LCD_driver.rar_LCD driver

/*==============================硬件连接======================================== P4 输入/输出数据 P5.5-A0 P5.6-LCD_ENABLE P5.7-READ/WRITE ===============================================================================*/ #include "io430.h" #define LCD_DATA_IN P4IN #define LCD_DATA_OUT P4OUT #define LCD_COMMAND_OUT P4OUT #define LCD_DIR P4DIR #define LCD_READ P5OUT |= BIT7 #define LCD_WRITE P5OUT &= ~BIT7 #define LCD_ENABLE_H P5OUT |= BIT6 #define LCD_ENABLE_L P5OUT &= ~BIT6 #define LCD_DATA P5OUT |= BIT5 #define LCD_COMMAND P5OUT &= ~BIT5 void initCLK(); //初始化时钟 void initLCD(); //初始化LCD void initport(); //初始化端口 char LCD_busy(); //检测是否忙 void delay_us(); //延时 void delay_ms(); //延时 void clearLCD(unsigned char m); //擦除LCD void write_data(unsigned char DATA); //写数据 void write_command(unsigned char COMMAND); //写命令 void LCD_set_xy( unsigned char x, unsigned char y );//设定坐标 void LCD_write_string(unsigned char X,unsigned char Y,unsigned char *s); //写字符串 char *str1,*str2,*str3,*str4,*str5; //定义字符串指针 /*============================主函数==============================================*/ main( void ) { WDTCTL = WDTPW + WDTHOLD; // Stop watchdog timer to prevent time out reset str2="河北科技大学"; str3="信息学院"; str4="电科专业"; str5="凡夫俗子"; P6SEL &= 0x4; //板子上有D12和LCD共享数据线，初始化，防止冲突 P6DIR |= 0x4; //初始化D12的片选 P6OUT |=0x4; //使CS输出为高,否则为使数据线冲突 initCLK(); // 时钟初始化一定要有！！！ initport(); // 端口出事化一定要有！！！ initLCD(); delay_ms(1); write_command(0x01); //清屏 LCD_write_string(0,0,str2); //写字符串 LCD_write_string(0,1,str3); LCD_write_string(0,2,str4); LCD_write_string(0,3,str5); // while(1) { delay_ms(100); //个人设置 按需更改 clearLCD(0); delay_ms(1); //个人设置 按需更改 delay_ms(100); clearLCD(1); delay_ms(1); } return 0; } /*==================================时钟初始化=======================================*/ void initCLK() { unsigned char i; WDTCTL = WDTPW + WDTHOLD; //Stop WDT BCSCTL1 &= ~XT2OFF; //Enable high frequency oscillator 12M BCSCTL2 = SELM1 + SELS; //0X88 MCLK = SMCLK = 6M Hz do { IFG1 &= ~OFIFG; //Clear OSCFault flag for (i = 0xff; i > 0; i--); //Time for flag to set } while ((IFG1 & OFIFG) == OFIFG); //OSCFault flag still set? BCSCTL2 = SELM1 + SELS; //0X88 MCLK = SMCLK = 6M Hz } /*=================================LCD初始化=======================================*/ void initLCD() { write_command(0x01); delay_us(20); write_command(0x80); } /*================================busy检测==========================================*/ char LCD_busy() { char status; P4DIR = 0; LCD_ENABLE_L; LCD_COMMAND; LCD_READ; delay_us(2); LCD_ENABLE_H; delay_us(2); status = P4IN&BIT7; LCD_ENABLE_L; P4DIR = 0XFF; return status; } /*=================================写命令==============================================*/ void write_command(unsigned char COMMAND) { while(LCD_busy()); P4DIR=0xff; P5DIR=0xff; LCD_ENABLE_L; LCD_COMMAND; LCD_WRITE; delay_us(2); LCD_ENABLE_H; LCD_COMMAND_OUT = COMMAND; delay_us(2); LCD_ENABLE_L; } /*==================================写数据==============================================*/ void write_data(unsigned char DATA) { while(LCD_busy()); P4DIR=0xff; P5DIR=0xff; LCD_ENABLE_L; LCD_DATA; LCD_WRITE; delay_us(2); LCD_ENABLE_H; LCD_COMMAND_OUT = DATA; delay_us(2); LCD_ENABLE_L; } /*===================================擦除===============================================*/ void clearLCD(unsigned char m) { unsigned char count; if(m==0) count = 0xff; //绘图区写入0xff 汉字反显 else count = 0x00; //绘图区写入0x00 汉字正常 int i,j; for(j=0;j<64;j++) { if(j<32) { write_command(0x36); write_command(0x80+j); //行地址 write_command(0x80); //列地址 write_command(0x30); for(i=0;i<16;i++) { delay_ms(100); write_data(count); } } else { write_command(0x36); write_command(0x80+j-32); //行地址 write_command(0x88); //列地址 write_command(0x30); for(i=0;i<16;i++) { delay_ms(100); write_data(count); } } } } /*======================================延时===========================================*/ void delay_us(int time) { do { time--; } while(time>1); } void delay_ms(unsigned int time) { while(time != 0) { delay_us(100); time--; } } /*========================================端口============================================*/ void initport() { P4SEL = 0; P5SEL = 0; P4DIR = 0XFF; P5DIR = 0XFF; } /*=======================================设定位置=========================================*/ void LCD_set_xy( unsigned char x, unsigned char y ) { unsigned char address; switch(y){ case 0: address = 0x80 + x; break; case 1: address = 0x90 + x; break; case 2: address = 0x88 + x; break; case 3: address = 0x98 + x; break; default:address = 0x80 + x;} write_command( address); } /*======================================写字符串=========================================*/ void LCD_write_string(unsigned char X,unsigned char Y,unsigned char *s) { LCD_set_xy( X, Y ); while (*s) { write_data( *s ); s ++; delay_ms(1000); } }