DS18B20_Thermocouble/DS18B20_TC.c

   1 \r
   2 // Copyright (c) 2015, Tobias Mueller tm(at)tm3d.de\r
   3 // All rights reserved.\r
   4 //\r
   5 // Redistribution and use in source and binary forms, with or without\r
   6 // modification, are permitted provided that the following conditions are\r
   7 // met:\r
   8 //\r
   9 //  * Redistributions of source code must retain the above copyright\r
  10 //    notice, this list of conditions and the following disclaimer.\r
  11 //  * Redistributions in binary form must reproduce the above copyright\r
  12 //    notice, this list of conditions and the following disclaimer in the\r
  13 //    documentation and/or other materials provided with the\r
  14 //    distribution.\r
  15 //  * All advertising materials mentioning features or use of this\r
  16 //    software must display the following acknowledgement: This product\r
  17 //    includes software developed by tm3d.de and its contributors.\r
  18 //  * Neither the name of tm3d.de nor the names of its contributors may\r
  19 //    be used to endorse or promote products derived from this software\r
  20 //    without specific prior written permission.\r
  21 //\r
  22 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\r
  23 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\r
  24 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\r
  25 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT\r
  26 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\r
  27 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT\r
  28 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\r
  29 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\r
  30 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\r
  31 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE\r
  32 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\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 extern void OWINIT();\r
  43 extern void EXTERN_SLEEP();\r
  44 \r
  45 const float k_rs[54] PROGMEM ={0.000000,24.125000,48.585366,72.731707,96.829268,121.097561,145.700000,170.600000,195.650000,220.625000,245.365854,269.853659,294.119048,318.195122,342.166667,366.000000,389.761905,413.428571,437.023810,460.558140,484.047619,507.511628,530.976190,554.418605,577.883721,601.395349,624.952381,648.571429,672.285714,696.073171,719.976190,744.000000,768.146341,792.439024,816.853659,841.414634,866.125000,890.975000,916.000000,941.179487,966.525000,992.025641,1017.717949,1043.589744,1069.657895,1095.945946,1122.432432,1149.184211,1176.189189,1203.472222,1231.083333,1259.000000,1287.285714,1315.941176};\r
  46 //const float j_rs[70] PROGMEM ={0, 18.302913, 34.830476, 50.783019, 70.653704, 90.505455, 110.341818, 130.165455, 149.163636, 160.791071, 180.596364, 200.398214, 220.200000, 240.000000, 250.882883, 270.603636, 290.409091, 310.216364, 330.025455, 342.472727, 360.649091, 380.461818, 400.275000, 420.087273, 435.275676, 450.703636, 470.503636, 490.298214, 510.082456, 523.486726, 540.621053, 560.370175, 580.105172, 591.979487, 610.527119, 630.213559, 644.601653, 660.534426, 680.168852, 690.787097, 710.391935, 729.123810, 740.559375, 760.126562, 770.684615, 790.235385, 800.782812, 820.331250, 834.681250, 850.446032, 870.017460, 880.600000, 900.196774, 911.099187, 930.432787, 950.073333, 960.728333, 980.396667, 1000.078333, 1010.772881, 1030.475862, 1050.187931, 1065.717241, 1080.631034, 1100.358621, 1120.089655, 1131.840000,1150.556897, 1170.294737, 1190.035088};\r
  47         double gettemp_rs(double V) {\r
  48                 uint8_t iv=(uint8_t)(V);\r
  49                 float t0=pgm_read_float(&(k_rs[iv]));\r
  50                 float t1=pgm_read_float(&(k_rs[iv+1]));\r
  51                 return t0+(t1-t0)/1*(V-iv);\r
  52         }\r
  53 \r
  54 \r
  55 uint8_t owid[8]={0x28, 0xA2, 0xD9, 0x84, 0x00, 0x16, 0x02, 0xAC};/**/\r
  56 uint8_t config_info[16]={0x01,0x02,0x00,0x00,0x00,0x00,0x00,0x00,0x02,0x00,0x00,0x00,0x00,0x00,0x00,0x00};\r
  57         \r
  58 #if (owid>128) \r
  59 #error "Variable not correct"\r
  60 #endif\r
  61 \r
  62 extern uint8_t mode;\r
  63 extern uint8_t gcontrol;\r
  64 extern uint8_t reset_indicator;\r
  65 extern uint8_t alarmflag;\r
  66 \r
  67 \r
  68 volatile uint8_t wdcounter;\r
  69 \r
  70 \r
  71 typedef union {\r
  72         volatile uint8_t bytes[8];\r
  73         struct {\r
  74                 uint16_t temp;  //0\r
  75                 uint8_t TH;  //2\r
  76                 uint8_t TL;  //3\r
  77                 uint8_t config;  //4\r
  78                 uint8_t rrFF; //5\r
  79                 uint8_t rr00; //6\r
  80                 uint8_t rr10; //7\r
  81         };\r
  82 } pack_t;\r
  83 volatile pack_t pack;\r
  84 \r
  85 \r
  86 \r
  87 \r
  88 #if  defined(__AVR_ATtiny24__)||defined(__AVR_ATtiny44__)  || defined(__AVR_ATtiny84__) || defined(__AVR_ATtiny24A__)||defined(__AVR_ATtiny44A__)  || defined(__AVR_ATtiny84A__)\r
  89 ISR(WATCHDOG_vect) {\r
  90 #else\r
  91 ISR(WDT_vect) {\r
  92 #endif \r
  93         //sleep_disable();          // Disable Sleep on Wakeup\r
  94         wdcounter++;\r
  95         if (reset_indicator==1) reset_indicator++;\r
  96         else if (reset_indicator==2) mode=0;\r
  97 /*      if (timeout==2) {\r
  98                 DIS_TIMER;\r
  99                 EN_OWINT;\r
 100                 mode=OWM_SLEEP;\r
 101         }\r
 102         timeout++;*/\r
 103         //sleep_enable();           // Enable Sleep Mode\r
 104 \r
 105 }\r
 106 \r
 107 \r
 108 #define OWM_PORT PORTA\r
 109 #define OWM_PIN PINA\r
 110 #define OWM_PINN PINA0\r
 111 #define OWM_DD DDRA\r
 112 \r
 113 #define OWM_SET_LOW OWM_PORT&=~(1<<OWM_PINN);OWM_DD|=(1<<OWM_PINN)\r
 114 #define OWM_SET_HIGH OWM_DD&=~(1<<OWM_PINN);OWM_PORT|=(1<<OWM_PINN)\r
 115 \r
 116 #define OWM_IS_LOW ((OWM_PIN & (1<<OWM_PINN))==0)\r
 117 \r
 118 \r
 119 void owm_init() {\r
 120         OWM_PORT|=(1<<OWM_PINN); //PULL UP\r
 121         OWM_DD&=~(1<<OWM_PINN);\r
 122 }\r
 123 \r
 124 #define owm_delay(us1)  _delay_us(us1)\r
 125 \r
 126 uint8_t owm_reset() {\r
 127         OWM_SET_LOW;\r
 128         owm_delay(480);\r
 129         OWM_SET_HIGH;\r
 130         owm_delay(60);\r
 131         if (OWM_IS_LOW) {owm_delay(420); return 1;} else {owm_delay(420); return 0;}\r
 132         \r
 133         \r
 134 }\r
 135 \r
 136 void owm_rw(uint8_t *b) {\r
 137         uint8_t i;\r
 138         uint8_t pp=1;\r
 139         for(i=0;i<8;i++) {\r
 140                 if (pp&b[0]) {\r
 141                         OWM_SET_LOW;\r
 142                         owm_delay(6);\r
 143                         OWM_SET_HIGH;\r
 144                         owm_delay(9);\r
 145                         if (OWM_IS_LOW) {\r
 146                                 b[0]&=~pp;\r
 147                         }\r
 148                         owm_delay(80-6-9);\r
 149                         \r
 150                         } else {\r
 151                         OWM_SET_LOW;\r
 152                         owm_delay(60);\r
 153                         OWM_SET_HIGH;\r
 154                         owm_delay(20);\r
 155                 }\r
 156                 pp=(pp<<1);\r
 157         }\r
 158 }\r
 159 \r
 160 void owm_block(uint8_t count, uint8_t *buf){\r
 161         uint8_t i;\r
 162         for(i=0;i<count;i++) {\r
 163                 owm_rw(buf+i);\r
 164         }\r
 165 }\r
 166 \r
 167 inline int16_t ow_fconvert(uint8_t b1, uint8_t b2) {
 168         int16_t tsht;
 169         tsht=b1  |((int)b2<<8);
 170         if (b2 & 0x080)
 171         tsht |= 0xFFFFF0000;
 172         return tsht;
 173 }\r
 174 volatile double V,ktemp;\r
 175 \r
 176 uint16_t ADmess() {\r
 177          ADMUX=0b10101101;\r
 178          ADCSRA|=(1<<ADSC);\r
 179          while ((ADCSRA&(1<<ADSC)));\r
 180         return ADC;\r
 181 }\r
 182 \r
 183 int main(void){\r
 184     //PRR|=(1<<PRUSI)|(1<<PRADC);  //Switch off usi and adc for save Power\r
 185         pack.temp=0x0550;\r
 186         pack.config=0x7F;\r
 187         pack.TH=75;\r
 188         pack.TL=70;\r
 189         pack.rrFF=0xFF;\r
 190         pack.rr00=0;\r
 191         pack.rr10=0x10;\r
 192         PORTA=0xFF-(1<<PINA1)-(1<<PINA2);\r
 193         PORTB=0xFF;\r
 194         OWINIT();\r
 195 \r
 196         MCUCR &=~(1<<PUD); //All Pins Pullup...\r
 197         MCUCR |=(1<<BODS);\r
 198 \r
 199         WDTCSR |= ((1<<WDCE) );   // Enable the WD Change Bit//| (1<<WDE)\r
 200         WDTCSR |=   (1<<WDIE) |              // Enable WDT Interrupt\r
 201         (1<<WDP2) | (1<<WDP1);   // Set Timeout to ~1 seconds\r
 202         MCUSR=0;\r
 203         uint8_t block[13];\r
 204         sei();\r
 205         ADCSRA=(1<<ADEN)|(1<<ADPS2)|(1<<ADPS1)|(1<<ADPS0);\r
 206         owm_init();\r
 207         owm_reset();\r
 208         block[0]=0xCC;\r
 209         block[1]=0x4E;\r
 210         block[2]=0;\r
 211         block[3]=0;\r
 212         block[4]=0x1F;\r
 213         owm_block(5,block);\r
 214         owm_reset();\r
 215         block[0]=0x33;\r
 216         for(uint8_t i=1;i<9;i++) {\r
 217                 block[i]=0xFF;\r
 218         }\r
 219         owm_block(9,block);\r
 220         \r
 221         if (block[1]==0x28) {  //DS18B20 angeschlossen\r
 222                 for(uint8_t i=0;i<8;i++) {\r
 223                         owid[i]=block[i+1];\r
 224                 }\r
 225                 while(EECR & (1<<EEPE));\r
 226                 EEAR=E2END-7;\r
 227                 EECR|=(1<EERE);\r
 228                 if (EEDR!=0x28) { //Wenn keine ID im Eeprom uebernimm es\r
 229                         for(uint8_t a=0;a<8;a++) {\r
 230                                 while(EECR & (1<<EEPE));\r
 231                                 EECR = (0<<EEPM1)|(0<<EEPM0);\r
 232                                 EEAR = E2END-7+a;\r
 233                                 EEDR = block[a+1];\r
 234                                 EECR |= (1<<EEMPE);\r
 235                                 EECR |= (1<<EEPE);\r
 236                         }\r
 237                 }\r
 238         }\r
 239         \r
 240         uint16_t ares[16],sum;\r
 241         uint8_t par=0;\r
 242         ares[0]=0;//ADmess();\r
 243         for (par=1;par<16;par++) {\r
 244                 ares[par]=ares[0];\r
 245         }\r
 246         par=0;\r
 247         wdcounter=0;\r
 248         gcontrol=1;\r
 249 \r
 250     while(1)   {\r
 251                 if (wdcounter>0) {\r
 252                         ares[par]=ADmess();\r
 253                         par++;\r
 254                         if (par>15) par=0;\r
 255                         wdcounter=0;\r
 256                 }\r
 257                 if (gcontrol) {\r
 258                         PORTB|=(1<<PORTB0);\r
 259                         sum=0;\r
 260                         for(uint8_t i=0;i<16;i++) {\r
 261                                 sum+=ares[i];\r
 262                         }\r
 263                         V=sum/20.0/1024.0*1.12*1000.0/16.0;\r
 264                         //V=sum/20.0/1024.0*1.01*1000.0/16.0;\r
 265                         ktemp=gettemp_rs(V);\r
 266                         owm_reset();\r
 267                         block[0]=0xCC;\r
 268                         block[1]=0x44;\r
 269                         owm_block(2,block);\r
 270                         _delay_ms(100);\r
 271                         owm_reset();\r
 272                         block[0]=0xCC;\r
 273                         block[1]=0xBE;\r
 274                         for(uint8_t i=0;i<9;i++) block[i+2]=0xFF;\r
 275                         owm_block(11,block);\r
 276                         uint16_t htemp;\r
 277                         if (PINB&(1<<PINB0)) {\r
 278                                 htemp=(ktemp*16+(block[2]|(block[3]<<8)))/10;\r
 279                         } else {\r
 280                                 \r
 281                                 htemp=ktemp*16+(block[2]|(block[3]<<8));\r
 282                         }\r
 283                         uint8_t t8=pack.temp>>4;\r
 284                         uint8_t af=0;\r
 285                         if (t8>pack.TH) af=1;\r
 286                         if (t8<=pack.TL) af=1;\r
 287                         cli();\r
 288                         pack.temp=htemp;\r
 289                         alarmflag=af;\r
 290                         sei();\r
 291                         EXTERN_SLEEP();\r
 292                         PORTB&=~(1<<PORTB0);\r
 293                 }\r
 294 \r
 295                 \r
 296 #if  defined(__AVR_ATtiny25__)||defined(__AVR_ATtiny45__)  || defined(__AVR_ATtiny85__)\r
 297                         if (((TIMSK & (1<<TOIE0))==0)&& (mode==0))\r
 298 #endif                  \r
 299 #if  defined(__AVR_ATtiny24__)||defined(__AVR_ATtiny44__)  || defined(__AVR_ATtiny84__) ||defined(__AVR_ATtiny24A__)||defined(__AVR_ATtiny44A__)  || defined(__AVR_ATtiny84A__)\r
 300                         if (((TIMSK0 & (1<<TOIE0))==0)&& (mode==0))\r
 301 #endif\r
 302                           {\r
 303 //                      CLKPR=(1<<CLKPCE);\r
 304         //              CLKPR=(1<<CLKPS2); /*0.5Mhz*/\r
 305 //                      PORTB&=~(1<<PINB1);\r
 306                         MCUCR|=(1<<SE)|(1<<SM1);\r
 307                         MCUCR&=~(1<<ISC01);\r
 308                 } else {\r
 309                         MCUCR|=(1<<SE);\r
 310                         MCUCR&=~(1<<SM1);\r
 311                 }\r
 312                 asm("SLEEP");\r
 313    }\r
 314 \r
 315 \r
 316 }