greenhouse

greenhouse Commit Details

Date:2012-05-13 12:46:57 (1 year 5 days ago)
Author:Ciaran Gultnieks
Branch:master
Commit:4c717cf766fc88dbd14a6daad075dde89c329ffa
Parents: 3272de446dc83c81a7acf4ba33b355fdd12c158e
Message:Save some power, and build without silly IDE
Changes:
Darduino/greenhouse.pde (full)
Aarduino/.gitignore (full)
Aarduino/Makefile (full)
Aarduino/dht11.cpp (full)
Aarduino/dht11.h (full)
Aarduino/greenhouse.cpp (full)

File differences

arduino/.gitignore
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bin/␊
arduino/Makefile
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␊
PORT=/dev/ttyACM0␊
ARDUINO_DIR=/usr/share/arduino␊
BOARD_TYPE=arduino␊
BAUD_RATE=115200␊
MCU=atmega328p␊
DF_CPU=16000000␊
CORE_C_FILES=pins_arduino wiring wiring_digital␊
CORE_CPP_FILES=main HardwareSerial Print␊
CPP_FILES=greenhouse dht11␊
␊
ARDUINO_CORE=$(ARDUINO_DIR)/hardware/arduino/cores/arduino␊
INCLUDE=-I. -I$(ARDUINO_DIR)/hardware/arduino/cores/arduino␊
CC=/usr/bin/avr-gcc␊
CPP=/usr/bin/avr-g++␊
AVR_OBJCOPY=/usr/bin/avr-objcopy ␊
AVRDUDE=/usr/bin/avrdude␊
AVRDUDE_CONF=/etc/avrdude.conf␊
CC_FLAGS=-g -Os -w -Wall -ffunction-sections -fdata-sections -fno-exceptions -std=gnu99␊
CPP_FLAGS=-g -Os -w -Wall -ffunction-sections -fdata-sections -fno-exceptions␊
␊
all:␉␉clean compile upload␊
␊
clean:␊
␉␉@echo '# *** Cleaning...'␊
␉␉rm -rf bin/␊
␊
compile:␊
␉␉@echo '# *** Compiling...'␊
␊
␉␉mkdir -p bin␊
␊
␉␉for cpp_file in ${CPP_FILES}; do \␊
␉␉␉$(CPP) -c -mmcu=$(MCU) -DF_CPU=$(DF_CPU) $(INCLUDE) \␊
␉␉␉$(CPP_FLAGS) $$cpp_file.cpp -o bin/$$cpp_file.o; \␊
␉␉done␊
␉␉␊
␉␉for core_c_file in ${CORE_C_FILES}; do \␊
␉␉␉$(CC) -c -mmcu=$(MCU) -DF_CPU=$(DF_CPU) $(INCLUDE) \␊
␉␉␉$(CC_FLAGS) $(ARDUINO_CORE)/$$core_c_file.c \␊
␉␉␉-o bin/$$core_c_file.o; \␊
␉␉done␊
␊
␉␉for core_cpp_file in ${CORE_CPP_FILES}; do \␊
␉␉␉$(CPP) -c -mmcu=$(MCU) -DF_CPU=$(DF_CPU) $(INCLUDE) \␊
␉␉␉$(CPP_FLAGS) $(ARDUINO_CORE)/$$core_cpp_file.cpp \␊
␉␉␉-o bin/$$core_cpp_file.o; \␊
␉␉done␊
␊
␉␉$(CC) -mmcu=$(MCU) -lm -Wl,--gc-sections -Os \␊
␉␉␉-o bin/project.elf bin/*.o␊
␉␉$(AVR_OBJCOPY) -O ihex -R .eeprom \␊
␉␉␉bin/project.elf \␊
␉␉␉bin/project.hex␊
␉␉@echo '# *** Compilation complete'␊
␊
reset:␊
␉␉@echo '# *** Resetting...'␊
␉␉stty --file $(PORT) hupcl␊
␉␉sleep 0.1␊
␉␉stty --file $(PORT) -hupcl␊
␉␉␊
upload:␊
␉␉@echo '# *** Uploading...'␊
␉␉$(AVRDUDE) -q -V -p $(MCU) -C $(AVRDUDE_CONF) -c $(BOARD_TYPE) \␊
␉␉␉-b $(BAUD_RATE) -P $(PORT) \␊
␉␉␉-U flash:w:bin/project.hex:i␊
␉␉@echo '# *** Upload complete'␊
␊
arduino/dht11.cpp
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//␊
// FILE: dht11.cpp␊
// VERSION: 0.4.0␊
// PURPOSE: DHT11 Temperature & Humidity Sensor library for Arduino␊
// LICENSE: GPL v3 (http://www.gnu.org/licenses/gpl.html)␊
//␊
// DATASHEET: http://www.micro4you.com/files/sensor/DHT11.pdf␊
//␊
// HISTORY:␊
// George Hadjikyriacou - Original version (??)␊
// Mod by SimKard - Version 0.2 (24/11/2010)␊
// Mod by Rob Tillaart - Version 0.3 (28/03/2011)␊
// + added comments␊
// + removed all non DHT11 specific code␊
// + added references␊
// Mod by Rob Tillaart - Version 0.4 (17/03/2012)␊
// + added 1.0 support␊
//␊
␊
#include "dht11.h"␊
␊
// returnvalues:␊
// 0 : OK␊
// -1 : checksum error␊
// -2 : timeout␊
int dht11::read(int pin)␊
{␊
␉// BUFFER TO RECEIVE␊
␉uint8_t bits[5];␊
␉uint8_t cnt = 7;␊
␉uint8_t idx = 0;␊
␊
␉// EMPTY BUFFER␊
␉for (int i=0; i< 5; i++) bits[i] = 0;␊
␊
␉// REQUEST SAMPLE␊
␉pinMode(pin, OUTPUT);␊
␉digitalWrite(pin, LOW);␊
␉delay(18);␊
␉digitalWrite(pin, HIGH);␊
␉delayMicroseconds(40);␊
␉pinMode(pin, INPUT);␊
␊
␉// ACKNOWLEDGE or TIMEOUT␊
␉unsigned int loopCnt = 10000;␊
␉while(digitalRead(pin) == LOW)␊
␉␉if (loopCnt-- == 0) return -2;␊
␊
␉loopCnt = 10000;␊
␉while(digitalRead(pin) == HIGH)␊
␉␉if (loopCnt-- == 0) return -2;␊
␊
␉// READ OUTPUT - 40 BITS => 5 BYTES or TIMEOUT␊
␉for (int i=0; i<40; i++)␊
␉{␊
␉␉loopCnt = 10000;␊
␉␉while(digitalRead(pin) == LOW)␊
␉␉␉if (loopCnt-- == 0) return -2;␊
␊
␉␉unsigned long t = micros();␊
␊
␉␉loopCnt = 10000;␊
␉␉while(digitalRead(pin) == HIGH)␊
␉␉␉if (loopCnt-- == 0) return -2;␊
␊
␉␉if ((micros() - t) > 40) bits[idx] |= (1 << cnt);␊
␉␉if (cnt == 0) // next byte?␊
␉␉{␊
␉␉␉cnt = 7; // restart at MSB␊
␉␉␉idx++; // next byte!␊
␉␉}␊
␉␉else cnt--;␊
␉}␊
␊
␉// WRITE TO RIGHT VARS␊
// as bits[1] and bits[3] are allways zero they are omitted in formulas.␊
␉humidity = bits[0]; ␊
␉temperature = bits[2]; ␊
␊
␉uint8_t sum = bits[0] + bits[2]; ␊
␊
␉if (bits[4] != sum) return -1;␊
␉return 0;␊
}␊
//␊
// END OF FILE␊
//
arduino/dht11.h
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// ␊
// FILE: dht11.h␊
// VERSION: 0.4.0␊
// PURPOSE: DHT11 Temperature & Humidity Sensor library for Arduino␊
// LICENSE: GPL v3 (http://www.gnu.org/licenses/gpl.html)␊
//␊
// DATASHEET: http://www.micro4you.com/files/sensor/DHT11.pdf␊
//␊
// URL: http://arduino.cc/playground/Main/DHT11Lib␊
//␊
// HISTORY:␊
// George Hadjikyriacou - Original version␊
// see dht.cpp file␊
// ␊
␊
#ifndef dht11_h␊
#define dht11_h␊
␊
#if defined(ARDUINO) && (ARDUINO >= 100)␊
#include <Arduino.h>␊
#else␊
#include <WProgram.h>␊
#endif␊
␊
#define DHT11LIB_VERSION "0.4.0"␊
␊
class dht11␊
{␊
public:␊
int read(int pin);␊
␉int humidity;␊
␉int temperature;␊
};␊
#endif␊
//␊
// END OF FILE␊
//
arduino/greenhouse.cpp
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#include <WProgram.h>␊
#include <avr/sleep.h>␊
#include <avr/wdt.h>␊
#include <avr/io.h>␊
#include <dht11.h>␊
␊
dht11 DHT11;␊
#define DHT11PIN 3␊
␊
void setup()␊
{␊
␊
// By default, all pins (leaving TX/RX alone) set to inputs with␊
// pullups enabled, to ensure no unwanted power usage.␊
DDRD &= B00000011;␊
DDRB = B00000000;␊
PORTD |= B11111100;␊
PORTB |= B11111111;␊
␊
// Not using the ADC, so disable to save power.␊
ADCSRA = 0;␊
PRR = 1;␊
␊
Serial.begin(9600);␊
Serial.println("Ciaran's Greenhouse");␊
Serial.println();␊
}␊
␊
// watchdog interrupt␊
ISR (WDT_vect) ␊
{␊
wdt_disable();␊
}␊
␊
// Sleep the device for 8 seconds...␊
void sleep8secs()␊
{␊
MCUSR = 0; ␊
WDTCSR = _BV(WDCE) | _BV(WDE);␊
WDTCSR = _BV(WDIE) | _BV(WDP3) | _BV(WDP0);␊
wdt_reset();␉ ␊
set_sleep_mode(SLEEP_MODE_PWR_DOWN); ␊
sleep_enable();␊
MCUCR = _BV(BODS) | _BV(BODSE);␊
MCUCR = _BV(BODS); ␊
sleep_cpu();␊
sleep_disable();␊
}␊
␊
void loop()␊
{␊
int chk = DHT11.read(DHT11PIN);␊
␊
switch (chk)␊
{␊
case 0:␊
Serial.print("Humidity (%): ");␊
Serial.println((float)DHT11.humidity, 2);␊
Serial.print("Temperature (oC): ");␊
Serial.println((float)DHT11.temperature, 2);␊
break;␊
case -1: ␊
Serial.println("Checksum error");␊
break;␊
case -2:␊
Serial.println("Time out error");␊
break;␊
default:␊
Serial.println("Unknown error");␊
break;␊
}␊
␊
// Go to sleep.␊
for(int i=0;i<2;i++)␊
␉ sleep8secs();␊
␊
}␊
␊
␊
␊
arduino/greenhouse.pde
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#include <dht11.h>␊
␊
dht11 DHT11;␊
#define DHT11PIN 3␊
␊
void setup()␊
{␊
Serial.begin(9600);␊
Serial.println("Ciaran's Greenhouse");␊
Serial.println();␊
}␊
␊
void loop()␊
{␊
Serial.println("\n");␊
␊
int chk = DHT11.read(DHT11PIN);␊
␊
switch (chk)␊
{␊
case 0:␊
Serial.print("Humidity (%): ");␊
Serial.println((float)DHT11.humidity, 2);␊
Serial.print("Temperature (oC): ");␊
Serial.println((float)DHT11.temperature, 2);␊
break;␊
case -1: ␊
Serial.println("Checksum error");␊
break;␊
case -2:␊
Serial.println("Time out error");␊
break;␊
default:␊
Serial.println("Unknown error");␊
break;␊
}␊
␊
delay(10000);␊
}␊
␊
␊
␊

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