1 | #include <stdlib.h>
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2 | #include <avr/io.h>
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3 | #include <avr/interrupt.h>
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4 | #include <avr/pgmspace.h>
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5 | #include <util/crc16.h>
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6 | #include <avr/eeprom.h>
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7 | #include "uart.h"
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8 | #include "lib_crc.h"
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9 | #include <util/delay.h>
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10 |
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11 | /* define CPU frequency in Mhz here if not defined in Makefile */
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12 | #ifndef F_CPU
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13 | #define F_CPU 8000000UL
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14 | #endif
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15 |
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16 | //WR Adresse
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17 | #define WR_ADR 0x01 ;
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18 | /* 9600 baud */
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19 | #define UART_BAUD_RATE 9600
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20 |
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21 | uint8_t count =0;
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22 | uint8_t timerdelay = 10;
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23 | volatile uint8_t t_overflow = 0;
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24 | uint16_t e_p_therme EEMEM ;
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25 | void entprellung( volatile uint8_t *port, uint8_t maske ) {
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26 | uint8_t port_puffer;
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27 | uint8_t entprellungs_puffer;
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28 |
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29 | for( entprellungs_puffer=0 ; entprellungs_puffer!=0xff ; ) {
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30 | entprellungs_puffer<<=1;
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31 | port_puffer = *port;
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32 | _delay_us(150);
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33 | if( (*port & maske) == (port_puffer & maske) )
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34 | entprellungs_puffer |= 0x01;
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35 | }
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36 | }
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37 |
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38 | ISR (TIMER1_OVF_vect)
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39 | { if(count==timerdelay)
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40 | {
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41 | //PORTD ^= (1<<PD3); //Toggeln
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42 | count=0;
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43 | t_overflow = 1;
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44 | TIMSK &= ~(1<<TOIE1);
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45 | }
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46 | count++;
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47 | }
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48 |
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49 | ISR (INT0_vect)
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50 | {
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51 | entprellung( &PIND, (1<<PIND2) ); // ggf. Prellen abwarten
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52 | if( PIND & (1<<PIND2) ) // dann stabilen Wert einlesen
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53 | {
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54 | PORTD ^= (1<<PD3); //Toggeln
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55 |
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56 | //key_pressed =1; // Taste wurde gedrückt
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57 |
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58 | }
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59 | else
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60 | {
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61 |
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62 | // mach was anderes
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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 |
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69 | uint16_t CRC_ausgeben(uint8_t *werte,uint8_t j)
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70 | {
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71 | uint8_t i;
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72 | uint16_t CRC_r = 0x0000;
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73 | unsigned short crc =0xFFFF;
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74 |
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75 | for(i=0;i<j; i++)
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76 | {
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77 | if(i==0)
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78 | CRC_r=update_crc_16(crc,werte[i]);
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79 | else
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80 | CRC_r=update_crc_16(CRC_r,werte[i]);
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81 | }
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82 | return CRC_r;
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83 | }
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84 |
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85 | void USART_Transmit( char data )
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86 | {
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87 | /* Wait for empty transmit buffer */
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88 | while ( !( UCSRA & (1<<UDRE)) )
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89 | ;
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90 | /* Put data into buffer, sends the data */
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91 | UDR = data;
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92 | }
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93 |
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94 | void USART_SendS(uint8_t *werte, uint8_t rep)
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95 | {
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96 | uint8_t i;
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97 | for(i=0;i<rep;i++)
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98 | {
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99 | USART_Transmit(werte[i]);
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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 | uint8_t sendstring[8];
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107 | uint8_t i;
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108 |
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109 | uint16_t CRC_VAL;
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110 | uint16_t std_value = 0xFFFF ;
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111 | uint8_t c;
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112 | uint8_t wr_typ = 0;
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113 | uint16_t p_therme;
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114 | //Initialisierung
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115 | //USART initialisieren
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116 | uart_init( UART_BAUD_SELECT(UART_BAUD_RATE,F_CPU) );
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117 |
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118 | //interrupt an Pin INT0 konfigurieren
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119 | DDRD &= ~(1<< DDD2); //Eingang
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120 | PORTD |= (1<< PD2);
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121 | GICR |= (1<<INT0);
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122 | sei();
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123 |
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124 | //PIN 3 Port D auf Ausgang
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125 | DDRD |= (1<<DDD3);
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126 | PORTD |= (1<<PD3); //Einschalten
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127 |
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128 | // 16-bit Timer aktivieren Überlauf alle 8,388 Sekunden
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129 | TCCR1B |= (1<<CS12)| (1<<CS10);
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130 | TIMSK |= (1<<TOIE1);
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131 | //Programmstart
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132 | timerdelay = 0; // 4 = ca. 30 Sekunden warten bis WR bereit
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133 |
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134 | sendstring[0]=0x02;
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135 | sendstring[1]=0x04;
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136 | sendstring[2]=0x00;
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137 | sendstring[3]=0x00;
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138 | sendstring[4]=0x00;
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139 | sendstring[5]=0x02;
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140 | /*
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141 | * Transmit single character to UART
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142 | */
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143 | USART_Transmit('\r');
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144 |
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145 |
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146 | CRC_VAL = CRC_ausgeben( sendstring,6);
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147 |
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148 | i = CRC_VAL; //Low Byte
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149 | USART_Transmit(i);
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150 | i = CRC_VAL >> 8; //High Byte
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151 | USART_Transmit(i);
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152 |
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153 | USART_Transmit('\r');
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154 |
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155 |
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156 |
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157 |
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158 |
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159 | while(1)
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160 | {
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161 | if((t_overflow ==1) & (wr_typ == 0))
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162 | {
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163 | //Thermenleistung aus EEPROM
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164 | eeprom_busy_wait();
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165 | CRC_VAL = eeprom_read_word(&e_p_therme);
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166 | if(std_value == CRC_VAL)
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167 | {
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168 | eeprom_busy_wait();
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169 | eeprom_write_word(&e_p_therme, 0x4E20);
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170 | }
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171 | eeprom_busy_wait();
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172 | p_therme = eeprom_read_word(&e_p_therme);
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173 | USART_Transmit(p_therme); //Low Byte
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174 | USART_Transmit(p_therme>>8); //High Byte
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175 | //PORTD ^= (1<<PD3); //Toggeln
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176 | //WR-Typ auslesen
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177 | sendstring[0]=WR_ADR;
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178 | sendstring[1]=0x03; //Holding register
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179 | sendstring[2]=0x00;
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180 | sendstring[3]=0x00;
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181 | sendstring[4]=0x00;
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182 | sendstring[5]=0x01;
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183 | CRC_VAL = CRC_ausgeben( sendstring,6);
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184 | sendstring[6]=CRC_VAL;
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185 | sendstring[7]=CRC_VAL>>8;
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186 | USART_SendS(sendstring,8);
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187 | wr_typ = 1;
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188 | }
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189 |
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190 | }
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191 |
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192 |
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193 | }
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