proteus仿真四个外部中断按键+1602液晶.docx

1、proteus仿真四个外部中断按键+1602液晶Proteus仿真外部中断，共4个按键，控制1602液晶显示，基于MSP430F249程序1（库文件KU.h）：/*/*/延时设置/*#define CPU_F (double)4000000) /主时钟的频率4MHz#define delay_us(x) _delay_cycles(long)(CPU_F*(double)x/1000000.0)#define delay_ms(x) _delay_cycles(long)(CPU_F*(double)x/1000.0)#define RS0 P3OUT &= BIT0#define RS1 P

2、3OUT |= BIT0#define RW0 P3OUT &= BIT1#define RW1 P3OUT |= BIT1#define EN0 P3OUT &= BIT2#define EN1 P3OUT |= BIT2/*/时钟设置/*/驱动1602*void LCD_write_com(unsigned char com) RS0; RW0; EN0; P1OUT = com; delay_ms(1); EN1; delay_ms(1); EN0; void LCD_write_data(unsigned char data) RS1; RW0; EN0; P1OUT = data;

3、delay_ms(1); EN1; delay_ms(1); EN0;void LCD_clear(void) LCD_write_com(0x01); delay_ms(1);void LCD_write_str(unsigned char x,unsigned char y,unsigned char *s) if (y = 0) LCD_write_com(0x80 + x); else LCD_write_com(0xC0 + x); while (*s) LCD_write_data( *s); s +; void LCD_write_char(unsigned char x,uns

4、igned char y,unsigned char data) if (y = 0) LCD_write_com(0x80 + x); else LCD_write_com(0xC0 + x); LCD_write_data( data); void LCD_init(void) EN0; delay_ms(1); LCD_write_com(0x38); delay_ms(1); LCD_write_com(0x0C); delay_ms(1); LCD_write_com(0x06); delay_ms(1); LCD_write_com(0x01); delay_ms(1); 程序2：

5、主文件#include #include KU.hunsigned char A1;unsigned char A2;unsigned char B1;unsigned char B2;unsigned char MENU; #pragma vector = PORT2_VECTOR_interrupt void P21_IRQ(void) switch(P2IFG&0x0f) case 0x01: / 菜单 if(MENU=0) A1=0; A2=0; B1=0x00; B2=0; LCD_clear(); LCD_write_str(0,0,menu:); LCD_write_char(0

6、x0e,1,0x30+A1); LCD_write_char(0x0f,1,0x30+A2); P2IFG = 0x00; MENU=1; else MENU=0; P2IFG = 0x00; break; case 0x02: /置数 if(MENU=1) if(B1&0x01)=0x00) if(A1=9) A1=0; else A1+; if(B1&0x01)=0x01) if(A2=9) A2=0; else A2+; LCD_write_char(0x0e,1,0x30+A1); LCD_write_char(0x0f,1,0x30+A2); P2IFG = 0x00; break;

7、 case 0x04: /移位 if(MENU=1) B1=B1; LCD_write_char(0x0e,1,0x30+A1); LCD_write_char(0x0f,1,0x30+A2); P2IFG = 0x00; break; case 0x08: /确认 if(MENU=1) if(A1=2)&(A2=5) LCD_clear(); LCD_write_str(0,0,lmnop:); MENU=2; P2IFG = 0x00; break; int main( void ) WDTCTL = WDTPW + WDTHOLD; P1SEL = 0x00; P1DIR = 0xFF;

8、 /P1液晶数据 P3SEL = 0x00; P3DIR|= BIT0+BIT1+BIT2; /P3液晶控制 delay_ms(100); P2SEL = 0x00; /P1普通IO功能 P2DIR = 0xf0; /P1。0P13。3输入模式，外部电路已接上拉电阻 P2IE = 0x0f; /开启P1低四位中断 P2IES = 0x01; /下降沿触发中断 P2IFG = 0x00; _EINT(); LCD_init(); LCD_clear(); while(1) if(MENU=0) LCD_clear(); LCD_write_str(0,0,The number:); LCD_write_str(0X08,1,1234.5); delay_ms(500);