1 #include "io430g2553.h"
2
3 unsigned char Disp_Tab[] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x40}; //段码控制
4 unsigned char dispbit[8]={0xfe,0xfd,0xfb,0xf7,0xef,0xdF,0xbF,0x7F}; //位选控制
5
6 unsigned char LedOut[4];
7
8 unsigned int num =1234;
9 unsigned int time;
10 unsigned char i;
11
12 unsigned char RxFlag;
13 unsigned char Byte_H;
14 unsigned char Byte_L;
15
16 void selectled(unsigned char led)
17 {
18 switch(led)
19 {
20 case 0:
21 P2OUT_bit.P5=0;
22 P1OUT_bit.P6=1;
23 P1OUT_bit.P7=1;
24 break;
25 case 1:
26 P2OUT_bit.P5=1;
27 P1OUT_bit.P6=0;
28 P1OUT_bit.P7=1;
29 break;
30 case 2:
31 P2OUT_bit.P5=1;
32 P1OUT_bit.P6=1;
33 P1OUT_bit.P7=0;
34 break;
35 default:
36 P2OUT_bit.P5=1;
37 P1OUT_bit.P6=1;
38 P1OUT_bit.P7=1;
39 break;
40 }
41 }
42
43 void showled(unsigned char led)
44 {
45
46 if(led & 0x01) P1OUT_bit.P3=1;
47 else P1OUT_bit.P3=0;
48
49 if(led & 0x02) P1OUT_bit.P4=1;
50 else P1OUT_bit.P4=0;
51
52 if(led & 0x04) P1OUT_bit.P5=1;
53 else P1OUT_bit.P5=0;
54
55 if(led & 0x08) P2OUT_bit.P0=1;
56 else P2OUT_bit.P0=0;
57
58 if(led & 0x10) P2OUT_bit.P1=1;
59 else P2OUT_bit.P1=0;
60
61 if(led & 0x20) P2OUT_bit.P2=1;
62 else P2OUT_bit.P2=0;
63
64 if(led & 0x40) P2OUT_bit.P3=1;
65 else P2OUT_bit.P3=0;
66
67 if(led & 0x80) P2OUT_bit.P4=1;
68 else P2OUT_bit.P4=0;
69
70 }
71
72 int putchar(int ch)
73 {
74 while(!(IFG2&UCA0TXIFG));
75 UCA0TXBUF=ch;
76 return ch;
77 }
78
79
80 void sendChar(unsigned char c)
81 {
82 while(!(IFG2&UCA0TXIFG));
83 UCA0TXBUF=c;
84 }
85
86 void main()
87 {
88
89 WDTCTL = WDTPW + WDTHOLD; // Stop watchdog timer
90
91 P1DIR=0xff;
92 P2DIR=0xff;
93
94 P1SEL = BIT1 + BIT2 ; // P1.1 = RXD, P1.2=TXD
95 P1SEL2 = BIT1 + BIT2 ; // P1.1 = RXD, P1.2=TXD
96 UCA0CTL1 |= UCSSEL_2; // SMCLK
97 UCA0BR0 = 104; // 1MHz 9600
98 UCA0BR1 = 0; // 1MHz 9600
99 UCA0MCTL = UCBRS0; // Modulation UCBRSx = 1
100 UCA0CTL1 &= ~UCSWRST; // **Initialize USCI state machine**
101 IE2 |= UCA0RXIE; // Enable USCI_A0 RX interrupt
102 __bis_SR_register(GIE);
103
104
105 while(1)
106 {
107
108 time++;
109 if(time>50)
110 {
111 time=0;
112 sendChar(0x55);
113 __delay_cycles(1000);
114 if(num>500) P1OUT_bit.P0=1;
115 else P1OUT_bit.P0=0;
116 }
117 LedOut[3]=Disp_Tab[num%10000/1000]; //千位
118 LedOut[2]=Disp_Tab[num%1000/100];
119 LedOut[1]=Disp_Tab[num%100/10]; //十位
120 LedOut[0]=Disp_Tab[num%10]; //个位
121
122 for(i=0;i<4;i++)
123 {
124 showled(LedOut[i]);
125 selectled(i);
126 __delay_cycles(1000);
127 }
128 }
129
130 }
131
132 #pragma vector=USCIAB0RX_VECTOR
133 __interrupt void USCI0RX_ISR(void)
134 {
135
136 while (!(IFG2&UCA0TXIFG)); // USCI_A0 TX buffer ready?
137
138 if(RxFlag == 0)
139 {
140 Byte_H=UCA0RXBUF;
141 RxFlag=1;
142 }
143 else
144 {
145 Byte_L=UCA0RXBUF;
146 num=Byte_H*256+Byte_L;
147 RxFlag = 0;
148 }
149 }
