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
36 #include <avr/interrupt.h>
37 #include <util/delay.h>
39 #include <avr/sleep.h>
40 #include <avr/pgmspace.h>
44 extern void EXTERN_SLEEP();
46 uint8_t owid[8]={0x26, 0xA2, 0xD9, 0x84, 0xDD, 0xDD, 0x05, 0xCE};/**/
47 uint8_t config_info[16]={0x01,0x06, 0x05,0x08, 0x04,0x07, 0x00,0x00, 0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
52 extern uint8_t gcontrol;
53 extern uint8_t reset_indicator;
54 extern uint8_t alarmflag;
56 volatile uint8_t wdcounter;
61 volatile uint8_t bytes[64];
67 uint8_t threshold; //8
70 uint8_t page2[8]; //17
71 uint8_t page3[8]; //25
72 uint8_t page4[8]; //33
73 uint8_t page5[8]; //41
74 uint8_t page6[8]; //49
75 uint8_t page7[8]; //57
82 #define DDR_SENSOR DDRA
83 #define PORT_SENSOR PORTA
84 #define PIN_SENSOR PINA
87 #define SENSOR_sda_out DDR_SENSOR |= (1 << SENSOR)
88 #define SENSOR_sda_in DDR_SENSOR &= ~(1 << SENSOR);PORT_SENSOR |= (1 << SENSOR) // release sda => hi in consequence of pullup
89 #define SENSOR_sda_low PORT_SENSOR &= ~(1 << SENSOR)
90 #define SENSOR_is_hi PIN_SENSOR & (1 << SENSOR)
91 #define SENSOR_is_low !(PIN_SENSOR & (1 << SENSOR))
93 volatile int16_t am2302_temp;
94 volatile uint16_t am2302_hum;
97 uint8_t am_wait(uint8_t _time,uint8_t _signal){
101 while((SENSOR_is_hi)&&(TCNT1<_time)) {}
103 while((SENSOR_is_low)&&(TCNT1<_time)) {}
105 if (TCNT1>=_time) {return 1;}
109 volatile uint8_t am2302_mode=0;
110 volatile uint8_t timeout=0;
117 uint8_t userRegister[1];
119 volatile double temperatureC,humidityRH;
122 #if defined(__AVR_ATtiny24__)||defined(__AVR_ATtiny44__) || defined(__AVR_ATtiny84__) || defined(__AVR_ATtiny24A__)||defined(__AVR_ATtiny44A__) || defined(__AVR_ATtiny84A__)
128 if (reset_indicator==1) reset_indicator++;
129 else if (reset_indicator==2) mode=0;
134 DDRB&=~(1<<PORTB0); //Eingang
135 __asm__ __volatile__ ("nop");
136 PORTB|=(1<<PORTB0); //Pullup
137 __asm__ __volatile__ ("nop");
138 __asm__ __volatile__ ("nop");
139 __asm__ __volatile__ ("nop");
140 __asm__ __volatile__ ("nop");
141 __asm__ __volatile__ ("nop");
143 __asm__ __volatile__ ("nop");
145 __asm__ __volatile__ ("nop");
146 DDRB|=(1<<PORTB0); //Eingang
151 int16_t lam2302_temp;
152 uint16_t lam2302_hum;
154 uint8_t sensor_data[5];
156 TCCR1B=(1<<CS11); //Clock/8 1µs
159 SENSOR_sda_low; // MCU start signal
160 TCNT1=0;while(TCNT1==0);while(TCNT1<250) {}// start signal (pull sda down for min 0.8ms and maximum 20ms)
161 TCNT1=0;while(TCNT1==0);while(TCNT1<250) {}// start signal (pull sda down for min 0.8ms and maximum 20ms)
163 if (am_wait(200,1)) return 2;
165 // AM2302 response signal min: 75us typ:80us max:85us or 500us different types
166 if (am_wait(100,0)) return 3;
167 if (am_wait(100,1)) return 4;
169 for(uint8_t i = 0; i < 5; i++) {
170 uint8_t sensor_byte = 0;
171 for(uint8_t j = 1; j <= 8; j++) {// get 8 bits from sensor
172 if (am_wait(88,0)) return 5;
174 TCNT1=0;while(TCNT1==0);;while(TCNT1<35) ;
175 sensor_byte <<= 1; // add new lower byte
176 if (SENSOR_is_hi) {// if sda high after 30us => bit=1 else bit=0
178 if (am_wait(45,1)) return 6;// 30us - 75us = 45us
181 sensor_data[i] = sensor_byte;
185 if ( ((sensor_data[0]+sensor_data[1]+sensor_data[2]+sensor_data[3]) & 0xff ) != sensor_data[4])
190 if (sensor_data[2]&0x80) { //minus
191 sensor_data[2]&=~(0x80);
192 lam2302_temp=-((sensor_data[2]<<8) + sensor_data[3]);
194 lam2302_temp=((sensor_data[2]<<8) + sensor_data[3]);
196 double htemp=lam2302_temp;
197 double hhum=(1.0546-0.000216*htemp)*((sensor_data[0]<<8) + sensor_data[1]);
198 //htemp=Temperauter * 10
199 //lam2302_hum=0.318*hhum +76;
200 lam2302_hum=0.31*hhum +80; //hhum = Hum*10 -> 5V also all *5
205 lam2302_hum=((sensor_data[0]<<8) + sensor_data[1]);
208 lam2302_temp=lam2302_temp*25.6;
211 am2302_hum=lam2302_hum;
212 am2302_temp=lam2302_temp;
225 PRR|=(1<<PRUSI)|(1<<PRADC); // adc and usi for save Power
227 PORTB=0xFF-(1<<PORTB0); //Schalter kann gegen Masse sein und zieht dann immer Strom
228 DDRB|=(1<<PORTB0); //Als Ausgang und 0
233 ACSR|=(1<<ACD); //Disable Comparator
234 ADCSRB|=(1<<ACME); //Disable Analog multiplexer
235 MCUCR &=~(1<<PUD); //All Pins Pullup...
239 DDRA|=(1<<PINA1); //stromversorgung
240 #define SENSON PORTA|=(1<<PINA1);
241 #define SENSOFF PORTA&=~(1<<PINA1);
243 // Set up Watch Dog Timer for Inactivity
244 WDTCSR |= (1<<WDCE) ; // Enable the WD Change Bit
245 WDTCSR = (1<<WDIE) | // Enable WDT Interrupt
246 (1<<WDP2) | (1<<WDP1); // Set Timeout to ~2 seconds
249 config_info[5]=12; //hum *10
251 config_info[5]=7; //HIH4031
255 for(i=0;i<64;i++) pack.bytes[i]=0;
278 pn=pn+1;if (pn>31) pn=1;
290 if (((TIMSK0 & (1<<TOIE0))==0)&& (mode==0)) {
291 MCUCR|=(1<<SE)|(1<<SM1);