1 | //LED Treiber mit Attiny13; PWM Ausgang für LED Steuerung PB1; Akkuüberwachung über ADC PB2; Taster auf PB3
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2 |
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3 | //########################################################################################### MODE/PWM SETUP
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4 |
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5 | #define outpin 1 // PWM Ausgang PB1
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6 | #define PWM OCR0B //PWM-value
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7 |
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8 | #define adcpin 2 //ADC PIN ! PB2
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9 | #define adcchn 1 //ADC Kanal ! ADC1
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10 |
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11 | #define tasterpin 3 //PCINT3
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12 |
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13 | #define portinit() do{ DDRB=(1<<outpin); PORTB=0xff-(1<<outpin)-(1<<adcpin)-(1<<tasterpin); }while(0)//Port deklarieren
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14 |
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15 |
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16 | #define F_CPU 4800000 //CPU: 4.8MHz PWM: 9.4kHz ####### use low fuse: 0x75 #######
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17 | //#define BATTMON 125//enable battery monitoring with this threshold
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18 |
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19 |
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20 | //###########################################################################################
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21 |
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22 | #include <avr/io.h>
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23 | #include <util/delay.h>
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24 | #include <avr/interrupt.h>
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25 | #include <avr/sleep.h>
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26 | #include <avr/eeprom.h>
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27 | #include <avr/pgmspace.h>
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28 | #include <avr/wdt.h>
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29 |
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30 | #define byte uint8_t
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31 | #define word uint16_t
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32 |
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33 | #define WDTIME 0b01000011 //125ms
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34 |
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35 | #define sleepinit() do{ WDTCR=WDTIME; sei(); MCUCR=(MCUCR &~0b00111000)|0b00110000; }while(0) //WDT-int and Power Down-Sleep
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36 |
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37 | #define SLEEP asm volatile ("SLEEP")
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38 |
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39 | #define pwminit() do{ TCCR0A=0b00100001; TCCR0B=0b00000001; }while(0) //chan A, phasePWM, clk/1 ->2.35kHz@1.2MHz
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40 |
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41 | #define adcinit() do{ ADMUX =0b01100000|adcchn; ADCSRA=0b11000100; }while(0) //ref1.1V, left-adjust, ADC1/PB2; enable, start, clk/16
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42 | #define adcread() do{ ADCSRA|=64; while (ADCSRA&64); }while(0)
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43 | #define adcresult ADCH
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44 |
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45 |
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46 | #define ADCoff ADCSRA&=~(1<<7) //ADC off (enable=0);
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47 | #define ADCon ADCSRA|=(1<<7) //ADC on
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48 | #define ACoff ACSR|=(1<<7) //AC off (disable=1)
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49 | #define ACon ACSR&=~(1<<7) //AC on (disable=0)
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50 |
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51 |
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52 | //______________________Taster entprellen_______________________________________________________________________________________________
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53 | /************************************************************************/
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54 | /* */
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55 | /* Not so powerful Debouncing Example */
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56 | /* No Interrupt needed */
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57 | /* */
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58 | /* Author: Peter Dannegger */
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59 | /* */
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60 | /************************************************************************/
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61 | // Target: ATtiny13
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62 | //http://www.mikrocontroller.net/attachment/highlight/67964
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63 |
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64 | #define debounce( port, pin ) \
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65 | ({ \
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66 | static uint8_t flag = 0; /* new variable on every macro usage */ \
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67 | uint8_t i = 0; \
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68 | \
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69 | if( flag ){ /* check for key release: */ \
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70 | for(;;){ /* loop ... */ \
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71 | if( !(port & 1<<pin) ){ /* ... until key pressed or ... */ \
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72 | i = 0; /* 0 = bounce */ \
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73 | break; \
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74 | } \
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75 | _delay_us( 98 ); /* * 256 = 25ms */ \
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76 | if( --i == 0 ){ /* ... until key >25ms released */ \
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77 | flag = 0; /* clear press flag */ \
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78 | i = 0; /* 0 = key release debounced */ \
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79 | break; \
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80 | } \
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81 | } \
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82 | }else{ /* else check for key press: */ \
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83 | for(;;){ /* loop ... */ \
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84 | if( (port & 1<<pin) ){ /* ... until key released or ... */ \
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85 | i = 0; /* 0 = bounce */ \
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86 | break; \
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87 | } \
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88 | _delay_us( 98 ); /* * 256 = 25ms */ \
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89 | if( --i == 0 ){ /* ... until key >25ms pressed */ \
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90 | flag = 1; /* set press flag */ \
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91 | i = 1; /* 1 = key press debounced */ \
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92 | break; \
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93 | } \
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94 | } \
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95 | } \
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96 | i; /* return value of Macro */ \
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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 | byte mypwm=0;
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103 | byte pmode=1; //Start Mode
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104 | byte interrupt_flag=1;
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105 |
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106 | #ifdef BATTMON
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107 | byte lowbattcounter=0;
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108 | #endif
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109 |
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110 |
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111 |
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112 | ISR(WDT_vect) { //WatchDogTimer interrupt / Akkuüberwachung
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113 |
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114 | #ifdef BATTMON //code to check voltage and ramp down
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115 | adcread();
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116 | if (adcresult<BATTMON) { if (++lowbattcounter>8) {mypwm=(mypwm>>1)+3;lowbattcounter=0;} } //Halbiert PWM
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117 | else lowbattcounter=0;
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118 | #endif
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119 | }
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120 |
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121 |
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122 |
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123 | ISR(PCINT0_vect) { //pin change interrupt
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124 | //PWM=30; //test
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125 |
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126 | if( debounce( PINB, tasterpin )){ //Taster entprellt
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127 | interrupt_flag=0; //aktuellen Modus verlassen
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128 | pmode++; //nächster Modus
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129 | }}
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130 |
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131 | int main(void) {
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132 |
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133 | portinit(); //Ports
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134 | sleepinit(); //Sleep
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135 | ACoff;
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136 | #ifdef BATTMON
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137 | adcinit();
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138 | #else
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139 | ADCoff;
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140 | #endif
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141 | pwminit(); //PWM
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142 |
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143 | PCMSK = (1 << tasterpin); // Externer Reset auf tasterpin definieren
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144 | GIMSK = (1 << PCIE); // Pin Change Interrupt freigeben
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145 |
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146 |
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147 | while(1){
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148 | interrupt_flag=1; //Dauerschleife aktivieren
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149 |
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150 | switch(pmode){
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151 |
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152 | case 1: mypwm=255; while(interrupt_flag){PWM=mypwm;} break; //100%
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153 |
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154 | case 2: mypwm=120; while(interrupt_flag){PWM=mypwm;} break; //50%
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155 |
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156 |
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157 | case 3: mypwm=0; //Ausgang auf 0%
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158 | sleep_cpu(); //power down
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159 |
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160 |
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161 | //--nach power down--
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162 |
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163 | pmode=1; //mit 1 Mode starten
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164 | break;
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165 |
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166 |
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167 |
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168 | default: mypwm=5; while(interrupt_flag){PWM=mypwm;} pmode=1; break; //all other
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169 |
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170 | }//switch
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171 |
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172 | }
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173 |
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174 |
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175 |
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176 |
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177 | return 0;
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178 | }//main
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