MC9S12XS128单片机+1602液晶显示程序

1、#in elude /* com mon defi nes and macros */#in elude derivative/* derivative-specific defi niti ons 7#in elude MC9S12XS128.hM* *#defi ne LCD_E PORTA_PA2#defi ne LCD_RW PORTA_PA1 #defi ne LCD_RS PORTA_PAO #define LCD DATA PORTB void In it_PLL(void)日寸寸乍中酉己八置 *CLKSEL=0x00; 48mhzPLLCTL_PLLON=1;SYNR=0XC0

2、 | 0X05;REFDV=0X80|0X01;POSTDIV=OXOO;_asm (no p);_asm (no p);while(0=CRGFLG_LOCK); 锁相环锁定CLKSEL_PLLSEL=1; 选定外部时钟 void IO_I nit()DDRA=0XFF;DDRB=0XFF;DDRK=0XFF;PORTA=OXOO;PORTB=OXOO;PORTK=OXOO;/*日寸函*/void Delay (un sig ned int time) while(time-); void Delay_ms( un sig ned int z) un sig ned int a,b;for(

3、a=0;avz;a+)for(b=0;bv500;b+);*! vojd LCD WriteOommn nd(un sig ned char cmd) LCD_DATA=cmd; LCD_RS = 0; LCD_RW=0; LCD_E=0;Delay(250);LCD_E=1;*/ void LCD_WriteData( un it*sig ned char data) LCD_DATA=data;LCD_RS=1;LCD_RW=0;LCD_E=0;Delay(250);1602初始化函八数LCD_E=1;void LCD_I nit(void)LCD_DATA=0; LCD_WriteCom

4、ma nd(0x38); 显示模式设置/ Delay_ms(5000); LCD_WriteComma nd(0x38); 显示模式设置 Delay_ms(5000); LCD_WriteComma nd(0x38); 显示模式设置显示模式设置 关闭显示显 示清屏 Delay_ms(5000);LCD_WriteComma nd(0x38); LCD_WriteComma nd(0x08); LCD_WriteComma nd(0x01); Delay_ms(25);显小光标移动设置LCD_WriteComma nd(0x06); 显示开及光标设置LCD_WriteComma nd(OxOC)

5、;/舟*舟*舟*舟*void Display_char( un sig ned char x，un sig ned char y,un sig ned char data) y&=0x01;x&=OxOf; 限制x不能大于15, y不能大于1 /设置光标位置if(y=nx+=0x40;x+=0x80;LCD_WriteComma nd(x);显示单个字符LCD_WriteData(data); void Display_stri ng(un sig ned char x,un sig ned char y,un sig ned char *s)*显示字符串函数y&=0x01;x&=OxOf; 限制x不能大于15, y不能大于1设置光标位置if(Y=1)x+=0x40;x+=0x80;LCD_WriteComma nd(x); 显示字符串while(*s)LCD_WriteData(*s);s+;严十液晶显示函数it*/void mai n(void)un sig ned char p1=peopleup : un sig ned char p2=peopledow n; In it_PLL();10nit();LCD_I nit(); Delay_ms(50); for(;)Display_stri ng(0,0