-----------------*/
void  lcd_init(void)
{
	LCD_REG = 0x03;//RESET
	delay(1000);
	LCD_REG = 0x04;
    wr_lcd (comm,0x30);  /*30---基本指令动作*/  
    wr_lcd (comm,0x01);  /*清屏，地址指针指向00H*/
    wr_lcd (comm,0x06);  /*光标的移动方向*/
    wr_lcd (comm,0x0c);  /*开显示，关游标*/		
}


/*---------------欢迎界面------------------*/
void Smenu()
{
	wr_lcd (comm,0x30);
	wr_lcd (comm,0x92);
	wr_lcd (dat,0xc3);          //"明"
	wr_lcd (dat,0xf7);
    wr_lcd (dat,0xce);          //"伟"
	wr_lcd (dat,0xb0);
    wr_lcd (dat,0xb5);          //"电"
	wr_lcd (dat,0xe7);
    wr_lcd (dat,0xd7);          //"子"
	wr_lcd (dat,0xd3);
}