1 // Copyright (c) 2015, Tobias Mueller tm(at)tm3d.de
2 // All rights reserved.
4 // Redistribution and use in source and binary forms, with or without
5 // modification, are permitted provided that the following conditions are
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
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.
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.
34 #define F_CPU 8000000UL
37 #include <avr/interrupt.h>
38 #include <util/delay.h>
40 #include <avr/sleep.h>
45 uint8_t owid[8]={0x26, 0xA2, 0xD9, 0x84, 0x00, 0x00, 0x05, 0x16};/**/
49 extern uint8_t gcontrol;
50 extern uint8_t reset_indicator;
51 extern uint8_t alarmflag;
53 volatile uint8_t wdcounter;
57 #if defined(__AVR_ATtiny25__)
58 volatile uint8_t bytes[16];
60 volatile uint8_t bytes[64];
67 uint8_t threshold; //8
70 #if defined(__AVR_ATtiny25__)
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
84 #if defined(__AVR_ATtiny25__)||defined(__AVR_ATtiny45__) || defined(__AVR_ATtiny85__)
86 #define DDR_SENSOR DDRB
87 #define PORT_SENSOR PORTB
88 #define PIN_SENSOR PINB
92 #if defined(__AVR_ATtiny24__)||defined(__AVR_ATtiny44__) || defined(__AVR_ATtiny84__) || defined(__AVR_ATtiny24A__)||defined(__AVR_ATtiny44A__) || defined(__AVR_ATtiny84A__)
93 #define DDR_SENSOR DDRA
94 #define PORT_SENSOR PORTA
95 #define PIN_SENSOR PINA
101 #define SENSOR_sda_out DDR_SENSOR |= (1 << SENSOR)
102 #define SENSOR_sda_in DDR_SENSOR &= ~(1 << SENSOR);PORT_SENSOR |= (1 << SENSOR) // release sda => hi in consequence of pullup
103 #define SENSOR_sda_low PORT_SENSOR &= ~(1 << SENSOR)
104 #define SENSOR_is_hi PIN_SENSOR & (1 << SENSOR)
105 #define SENSOR_is_low !(PIN_SENSOR & (1 << SENSOR))
107 volatile int16_t am2302_temp;
108 volatile uint16_t am2302_hum;
111 uint8_t am_wait(uint8_t _time,uint8_t _signal){
115 while((SENSOR_is_hi)&&(TCNT1<_time)) {}
117 while((SENSOR_is_low)&&(TCNT1<_time)) {}
119 if (TCNT1>=_time) {return 1;}
123 volatile uint8_t am2302_mode=0;
124 volatile uint8_t timeout=0;
128 #if defined(__AVR_ATtiny24__)||defined(__AVR_ATtiny44__) || defined(__AVR_ATtiny84__) || defined(__AVR_ATtiny24A__)||defined(__AVR_ATtiny44A__) || defined(__AVR_ATtiny84A__)
133 sleep_disable(); // Disable Sleep on Wakeup
135 if (reset_indicator==1) reset_indicator++;
136 else if (reset_indicator==2) mode=0;
143 sleep_enable(); // Enable Sleep Mode
150 int16_t lam2302_temp;
151 uint16_t lam2302_hum;
153 uint8_t sensor_data[5];
154 #if defined(__AVR_ATtiny25__)||defined(__AVR_ATtiny45__) || defined(__AVR_ATtiny85__)
155 TCCR1=(1<<CS12); //Clock/8 1µs
158 #if defined(__AVR_ATtiny24__)||defined(__AVR_ATtiny44__) || defined(__AVR_ATtiny84__) || defined(__AVR_ATtiny24A__)||defined(__AVR_ATtiny44A__) || defined(__AVR_ATtiny84A__)
159 TCCR1B=(1<<CS11); //Clock/8 1µs
162 SENSOR_sda_low; // MCU start signal
163 TCNT1=0;while(TCNT1==0);while(TCNT1<250) {}// start signal (pull sda down for min 0.8ms and maximum 20ms)
164 TCNT1=0;while(TCNT1==0);while(TCNT1<250) {}// start signal (pull sda down for min 0.8ms and maximum 20ms)
166 if (am_wait(200,1)) return 2;
168 // AM2302 response signal min: 75us typ:80us max:85us
169 if (am_wait(100,0)) return 3;
170 if (am_wait(100,1)) return 4;
172 for(uint8_t i = 0; i < 5; i++) {
173 uint8_t sensor_byte = 0;
174 for(uint8_t j = 1; j <= 8; j++) {// get 8 bits from sensor
175 if (am_wait(88,0)) return 5;
177 TCNT1=0;while(TCNT1==0);;while(TCNT1<35) ;
178 sensor_byte <<= 1; // add new lower byte
179 if (SENSOR_is_hi) {// if sda high after 30us => bit=1 else bit=0
181 if (am_wait(45,1)) return 6;// 30us - 75us = 45us
184 sensor_data[i] = sensor_byte;
188 if ( ((sensor_data[0]+sensor_data[1]+sensor_data[2]+sensor_data[3]) & 0xff ) != sensor_data[4])
191 //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 ));
197 if (sensor_data[2]&0x80) { //min
198 sensor_data[2]&=~(0x80);
199 htemp=-((sensor_data[2]<<8) + sensor_data[3]);
201 htemp=((sensor_data[2]<<8) + sensor_data[3]);
202 double hhum=(1.0546-0.000216*htemp)*((sensor_data[0]<<8) + sensor_data[1]);
204 lam2302_hum=0.318*hhum +76;
205 lam2302_temp=htemp*25.6;
208 if (sensor_data[2]&0x80) { //minus
209 sensor_data[2]&=~(0x80);
210 lam2302_temp=-((sensor_data[2]<<8) + sensor_data[3]);
212 lam2302_temp=((sensor_data[2]<<8) + sensor_data[3]);
214 lam2302_hum=((sensor_data[0]<<8) + sensor_data[1]);
215 volatile uint32_t h1=lam2302_temp*lam2302_hum*3/44803;
216 lam2302_hum=lam2302_hum*16/49-h1+80;
217 //lam2302_temp=lam2302_temp*128/5;
219 int16_t h2=lam2302_temp%5;
220 lam2302_temp=lam2302_temp/5;
222 lam2302_temp+=h2*128/5;
226 am2302_hum=lam2302_hum;
227 am2302_temp=lam2302_temp;
233 uint8_t am2302_2() { //4mhz
234 int16_t lam2302_temp;
235 uint16_t lam2302_hum;
237 uint8_t sensor_data[5];
238 #if defined(__AVR_ATtiny25__)||defined(__AVR_ATtiny45__) || defined(__AVR_ATtiny85__)
239 TCCR1=(1<<CS11)|(1<<CS10); //Clock/8 1µs
242 #if defined(__AVR_ATtiny24__)||defined(__AVR_ATtiny44__) || defined(__AVR_ATtiny84__) || defined(__AVR_ATtiny24A__)||defined(__AVR_ATtiny44A__) || defined(__AVR_ATtiny84A__)
243 TCCR1B=(1<<CS11); //Clock/8 1µs
246 SENSOR_sda_low; // MCU start signal
247 TCNT1=0;while(TCNT1==0);while(TCNT1<250) {}// start signal (pull sda down for min 0.8ms and maximum 20ms)
248 TCNT1=0;while(TCNT1==0);while(TCNT1<250) {}// start signal (pull sda down for min 0.8ms and maximum 20ms)
250 if (am_wait(200,1)) return 2;
252 // AM2302 response signal min: 75us typ:80us max:85us
253 if (am_wait(100,0)) return 3;
254 if (am_wait(100,1)) return 4;
256 for(uint8_t i = 0; i < 5; i++) {
257 uint8_t sensor_byte = 0;
258 for(uint8_t j = 1; j <= 8; j++) {// get 8 bits from sensor
259 if (am_wait(88,0)) return 5;
261 TCNT1=0;while(TCNT1==0);;while(TCNT1<35) ;
262 sensor_byte <<= 1; // add new lower byte
263 if (SENSOR_is_hi) {// if sda high after 30us => bit=1 else bit=0
265 if (am_wait(45,1)) return 6;// 30us - 75us = 45us
268 sensor_data[i] = sensor_byte;
272 if ( ((sensor_data[0]+sensor_data[1]+sensor_data[2]+sensor_data[3]) & 0xff ) != sensor_data[4])
275 //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 ));
280 lam2302_hum=0.318* ((sensor_data[0]<<8) + sensor_data[1])+76;
281 if (sensor_data[2]&0x80) { //minus
282 sensor_data[2]&=~(0x80);
283 lam2302_temp=-((sensor_data[2]<<8) + sensor_data[3])*25.6;
285 lam2302_temp=((sensor_data[2]<<8) + sensor_data[3])*25.6;
289 if (sensor_data[2]&0x80) { //minus
290 sensor_data[2]&=~(0x80);
291 lam2302_temp=-((sensor_data[2]<<8) + sensor_data[3]);
293 lam2302_temp=((sensor_data[2]<<8) + sensor_data[3]);
295 lam2302_hum=((sensor_data[0]<<8) + sensor_data[1]);
296 volatile uint32_t h1=lam2302_temp*lam2302_hum*3/44803;
297 lam2302_hum=lam2302_hum*16/49-h1+80;
298 //lam2302_temp=lam2302_temp*128/5;
300 int16_t h2=lam2302_temp%5;
301 lam2302_temp=lam2302_temp/5;
303 lam2302_temp+=h2*128/5;
309 am2302_hum=lam2302_hum;
310 am2302_temp=lam2302_temp;
317 PRR|=(1<<PRUSI)|(1<<PRADC); //Switch off usi and adc for save Power
321 ACSR|=(1<<ACD); //Disable Comparator
322 ADCSRB|=(1<<ACME); //Disable Analog multiplexer
323 MCUCR &=~(1<<PUD); //All Pins Pullup...
327 #if defined(__AVR_ATtiny25__)||defined(__AVR_ATtiny45__) || defined(__AVR_ATtiny85__)
329 PORTB|=(1<<PINB0)|(1<<PINB1)|(1<<PINB3)|(1<<PINB4)|(1<<PINB5);
330 DDRB|=(1<<PINB1); //DBLINE
331 #define SENSON PORTB|=(1<<PINB0);
332 #define SENSOFF PORTB&=~(1<<PINB0);
333 DDRB|=(1<<PINB0); //stromversorgung
335 // Set up Watch Dog Timer for Inactivity
336 WDTCR |= ((1<<WDCE) | (1<<WDE)); // Enable the WD Change Bit
337 WDTCR = (1<<WDIE) | // Enable WDT Interrupt
338 (1<<WDP2) | (1<<WDP1); // Set Timeout to ~2 seconds
341 #if defined(__AVR_ATtiny24__)||defined(__AVR_ATtiny44__) || defined(__AVR_ATtiny84__) || defined(__AVR_ATtiny24A__)||defined(__AVR_ATtiny44A__) || defined(__AVR_ATtiny84A__)
343 //PORTB|=(1<<PINB0)|(1<<PINB1)|(1<<PINB3)|(1<<PINB4)|(1<<PINB5);
345 DDRA|=(1<<PINA1); //stromversorgung
346 #define SENSON PORTA|=(1<<PINA1);
347 #define SENSOFF PORTA&=~(1<<PINA1);
349 // Set up Watch Dog Timer for Inactivity
350 WDTCSR |= (1<<WDCE) ; // Enable the WD Change Bit
351 WDTCSR = (1<<WDIE) | // Enable WDT Interrupt
352 (1<<WDP2) | (1<<WDP1); // Set Timeout to ~2 seconds
358 #if defined(__AVR_ATtiny25__)
359 for(i=0;i<16;i++) pack.bytes[i]=0;
362 for(i=0;i<64;i++) pack.bytes[i]=0;
372 if (am2302_mode==2) {
375 #if defined(__AVR_ATtiny25__)
378 pn=pn+1;if (pn>31) pn=1;
384 if (am2302_mode>=8) {
388 #if defined(__AVR_ATtiny25__)||defined(__AVR_ATtiny45__) || defined(__AVR_ATtiny85__)
389 if (((TIMSK & (1<<TOIE0))==0)&& (mode==0))
391 #if defined(__AVR_ATtiny24__)||defined(__AVR_ATtiny44__) || defined(__AVR_ATtiny84__) || defined(__AVR_ATtiny24A__)||defined(__AVR_ATtiny44A__) || defined(__AVR_ATtiny84A__)
392 if (((TIMSK0 & (1<<TOIE0))==0)&& (mode==0))
395 // CLKPR=(1<<CLKPCE);
396 // CLKPR=(1<<CLKPS2); /*0.5Mhz*/
397 //PORTB&=~(1<<PINB1);
398 MCUCR|=(1<<SE)|(1<<SM1);