DS2438_ADC/DS2438_ADC.c

   1 // Copyright (c) 2017, Tobias Mueller tm(at)tm3d.de\r
   2 // All rights reserved.\r
   3 //\r
   4 // Redistribution and use in source and binary forms, with or without\r
   5 // modification, are permitted provided that the following conditions are\r
   6 // met:\r
   7 //\r
   8 //  * Redistributions of source code must retain the above copyright\r
   9 //    notice, this list of conditions and the following disclaimer.\r
  10 //  * Redistributions in binary form must reproduce the above copyright\r
  11 //    notice, this list of conditions and the following disclaimer in the\r
  12 //    documentation and/or other materials provided with the\r
  13 //    distribution.\r
  14 //  * All advertising materials mentioning features or use of this\r
  15 //    software must display the following acknowledgement: This product\r
  16 //    includes software developed by tm3d.de and its contributors.\r
  17 //  * Neither the name of tm3d.de nor the names of its contributors may\r
  18 //    be used to endorse or promote products derived from this software\r
  19 //    without specific prior written permission.\r
  20 //\r
  21 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\r
  22 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\r
  23 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\r
  24 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT\r
  25 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\r
  26 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT\r
  27 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\r
  28 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\r
  29 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\r
  30 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE\r
  31 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\r
  32 \r
  33 \r
  34 #define F_CPU 8000000UL\r
  35 #include <avr/io.h>\r
  36 #include <avr/interrupt.h>\r
  37 #include <util/delay.h>\r
  38 #include <avr/wdt.h>\r
  39 #include <avr/sleep.h>\r
  40 #include <avr/pgmspace.h>\r
  41 \r
  42 \r
  43 extern void OWINIT();\r
  44 extern void EXTERN_SLEEP();\r
  45 \r
  46 uint8_t owid[8]={0x26, 0xA3, 0xD9, 0x84, 0xDD, 0xDD, 0x05, 0xF9};/**/\r
  47 uint8_t config_info[26]={0x01,0x06, 0x05,0x08, 0x06,0x08, 0x00,0x00, 0x02,0x09,0x00,0x09,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};\r
  48 \r
  49 \r
  50 \r
  51 extern uint8_t mode;\r
  52 extern uint8_t gcontrol;\r
  53 extern uint8_t reset_indicator;\r
  54 extern uint8_t alarmflag;\r
  55 \r
  56 volatile uint8_t wdcounter;\r
  57 \r
  58 \r
  59 typedef union {\r
  60 \r
  61         volatile uint8_t bytes[64];\r
  62         struct {\r
  63                 uint8_t status;  //1\r
  64                 int16_t temp;  //2\r
  65                 uint16_t voltage;  //4\r
  66                 uint16_t current;  //6\r
  67                 uint8_t threshold; //8\r
  68                 \r
  69                 uint8_t page1[8]; //9\r
  70                 uint8_t page2[8]; //17\r
  71                 uint8_t page3[8]; //25\r
  72                 uint8_t page4[8];  //33\r
  73                 uint8_t page5[8];  //41\r
  74                 uint8_t page6[8];  //49\r
  75                 uint8_t page7[8];  //57\r
  76                 //uint8_t crc;  //65\r
  77         };\r
  78 } pack_t;\r
  79 volatile pack_t pack;\r
  80 \r
  81 \r
  82 volatile int16_t am2302_temp;\r
  83 volatile uint16_t am2302_hum;\r
  84 \r
  85 \r
  86 \r
  87 volatile uint8_t am2302_mode=0;\r
  88 volatile uint8_t timeout=0;\r
  89 \r
  90 \r
  91 \r
  92 \r
  93 \r
  94 \r
  95 uint8_t userRegister[1];\r
  96 int16_t sRH,sT;\r
  97 volatile double temperatureC,humidityRH;\r
  98 volatile double l;\r
  99 \r
 100 #if  defined(__AVR_ATtiny24__)||defined(__AVR_ATtiny44__)  || defined(__AVR_ATtiny84__) || defined(__AVR_ATtiny24A__)||defined(__AVR_ATtiny44A__)  || defined(__AVR_ATtiny84A__)\r
 101 ISR(WATCHDOG_vect) {\r
 102         #else\r
 103 ISR(WDT_vect) {\r
 104         #endif\r
 105         wdcounter++;\r
 106         if (reset_indicator==1) reset_indicator++;\r
 107         else if (reset_indicator==2) mode=0;\r
 108 }\r
 109         \r
 110 int testSW(void) {\r
 111         uint8_t r;\r
 112         DDRB&=~(1<<PORTB0);  //Eingang\r
 113         __asm__ __volatile__ ("nop");\r
 114         PORTB|=(1<<PORTB0); //Pullup\r
 115         __asm__ __volatile__ ("nop");\r
 116         __asm__ __volatile__ ("nop");\r
 117         __asm__ __volatile__ ("nop");\r
 118         __asm__ __volatile__ ("nop");\r
 119         __asm__ __volatile__ ("nop");\r
 120         r=PINB&(1<<PORTB0);\r
 121         __asm__ __volatile__ ("nop");\r
 122         PORTB&=~(1<<PORTB0);\r
 123         __asm__ __volatile__ ("nop");\r
 124         DDRB|=(1<<PORTB0);  //Eingang\r
 125         return (r==0);\r
 126 }\r
 127 \r
 128 \r
 129 \r
 130 \r
 131 \r
 132 \r
 133 \r
 134 \r
 135         int main(void){\r
 136                 PRR|=(1<<PRUSI);   //  usi for save Power\r
 137                 PORTA=0xFF-(1<<PORTA5);  \r
 138                 PORTB=0xFF-(1<<PORTB0); //Schalter kann gegen Masse sein und zieht dann immer Strom\r
 139                 DDRB|=(1<<PORTB0); //Als Ausgang und 0\r
 140                 \r
 141                 \r
 142                 OWINIT();\r
 143 \r
 144                 ACSR|=(1<<ACD);  //Disable Comparator\r
 145                 //ADCSRB|=(1<<ACME); //Disable Analog multiplexer\r
 146                 MCUCR &=~(1<<PUD); //All Pins Pullup...\r
 147                 MCUCR |=(1<<BODS);\r
 148                 ADCSRA=(1<<ADEN)|(1<ADPS0)|(1<<ADPS2);\r
 149                 DIDR0|=(1<<ADC5D);\r
 150                 ADMUX=5; //VCC as ref\r
 151                 PORTA&=~(1<<PORTA5);  \r
 152                 // Set up Watch Dog Timer for Inactivity\r
 153                 WDTCSR |= (1<<WDCE) ;   // Enable the WD Change Bit\r
 154                 WDTCSR =   (1<<WDIE) |              // Enable WDT Interrupt\r
 155                         (1<<WDP2) | (1<<WDP1);   // Set Timeout to ~2 seconds           \r
 156                 \r
 157                 \r
 158                 sei();\r
 159                 \r
 160                 while(1)   {\r
 161                         if (gcontrol) {\r
 162                                 wdcounter=16;\r
 163                                 gcontrol=0;\r
 164                         }\r
 165                         if (wdcounter>=16) {\r
 166                                 uint16_t sum=0;\r
 167                                 for(uint8_t i=0;i<16;i++) {\r
 168                                         ADCSRA|=(1<<ADSC);\r
 169                                         while ((ADCSRA&(1<<ADSC)));\r
 170                                         sum=sum+ADC;\r
 171                                 }\r
 172                                 //5V=0x03FF0 (16 x 0x3FF)  5V=50C 50C = 50*256\r
 173                                 am2302_temp=sum*0.782;\r
 174                                 am2302_hum=sum/32.736;\r
 175                                 wdcounter=0;\r
 176                         }\r
 177                         \r
 178                         \r
 179 \r
 180                         if (((TIMSK0 & (1<<TOIE0))==0)&& (mode==0))       {\r
 181                                 MCUCR|=(1<<SE)|(1<<SM1);\r
 182                                 MCUCR&=~(1<<ISC01);\r
 183                                 } else {\r
 184                                 MCUCR|=(1<<SE);\r
 185                                 MCUCR&=~(1<<SM1);\r
 186                         }\r
 187                         asm("SLEEP");\r
 188                 }\r
 189 \r
 190 \r
 191         }