1 | // Display an PORTC
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2 | // MAX6675 an PORTB
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3 | // Taster an PORTD
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4 | // Output Relais an PORTD
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5 |
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6 |
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7 | #include <stdint.h>
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8 | #include <stdlib.h>
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9 | #include <string.h>
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10 | #include <avr/io.h>
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11 | #include <util/delay.h>
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12 | #include "lcd-routines.h"
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13 |
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14 | extern void lcd_init(void);
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15 | extern void lcd_clear(void);
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16 | extern void set_cursor(uint8_t x, uint8_t y);
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17 | extern void lcd_string(char *data);
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18 |
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19 | /* Defines MAX !!*/
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20 |
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21 | #define MAX_DDR DDRB
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22 | #define MAX_PORT PORTB
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23 | #define MAX_PIN PINB
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24 |
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25 | #define CS PB0
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26 | #define SCK PB1
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27 | #define SO PB2
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28 | // ------------------------- //
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29 | /* Defines Menütasten */
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30 |
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31 | #define MENU_DDR DDRD
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32 | #define MENU_PIN PIND
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33 | #define MENU_PORT PORTD
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34 |
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35 | #define MENU_SET PD2
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36 | #define MENU_UP PD0
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37 | #define MENU_DOWN PD1
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38 | // ------------------------- //
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39 | /* Defines Relais */
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40 | #define REL_OUT_DDR DDRD
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41 | #define REL_OUT_PORT PORTD
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42 | #define REL_OUT PD7
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43 | // ------------------------- //
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44 |
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45 | // ---------- Temp. holen -----------
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46 | uint16_t gettemp(void){
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47 | uint8_t bit = 0, bitnr = 12;
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48 | uint8_t foo1 = 0;
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49 | uint16_t Rohdata = 0;
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50 |
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51 |
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52 | MAX_PORT &= ~(1 << CS);
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53 |
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54 | for(foo1 = 0 ; foo1 < 16 ; foo1++){
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55 |
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56 | bit = 15 - foo1;
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57 |
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58 |
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59 | MAX_PORT |= (1 << SCK);
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60 |
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61 |
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62 | if((bit <= 14) && (bit >= 3)){
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63 |
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64 | if((MAX_PIN & (1 << SO))){
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65 | bitnr--;
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66 | Rohdata |= (1 << bitnr);
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67 | }else{
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68 | bitnr--;
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69 | Rohdata &= ~(1 << bitnr);
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70 | }
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71 |
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72 | }else{
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73 | bitnr = 12;
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74 | }
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75 |
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76 | MAX_PORT &= ~(1 << SCK);
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77 |
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78 | }
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79 |
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80 |
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81 | MAX_PORT |= (1 << CS);
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82 |
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83 |
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84 | return Rohdata; //gibt die 12 relevanten Bits zurück
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85 | }
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86 |
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87 | // ----------- Long Delay -------------------
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88 | void long_delay(uint16_t ms) {
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89 | for(; ms>0; ms--) _delay_ms(1);
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90 | //while(ms--) _delay_ms(1);
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91 | }
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92 | // ------------------------------------------
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93 |
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94 | //------------ Taster entprellen ------------
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95 |
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96 | inline uint8_t debounce(volatile uint8_t *port, uint8_t pin)
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97 | {
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98 | if ( ! (*port & (1 << pin)) )
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99 | {
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100 | /* Pin wurde auf Masse gezogen, 100ms warten */
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101 | long_delay(110); // max. 262.1 ms / F_CPU in MHz
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102 | if ( *port & (1 << pin) )
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103 | {
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104 | /* Anwender Zeit zum Loslassen des Tasters geben */
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105 | long_delay(50);
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106 | return 1;
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107 | }
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108 | }
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109 | return 0;
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110 | }
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111 | //-------------------------------------------
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112 |
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113 |
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114 | void initavr(void){ //AVR initialisieren
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115 |
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116 | MAX_DDR &= ~(1 << SO);
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117 | MAX_DDR |= ((1 << CS) | (1 << SCK));
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118 |
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119 | MAX_PORT |= (1 << CS);
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120 | MAX_PORT &= ~(1 << SCK);
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121 |
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122 | }
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123 |
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124 |
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125 | int main(void)
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126 | {
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127 | char MenuVal;
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128 | char intMaxTemp;
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129 | int intMaxTempCompare;
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130 | char strMaxTemp[3];
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131 |
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132 | char intOffset;
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133 | char intOffsetCompare;
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134 | char strOffset[3];
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135 |
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136 | initavr();
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137 | lcd_init();
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138 | MENU_DDR &=~ (1<<MENU_SET) | (1<<MENU_UP) | (1<<MENU_DOWN);
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139 | MENU_PORT |= (1<<MENU_SET) | (1<<MENU_UP) | (1<<MENU_DOWN);
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140 |
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141 | REL_OUT_DDR |= (1<<REL_OUT); // Ausgang für Relais
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142 | REL_OUT_PORT |= (1<<REL_OUT);
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143 |
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144 | MenuVal = 0;
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145 | intMaxTemp = 187;
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146 | intOffset = 0;
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147 |
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148 | while(1){
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149 | char temp[7];
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150 | double temperature;
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151 |
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152 |
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153 | if (debounce(&MENU_PIN, MENU_SET)==1)
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154 | {
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155 | MenuVal++;
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156 | }
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157 |
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158 | if (MenuVal == 3) // beim letzten Menü auf Temp.Anzeige wechseln
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159 | {
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160 | MenuVal=0;
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161 | }
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162 |
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163 |
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164 | switch (MenuVal){
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165 | case 0:
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166 | temperature = gettemp();
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167 |
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168 | intMaxTempCompare = intMaxTemp * 4;
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169 | intOffsetCompare = intOffset * 4;
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170 | temperature = temperature + intOffsetCompare;
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171 |
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172 | if (temperature < intMaxTempCompare)
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173 | {
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174 | temperature = (temperature / 4);
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175 | dtostrf(temperature, 2, 2, temp);
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176 | long_delay(200);
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177 | lcd_clear();
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178 | lcd_string(temp);
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179 | set_cursor(0,2);
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180 | lcd_string("Heizung an!");
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181 | REL_OUT_PORT &=~ (1<<REL_OUT);
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182 | }
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183 |
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184 | if (temperature >= intMaxTempCompare)
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185 | {
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186 | temperature = (temperature / 4);
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187 | dtostrf(temperature, 2, 2, temp);
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188 | long_delay(200);
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189 | lcd_clear();
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190 | lcd_string(temp);
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191 | set_cursor(0,2);
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192 | lcd_string("Heizung aus!");
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193 | REL_OUT_PORT |= (1<<REL_OUT);
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194 | }break;
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195 |
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196 | case 1:
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197 | lcd_clear();
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198 | set_cursor(0,1);
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199 | lcd_string("Set max. Temp.");
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200 | set_cursor(0,2);
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201 | if (debounce (&MENU_PIN, MENU_UP)==1)
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202 | {
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203 | intMaxTemp++;
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204 | }
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205 |
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206 | if (debounce(&MENU_PIN, MENU_DOWN)==1)
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207 | {
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208 | intMaxTemp--;
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209 | }
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210 | itoa(intMaxTemp, strMaxTemp, 10);
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211 |
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212 | lcd_string(strMaxTemp);
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213 | long_delay(23);
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214 | break;
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215 |
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216 | case 2:
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217 | lcd_clear();
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218 | set_cursor(0,1);
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219 | lcd_string("Set Offset Temp.");
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220 | set_cursor(0,2);
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221 | if (debounce(&MENU_PIN, MENU_UP)==1)
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222 | {
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223 | intOffset++;
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224 | }
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225 |
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226 | if (debounce(&MENU_PIN, MENU_DOWN)==1)
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227 | {
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228 | intOffset--;
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229 | }
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230 | itoa(intOffset, strOffset, 10);
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231 | lcd_string(strOffset);
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232 | long_delay(23);
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233 | break;}
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234 |
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235 |
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236 | }
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237 | }
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