DS2438_DHT22/DS2438_DHT22 - Kopie.c

   1 // Copyright (c) 2015, 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 #define FP_CALC\r
  36 #include <avr/io.h>\r
  37 #include <avr/interrupt.h>\r
  38 #include <util/delay.h>\r
  39 #include <avr/wdt.h>\r
  40 #include <avr/sleep.h>\r
  41 \r
  42 extern void OWINIT();\r
  43 \r
  44 \r
  45 uint8_t owid[8]={0x26, 0xA2, 0xD9, 0x84, 0xDD, 0xDD, 0x05, 0xCE};/**/\r
  46 uint8_t config_info[16]={0x01,0x06, 0x05,0x08, 0x04,0x07, 0x00,0x00, 0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00};\r
  47         \r
  48 \r
  49 extern uint8_t mode;\r
  50 extern uint8_t gcontrol;\r
  51 extern uint8_t reset_indicator;\r
  52 extern uint8_t alarmflag;\r
  53 \r
  54 volatile uint8_t wdcounter;\r
  55 \r
  56 \r
  57 typedef union {\r
  58 #if  defined(__AVR_ATtiny25__)\r
  59         volatile uint8_t bytes[16];\r
  60 #else\r
  61         volatile uint8_t bytes[64];\r
  62 #endif\r
  63         struct {\r
  64                 uint8_t status;  //1\r
  65                 int16_t temp;  //2\r
  66                 uint16_t voltage;  //4\r
  67                 uint16_t current;  //6\r
  68                 uint8_t threshold; //8\r
  69                 \r
  70                 uint8_t page1[8]; //9\r
  71 #if  defined(__AVR_ATtiny25__)\r
  72 #else\r
  73                 uint8_t page2[8]; //17\r
  74                 uint8_t page3[8]; //25\r
  75                 uint8_t page4[8];  //33\r
  76                 uint8_t page5[8];  //41\r
  77                 uint8_t page6[8];  //49\r
  78                 uint8_t page7[8];  //57\r
  79                 //uint8_t crc;  //65\r
  80 #endif\r
  81         };\r
  82 } pack_t;\r
  83 volatile pack_t pack;\r
  84 \r
  85 #if  defined(__AVR_ATtiny25__)||defined(__AVR_ATtiny45__)  || defined(__AVR_ATtiny85__)\r
  86 \r
  87 #define DDR_SENSOR   DDRB \r
  88 #define PORT_SENSOR  PORTB\r
  89 #define PIN_SENSOR   PINB\r
  90 #define SENSOR       PB4\r
  91 #endif\r
  92 \r
  93 #if  defined(__AVR_ATtiny24__)||defined(__AVR_ATtiny44__)  || defined(__AVR_ATtiny84__) || defined(__AVR_ATtiny24A__)||defined(__AVR_ATtiny44A__)  || defined(__AVR_ATtiny84A__)\r
  94 #define DDR_SENSOR   DDRA\r
  95 #define PORT_SENSOR  PORTA\r
  96 #define PIN_SENSOR   PINA\r
  97 #define SENSOR       PINA2\r
  98 #endif\r
  99 \r
 100 \r
 101 \r
 102 #define SENSOR_sda_out          DDR_SENSOR |= (1 << SENSOR)\r
 103 #define SENSOR_sda_in                   DDR_SENSOR &= ~(1 << SENSOR);PORT_SENSOR |= (1 << SENSOR) // release sda => hi in consequence of pullup\r
 104 #define SENSOR_sda_low    PORT_SENSOR &= ~(1 << SENSOR)\r
 105 #define SENSOR_is_hi                    PIN_SENSOR & (1 << SENSOR)\r
 106 #define SENSOR_is_low           !(PIN_SENSOR & (1 << SENSOR))\r
 107 \r
 108 volatile int16_t am2302_temp;\r
 109 volatile uint16_t am2302_hum;\r
 110 \r
 111 \r
 112 uint8_t am_wait(uint8_t _time,uint8_t _signal){\r
 113         TCNT1=0;\r
 114         while(TCNT1==0);\r
 115         if (_signal) \r
 116                 while((SENSOR_is_hi)&&(TCNT1<_time)) {}\r
 117         else\r
 118                 while((SENSOR_is_low)&&(TCNT1<_time)) {}\r
 119          \r
 120                 if (TCNT1>=_time) {return 1;}\r
 121         return 0;\r
 122 }\r
 123 \r
 124 volatile uint8_t am2302_mode=0; \r
 125 volatile uint8_t timeout=0;\r
 126 \r
 127 \r
 128 \r
 129 #if  defined(__AVR_ATtiny24__)||defined(__AVR_ATtiny44__)  || defined(__AVR_ATtiny84__) || defined(__AVR_ATtiny24A__)||defined(__AVR_ATtiny44A__)  || defined(__AVR_ATtiny84A__)\r
 130 ISR(WATCHDOG_vect) {\r
 131 #else\r
 132 ISR(WDT_vect) {\r
 133 #endif \r
 134         sleep_disable();          // Disable Sleep on Wakeup\r
 135         am2302_mode++;\r
 136         if (reset_indicator==1) reset_indicator++;\r
 137         else if (reset_indicator==2) mode=0;\r
 138 /*      if (timeout==2) {\r
 139                 DIS_TIMER;\r
 140                 EN_OWINT;\r
 141                 mode=OWM_SLEEP;\r
 142         }\r
 143         timeout++;*/\r
 144         sleep_enable();           // Enable Sleep Mode\r
 145 \r
 146 }\r
 147 \r
 148 int testSW() {\r
 149         uint8_t r;\r
 150         DDRB&=~(1<<PORTB0);  //Eingang\r
 151         __asm__ __volatile__ ("nop");\r
 152         PORTB|=(1<<PORTB0); //Pullup\r
 153         __asm__ __volatile__ ("nop");\r
 154         __asm__ __volatile__ ("nop");\r
 155         __asm__ __volatile__ ("nop");\r
 156         __asm__ __volatile__ ("nop");\r
 157         __asm__ __volatile__ ("nop");\r
 158         r=PINB&(1<<PORTB0);\r
 159         __asm__ __volatile__ ("nop");\r
 160         PORTB&=~(1<<PORTB0);\r
 161         __asm__ __volatile__ ("nop");\r
 162         DDRB|=(1<<PORTB0);  //Eingang\r
 163         return (r==0);\r
 164         \r
 165         \r
 166 }       \r
 167         \r
 168 uint8_t am2302_1() {\r
 169         int16_t lam2302_temp;\r
 170         uint16_t lam2302_hum;\r
 171         uint8_t rSREG;\r
 172         uint8_t sensor_data[5];\r
 173 #if  defined(__AVR_ATtiny25__)||defined(__AVR_ATtiny45__)  || defined(__AVR_ATtiny85__)\r
 174         TCCR1=(1<<CS12); //Clock/8 1µs\r
 175 #endif\r
 176 \r
 177 #if  defined(__AVR_ATtiny24__)||defined(__AVR_ATtiny44__)  || defined(__AVR_ATtiny84__) || defined(__AVR_ATtiny24A__)||defined(__AVR_ATtiny44A__)  || defined(__AVR_ATtiny84A__)\r
 178         TCCR1B=(1<<CS11); //Clock/8 1µs\r
 179 #endif\r
 180         SENSOR_sda_out;\r
 181         SENSOR_sda_low; // MCU start signal\r
 182         TCNT1=0;while(TCNT1==0);while(TCNT1<250) {}// start signal (pull sda down for min 0.8ms and maximum 20ms)\r
 183         TCNT1=0;while(TCNT1==0);while(TCNT1<250) {}// start signal (pull sda down for min 0.8ms and maximum 20ms)\r
 184         SENSOR_sda_in;\r
 185         if (am_wait(200,1)) return 2;\r
 186 \r
 187         // AM2302 response signal min: 75us typ:80us max:85us\r
 188         if (am_wait(100,0)) return 3;\r
 189         if (am_wait(100,1)) return 4;\r
 190         \r
 191         for(uint8_t i = 0; i < 5; i++)  {\r
 192                 uint8_t sensor_byte = 0;\r
 193                 for(uint8_t j = 1; j <= 8; j++) {// get 8 bits from sensor\r
 194                         if (am_wait(88,0)) return 5;\r
 195                         \r
 196                         TCNT1=0;while(TCNT1==0);;while(TCNT1<35)                ;\r
 197                         sensor_byte <<= 1; // add new lower byte\r
 198                         if (SENSOR_is_hi) {// if sda high after 30us => bit=1 else bit=0\r
 199                                 sensor_byte |= 1;\r
 200                                 if (am_wait(45,1)) return 6;// 30us - 75us = 45us\r
 201                         }\r
 202                 }\r
 203                 sensor_data[i] = sensor_byte;\r
 204         }\r
 205 \r
 206         // checksum\r
 207         if ( ((sensor_data[0]+sensor_data[1]+sensor_data[2]+sensor_data[3]) & 0xff ) != sensor_data[4])\r
 208         {\r
 209                 // debug output\r
 210                 //printf("%b %b %b %b %b %b" CR, sensor_data[0], sensor_data[1], sensor_data[2], sensor_data[3], sensor_data[4], ((sensor_data[0]+sensor_data[1]+sensor_data[2]+sensor_data[3]) & 0xff ));\r
 211                 PORTB&=~(1<<PINB0);\r
 212                 return 7;\r
 213         }\r
 214         if (!testSW()) {\r
 215 #ifdef FP_CALC\r
 216         double htemp;\r
 217         if (sensor_data[2]&0x80) { //min\r
 218                 sensor_data[2]&=~(0x80);\r
 219                 htemp=-((sensor_data[2]<<8) + sensor_data[3]);\r
 220         } else\r
 221                 htemp=((sensor_data[2]<<8) + sensor_data[3]);\r
 222         double hhum=(1.0546-0.000216*htemp)*((sensor_data[0]<<8) + sensor_data[1]);\r
 223         \r
 224         lam2302_hum=0.318*hhum +76;\r
 225         lam2302_temp=htemp*25.6;\r
 226 #else\r
 227 \r
 228         if (sensor_data[2]&0x80) { //minus\r
 229                 sensor_data[2]&=~(0x80);\r
 230                 lam2302_temp=-((sensor_data[2]<<8) + sensor_data[3]);\r
 231         } else\r
 232                 lam2302_temp=((sensor_data[2]<<8) + sensor_data[3]);\r
 233         \r
 234         lam2302_hum=((sensor_data[0]<<8) + sensor_data[1]);\r
 235         volatile uint32_t h1=lam2302_temp*lam2302_hum*3/44803;\r
 236         lam2302_hum=lam2302_hum*16/49-h1+80;\r
 237         //lam2302_temp=lam2302_temp*128/5;\r
 238 \r
 239         int16_t h2=lam2302_temp%5;\r
 240         lam2302_temp=lam2302_temp/5;\r
 241         lam2302_temp*=128;\r
 242         lam2302_temp+=h2*128/5;\r
 243 #endif    \r
 244         config_info[5]=7;\r
 245         }\r
 246         else {\r
 247                 if (sensor_data[2]&0x80) { //minus\r
 248                         sensor_data[2]&=~(0x80);\r
 249                         lam2302_temp=-((sensor_data[2]<<8) + sensor_data[3]);\r
 250                 } else\r
 251                 lam2302_temp=((sensor_data[2]<<8) + sensor_data[3])*25.6;;\r
 252                 \r
 253                 lam2302_hum=((sensor_data[0]<<8) + sensor_data[1]);\r
 254                 config_info[5]=12;\r
 255         }\r
 256         rSREG=SREG;\r
 257         cli();\r
 258         am2302_hum=lam2302_hum;\r
 259         am2302_temp=lam2302_temp;\r
 260         SREG=rSREG;\r
 261         return 0;\r
 262 }\r
 263 \r
 264 \r
 265 uint8_t am2302_2() { //4mhz\r
 266         int16_t lam2302_temp;\r
 267         uint16_t lam2302_hum;\r
 268         uint8_t rSREG;\r
 269         uint8_t sensor_data[5];\r
 270         #if  defined(__AVR_ATtiny25__)||defined(__AVR_ATtiny45__)  || defined(__AVR_ATtiny85__)\r
 271         TCCR1=(1<<CS11)|(1<<CS10); //Clock/8 1µs\r
 272         #endif\r
 273 \r
 274         #if  defined(__AVR_ATtiny24__)||defined(__AVR_ATtiny44__)  || defined(__AVR_ATtiny84__) || defined(__AVR_ATtiny24A__)||defined(__AVR_ATtiny44A__)  || defined(__AVR_ATtiny84A__)\r
 275         TCCR1B=(1<<CS11); //Clock/8 1µs\r
 276         #endif\r
 277         SENSOR_sda_out;\r
 278         SENSOR_sda_low; // MCU start signal\r
 279         TCNT1=0;while(TCNT1==0);while(TCNT1<250) {}// start signal (pull sda down for min 0.8ms and maximum 20ms)\r
 280         TCNT1=0;while(TCNT1==0);while(TCNT1<250) {}// start signal (pull sda down for min 0.8ms and maximum 20ms)\r
 281         SENSOR_sda_in;\r
 282         if (am_wait(200,1)) return 2;\r
 283 \r
 284         // AM2302 response signal min: 75us typ:80us max:85us\r
 285         if (am_wait(100,0)) return 3;\r
 286         if (am_wait(100,1)) return 4;\r
 287         \r
 288         for(uint8_t i = 0; i < 5; i++)  {\r
 289                 uint8_t sensor_byte = 0;\r
 290                 for(uint8_t j = 1; j <= 8; j++) {// get 8 bits from sensor\r
 291                         if (am_wait(88,0)) return 5;\r
 292                         \r
 293                         TCNT1=0;while(TCNT1==0);;while(TCNT1<35)                ;\r
 294                         sensor_byte <<= 1; // add new lower byte\r
 295                         if (SENSOR_is_hi) {// if sda high after 30us => bit=1 else bit=0\r
 296                                 sensor_byte |= 1;\r
 297                                 if (am_wait(45,1)) return 6;// 30us - 75us = 45us\r
 298                         }\r
 299                 }\r
 300                 sensor_data[i] = sensor_byte;\r
 301         }\r
 302 \r
 303         // checksum\r
 304         if ( ((sensor_data[0]+sensor_data[1]+sensor_data[2]+sensor_data[3]) & 0xff ) != sensor_data[4])\r
 305         {\r
 306                 // debug output\r
 307                 //printf("%b %b %b %b %b %b" CR, sensor_data[0], sensor_data[1], sensor_data[2], sensor_data[3], sensor_data[4], ((sensor_data[0]+sensor_data[1]+sensor_data[2]+sensor_data[3]) & 0xff ));\r
 308                 PORTB&=~(1<<PINB0);\r
 309                 return 7;\r
 310         }\r
 311 #ifdef FP_CALC\r
 312         lam2302_hum=0.318* ((sensor_data[0]<<8) + sensor_data[1])+76;\r
 313         if (sensor_data[2]&0x80) { //minus\r
 314                 sensor_data[2]&=~(0x80);\r
 315                 lam2302_temp=-((sensor_data[2]<<8) + sensor_data[3])*25.6;\r
 316         } else\r
 317                 lam2302_temp=((sensor_data[2]<<8) + sensor_data[3])*25.6;\r
 318 #else\r
 319 \r
 320 \r
 321         if (sensor_data[2]&0x80) { //minus\r
 322                 sensor_data[2]&=~(0x80);\r
 323                 lam2302_temp=-((sensor_data[2]<<8) + sensor_data[3]);\r
 324         } else\r
 325         lam2302_temp=((sensor_data[2]<<8) + sensor_data[3]);\r
 326         \r
 327         lam2302_hum=((sensor_data[0]<<8) + sensor_data[1]);\r
 328         volatile uint32_t h1=lam2302_temp*lam2302_hum*3/44803;\r
 329         lam2302_hum=lam2302_hum*16/49-h1+80;\r
 330         //lam2302_temp=lam2302_temp*128/5;\r
 331 \r
 332         int16_t h2=lam2302_temp%5;\r
 333         lam2302_temp=lam2302_temp/5;\r
 334         lam2302_temp*=128;\r
 335         lam2302_temp+=h2*128/5;\r
 336 #endif  \r
 337         \r
 338         \r
 339         rSREG=SREG;\r
 340         cli();\r
 341         am2302_hum=lam2302_hum;\r
 342         am2302_temp=lam2302_temp;\r
 343         SREG=rSREG;\r
 344         return 0;\r
 345 }\r
 346 \r
 347 \r
 348 \r
 349 int main(void){\r
 350     PRR|=(1<<PRUSI)|(1<<PRADC);  //Switch off usi and adc for save Power\r
 351 #if  defined(__AVR_ATtiny24__)||defined(__AVR_ATtiny44__)  || defined(__AVR_ATtiny84__) || defined(__AVR_ATtiny24A__)||defined(__AVR_ATtiny44A__)  || defined(__AVR_ATtiny84A__)\r
 352         PORTA=0xFF;\r
 353         PORTB=0xFF-(1<<PORTB0); //Schalter kann gegen Masse sein und zieht dann immer Strom\r
 354         DDRB|=(1<<PORTB0); //Als Ausgang und 0\r
 355 #endif\r
 356         OWINIT();\r
 357 \r
 358         ACSR|=(1<<ACD);  //Disable Comparator\r
 359         ADCSRB|=(1<<ACME); //Disable Analog multiplexer\r
 360         MCUCR &=~(1<<PUD); //All Pins Pullup...\r
 361         MCUCR |=(1<<BODS);\r
 362         MCUCR &=~(1<<PUD);\r
 363         \r
 364 #if  defined(__AVR_ATtiny25__)||defined(__AVR_ATtiny45__)  || defined(__AVR_ATtiny85__)\r
 365 \r
 366         PORTB|=(1<<PINB0)|(1<<PINB1)|(1<<PINB3)|(1<<PINB4)|(1<<PINB5);\r
 367         DDRB|=(1<<PINB1); //DBLINE\r
 368 #define SENSON PORTB|=(1<<PINB0);\r
 369 #define SENSOFF PORTB&=~(1<<PINB0);\r
 370         DDRB|=(1<<PINB0); //stromversorgung\r
 371         \r
 372         // Set up Watch Dog Timer for Inactivity\r
 373         WDTCR |= ((1<<WDCE) | (1<<WDE));   // Enable the WD Change Bit\r
 374         WDTCR =   (1<<WDIE) |              // Enable WDT Interrupt\r
 375         (1<<WDP2) | (1<<WDP1);   // Set Timeout to ~2 seconds\r
 376 #endif\r
 377 \r
 378 #if  defined(__AVR_ATtiny24__)||defined(__AVR_ATtiny44__)  || defined(__AVR_ATtiny84__) || defined(__AVR_ATtiny24A__)||defined(__AVR_ATtiny44A__)  || defined(__AVR_ATtiny84A__)\r
 379 \r
 380 \r
 381         DDRA|=(1<<PINA1); //stromversorgung\r
 382 #define SENSON PORTA|=(1<<PINA1);\r
 383 #define SENSOFF PORTA&=~(1<<PINA1);\r
 384 \r
 385         // Set up Watch Dog Timer for Inactivity\r
 386         WDTCSR |= (1<<WDCE) ;   // Enable the WD Change Bit\r
 387         WDTCSR =   (1<<WDIE) |              // Enable WDT Interrupt\r
 388         (1<<WDP2) | (1<<WDP1);   // Set Timeout to ~2 seconds\r
 389 #endif\r
 390 \r
 391         \r
 392     uint8_t i;\r
 393         uint8_t err;\r
 394 #if  defined(__AVR_ATtiny25__)\r
 395     for(i=0;i<16;i++) pack.bytes[i]=0;\r
 396 #else\r
 397         uint8_t pn=1;\r
 398     for(i=0;i<64;i++) pack.bytes[i]=0;\r
 399 #endif\r
 400         //pack.bytes[0]=1;\r
 401         //pack.bytes[1]=2;\r
 402         SENSON\r
 403         _delay_ms(4000);\r
 404         err =am2302_1();\r
 405         sei();\r
 406     while(1)   {\r
 407                 alarmflag=1;\r
 408                 if (am2302_mode==2) {\r
 409                         err=am2302_1();\r
 410                         if (err!=0) {\r
 411 #if  defined(__AVR_ATtiny25__)\r
 412 #else\r
 413                                 pack.page3[pn]=err;\r
 414                                 pn=pn+1;if (pn>31) pn=1;\r
 415 #endif\r
 416                         }\r
 417                         SENSOFF\r
 418                         am2302_mode=3;\r
 419                 }\r
 420                 if (am2302_mode>=8) {\r
 421                         am2302_mode=0;\r
 422                         SENSON\r
 423                 }\r
 424 #if  defined(__AVR_ATtiny25__)||defined(__AVR_ATtiny45__)  || defined(__AVR_ATtiny85__)\r
 425                         if (((TIMSK & (1<<TOIE0))==0)&& (mode==0))\r
 426 #endif                  \r
 427 #if  defined(__AVR_ATtiny24__)||defined(__AVR_ATtiny44__)  || defined(__AVR_ATtiny84__) || defined(__AVR_ATtiny24A__)||defined(__AVR_ATtiny44A__)  || defined(__AVR_ATtiny84A__)\r
 428                         if (((TIMSK0 & (1<<TOIE0))==0)&& (mode==0))\r
 429 #endif\r
 430                           {\r
 431 //                      CLKPR=(1<<CLKPCE);\r
 432         //              CLKPR=(1<<CLKPS2); /*0.5Mhz*/\r
 433                         //PORTB&=~(1<<PINB1);\r
 434                         MCUCR|=(1<<SE)|(1<<SM1);\r
 435                         MCUCR&=~(1<<ISC01);\r
 436                 } else {\r
 437                         MCUCR|=(1<<SE);\r
 438                         MCUCR&=~(1<<SM1);\r
 439                 }\r
 440                 asm("SLEEP");\r
 441    }\r
 442 \r
 443 \r
 444 }