MSP430G2553外部电压采集.doc

//****************************************************************************** // LaunchPad Lab5 - ADC10, Sample A10 Temp and Convert to oC and oF // // MSP430G2452 // ----------------- // /|\| XIN|- // | | | // --|RST XOUT|- // | | // |A10 | // //****************************************************************************** #include msp430g2452.h #include tm1638.h float temp,temp1; float IntDegF; unsigned char LED_CODE[] = { 0x3F, 0x06, 0x5B, 0x4F, 0x66, 0x6D, 0x7D, 0x07, 0x7F, 0x6F, 0x77, 0x7C, 0x39, 0x5E, 0x79, 0x71 }; void main(void) { WDTCTL = WDTPW + WDTHOLD; // Stop WDT unsigned int i,j,k,h=0; //,l if (CALBC1_8MHZ == 0xFF || CALDCO_8MHZ == 0xFF) { while (1); // If calibration constants erased, trap CPU!! } BCSCTL1 = CALBC1_8MHZ; // Set range DCOCTL = CALDCO_8MHZ; // Set DCO step + modulation BCSCTL2 = SELM_1 + DIVM_3; //set MCLK=DOC/8 P1DIR = ~BIT0; // P1.0 input P1REN |= BIT0; P2DIR = 0xFF; // P2 output P2OUT = 0xFF; init_TM1638(); //Configure ADC10配置adc10 ADC10CTL1 = INCH_0+ ADC10DIV_3; // Choose ADC Channel as Temp Sensor ADC10CTL0 = SREF_1 + ADC10SHT_3 + REF2_5V+REFON + ADC10ON + ADC10IE; //Choose ADC Ref source __disable_interrupt(); while(1) { ADC10CTL0 |= ENC + ADC10SC; // Sampling and conversion start __bis_SR_register(LPM0_bits + GIE); // LPM0 with interrupts enabled temp =ADC10MEM; ADC10CTL0 = ~ENC; IntDegF=temp*2.5/1023.0; //内部参考电压为2.5V temp1+=IntDegF; h++; if(h==10) //采1000组数取平均 { h=0; temp1=temp1/10.0; i=temp1*100.0/100; j=(unsigned int)(temp1*100.0)%100/10; k=(unsigned int)(temp1*100.0)%10; Write_DATA(10,LED_CODE[i]+0x80); Write_DATA(12,LED_CODE[j]); Write_DATA(14,LED_CODE[k]); temp1=0; } __no_operation(); // SET BREAKPOINT HERE } } // ADC10 int