1 | #include <msp430x14x.h>
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2 | #include <math.h>
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3 | #include <inttypes.h>
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4 |
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5 | unsigned int i=0;
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6 | unsigned long long int SUM_SIG1,SUM_SIG2,SUM_SIG3,SUMT_SIG1,SUMT_SIG2,SUMT_SIG3;
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7 | unsigned int RMS_SIG1,RMS_SIG2,RMS_SIG3;
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8 | unsigned long int MW_SIG1,MW_SIG2,MW_SIG3,Modulus_quadrature;
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9 | unsigned int Modulus;
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10 | int Measure;
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11 |
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12 | static unsigned julery_isqrt(unsigned long val) {
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13 | unsigned long temp, g=0, b = 0x8000, bshft = 15;
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14 | do {
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15 | if ( val >= ( temp = (((g << 1) + b)<<bshft--) ) ) {
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16 | g += b;
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17 | val -= temp;
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18 | }
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19 | } while (b >>= 1);
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20 | return g;
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21 | }
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22 |
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23 | void main(void)
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24 | {
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25 | WDTCTL = WDTPW + WDTHOLD; // Stop WDT
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26 | DCOCTL = DCO0 + DCO1 + DCO2; //Max. CLK
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27 | BCSCTL1 |= RSEL0 + RSEL1 + RSEL2;
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28 | P4DIR |= 0xFF; // P4.0 output
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29 | P4OUT=0; //Reset Outputs
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30 | //P5SEL |= 0xFF; //MCLK Rausführen
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31 | P5DIR |= 0xFF;
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32 | P5OUT=0;
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33 | CCTL0 = CCIE; // CCR0 interrupt enabled
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34 | CCR0 = 3; //32768/4 =8192
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35 | TACTL = TASSEL_1 + MC_1; // ACLK, upmode
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36 | MW_SIG1=0;
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37 | MW_SIG2=0;
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38 | MW_SIG3=0;
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39 | RMS_SIG1=0;
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40 | RMS_SIG2=0;
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41 | RMS_SIG3=0;
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42 | SUM_SIG1=0;
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43 | SUM_SIG2=0;
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44 | SUM_SIG3=0;
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45 | SUMT_SIG1=0;
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46 | SUMT_SIG2=0;
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47 | SUMT_SIG3=0;
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48 | Modulus_quadrature=0;
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49 | Modulus=0;
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50 | Modulus_quadrature=0;
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51 | Measure=0;
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52 | _BIS_SR(LPM0_bits + GIE); // Enter LPM0 w/ interrupt I=85uA
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53 | while(1){
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54 | if(Measure==1){
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55 | P5OUT=0xFF; //HIER KOMMT IMMER NULL RAUS
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56 | MW_SIG1=SUMT_SIG1>>13; //Mean of RMS /j=8192 =>2^13
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57 | MW_SIG2=SUMT_SIG2>>13;
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58 | MW_SIG3=SUMT_SIG3>>13;
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59 | RMS_SIG1=julery_isqrt(MW_SIG1); //sqrt of RMS
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60 | RMS_SIG2=julery_isqrt(MW_SIG2);
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61 | RMS_SIG3=julery_isqrt(MW_SIG3);
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62 | SUMT_SIG1=0;
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63 | SUMT_SIG2=0;
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64 | SUMT_SIG3=0;
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65 | Measure=0;
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66 | Modulus_quadrature=RMS_SIG1*RMS_SIG1+RMS_SIG2*RMS_SIG2+RMS_SIG3*RMS_SIG3;
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67 | Modulus=julery_isqrt(Modulus_quadrature);
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68 | P5OUT=0x00;
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69 | }else{}
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70 | };
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71 | }
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72 |
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73 | // Timer A0 interrupt service routine
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74 | #pragma vector=TIMERA0_VECTOR
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75 | __interrupt void Timer_A (void)
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76 | {
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77 | P4OUT ^= 0xFF; // Toggle P1.0
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78 | P6SEL |= 0x70; // Enable A/D channel A0
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79 | ADC12CTL0 = ADC12ON+SHT0_0+MSC; // Turn on ADC12, set sampling time
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80 | ADC12CTL1 = ADC12DIV_0+ADC12SSEL_3+CONSEQ_1+SHP; // Use sampling timer, set mode
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81 | ADC12MCTL0 = INCH_4+SREF_0; // channel = A4
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82 | ADC12MCTL1 = INCH_5+SREF_0; // channel = A5
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83 | ADC12MCTL2 = INCH_6+EOS+SREF_0; // channel = A6
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84 | ADC12IE = 0x01; // Enable ADC12IFG.6
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85 | ADC12CTL0 |= ENC; // Enable conversions
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86 | ADC12CTL0 |= ADC12SC; // Start conversion
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87 | i++;
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88 | }
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89 |
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90 | #pragma vector=ADC12_VECTOR
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91 | __interrupt void ADC12ISR (void)
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92 | {
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93 | unsigned long int ADC_SIG1,ADC_SIG2,ADC_SIG3;
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94 | //P5OUT=0xFF;
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95 | //TACTL = TASSEL_1 + MC_1; TimerA off
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96 | if(i<8192){
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97 | ADC_SIG1=ADC12MEM0;
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98 | ADC_SIG2=ADC12MEM1;
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99 | ADC_SIG3=ADC12MEM2;
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100 | SUM_SIG1 += ADC_SIG1 * ADC_SIG1; //Sum over quadrature
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101 | SUM_SIG2 += ADC_SIG2 * ADC_SIG2;
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102 | SUM_SIG3 += ADC_SIG3 * ADC_SIG3;
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103 |
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104 | //P5OUT=0x00;
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105 | }else{
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106 | //ADC_SIG1=ADC12MEM0;
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107 | SUMT_SIG1=SUM_SIG1;
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108 | SUMT_SIG2=SUM_SIG2;
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109 | SUMT_SIG3=SUM_SIG3;
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110 | SUM_SIG1=0;
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111 | SUM_SIG2=0;
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112 | SUM_SIG3=0;
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113 | Measure=1;
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114 | i=0;
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115 | __low_power_mode_off_on_exit(); //I=300uA
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116 | }
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117 | //P5OUT=0x00;
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118 | ADC12CTL0 &= ~ENC; // Enable conversions
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119 | }
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