Launchpad的温度测量及串口发送
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1 #include "msp430g2553.h"
2
3 void sendChar(unsigned char c)
4 {
5 while(!(IFG2&UCA0TXIFG));
6 UCA0TXBUF=c;
7 }
8
9 void sendStr(unsigned char *s)
10 {
11 while(*s!=' ')
12 {
13 sendChar(*s);
14 s++;
15 }
16 }
17
18 void main(void)
19
20 {
21
22 unsigned char i;
23 unsigned char temp;
24 unsigned long tempAverage;
25 unsigned long tempMeasured[8];
26
27 WDTCTL = WDTPW + WDTHOLD; // Stop WDT
28
29 BCSCTL1 = CALBC1_1MHZ; // Set DCO
30 DCOCTL = CALDCO_1MHZ;
31 BCSCTL2 &= ~(DIVS_3);
32
33
34 P1SEL = BIT1 + BIT2 ; // P1.1 = RXD, P1.2=TXD
35 P1SEL2 = BIT1 + BIT2 ; // P1.1 = RXD, P1.2=TXD
36
37 UCA0CTL1 |= UCSSEL_2; // SMCLK
38 UCA0BR0 = 104; // 1MHz 9600
39 UCA0BR1 = 0; // 1MHz 9600
40 UCA0MCTL = UCBRS0; // Modulation UCBRSx = 1
41 UCA0CTL1 &= ~UCSWRST; // **Initialize USCI state machine**
42
43 //IE2 |= UCA0RXIE; // Enable USCI_A0 RX interrupt
44
45 ADC10CTL1 = INCH_10 + ADC10DIV_3; // Temp Sensor ADC10CLK/4 选择内部温度传感器通道，4分频
46 ADC10CTL0 = SREF_1 + ADC10SHT_3 + REFON + ADC10ON ;
47 __delay_cycles(1000); // Wait for ADC Ref to settle
48 ADC10CTL0 |= ENC + ADC10SC;
49
50 _EINT();
51
52 sendStr("n======== LaunchPad 温度计=======n");
53
54 //__bis_SR_register(LPM0_bits + GIE); // Enter LPM0, interrupts enabled
55
56
57 while(1)
58 {
59 if(i>7)
60 {
61 tempAverage=0;
62 for(;i>0;i--)
63 tempAverage+=tempMeasured[i-1];
64 tempAverage >>= 3;
65 temp=(unsigned char)( ((tempAverage - 630) * 761) / 1024 );
66 sendStr("n 华氏温度：");
67 sendChar(temp%100/10+48);
68 sendChar(temp%10+48);
69 sendStr(" | 摄氏温度：");
70 temp=(temp-32)*5/9;
71 sendChar(temp%100/10+48);
72 sendChar(temp%10+48);
73 sendChar('n');
74
75 }
76 else
77 {
78 ADC10CTL0 |= ENC + ADC10SC; // Sampling and conversion start 抽样及转换
79 tempMeasured[i]=ADC10MEM;
80 i++;
81 }
82
83 __delay_cycles(100000);
84
85
86 }
87 }
88
89 // Echo back RXed character, confirm TX buffer is ready first
90 /*
91 #pragma vector=USCIAB0RX_VECTOR
92 __interrupt void USCI0RX_ISR(void)
93 {
94 while (!(IFG2&UCA0TXIFG)); // USCI_A0 TX buffer ready?
95 UCA0TXBUF = UCA0RXBUF; // TX -> RXed character
96 }
97
98 */
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