1 | #include <avr/io.h>
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2 | #include "avr/interrupt.h"
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3 | #include <stdint.h>
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4 | #include <util/delay.h>
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5 | #include "avr_compiler.h"
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6 | #include "function.h"
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7 | #include "UartHandler.h"
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8 | #include "usart_driver.h"
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9 |
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10 |
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11 | /***********************************/
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12 |
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13 | void funct_port_init (void)
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14 | {
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15 |
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16 | /* Port C - digital I/O */
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17 | DIGI_PORT.DIRSET = DIGI_PIN1; // Port C Pin 1 digital I/O 1 as output PIN7
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18 | DIGI_PORT.DIRCLR = DIGI_PIN2; // Port C Pin 3 digital I/O 2 as input PIN9
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19 | DIGI_PORT.DIRSET = OPTO_PIN; // Port C Pin 0 opto-coupler as digital output
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20 |
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21 | PORTC.PIN0CTRL= PORT_OPC_WIREDANDPULL_gc;
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22 | PORTC.INTCTRL = PORT_INT0LVL_LO_gc | PORT_INT0LVL_MED_gc | PORT_INT0LVL_HI_gc;
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23 | PORTC.PIN3CTRL = PORT_OPC_PULLUP_gc | PORT_ISC_FALLING_gc;
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24 | PORTC.INT0MASK = 0x03;
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25 |
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26 | }
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27 |
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28 |
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29 | /**********************************/
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30 |
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31 |
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32 | void funct_inter_init(void)
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33 | {
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34 | PMIC.CTRL = PMIC_MEDLVLEN_bm | PMIC_LOLVLEN_bm | PMIC_HILVLEN_bm;
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35 | }
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36 |
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37 | /***********************************/
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38 |
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39 | void funct_timer2_init(void)
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40 | {
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41 | TCD1.CTRLA = TC_CLKSEL_DIV1_gc;
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42 | TCD1.CTRLB = TC_WGMODE_NORMAL_gc;
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43 | TCD1.INTCTRLA = TC_OVFINTLVL_HI_gc;
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44 | TCD1.PER= 0xFFF;
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45 | }
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46 |
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47 |
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48 | /***********************************/
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49 |
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50 |
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51 | float zaehler_auswerten(void)
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52 | {
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53 | float perioden_dauer = 0;
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54 | if (PORTC_PIN3CTRL==0) // hier soll der Counter anfangen zu zählen bei fallender Flanke
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55 |
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56 | {
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57 |
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58 | perioden_dauer = TCD1.CNT*zeit_in_us;
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59 | TCD1.CNT= 0;
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60 | zaehler=true;
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61 | }
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62 | return perioden_dauer;
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63 | }
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64 |
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65 | /***********************************/
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66 |
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67 |
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68 | ISR(PORTC_INT0_vect) // interrupt für I/O Port
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69 | {
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70 | uart_send_string("\ninterrupt ausgeloest\n"); // Diese serielle Ausgabe wird nicht an Termite angezeigt
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71 |
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72 | perioden_dauer = zaehler_auswerten();
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73 | interrupt=true;
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74 |
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75 |
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76 | if (perioden_dauer >= sync_min_1) // synchronization and Communication
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77 | {
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78 | synchronisiert_b = true;
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79 | clock_tick = perioden_dauer*ticks;
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80 |
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81 | n_nibble = 0;
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82 | }
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83 |
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84 |
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85 | }
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86 |
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87 | /***********************************/
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88 |
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89 | ISR(TCD1_OVF_vect) // Counter Interrupt
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90 | {
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91 | uart_send_string("\ninterrupt timer ausgeloest\n");
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92 |
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93 | if (interrupt)
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94 | {
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95 | TCD1.CNT=0 ;
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96 | }
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97 |
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98 |
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99 | }
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100 |
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101 | /***********************************/
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102 |
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103 | int main (void)
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104 | {
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105 |
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106 | sei();
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107 | funct_clock_init_PLL_60M(); // clock initialization 60 MHz
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108 |
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109 |
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110 |
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111 | funct_DACB_single0_enable(DAC_REFSEL_AVCC_gc); // initialize DAC with internal Vcc
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112 |
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113 | uart_InitUsartDriver(); // initialize RS232 communication
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114 |
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115 |
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116 | DIGI_PORT.OUTCLR =DIGI_PIN1; //digital output port pin 1 LOW
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117 | DIGI_PORT.OUTCLR = OPTO_PIN; // opto-coupler pin LOW
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118 |
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119 | IdleValue=DEFAULT_IDLE_VAL; // analog output -> 5 V (max.: 0x0FFF, 12 bit)
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120 | Port=SER_PORT_AO0; // set analog output as idle port
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121 | errorOut=true; // turn on error messages by default
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122 | debugOut=true; // turn on debug messages by default
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123 |
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124 |
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125 |
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126 | if (debugOut)
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127 | {
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128 | uart_send_string(version);
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129 | // send version number via RS232
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130 | uart_send_string("\nSignalgenerator laeuft\n");
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131 | }
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132 |
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133 |
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134 | funct_timer2_init();
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135 | uart_send_string("\ntimer2 initialisiert\n");
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136 | funct_port_init();
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137 | funct_inter_init();
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138 |
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139 | uart_send_string("\nSignalgenerator wurde initialisiert\n");
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140 |
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141 |
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142 | uart_send_string("\nENDE INITIALISIERUNGEN\n");
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143 |
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144 | /* main loop */
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145 | while(1)
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146 | {
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147 | }
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148 | }
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