msp430g2553的串口发送且1602显示程序.doc

#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 char command); void LCD_write_data(unsigned char data); void LCD_set_xy (unsigned char x, unsigned char y); void LCD_write_string(unsigned char X,unsigned char Y, unsigned char s); void LCD_write_char(unsigned char X,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 (!(IFG2UCA0TXIFG)); // 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; // SMCLK 1MHz 115200 8 UCA0BR1 = 0; // 1MHz 115200 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_nm