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#include <msp430g2553.h> #include <intrinsics.h> #include <msp430.h> #define uint unsigned int #define LCD_EN_PORT P1OUT //以下2个要设为同一个口 #define LCD_EN_DDR P1DIR #define LCD_RS_PORT P1OUT //以下2个要设为同一个口 #define LCD_RS_DDR P1DIR #define LCD_DATA_PORT P2OUT //以下3个要设为同一个口 #define LCD_DATA_DDR P2DIR //一定要用高4位 #define LCD_RS BIT6 #define LCD_EN BIT7 #define LCD_DATA BIT7|BIT6|BIT5|BIT4 //4位数据线连接模式 void LCD_init(void); void LCD_init_first(void); void LCD_en_write1(void); //上升沿使能 void LCD_en_write2(void); //下降沿使能 void LCD_write_command(unsigned charcommand); void LCD_write_data(unsigned char data); void LCD_set_xy (unsigned char x, unsignedchar y); void LCD_write_string(unsigned charX,unsigned char Y, unsigned char s); void LCD_write_char(unsigned charX,unsigned char Y, unsigned char data); void delay_1ms(void); void delay_nus(unsigned int n); void delay_nms(unsigned int n); unsigned char rev; void putchar(unsigned char c) //发送字符函数 { while (!(IFG2&UCA0TXIFG)); // USCI_A0 TX buffer ready? 等待TX buffer为空 UCA0TXBUF = c; // TX ->RXed character 发送字符c } void putstr(char *s) //发送字符串函数 { IE2 &= ~UCA0RXIE; //发送时先关闭接收中断，不接收 while((*s)!='\0') //如果没有发完，就继续循环发送 { putchar(*s); putchar('\n'); //发送换行符 s++; } IE2 |= UCA0RXIE; //发送完了打开接收中断 } void Init_USTAR(void) { BCSCTL1 =CALBC1_1MHZ; // Set DCO为1MHz DCOCTL =CALDCO_1MHZ; P1SEL = BIT1 + BIT2; // P1.1 =RXD, P1.2=TXD P1SEL2 = BIT1 + BIT2; //第二外围模式选择 UCA0CTL1 |= UCSSEL_2; // SMCLK 其他默认：软件复位使能 USCI逻辑保持在复位状态，用于设置串口 UCA0BR0 = 8; // SMCLK1MHz 115200 8 UCA0BR1 = 0; // 1MHz115200 UCA0MCTL = UCBRS2 + UCBRS0; UCA0CTL1 &= ~UCSWRST; IE2|= UCA0RXIE; // 接收中断使能 } void main()//主函数 { WDTCTL = WDTPW + WDTHOLD; // 关闭看门狗 LCD_init_first(); LCD_init(); Init_USTAR(); _BIS_SR(LPM3_bits+GIE); // Enter LPM0, interrupts enabled } // LCD液晶操作函数 void LCD_init_first(void) //LCD1602液晶初始化函数（热启动） { delay_nms(500); LCD_DATA_DDR|=LCD_DATA; //数据口方向为输出 LCD_EN_DDR|=LCD_EN; //设置EN方向为输出 LCD_RS_DDR|=LCD_RS; //设置RS方向为输出 delay_nms(50); LCD_write_command(0x30); delay_nms(50); LCD_write_command(0x30); delay_nms(5); LCD_write_command(0x30); delay_nms(500); } //LCD1602液晶初始化函数 void LCD_init(void) { delay_nms(500); LCD_DATA_DDR|=LCD_DATA; //数据口方向为输出 LCD_EN_DDR|=LCD_EN; //设置EN方向为输出 LCD_RS_DDR|=LCD_RS; //设置RS方向为输出 delay_nms(500); LCD_write_command(0x28); //4位数据接口 delay_nms(50); LCD_write_command(0x28); //4位数据接口 delay_nms(50); LCD_write_command(0x28); //4位数据接口 delay_nms(50); LCD_en_write2(); delay_nms(50); LCD_write_command(0x28); //4位数据接口 delay_nms(500); LCD_write_command(0x01); //清屏 LCD_write_command(0x0c); //显示开，关光标，不闪烁 LCD_write_command(0x06); //设定输入方式，增量不移位 delay_nms(50); } //液晶使能上升沿 void LCD_en_write1(void) { LCD_EN_PORT&=~LCD_EN; delay_nus(10); LCD_EN_PORT|=LCD_EN; } //液晶使能下降沿 void LCD_en_write2(void) { LCD_EN_PORT|=LCD_EN; delay_nus(10); LCD_EN_PORT&=~LCD_EN; } //写指令函数 void LCD_write_command(unsigned charcommand) { delay_nus(16); P2SEL=0x00; LCD_RS_PORT&=~LCD_RS; //RS=0 LCD_en_write1(); LCD_DATA_PORT&=0X0f; //清高四位 LCD_DATA_PORT|=command&0xf0; //写高四位 delay_nus(16); LCD_en_write2(); command=command<<4; //低四位移到高四位 LCD_en_write1(); LCD_DATA_PORT&=0x0f; //清高四位 LCD_DATA_PORT|=command&0xf0; //写低四位 LCD_en_write2(); } //写数据函数 void LCD_write_data(unsigned char data) { delay_nus(16); P2SEL=0x00; LCD_RS_PORT|=LCD_RS; //RS=1 LCD_en_write1(); //E上升沿 LCD_DATA_PORT&=0X0f; //清高四位 LCD_DATA_PORT|=data&0xf0; //写高四位 delay_nus(16); LCD_en_write2(); data=data<<4; //低四位移到高四位 LCD_en_write1(); LCD_DATA_PORT&=0X0f; //清高四位 LCD_DATA_PORT|=data&0xf0; //写低四位 LCD_en_write2(); } //写地址函数 void LCD_set_xy( unsigned char x, unsignedchar y ) { unsigned char address; if (y == 0) address = 0x80 + x; else address = 0xc0 + x; LCD_write_command( address); } //LCD在任意位置写字符串，列x=0~15,行y=0,1 void LCD_write_string(unsigned charX,unsigned char Y,unsigned char s) { LCD_set_xy( X, Y ); //写地址 LCD_write_data( s ); } //LCD在任意位置写字符,列x=0~15,行y=0,1 void LCD_write_char(unsigned charX,unsigned char Y,unsigned char data) { LCD_set_xy( X, Y ); //写地址 LCD_write_data( data); } //1us延时函数 void delay_1us(void) { asm("nop"); } //N us延时函数 void delay_nus(unsigned int n) { unsigned int i; for(i=0;i<n;i++) delay_1us(); } //1ms延时函数 void delay_1ms(void) { unsigned int i; for (i=0;i<1140;i++); } //N ms延时函数 void delay_nms(unsigned int n) { unsigned int i=0; for (i=0;i<n;i++) delay_1ms(); } #pragma vector=USCIAB0RX_VECTOR __interrupt void USCI0RX_ISR(void) { while (!(IFG2&UCA0TXIFG)); // USCI_A0 TX buffer ready? 等待TX buffer为空 UCA0TXBUF = UCA0RXBUF; //TX -> RXed character 发送接收到是数据 rev=UCA0RXBUF; putchar(rev); LCD_write_string(0,0,rev); delay_nms(10); }
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