DS2438_SHT2X/DS2438_SHT2X.c

   1 // Copyright (c) 2015, Tobias Mueller tm(at)tm3d.de
   2 // All rights reserved.
   3 //
   4 // Redistribution and use in source and binary forms, with or without
   5 // modification, are permitted provided that the following conditions are
   6 // met:
   7 //
   8 //  * Redistributions of source code must retain the above copyright
   9 //    notice, this list of conditions and the following disclaimer.
  10 //  * Redistributions in binary form must reproduce the above copyright
  11 //    notice, this list of conditions and the following disclaimer in the
  12 //    documentation and/or other materials provided with the
  13 //    distribution.
  14 //  * All advertising materials mentioning features or use of this
  15 //    software must display the following acknowledgement: This product
  16 //    includes software developed by tm3d.de and its contributors.
  17 //  * Neither the name of tm3d.de nor the names of its contributors may
  18 //    be used to endorse or promote products derived from this software
  19 //    without specific prior written permission.
  20 //
  21 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32
  33
  34 #define F_CPU 8000000UL
  35 #include <avr/io.h>
  36 #include <avr/interrupt.h>
  37 #include <util/delay.h>
  38 #include <avr/wdt.h>
  39 #include <avr/sleep.h>
  40 #include <avr/pgmspace.h>
  41 #include "../common/I2C/USI_TWI_Master.h"
  42 #include "../common/I2C/MAX44009.h"
  43 #include "../common/I2C/SHT2x.h"
  44
  45 extern void OWINIT();
  46 extern void EXTERN_SLEEP();
  47
  48 uint8_t owid[8]={0x26, 0xA2, 0xD9, 0x84, 0x00, 0x00, 0x05, 0x16};/**/
  49 uint8_t config_info[16]={0x01,0x06, 0x05,0x08, 0x04,0x07, 0x00,0x00, 0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
  50 //uint8_t config_info[16]={0x01,0x06, 0x05,0x08, 0x04,0x08, 0x00,0x00, 0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
  51
  52
  53 extern uint8_t mode;
  54 extern uint8_t gcontrol;
  55 extern uint8_t reset_indicator;
  56 extern uint8_t alarmflag;
  57
  58 volatile uint8_t wdcounter;
  59
  60
  61 typedef union {
  62
  63         volatile uint8_t bytes[64];
  64         struct {
  65                 uint8_t status;  //1
  66                 int16_t temp;  //2
  67                 uint16_t voltage;  //4
  68                 uint16_t current;  //6
  69                 uint8_t threshold; //8
  70
  71                 uint8_t page1[8]; //9
  72                 uint8_t page2[8]; //17
  73                 uint8_t page3[8]; //25
  74                 uint8_t page4[8];  //33
  75                 uint8_t page5[8];  //41
  76                 uint8_t page6[8];  //49
  77                 uint8_t page7[8];  //57
  78                 //uint8_t crc;  //65
  79         };
  80 } pack_t;
  81 volatile pack_t pack;
  82
  83
  84
  85 volatile int16_t am2302_temp;
  86 volatile uint16_t am2302_hum;
  87
  88 uint8_t userRegister[1];
  89 int16_t sRH,sT;
  90 volatile double temperatureC,humidityRH;
  91 volatile double l;
  92
  93 #if  defined(__AVR_ATtiny24__)||defined(__AVR_ATtiny44__)  || defined(__AVR_ATtiny84__) || defined(__AVR_ATtiny24A__)||defined(__AVR_ATtiny44A__)  || defined(__AVR_ATtiny84A__)
  94 ISR(WATCHDOG_vect) {
  95 #else
  96 ISR(WDT_vect) {
  97 #endif
  98         wdcounter++;
  99         if (reset_indicator==1) reset_indicator++;
 100         else if (reset_indicator==2) mode=0;
 101
 102
 103 }
 104
 105 int testSW(void) {
 106         uint8_t r;
 107         DDRB&=~(1<<PORTB0);  //Eingang
 108          __asm__ __volatile__ ("nop");
 109          PORTB|=(1<<PORTB0); //Pullup
 110          __asm__ __volatile__ ("nop");
 111          __asm__ __volatile__ ("nop");
 112          __asm__ __volatile__ ("nop");
 113          __asm__ __volatile__ ("nop");
 114          __asm__ __volatile__ ("nop");
 115          r=PINB&(1<<PORTB0);
 116          __asm__ __volatile__ ("nop");
 117          PORTB&=~(1<<PORTB0);
 118          __asm__ __volatile__ ("nop");
 119         DDRB|=(1<<PORTB0);  //Eingang
 120         return (r==0);
 121
 122
 123 }
 124
 125 int main(void){
 126      PRR|=(1<<PRADC);  // adc for save Power
 127         PORTA=0xFF;
 128         PORTB=0xFF-(1<<PORTB0); //Schalter kann gegen Masse sein und zieht dann immer Strom
 129         DDRB|=(1<<PORTB0); //Als Ausgang und 0
 130
 131
 132         OWINIT();
 133
 134         ACSR|=(1<<ACD);  //Disable Comparator
 135         ADCSRB|=(1<<ACME); //Disable Analog multiplexer
 136         MCUCR &=~(1<<PUD); //All Pins Pullup...
 137         MCUCR |=(1<<BODS);
 138
 139
 140         WDTCSR |= ((1<<WDCE) );   // Enable the WD Change Bit//| (1<<WDE)
 141         WDTCSR |=   (1<<WDIE) |              // Enable WDT Interrupt
 142         (1<<WDP3) | (1<<WDP0);   // Set Timeout to ~8 seconds
 143          if (testSW()) {
 144                 config_info[5]=8;
 145         }else{
 146                 config_info[5]=7;
 147          }
 148
 149     uint8_t i;
 150     for(i=0;i<64;i++) pack.bytes[i]=0;
 151         MCUSR=0;
 152         USI_TWI_Master_Initialise();
 153         SHT2x_SoftReset();
 154         SHT2x_ReadUserRegister(userRegister);
 155         //(userRegister & ~SHT2x_RES_MASK) | SHT2x_RES_10_13BIT;
 156         SHT2x_WriteUserRegister(userRegister); //write changed user reg
 157         // --- measure humidity with "Hold Master Mode (HM)" ---
 158         SHT2x_MeasurePoll(HUMIDITY, &sRH);
 159         // --- measure temperature with "Polling Mode" (no hold master) ---
 160         SHT2x_MeasurePoll(TEMP, &sT);
 161         //-- calculate humidity and temperature --
 162         temperatureC = SHT2x_CalcTemperatureC(sT);
 163         humidityRH = SHT2x_CalcRH(sRH);
 164
 165         sei();
 166
 167          while(1)   {
 168                  if (gcontrol) {
 169                          wdcounter=3;
 170                          gcontrol=0;
 171                  }
 172                  if (wdcounter>2) {
 173                          //PORTB|=(1<<PINB1); //Dauer 440ms
 174                          SHT2x_MeasurePoll(HUMIDITY, &sRH);
 175                          // --- measure temperature with "Polling Mode" (no hold master) ---
 176                          SHT2x_MeasurePoll(TEMP, &sT);
 177                          //-- calculate humidity and temperature --
 178                          temperatureC = SHT2x_CalcTemperatureC(sT)*10.0;
 179                          humidityRH = SHT2x_CalcRH(sRH)*10.0;
 180                          if (testSW()) {
 181                                  am2302_hum= humidityRH*10.0;
 182                                  am2302_temp=temperatureC*25.6;
 183                                  am2302_temp=am2302_temp-45;
 184                                  config_info[5]=8;
 185
 186                          }else{
 187
 188                                 double hhum=(1.0546-0.000216*temperatureC)*(humidityRH);
 189                                 //am2302_hum=0.318*hhum +76.0;
 190                                 am2302_hum=0.31*hhum +80;
 191                                 am2302_temp=temperatureC*25.6;
 192                                 am2302_temp=am2302_temp-45;
 193                                 config_info[5]=7;
 194                          }
 195                          //PORTB&=~(1<<PINB1);
 196                          wdcounter=0;
 197                  }
 198
 199                 if (((TIMSK0 & (1<<TOIE0))==0)&& (mode==0))       {
 200                         MCUCR|=(1<<SE)|(1<<SM1);
 201                         MCUCR&=~(1<<ISC01);
 202                 } else {
 203                         MCUCR|=(1<<SE);
 204                         MCUCR&=~(1<<SM1);
 205                 }
 206                 asm("SLEEP");
 207         }
 208
 209
 210 }