msp430计算器程序

1、#include #define uchar unsigned char#define uint unsigned int#define CLR_RS P5OUT&=BIT5;#define SET_RS P5OUT|=BIT5;#define CLR_RW P5OUT&=BIT6;#define SET_RW P5OUT|=BIT6;#define CLR_EN P5OUT&=BIT7;#define SET_EN P5OUT|=BIT7;uchar number;uchar flag=0;uchar h=0;uchar code=+-*/=;uchar num=0xe0,0xd0,0xb0

2、,0x70;void delayms(uint c) uint a; uint b; for(a=0;ac;a+) for(b=0;b1678;b+);void enable() P4DIR&=0; CLR_RS; SET_RW; delayms(20); SET_EN; delayms(20); while(P4IN&0X80)!=0); /检测忙信号标志； CLR_EN; P4DIR|=0XFF; void int_clk() uchar i; BCSCTL1&=XT2OFF; /打开XT振荡器； BCSCTL2|=SELM1+SELS; do IFG1&=OFIFG; /清除振荡错误标志

3、； for(i=0;i100;i+) _NOP(); while(IFG1&OFIFG)!=0); IFG1&=OFIFG; /*写指令*/void write_com(uchar com) enable(); /检测忙信号； CLR_RS; CLR_RW; delayms(20); P4OUT=com; CLR_EN; delayms(20); SET_EN; delayms(20); CLR_EN;/*写数据*/void write_data(uchar data) enable(); /检测忙信号； SET_RS; CLR_RW; delayms(20); P4OUT=data; CLR

4、_EN; delayms(20); SET_EN; delayms(20); CLR_EN;void init() write_com(0x38); write_com(0x0f); write_com(0x06); write_com(0x01); void scan() static uint data1,data2,m,sign_2,sign_3,done; uchar i; for(i=0;i4;i+) P1OUT = numi; if(P1IN & 0X0F) != 0X0F ) delayms(5); if(P1IN & 0X0F) != 0X0F ) switch(P1IN &

5、0X0F) case 0x0e:flag+; number = i * 4 + 0;break; case 0x0d:flag+; number = i * 4 + 1;break; case 0x0b:flag+; number = i * 4 + 2;break; case 0x07:flag+; number = i * 4 + 3;break; if(flag = 1) sign_2 = sign_3 =done=0; if(flag=1) if(number=10)|(number=11)|(number=12)|(number=13)|(number=14) flag=0; els

6、e data1=number; write_data(codenumber); if(flag=2) if(number=10)|(number=11)|(number=12)|(number=13)|(number=14) m=codenumber; sign_2 = 1; write_data(codenumber); else if(number=9) data1=data1*10+number; write_data(codenumber); if(flag=3) if(sign_2 = 1) data2=number; write_data(codenumber); else if(

7、number=10)|(number=11)|(number=12)|(number=13)|(number=14) m=codenumber; sign_3 = 1; write_data(codenumber); if(flag=4) if(sign_2 = 1) if(number=14) done = 1; if(number =9) data2=data2*10+number; write_data(codenumber); if(sign_3 = 1) data2=number; write_data(codenumber); if(flag=5) if(sign_2 = 1) i

8、f(number=14) done = 1; if(sign_3 = 1) if(number=14) done = 1; else if (numberdata2) write_data(code(data1-data2)/100); write_data(code (data1-data2)/10); write_data(code (data1-data2)%10 ); else write_data(-); write_data(code(data2-data1)/100); write_data(code(data2-data1)/10); write_data(code(data2

9、-data1)%10 ); if(m=code12) write_data(code(data1*data2)/1000); write_data(code (data1*data2)/100)%10); write_data(code (data1*data2)/10)%10); write_data(code (data1*data2)%10 ); if(m=code13) if(data1=data2) write_data(code(data1*100)/data2)/1000); write_data(code(data1*100)/data2)%1000)/100); write_data(. ); write_data(code (data1*100)/data2)%100)/10); write_data(code (data1*100)/data2)%100)%10); if(data1data2) write_data(0); write_data(. ); write_data(code (data1*1000)/data2)/100); write_data(code (data1*1000)/data2)/100)/10); if(number=15) write_com(0x01); flag=0; sign_2 = sign_3 =done=0