1 | #include <msp430.h>
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2 |
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3 | //FRAM Variabeln Definieren
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4 | #pragma SET_DATA_SECTION(".fram_vars")
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5 | long umdrehung;
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6 | //Positionszustände
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7 | char pos;
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8 | char pos1;
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9 | char pos2;
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10 | #pragma SET_DATA_SECTION()
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11 |
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12 | volatile unsigned int i;
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13 | volatile unsigned int j;
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14 | volatile unsigned long temp = 0;
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15 |
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16 |
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17 | int main(void) {
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18 | WDTCTL = WDTPW | WDTHOLD; // Stop watchdog timer
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19 |
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20 | ////////////// Clockspeed auf 8Mhz
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21 | CSCTL0_H = 0xA5;
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22 | CSCTL1 |= DCOFSEL0 + DCOFSEL1; // Set max. DCO setting
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23 | CSCTL2 = SELA_3 + SELS_3 + SELM_3; // set ACLK = MCLK = DCO
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24 | CSCTL3 = DIVA_0 + DIVS_0 + DIVM_0; // set all dividers
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25 |
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26 | // _delay_cycles(1); = 0.125us
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27 |
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28 | ///////////////// ADC Konfiguration
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29 | // Configure ADC10 - Pulse sample mode; ADC10SC trigger
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30 | ADC10CTL0 = ADC10SHT_2 + ADC10ON; // 16 ADC10CLKs; ADC ON
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31 | ADC10CTL1 = ADC10SHP + ADC10CONSEQ_0; // s/w trig, single ch/conv
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32 | ADC10CTL2 = ADC10RES; // 10-bit conversion results
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33 | ADC10MCTL0 = ADC10SREF_1 + ADC10INCH_11; // AVcc/2
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34 |
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35 | // Configure internal reference
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36 | while(REFCTL0 & REFGENBUSY); // If ref generator busy, WAIT
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37 | REFCTL0 |= REFVSEL_0+REFON; // Select internal ref = 1.5V
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38 | // Internal Reference ON
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39 | //__delay_cycles(400); // Delay for Ref to settle
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40 |
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41 | ////////////// P3DIR |= 0x70; // Pin 4, 5, 6 Als ausgang definieren
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42 | P2DIR |= 0x07; // Pin 2.0, 2.1, 2.2 Als ausgang definieren
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43 | P1DIR |= 0x08; // Pin 3.0 Als ausgang
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44 | P1DIR &= 0x07 + ~BIT1 + ~BIT2 + ~BIT4; // P1.0 1.1 1.2 als eingang def
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45 | P1DIR &= ~BIT4; // P1.0 1.1 1.2 als eingang def
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46 | P4DIR &= ~BIT0; // P4.0 Als Reset eingang
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47 | // P4REN |= BIT0; //Interner Pullup aktivieren
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48 |
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49 | P1DIR |= BIT6;
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50 | P1DIR |= BIT7;
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51 |
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52 | //LED's
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53 | // PJDIR |= 0xff;
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54 | // PJOUT = 0;
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55 |
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56 | // Slaveselect P2.2 auf 1 setzen
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57 | P2OUT |= BIT2;
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58 |
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59 | while(1){
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60 |
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61 |
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62 | P1OUT |= BIT3; // IR Dioden aktivieren
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63 | _delay_cycles(80); //10us wait
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64 | pos = P1IN; //Zustände in pos schreiben
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65 | P1OUT &= ~BIT3; // IR Dioden deaktivieren
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66 |
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67 | //PJOUT = P1IN; // Zur Kontrolle
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68 |
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69 | ADC10CTL0 |= ADC10ENC + ADC10SC; // Sampling and conversion start
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70 | while (ADC10CTL1 & ADC10BUSY); // ADC10BUSY?
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71 |
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72 | if (ADC10MEM0 > 0x2cc){ // is ADC10MEM = A11 > 1.10V? = 2.2V 2CC = 2.1V
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73 | // Auswertung
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74 |
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75 | if(!(pos==pos1) && (!((pos&0x07)==0)))//eine veränderung hat stattgefunden und ein sensor aktiv
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76 | {
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77 | if(pos&BIT0 && pos1&BIT1 && pos2&BIT2)umdrehung++;
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78 |
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79 | if(pos&BIT2 && pos1&BIT1 && pos2&BIT0)umdrehung--;
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80 |
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81 | pos2=pos1;
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82 | pos1=pos;
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83 | }
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84 |
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85 | _delay_cycles(2);
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86 | P1OUT |= BIT7;
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87 | _delay_cycles(5);
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88 | P1OUT &= ~BIT7;
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89 | _delay_cycles(2);
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90 |
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91 | }else{
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92 |
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93 | _delay_cycles(2);
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94 | P1OUT |= BIT6;
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95 | _delay_cycles(5);
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96 | P1OUT &= ~BIT6;
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97 | _delay_cycles(2);
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98 | }
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99 |
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100 | ///////////////////////////////////////////////// Send
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101 | temp = umdrehung;
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102 | P2OUT &= ~BIT2; // Slave Aktivieren
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103 | for(j=4; j>0; j--){
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104 | for(i=8; i>0; i--){
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105 | if(temp&0x80000000) P2OUT |= BIT1;
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106 | else P2OUT &= ~BIT1;
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107 | temp=temp<<1;
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108 | _delay_cycles(5);
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109 | P2OUT |= BIT0; // CLK Setzen
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110 | _delay_cycles(1);
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111 | P2OUT &= ~BIT0; // CLK zurücksetzen
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112 |
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113 | }
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114 | _delay_cycles(50); // Pause zwischen den 8Bit Blöcken
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115 | }
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116 | P2OUT |= BIT2; // Slave deaktivieren
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117 | _delay_cycles(800); // 100us delay
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118 | }
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119 | }
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