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add dallas ds1820 external sensor

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This commit is contained in:
Harald Pichler 2015-11-29 22:31:59 +01:00
parent 67ed80e9fe
commit ba9d4ed578
8 changed files with 1823 additions and 4 deletions
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618
examples/osd/arduino-climate3/DallasTemperature.cpp Normal file
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// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
#include "DallasTemperature.h"
extern "C" {
#include "Arduino.h"
}
DallasTemperature::DallasTemperature(OneWire* _oneWire)
#if REQUIRESALARMS
: _AlarmHandler(&defaultAlarmHandler)
#endif
{
_wire = _oneWire;
devices = 0;
parasite = false;
conversionDelay = TEMP_9_BIT;
}
// initialize the bus
void DallasTemperature::begin(void)
{
DeviceAddress deviceAddress;
_wire->reset_search();
devices = 0; // Reset the number of devices when we enumerate wire devices
while (_wire->search(deviceAddress))
{
if (validAddress(deviceAddress))
{
if (!parasite && readPowerSupply(deviceAddress)) parasite = true;
ScratchPad scratchPad;
readScratchPad(deviceAddress, scratchPad);
if (deviceAddress[0] == DS18S20MODEL) conversionDelay = TEMP_12_BIT; // 750 ms
else if (scratchPad[CONFIGURATION] > conversionDelay) conversionDelay = scratchPad[CONFIGURATION];
devices++;
}
}
}
// returns the number of devices found on the bus
uint8_t DallasTemperature::getDeviceCount(void)
{
return devices;
}
// returns true if address is valid
bool DallasTemperature::validAddress(uint8_t* deviceAddress)
{
return (_wire->crc8(deviceAddress, 7) == deviceAddress[7]);
}
// finds an address at a given index on the bus
// returns true if the device was found
bool DallasTemperature::getAddress(uint8_t* deviceAddress, uint8_t index)
{
uint8_t depth = 0;
_wire->reset_search();
while (depth <= index && _wire->search(deviceAddress))
{
if (depth == index && validAddress(deviceAddress)) return true;
depth++;
}
return false;
}
// attempt to determine if the device at the given address is connected to the bus
bool DallasTemperature::isConnected(uint8_t* deviceAddress)
{
ScratchPad scratchPad;
return isConnected(deviceAddress, scratchPad);
}
// attempt to determine if the device at the given address is connected to the bus
// also allows for updating the read scratchpad
bool DallasTemperature::isConnected(uint8_t* deviceAddress, uint8_t* scratchPad)
{
readScratchPad(deviceAddress, scratchPad);
return (_wire->crc8(scratchPad, 8) == scratchPad[SCRATCHPAD_CRC]);
}
// read device's scratch pad
void DallasTemperature::readScratchPad(uint8_t* deviceAddress, uint8_t* scratchPad)
{
// send the command
_wire->reset();
_wire->select(deviceAddress);
_wire->write(READSCRATCH);
// read the response
// byte 0: temperature LSB
scratchPad[TEMP_LSB] = _wire->read();
// byte 1: temperature MSB
scratchPad[TEMP_MSB] = _wire->read();
// byte 2: high alarm temp
scratchPad[HIGH_ALARM_TEMP] = _wire->read();
// byte 3: low alarm temp
scratchPad[LOW_ALARM_TEMP] = _wire->read();
// byte 4:
// DS18S20: store for crc
// DS18B20 & DS1822: configuration register
scratchPad[CONFIGURATION] = _wire->read();
// byte 5:
// internal use & crc
scratchPad[INTERNAL_BYTE] = _wire->read();
// byte 6:
// DS18S20: COUNT_REMAIN
// DS18B20 & DS1822: store for crc
scratchPad[COUNT_REMAIN] = _wire->read();
// byte 7:
// DS18S20: COUNT_PER_C
// DS18B20 & DS1822: store for crc
scratchPad[COUNT_PER_C] = _wire->read();
// byte 8:
// SCTRACHPAD_CRC
scratchPad[SCRATCHPAD_CRC] = _wire->read();
_wire->reset();
}
// writes device's scratch pad
void DallasTemperature::writeScratchPad(uint8_t* deviceAddress, const uint8_t* scratchPad)
{
_wire->reset();
_wire->select(deviceAddress);
_wire->write(WRITESCRATCH);
_wire->write(scratchPad[HIGH_ALARM_TEMP]); // high alarm temp
_wire->write(scratchPad[LOW_ALARM_TEMP]); // low alarm temp
// DS18S20 does not use the configuration register
if (deviceAddress[0] != DS18S20MODEL) _wire->write(scratchPad[CONFIGURATION]); // configuration
_wire->reset();
// save the newly written values to eeprom
_wire->write(COPYSCRATCH, parasite);
if (parasite) delay(10); // 10ms delay
_wire->reset();
}
// reads the device's power requirements
bool DallasTemperature::readPowerSupply(uint8_t* deviceAddress)
{
bool ret = false;
_wire->reset();
_wire->select(deviceAddress);
_wire->write(READPOWERSUPPLY);
if (_wire->read_bit() == 0) ret = true;
_wire->reset();
return ret;
}
// returns the current resolution, 9-12
uint8_t DallasTemperature::getResolution(uint8_t* deviceAddress)
{
if (deviceAddress[0] == DS18S20MODEL) return 9; // this model has a fixed resolution
ScratchPad scratchPad;
readScratchPad(deviceAddress, scratchPad);
switch (scratchPad[CONFIGURATION])
{
case TEMP_12_BIT:
return 12;
break;
case TEMP_11_BIT:
return 11;
break;
case TEMP_10_BIT:
return 10;
break;
case TEMP_9_BIT:
return 9;
break;
}
}
// set resolution of a device to 9, 10, 11, or 12 bits
void DallasTemperature::setResolution(uint8_t* deviceAddress, uint8_t newResolution)
{
ScratchPad scratchPad;
if (isConnected(deviceAddress, scratchPad))
{
// DS18S20 has a fixed 9-bit resolution
if (deviceAddress[0] != DS18S20MODEL)
{
switch (newResolution)
{
case 12:
scratchPad[CONFIGURATION] = TEMP_12_BIT;
break;
case 11:
scratchPad[CONFIGURATION] = TEMP_11_BIT;
break;
case 10:
scratchPad[CONFIGURATION] = TEMP_10_BIT;
break;
case 9:
default:
scratchPad[CONFIGURATION] = TEMP_9_BIT;
break;
}
writeScratchPad(deviceAddress, scratchPad);
}
}
}
// sends command for all devices on the bus to perform a temperature
void DallasTemperature::requestTemperatures(void)
{
_wire->reset();
_wire->skip();
_wire->write(STARTCONVO, parasite);
switch (conversionDelay)
{
case TEMP_9_BIT:
delay(94);
break;
case TEMP_10_BIT:
delay(188);
break;
case TEMP_11_BIT:
delay(375);
break;
case TEMP_12_BIT:
default:
delay(750);
break;
}
}
// sends command for one device to perform a temperature by address
void DallasTemperature::requestTemperaturesByAddress(uint8_t* deviceAddress)
{
_wire->reset();
_wire->select(deviceAddress);
_wire->write(STARTCONVO, parasite);
switch (conversionDelay)
{
case TEMP_9_BIT:
delay(94);
break;
case TEMP_10_BIT:
delay(188);
break;
case TEMP_11_BIT:
delay(375);
break;
case TEMP_12_BIT:
default:
delay(750);
break;
}
}
// sends command for one device to perform a temp conversion by index
void DallasTemperature::requestTemperaturesByIndex(uint8_t deviceIndex)
{
DeviceAddress deviceAddress;
getAddress(deviceAddress, deviceIndex);
requestTemperaturesByAddress(deviceAddress);
}
// Fetch temperature for device index
float DallasTemperature::getTempCByIndex(uint8_t deviceIndex)
{
DeviceAddress deviceAddress;
getAddress(deviceAddress, deviceIndex);
return getTempC((uint8_t*)deviceAddress);
}
// Fetch temperature for device index
float DallasTemperature::getTempFByIndex(uint8_t deviceIndex)
{
return DallasTemperature::toFahrenheit(getTempCByIndex(deviceIndex));
}
// reads scratchpad and returns the temperature in degrees C
float DallasTemperature::calculateTemperature(uint8_t* deviceAddress, uint8_t* scratchPad)
{
int16_t rawTemperature = (((int16_t)scratchPad[TEMP_MSB]) << 8) | scratchPad[TEMP_LSB];
switch (deviceAddress[0])
{
case DS18B20MODEL:
case DS1822MODEL:
switch (scratchPad[CONFIGURATION])
{
case TEMP_12_BIT:
return (float)rawTemperature * 0.0625;
break;
case TEMP_11_BIT:
return (float)(rawTemperature >> 1) * 0.125;
break;
case TEMP_10_BIT:
return (float)(rawTemperature >> 2) * 0.25;
break;
case TEMP_9_BIT:
return (float)(rawTemperature >> 3) * 0.5;
break;
}
break;
case DS18S20MODEL:
/*
Resolutions greater than 9 bits can be calculated using the data from
the temperature, COUNT REMAIN and COUNT PER °C registers in the
scratchpad. Note that the COUNT PER °C register is hard-wired to 16
(10h). After reading the scratchpad, the TEMP_READ value is obtained
by truncating the 0.5°C bit (bit 0) from the temperature data. The
extended resolution temperature can then be calculated using the
following equation:
COUNT_PER_C - COUNT_REMAIN
TEMPERATURE = TEMP_READ - 0.25 + --------------------------
COUNT_PER_C
*/
// Good spot. Thanks Nic Johns for your contribution
return (float)(rawTemperature >> 1) - 0.25 +((float)(scratchPad[COUNT_PER_C] - scratchPad[COUNT_REMAIN]) / (float)scratchPad[COUNT_PER_C] );
break;
}
}
// returns temperature in degrees C or DEVICE_DISCONNECTED if the
// device's scratch pad cannot be read successfully.
// the numeric value of DEVICE_DISCONNECTED is defined in
// DallasTemperature.h. it is a large negative number outside the
// operating range of the device
float DallasTemperature::getTempC(uint8_t* deviceAddress)
{
// TODO: Multiple devices (up to 64) on the same bus may take some time to negotiate a response
// What happens in case of collision?
ScratchPad scratchPad;
if (isConnected(deviceAddress, scratchPad)) return calculateTemperature(deviceAddress, scratchPad);
return DEVICE_DISCONNECTED;
}
// returns temperature in degrees F
float DallasTemperature::getTempF(uint8_t* deviceAddress)
{
return toFahrenheit(getTempC(deviceAddress));
}
// returns true if the bus requires parasite power
bool DallasTemperature::isParasitePowerMode(void)
{
return parasite;
}
#if REQUIRESALARMS
/*
ALARMS:
TH and TL Register Format
BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0
S 2^6 2^5 2^4 2^3 2^2 2^1 2^0
Only bits 11 through 4 of the temperature register are used
in the TH and TL comparison since TH and TL are 8-bit
registers. If the measured temperature is lower than or equal
to TL or higher than or equal to TH, an alarm condition exists
and an alarm flag is set inside the DS18B20. This flag is
updated after every temperature measurement; therefore, if the
alarm condition goes away, the flag will be turned off after
the next temperature conversion.
*/
// sets the high alarm temperature for a device in degrees celsius
// accepts a float, but the alarm resolution will ignore anything
// after a decimal point. valid range is -55C - 125C
void DallasTemperature::setHighAlarmTemp(uint8_t* deviceAddress, char celsius)
{
// make sure the alarm temperature is within the device's range
if (celsius > 125) celsius = 125;
else if (celsius < -55) celsius = -55;
ScratchPad scratchPad;
if (isConnected(deviceAddress, scratchPad))
{
scratchPad[HIGH_ALARM_TEMP] = (uint8_t)celsius;
writeScratchPad(deviceAddress, scratchPad);
}
}
// sets the low alarm temperature for a device in degreed celsius
// accepts a float, but the alarm resolution will ignore anything
// after a decimal point. valid range is -55C - 125C
void DallasTemperature::setLowAlarmTemp(uint8_t* deviceAddress, char celsius)
{
// make sure the alarm temperature is within the device's range
if (celsius > 125) celsius = 125;
else if (celsius < -55) celsius = -55;
ScratchPad scratchPad;
if (isConnected(deviceAddress, scratchPad))
{
scratchPad[LOW_ALARM_TEMP] = (uint8_t)celsius;
writeScratchPad(deviceAddress, scratchPad);
}
}
// returns a char with the current high alarm temperature or
// DEVICE_DISCONNECTED for an address
char DallasTemperature::getHighAlarmTemp(uint8_t* deviceAddress)
{
ScratchPad scratchPad;
if (isConnected(deviceAddress, scratchPad)) return (char)scratchPad[HIGH_ALARM_TEMP];
return DEVICE_DISCONNECTED;
}
// returns a char with the current low alarm temperature or
// DEVICE_DISCONNECTED for an address
char DallasTemperature::getLowAlarmTemp(uint8_t* deviceAddress)
{
ScratchPad scratchPad;
if (isConnected(deviceAddress, scratchPad)) return (char)scratchPad[LOW_ALARM_TEMP];
return DEVICE_DISCONNECTED;
}
// resets internal variables used for the alarm search
void DallasTemperature::resetAlarmSearch()
{
alarmSearchJunction = -1;
alarmSearchExhausted = 0;
for(uint8_t i = 0; i < 7; i++)
alarmSearchAddress[i] = 0;
}
// This is a modified version of the OneWire::search method.
//
// Also added the OneWire search fix documented here:
// http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1238032295
//
// Perform an alarm search. If this function returns a '1' then it has
// enumerated the next device and you may retrieve the ROM from the
// OneWire::address variable. If there are no devices, no further
// devices, or something horrible happens in the middle of the
// enumeration then a 0 is returned. If a new device is found then
// its address is copied to newAddr. Use
// DallasTemperature::resetAlarmSearch() to start over.
bool DallasTemperature::alarmSearch(uint8_t* newAddr)
{
uint8_t i;
char lastJunction = -1;
uint8_t done = 1;
if (alarmSearchExhausted) return false;
if (!_wire->reset()) return false;
// send the alarm search command
_wire->write(0xEC, 0);
for(i = 0; i < 64; i++)
{
uint8_t a = _wire->read_bit( );
uint8_t nota = _wire->read_bit( );
uint8_t ibyte = i / 8;
uint8_t ibit = 1 << (i & 7);
// I don't think this should happen, this means nothing responded, but maybe if
// something vanishes during the search it will come up.
if (a && nota) return false;
if (!a && !nota)
{
if (i == alarmSearchJunction)
{
// this is our time to decide differently, we went zero last time, go one.
a = 1;
alarmSearchJunction = lastJunction;
}
else if (i < alarmSearchJunction)
{
// take whatever we took last time, look in address
if (alarmSearchAddress[ibyte] & ibit) a = 1;
else
{
// Only 0s count as pending junctions, we've already exhasuted the 0 side of 1s
a = 0;
done = 0;
lastJunction = i;
}
}
else
{
// we are blazing new tree, take the 0
a = 0;
alarmSearchJunction = i;
done = 0;
}
// OneWire search fix
// See: http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1238032295
}
if (a) alarmSearchAddress[ibyte] |= ibit;
else alarmSearchAddress[ibyte] &= ~ibit;
_wire->write_bit(a);
}
if (done) alarmSearchExhausted = 1;
for (i = 0; i < 8; i++) newAddr[i] = alarmSearchAddress[i];
return true;
}
// returns true if device address has an alarm condition
bool DallasTemperature::hasAlarm(uint8_t* deviceAddress)
{
ScratchPad scratchPad;
if (isConnected(deviceAddress, scratchPad))
{
float temp = calculateTemperature(deviceAddress, scratchPad);
// check low alarm
if ((char)temp <= (char)scratchPad[LOW_ALARM_TEMP]) return true;
// check high alarm
if ((char)temp >= (char)scratchPad[HIGH_ALARM_TEMP]) return true;
}
// no alarm
return false;
}
// returns true if any device is reporting an alarm condition on the bus
bool DallasTemperature::hasAlarm(void)
{
DeviceAddress deviceAddress;
resetAlarmSearch();
return alarmSearch(deviceAddress);
}
// runs the alarm handler for all devices returned by alarmSearch()
void DallasTemperature::processAlarms(void)
{
resetAlarmSearch();
DeviceAddress alarmAddr;
while (alarmSearch(alarmAddr))
{
if (validAddress(alarmAddr))
_AlarmHandler(alarmAddr);
}
}
// sets the alarm handler
void DallasTemperature::setAlarmHandler(AlarmHandler *handler)
{
_AlarmHandler = handler;
}
// The default alarm handler
void DallasTemperature::defaultAlarmHandler(uint8_t* deviceAddress)
{
}
#endif
// Convert float celsius to fahrenheit
float DallasTemperature::toFahrenheit(float celsius)
{
return (celsius * 1.8) + 32;
}
// Convert float fahrenheit to celsius
float DallasTemperature::toCelsius(float fahrenheit)
{
return (fahrenheit - 32) / 1.8;
}
#if REQUIRESNEW
// MnetCS - Allocates memory for DallasTemperature. Allows us to instance a new object
void* DallasTemperature::operator new(unsigned int size) // Implicit NSS obj size
{
void * p; // void pointer
p = malloc(size); // Allocate memory
memset((DallasTemperature*)p,0,size); // Initalise memory
//!!! CANT EXPLICITLY CALL CONSTRUCTOR - workaround by using an init() methodR - workaround by using an init() method
return (DallasTemperature*) p; // Cast blank region to NSS pointer
}
// MnetCS 2009 - Unallocates the memory used by this instance
void DallasTemperature::operator delete(void* p)
{
DallasTemperature* pNss = (DallasTemperature*) p; // Cast to NSS pointer
pNss->~DallasTemperature(); // Destruct the object
free(p); // Free the memory
}
#endif

213
examples/osd/arduino-climate3/DallasTemperature.h Normal file
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#ifndef DallasTemperature_h
#define DallasTemperature_h
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
// set to true to include code for new and delete operators
#ifndef REQUIRESNEW
#define REQUIRESNEW false
#endif
// set to true to include code implementing alarm search functions
#ifndef REQUIRESALARMS
#define REQUIRESALARMS true
#endif
#include <inttypes.h>
#include <OneWire.h>
// Model IDs
#define DS18S20MODEL 0x10
#define DS18B20MODEL 0x28
#define DS1822MODEL 0x22
// OneWire commands
#define STARTCONVO 0x44 // Tells device to take a temperature reading and put it on the scratchpad
#define COPYSCRATCH 0x48 // Copy EEPROM
#define READSCRATCH 0xBE // Read EEPROM
#define WRITESCRATCH 0x4E // Write to EEPROM
#define RECALLSCRATCH 0xB8 // Reload from last known
#define READPOWERSUPPLY 0xB4 // Determine if device needs parasite power
#define ALARMSEARCH 0xEC // Query bus for devices with an alarm condition
// Scratchpad locations
#define TEMP_LSB 0
#define TEMP_MSB 1
#define HIGH_ALARM_TEMP 2
#define LOW_ALARM_TEMP 3
#define CONFIGURATION 4
#define INTERNAL_BYTE 5
#define COUNT_REMAIN 6
#define COUNT_PER_C 7
#define SCRATCHPAD_CRC 8
// Device resolution
#define TEMP_9_BIT 0x1F // 9 bit
#define TEMP_10_BIT 0x3F // 10 bit
#define TEMP_11_BIT 0x5F // 11 bit
#define TEMP_12_BIT 0x7F // 12 bit
// Error Codes
#define DEVICE_DISCONNECTED -127
typedef uint8_t DeviceAddress[8];
class DallasTemperature
{
public:
DallasTemperature(OneWire*);
// initalize bus
void begin(void);
// returns the number of devices found on the bus
uint8_t getDeviceCount(void);
// returns true if address is valid
bool validAddress(uint8_t*);
// finds an address at a given index on the bus
bool getAddress(uint8_t*, const uint8_t);
// attempt to determine if the device at the given address is connected to the bus
bool isConnected(uint8_t*);
// attempt to determine if the device at the given address is connected to the bus
// also allows for updating the read scratchpad
bool isConnected(uint8_t*, uint8_t*);
// read device's scratchpad
void readScratchPad(uint8_t*, uint8_t*);
// write device's scratchpad
void writeScratchPad(uint8_t*, const uint8_t*);
// read device's power requirements
bool readPowerSupply(uint8_t*);
// returns the current resolution, 9-12
uint8_t getResolution(uint8_t*);
// set resolution of a device to 9, 10, 11, or 12 bits
void setResolution(uint8_t*, uint8_t);
// sends command for all devices on the bus to perform a temperature conversion
void requestTemperatures(void);
// sends command for one device to perform a temperature conversion by address
void requestTemperaturesByAddress(uint8_t*);
// sends command for one device to perform a temperature conversion by index
void requestTemperaturesByIndex(uint8_t);
// returns temperature in degrees C
float getTempC(uint8_t*);
// returns temperature in degrees F
float getTempF(uint8_t*);
// Get temperature for device index (slow)
float getTempCByIndex(uint8_t);
// Get temperature for device index (slow)
float getTempFByIndex(uint8_t);
// returns true if the bus requires parasite power
bool isParasitePowerMode(void);
#if REQUIRESALARMS
typedef void AlarmHandler(uint8_t*);
// sets the high alarm temperature for a device
// accepts a char. valid range is -55C - 125C
void setHighAlarmTemp(uint8_t*, const char);
// sets the low alarm temperature for a device
// accepts a char. valid range is -55C - 125C
void setLowAlarmTemp(uint8_t*, const char);
// returns a signed char with the current high alarm temperature for a device
// in the range -55C - 125C
char getHighAlarmTemp(uint8_t*);
// returns a signed char with the current low alarm temperature for a device
// in the range -55C - 125C
char getLowAlarmTemp(uint8_t*);
// resets internal variables used for the alarm search
void resetAlarmSearch(void);
// search the wire for devices with active alarms
bool alarmSearch(uint8_t*);
// returns true if ia specific device has an alarm
bool hasAlarm(uint8_t*);
// returns true if any device is reporting an alarm on the bus
bool hasAlarm(void);
// runs the alarm handler for all devices returned by alarmSearch()
void processAlarms(void);
// sets the alarm handler
void setAlarmHandler(AlarmHandler *);
// The default alarm handler
static void defaultAlarmHandler(uint8_t*);
#endif
// convert from celcius to farenheit
static float toFahrenheit(const float);
// convert from farenheit to celsius
static float toCelsius(const float);
#if REQUIRESNEW
// initalize memory area
void* operator new (unsigned int);
// delete memory reference
void operator delete(void*);
#endif
private:
typedef uint8_t ScratchPad[9];
// parasite power on or off
bool parasite;
// used to determine the delay amount needed to allow for the
// temperature conversion to take place
int conversionDelay;
// count of devices on the bus
uint8_t devices;
// Take a pointer to one wire instance
OneWire* _wire;
// reads scratchpad and returns the temperature in degrees C
float calculateTemperature(uint8_t*, uint8_t*);
#if REQUIRESALARMS
// required for alarmSearch
uint8_t alarmSearchAddress[8];
char alarmSearchJunction;
uint8_t alarmSearchExhausted;
// the alarm handler function pointer
AlarmHandler *_AlarmHandler;
#endif
};
#endif

2
examples/osd/arduino-climate3/Makefile
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@ -16,7 +16,7 @@ CONTIKI_WITH_IPV6 = 1
CFLAGS += -DPROJECT_CONF_H=\"project-conf.h\" CFLAGS += -DPROJECT_CONF_H=\"project-conf.h\"
LFLAGS += -lm LFLAGS += -lm
PROJECT_SOURCEFILES += ${SKETCH}.cpp Adafruit_HTU21DF.cpp Wire.cpp twi.c new.cpp WString.cpp Stream.cpp PROJECT_SOURCEFILES += ${SKETCH}.cpp Adafruit_HTU21DF.cpp Wire.cpp twi.c new.cpp WString.cpp Stream.cpp OneWire.cpp DallasTemperature.cpp
# automatically build RESTful resources # automatically build RESTful resources
REST_RESOURCES_DIR = ./resources REST_RESOURCES_DIR = ./resources

563
examples/osd/arduino-climate3/OneWire.cpp Normal file
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@ -0,0 +1,563 @@
/*
Copyright (c) 2007, Jim Studt (original old version - many contributors since)
The latest version of this library may be found at:
http://www.pjrc.com/teensy/td_libs_OneWire.html
OneWire has been maintained by Paul Stoffregen (paul@pjrc.com) since
January 2010. At the time, it was in need of many bug fixes, but had
been abandoned the original author (Jim Studt). None of the known
contributors were interested in maintaining OneWire. Paul typically
works on OneWire every 6 to 12 months. Patches usually wait that
long. If anyone is interested in more actively maintaining OneWire,
please contact Paul.
Version 2.3:
Unknonw chip fallback mode, Roger Clark
Teensy-LC compatibility, Paul Stoffregen
Search bug fix, Love Nystrom
Version 2.2:
Teensy 3.0 compatibility, Paul Stoffregen, paul@pjrc.com
Arduino Due compatibility, http://arduino.cc/forum/index.php?topic=141030
Fix DS18B20 example negative temperature
Fix DS18B20 example's low res modes, Ken Butcher
Improve reset timing, Mark Tillotson
Add const qualifiers, Bertrik Sikken
Add initial value input to crc16, Bertrik Sikken
Add target_search() function, Scott Roberts
Version 2.1:
Arduino 1.0 compatibility, Paul Stoffregen
Improve temperature example, Paul Stoffregen
DS250x_PROM example, Guillermo Lovato
PIC32 (chipKit) compatibility, Jason Dangel, dangel.jason AT gmail.com
Improvements from Glenn Trewitt:
- crc16() now works
- check_crc16() does all of calculation/checking work.
- Added read_bytes() and write_bytes(), to reduce tedious loops.
- Added ds2408 example.
Delete very old, out-of-date readme file (info is here)
Version 2.0: Modifications by Paul Stoffregen, January 2010:
http://www.pjrc.com/teensy/td_libs_OneWire.html
Search fix from Robin James
http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1238032295/27#27
Use direct optimized I/O in all cases
Disable interrupts during timing critical sections
(this solves many random communication errors)
Disable interrupts during read-modify-write I/O
Reduce RAM consumption by eliminating unnecessary
variables and trimming many to 8 bits
Optimize both crc8 - table version moved to flash
Modified to work with larger numbers of devices - avoids loop.
Tested in Arduino 11 alpha with 12 sensors.
26 Sept 2008 -- Robin James
http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1238032295/27#27
Updated to work with arduino-0008 and to include skip() as of
2007/07/06. --RJL20
Modified to calculate the 8-bit CRC directly, avoiding the need for
the 256-byte lookup table to be loaded in RAM. Tested in arduino-0010
-- Tom Pollard, Jan 23, 2008
Jim Studt's original library was modified by Josh Larios.
Tom Pollard, pollard@alum.mit.edu, contributed around May 20, 2008
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Much of the code was inspired by Derek Yerger's code, though I don't
think much of that remains. In any event that was..
(copyleft) 2006 by Derek Yerger - Free to distribute freely.
The CRC code was excerpted and inspired by the Dallas Semiconductor
sample code bearing this copyright.
//---------------------------------------------------------------------------
// Copyright (C) 2000 Dallas Semiconductor Corporation, All Rights Reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
// IN NO EVENT SHALL DALLAS SEMICONDUCTOR BE LIABLE FOR ANY CLAIM, DAMAGES
// OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
//
// Except as contained in this notice, the name of Dallas Semiconductor
// shall not be used except as stated in the Dallas Semiconductor
// Branding Policy.
//--------------------------------------------------------------------------
*/
#include "OneWire.h"
OneWire::OneWire(uint8_t pin)
{
pinMode(pin, INPUT);
bitmask = PIN_TO_BITMASK(pin);
baseReg = PIN_TO_BASEREG(pin);
#if ONEWIRE_SEARCH
reset_search();
#endif
}
// Perform the onewire reset function. We will wait up to 250uS for
// the bus to come high, if it doesn't then it is broken or shorted
// and we return a 0;
//
// Returns 1 if a device asserted a presence pulse, 0 otherwise.
//
uint8_t OneWire::reset(void)
{
IO_REG_TYPE mask = bitmask;
volatile IO_REG_TYPE *reg IO_REG_ASM = baseReg;
uint8_t r;
uint8_t retries = 125;
noInterrupts();
DIRECT_MODE_INPUT(reg, mask);
interrupts();
// wait until the wire is high... just in case
do {
if (--retries == 0) return 0;
delayMicroseconds(2);
} while ( !DIRECT_READ(reg, mask));
noInterrupts();
DIRECT_WRITE_LOW(reg, mask);
DIRECT_MODE_OUTPUT(reg, mask); // drive output low
interrupts();
delayMicroseconds(480);
noInterrupts();
DIRECT_MODE_INPUT(reg, mask); // allow it to float
delayMicroseconds(70);
r = !DIRECT_READ(reg, mask);
interrupts();
delayMicroseconds(410);
return r;
}
//
// Write a bit. Port and bit is used to cut lookup time and provide
// more certain timing.
//
void OneWire::write_bit(uint8_t v)
{
IO_REG_TYPE mask=bitmask;
volatile IO_REG_TYPE *reg IO_REG_ASM = baseReg;
if (v & 1) {
noInterrupts();
DIRECT_WRITE_LOW(reg, mask);
DIRECT_MODE_OUTPUT(reg, mask); // drive output low
delayMicroseconds(10);
DIRECT_WRITE_HIGH(reg, mask); // drive output high
interrupts();
delayMicroseconds(55);
} else {
noInterrupts();
DIRECT_WRITE_LOW(reg, mask);
DIRECT_MODE_OUTPUT(reg, mask); // drive output low
delayMicroseconds(65);
DIRECT_WRITE_HIGH(reg, mask); // drive output high
interrupts();
delayMicroseconds(5);
}
}
//
// Read a bit. Port and bit is used to cut lookup time and provide
// more certain timing.
//
uint8_t OneWire::read_bit(void)
{
IO_REG_TYPE mask=bitmask;
volatile IO_REG_TYPE *reg IO_REG_ASM = baseReg;
uint8_t r;
noInterrupts();
DIRECT_MODE_OUTPUT(reg, mask);
DIRECT_WRITE_LOW(reg, mask);
delayMicroseconds(3);
DIRECT_MODE_INPUT(reg, mask); // let pin float, pull up will raise
delayMicroseconds(10);
r = DIRECT_READ(reg, mask);
interrupts();
delayMicroseconds(53);
return r;
}
//
// Write a byte. The writing code uses the active drivers to raise the
// pin high, if you need power after the write (e.g. DS18S20 in
// parasite power mode) then set 'power' to 1, otherwise the pin will
// go tri-state at the end of the write to avoid heating in a short or
// other mishap.
//
void OneWire::write(uint8_t v, uint8_t power /* = 0 */) {
uint8_t bitMask;
for (bitMask = 0x01; bitMask; bitMask <<= 1) {
OneWire::write_bit( (bitMask & v)?1:0);
}
if ( !power) {
noInterrupts();
DIRECT_MODE_INPUT(baseReg, bitmask);
DIRECT_WRITE_LOW(baseReg, bitmask);
interrupts();
}
}
void OneWire::write_bytes(const uint8_t *buf, uint16_t count, bool power /* = 0 */) {
for (uint16_t i = 0 ; i < count ; i++)
write(buf[i]);
if (!power) {
noInterrupts();
DIRECT_MODE_INPUT(baseReg, bitmask);
DIRECT_WRITE_LOW(baseReg, bitmask);
interrupts();
}
}
//
// Read a byte
//
uint8_t OneWire::read() {
uint8_t bitMask;
uint8_t r = 0;
for (bitMask = 0x01; bitMask; bitMask <<= 1) {
if ( OneWire::read_bit()) r |= bitMask;
}
return r;
}
void OneWire::read_bytes(uint8_t *buf, uint16_t count) {
for (uint16_t i = 0 ; i < count ; i++)
buf[i] = read();
}
//
// Do a ROM select
//
void OneWire::select(const uint8_t rom[8])
{
uint8_t i;
write(0x55); // Choose ROM
for (i = 0; i < 8; i++) write(rom[i]);
}
//
// Do a ROM skip
//
void OneWire::skip()
{
write(0xCC); // Skip ROM
}
void OneWire::depower()
{
noInterrupts();
DIRECT_MODE_INPUT(baseReg, bitmask);
interrupts();
}
#if ONEWIRE_SEARCH
//
// You need to use this function to start a search again from the beginning.
// You do not need to do it for the first search, though you could.
//
void OneWire::reset_search()
{
// reset the search state
LastDiscrepancy = 0;
LastDeviceFlag = FALSE;
LastFamilyDiscrepancy = 0;
for(int i = 7; ; i--) {
ROM_NO[i] = 0;
if ( i == 0) break;
}
}
// Setup the search to find the device type 'family_code' on the next call
// to search(*newAddr) if it is present.
//
void OneWire::target_search(uint8_t family_code)
{
// set the search state to find SearchFamily type devices
ROM_NO[0] = family_code;
for (uint8_t i = 1; i < 8; i++)
ROM_NO[i] = 0;
LastDiscrepancy = 64;
LastFamilyDiscrepancy = 0;
LastDeviceFlag = FALSE;
}
//
// Perform a search. If this function returns a '1' then it has
// enumerated the next device and you may retrieve the ROM from the
// OneWire::address variable. If there are no devices, no further
// devices, or something horrible happens in the middle of the
// enumeration then a 0 is returned. If a new device is found then
// its address is copied to newAddr. Use OneWire::reset_search() to
// start over.
//
// --- Replaced by the one from the Dallas Semiconductor web site ---
//--------------------------------------------------------------------------
// Perform the 1-Wire Search Algorithm on the 1-Wire bus using the existing
// search state.
// Return TRUE : device found, ROM number in ROM_NO buffer
// FALSE : device not found, end of search
//
uint8_t OneWire::search(uint8_t *newAddr)
{
uint8_t id_bit_number;
uint8_t last_zero, rom_byte_number, search_result;
uint8_t id_bit, cmp_id_bit;
unsigned char rom_byte_mask, search_direction;
// initialize for search
id_bit_number = 1;
last_zero = 0;
rom_byte_number = 0;
rom_byte_mask = 1;
search_result = 0;
// if the last call was not the last one
if (!LastDeviceFlag)
{
// 1-Wire reset
if (!reset())
{
// reset the search
LastDiscrepancy = 0;
LastDeviceFlag = FALSE;
LastFamilyDiscrepancy = 0;
return FALSE;
}
// issue the search command
write(0xF0);
// loop to do the search
do
{
// read a bit and its complement
id_bit = read_bit();
cmp_id_bit = read_bit();
// check for no devices on 1-wire
if ((id_bit == 1) && (cmp_id_bit == 1))
break;
else
{
// all devices coupled have 0 or 1
if (id_bit != cmp_id_bit)
search_direction = id_bit; // bit write value for search
else
{
// if this discrepancy if before the Last Discrepancy
// on a previous next then pick the same as last time
if (id_bit_number < LastDiscrepancy)
search_direction = ((ROM_NO[rom_byte_number] & rom_byte_mask) > 0);
else
// if equal to last pick 1, if not then pick 0
search_direction = (id_bit_number == LastDiscrepancy);
// if 0 was picked then record its position in LastZero
if (search_direction == 0)
{
last_zero = id_bit_number;
// check for Last discrepancy in family
if (last_zero < 9)
LastFamilyDiscrepancy = last_zero;
}
}
// set or clear the bit in the ROM byte rom_byte_number
// with mask rom_byte_mask
if (search_direction == 1)
ROM_NO[rom_byte_number] |= rom_byte_mask;
else
ROM_NO[rom_byte_number] &= ~rom_byte_mask;
// serial number search direction write bit
write_bit(search_direction);
// increment the byte counter id_bit_number
// and shift the mask rom_byte_mask
id_bit_number++;
rom_byte_mask <<= 1;
// if the mask is 0 then go to new SerialNum byte rom_byte_number and reset mask
if (rom_byte_mask == 0)
{
rom_byte_number++;
rom_byte_mask = 1;
}
}
}
while(rom_byte_number < 8); // loop until through all ROM bytes 0-7
// if the search was successful then
if (!(id_bit_number < 65))
{
// search successful so set LastDiscrepancy,LastDeviceFlag,search_result
LastDiscrepancy = last_zero;
// check for last device
if (LastDiscrepancy == 0)
LastDeviceFlag = TRUE;
search_result = TRUE;
}
}
// if no device found then reset counters so next 'search' will be like a first
if (!search_result || !ROM_NO[0])
{
LastDiscrepancy = 0;
LastDeviceFlag = FALSE;
LastFamilyDiscrepancy = 0;
search_result = FALSE;
} else {
for (int i = 0; i < 8; i++) newAddr[i] = ROM_NO[i];
}
return search_result;
}
#endif
#if ONEWIRE_CRC
// The 1-Wire CRC scheme is described in Maxim Application Note 27:
// "Understanding and Using Cyclic Redundancy Checks with Maxim iButton Products"
//
#if ONEWIRE_CRC8_TABLE
// This table comes from Dallas sample code where it is freely reusable,
// though Copyright (C) 2000 Dallas Semiconductor Corporation
static const uint8_t PROGMEM dscrc_table[] = {
0, 94,188,226, 97, 63,221,131,194,156,126, 32,163,253, 31, 65,
157,195, 33,127,252,162, 64, 30, 95, 1,227,189, 62, 96,130,220,
35,125,159,193, 66, 28,254,160,225,191, 93, 3,128,222, 60, 98,
190,224, 2, 92,223,129, 99, 61,124, 34,192,158, 29, 67,161,255,
70, 24,250,164, 39,121,155,197,132,218, 56,102,229,187, 89, 7,
219,133,103, 57,186,228, 6, 88, 25, 71,165,251,120, 38,196,154,
101, 59,217,135, 4, 90,184,230,167,249, 27, 69,198,152,122, 36,
248,166, 68, 26,153,199, 37,123, 58,100,134,216, 91, 5,231,185,
140,210, 48,110,237,179, 81, 15, 78, 16,242,172, 47,113,147,205,
17, 79,173,243,112, 46,204,146,211,141,111, 49,178,236, 14, 80,
175,241, 19, 77,206,144,114, 44,109, 51,209,143, 12, 82,176,238,
50,108,142,208, 83, 13,239,177,240,174, 76, 18,145,207, 45,115,
202,148,118, 40,171,245, 23, 73, 8, 86,180,234,105, 55,213,139,
87, 9,235,181, 54,104,138,212,149,203, 41,119,244,170, 72, 22,
233,183, 85, 11,136,214, 52,106, 43,117,151,201, 74, 20,246,168,
116, 42,200,150, 21, 75,169,247,182,232, 10, 84,215,137,107, 53};
//
// Compute a Dallas Semiconductor 8 bit CRC. These show up in the ROM
// and the registers. (note: this might better be done without to
// table, it would probably be smaller and certainly fast enough
// compared to all those delayMicrosecond() calls. But I got
// confused, so I use this table from the examples.)
//
uint8_t OneWire::crc8(const uint8_t *addr, uint8_t len)
{
uint8_t crc = 0;
while (len--) {
crc = pgm_read_byte(dscrc_table + (crc ^ *addr++));
}
return crc;
}
#else
//
// Compute a Dallas Semiconductor 8 bit CRC directly.
// this is much slower, but much smaller, than the lookup table.
//
uint8_t OneWire::crc8(const uint8_t *addr, uint8_t len)
{
uint8_t crc = 0;
while (len--) {
uint8_t inbyte = *addr++;
for (uint8_t i = 8; i; i--) {
uint8_t mix = (crc ^ inbyte) & 0x01;
crc >>= 1;
if (mix) crc ^= 0x8C;
inbyte >>= 1;
}
}
return crc;
}
#endif
#if ONEWIRE_CRC16
bool OneWire::check_crc16(const uint8_t* input, uint16_t len, const uint8_t* inverted_crc, uint16_t crc)
{
crc = ~crc16(input, len, crc);
return (crc & 0xFF) == inverted_crc[0] && (crc >> 8) == inverted_crc[1];
}
uint16_t OneWire::crc16(const uint8_t* input, uint16_t len, uint16_t crc)
{
static const uint8_t oddparity[16] =
{ 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0 };
for (uint16_t i = 0 ; i < len ; i++) {
// Even though we're just copying a byte from the input,
// we'll be doing 16-bit computation with it.
uint16_t cdata = input[i];
cdata = (cdata ^ crc) & 0xff;
crc >>= 8;
if (oddparity[cdata & 0x0F] ^ oddparity[cdata >> 4])
crc ^= 0xC001;
cdata <<= 6;
crc ^= cdata;
cdata <<= 1;
crc ^= cdata;
}
return crc;
}
#endif
#endif

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examples/osd/arduino-climate3/OneWire.h Normal file
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@ -0,0 +1,250 @@
#ifndef OneWire_h
#define OneWire_h
#include <inttypes.h>
//#if ARDUINO >= 100
#include "Arduino.h" // for delayMicroseconds, digitalPinToBitMask, etc
//#else
//#include "WProgram.h" // for delayMicroseconds
//#include "pins_arduino.h" // for digitalPinToBitMask, etc
//#endif
// You can exclude certain features from OneWire. In theory, this
// might save some space. In practice, the compiler automatically
// removes unused code (technically, the linker, using -fdata-sections
// and -ffunction-sections when compiling, and Wl,--gc-sections
// when linking), so most of these will not result in any code size
// reduction. Well, unless you try to use the missing features
// and redesign your program to not need them! ONEWIRE_CRC8_TABLE
// is the exception, because it selects a fast but large algorithm
// or a small but slow algorithm.
// you can exclude onewire_search by defining that to 0
#ifndef ONEWIRE_SEARCH
#define ONEWIRE_SEARCH 1
#endif
// You can exclude CRC checks altogether by defining this to 0
#ifndef ONEWIRE_CRC
#define ONEWIRE_CRC 1
#endif
// Select the table-lookup method of computing the 8-bit CRC
// by setting this to 1. The lookup table enlarges code size by
// about 250 bytes. It does NOT consume RAM (but did in very
// old versions of OneWire). If you disable this, a slower
// but very compact algorithm is used.
#ifndef ONEWIRE_CRC8_TABLE
#define ONEWIRE_CRC8_TABLE 1
#endif
// You can allow 16-bit CRC checks by defining this to 1
// (Note that ONEWIRE_CRC must also be 1.)
#ifndef ONEWIRE_CRC16
#define ONEWIRE_CRC16 1
#endif
#define FALSE 0
#define TRUE 1
// Platform specific I/O definitions
#if defined(__AVR__)
#define PIN_TO_BASEREG(pin) (portInputRegister(digitalPinToPort(pin)))
#define PIN_TO_BITMASK(pin) (digitalPinToBitMask(pin))
#define IO_REG_TYPE uint8_t
#define IO_REG_ASM asm("r30")
#define DIRECT_READ(base, mask) (((*(base)) & (mask)) ? 1 : 0)
#define DIRECT_MODE_INPUT(base, mask) ((*((base)+1)) &= ~(mask))
#define DIRECT_MODE_OUTPUT(base, mask) ((*((base)+1)) |= (mask))
#define DIRECT_WRITE_LOW(base, mask) ((*((base)+2)) &= ~(mask))
#define DIRECT_WRITE_HIGH(base, mask) ((*((base)+2)) |= (mask))
#elif defined(__MK20DX128__) || defined(__MK20DX256__)
#define PIN_TO_BASEREG(pin) (portOutputRegister(pin))
#define PIN_TO_BITMASK(pin) (1)
#define IO_REG_TYPE uint8_t
#define IO_REG_ASM
#define DIRECT_READ(base, mask) (*((base)+512))
#define DIRECT_MODE_INPUT(base, mask) (*((base)+640) = 0)
#define DIRECT_MODE_OUTPUT(base, mask) (*((base)+640) = 1)
#define DIRECT_WRITE_LOW(base, mask) (*((base)+256) = 1)
#define DIRECT_WRITE_HIGH(base, mask) (*((base)+128) = 1)
#elif defined(__MKL26Z64__)
#define PIN_TO_BASEREG(pin) (portOutputRegister(pin))
#define PIN_TO_BITMASK(pin) (digitalPinToBitMask(pin))
#define IO_REG_TYPE uint8_t
#define IO_REG_ASM
#define DIRECT_READ(base, mask) ((*((base)+16) & (mask)) ? 1 : 0)
#define DIRECT_MODE_INPUT(base, mask) (*((base)+20) &= ~(mask))
#define DIRECT_MODE_OUTPUT(base, mask) (*((base)+20) |= (mask))
#define DIRECT_WRITE_LOW(base, mask) (*((base)+8) = (mask))
#define DIRECT_WRITE_HIGH(base, mask) (*((base)+4) = (mask))
#elif defined(__SAM3X8E__)
// Arduino 1.5.1 may have a bug in delayMicroseconds() on Arduino Due.
// http://arduino.cc/forum/index.php/topic,141030.msg1076268.html#msg1076268
// If you have trouble with OneWire on Arduino Due, please check the
// status of delayMicroseconds() before reporting a bug in OneWire!
#define PIN_TO_BASEREG(pin) (&(digitalPinToPort(pin)->PIO_PER))
#define PIN_TO_BITMASK(pin) (digitalPinToBitMask(pin))
#define IO_REG_TYPE uint32_t
#define IO_REG_ASM
#define DIRECT_READ(base, mask) (((*((base)+15)) & (mask)) ? 1 : 0)
#define DIRECT_MODE_INPUT(base, mask) ((*((base)+5)) = (mask))
#define DIRECT_MODE_OUTPUT(base, mask) ((*((base)+4)) = (mask))
#define DIRECT_WRITE_LOW(base, mask) ((*((base)+13)) = (mask))
#define DIRECT_WRITE_HIGH(base, mask) ((*((base)+12)) = (mask))
#ifndef PROGMEM
#define PROGMEM
#endif
#ifndef pgm_read_byte
#define pgm_read_byte(addr) (*(const uint8_t *)(addr))
#endif
#elif defined(__PIC32MX__)
#define PIN_TO_BASEREG(pin) (portModeRegister(digitalPinToPort(pin)))
#define PIN_TO_BITMASK(pin) (digitalPinToBitMask(pin))
#define IO_REG_TYPE uint32_t
#define IO_REG_ASM
#define DIRECT_READ(base, mask) (((*(base+4)) & (mask)) ? 1 : 0) //PORTX + 0x10
#define DIRECT_MODE_INPUT(base, mask) ((*(base+2)) = (mask)) //TRISXSET + 0x08
#define DIRECT_MODE_OUTPUT(base, mask) ((*(base+1)) = (mask)) //TRISXCLR + 0x04
#define DIRECT_WRITE_LOW(base, mask) ((*(base+8+1)) = (mask)) //LATXCLR + 0x24
#define DIRECT_WRITE_HIGH(base, mask) ((*(base+8+2)) = (mask)) //LATXSET + 0x28
#else
#define PIN_TO_BASEREG(pin) (0)
#define PIN_TO_BITMASK(pin) (pin)
#define IO_REG_TYPE unsigned int
#define IO_REG_ASM
#define DIRECT_READ(base, pin) digitalRead(pin)
#define DIRECT_WRITE_LOW(base, pin) digitalWrite(pin, LOW)
#define DIRECT_WRITE_HIGH(base, pin) digitalWrite(pin, HIGH)
#define DIRECT_MODE_INPUT(base, pin) pinMode(pin,INPUT)
#define DIRECT_MODE_OUTPUT(base, pin) pinMode(pin,OUTPUT)
#warning "OneWire. Fallback mode. Using API calls for pinMode,digitalRead and digitalWrite. Operation of this library is not guaranteed on this architecture."
#endif
class OneWire
{
private:
IO_REG_TYPE bitmask;
volatile IO_REG_TYPE *baseReg;
#if ONEWIRE_SEARCH
// global search state
unsigned char ROM_NO[8];
uint8_t LastDiscrepancy;
uint8_t LastFamilyDiscrepancy;
uint8_t LastDeviceFlag;
#endif
public:
OneWire( uint8_t pin);
// Perform a 1-Wire reset cycle. Returns 1 if a device responds
// with a presence pulse. Returns 0 if there is no device or the
// bus is shorted or otherwise held low for more than 250uS
uint8_t reset(void);
// Issue a 1-Wire rom select command, you do the reset first.
void select(const uint8_t rom[8]);
// Issue a 1-Wire rom skip command, to address all on bus.
void skip(void);
// Write a byte. If 'power' is one then the wire is held high at
// the end for parasitically powered devices. You are responsible
// for eventually depowering it by calling depower() or doing
// another read or write.
void write(uint8_t v, uint8_t power = 0);
void write_bytes(const uint8_t *buf, uint16_t count, bool power = 0);
// Read a byte.
uint8_t read(void);
void read_bytes(uint8_t *buf, uint16_t count);
// Write a bit. The bus is always left powered at the end, see
// note in write() about that.
void write_bit(uint8_t v);
// Read a bit.
uint8_t read_bit(void);
// Stop forcing power onto the bus. You only need to do this if
// you used the 'power' flag to write() or used a write_bit() call
// and aren't about to do another read or write. You would rather
// not leave this powered if you don't have to, just in case
// someone shorts your bus.
void depower(void);
#if ONEWIRE_SEARCH
// Clear the search state so that if will start from the beginning again.
void reset_search();
// Setup the search to find the device type 'family_code' on the next call
// to search(*newAddr) if it is present.
void target_search(uint8_t family_code);
// Look for the next device. Returns 1 if a new address has been
// returned. A zero might mean that the bus is shorted, there are
// no devices, or you have already retrieved all of them. It
// might be a good idea to check the CRC to make sure you didn't
// get garbage. The order is deterministic. You will always get
// the same devices in the same order.
uint8_t search(uint8_t *newAddr);
#endif
#if ONEWIRE_CRC
// Compute a Dallas Semiconductor 8 bit CRC, these are used in the
// ROM and scratchpad registers.
static uint8_t crc8(const uint8_t *addr, uint8_t len);
#if ONEWIRE_CRC16
// Compute the 1-Wire CRC16 and compare it against the received CRC.
// Example usage (reading a DS2408):
// // Put everything in a buffer so we can compute the CRC easily.
// uint8_t buf[13];
// buf[0] = 0xF0; // Read PIO Registers
// buf[1] = 0x88; // LSB address
// buf[2] = 0x00; // MSB address
// WriteBytes(net, buf, 3); // Write 3 cmd bytes
// ReadBytes(net, buf+3, 10); // Read 6 data bytes, 2 0xFF, 2 CRC16
// if (!CheckCRC16(buf, 11, &buf[11])) {
// // Handle error.
// }
//
// @param input - Array of bytes to checksum.
// @param len - How many bytes to use.
// @param inverted_crc - The two CRC16 bytes in the received data.
// This should just point into the received data,
// *not* at a 16-bit integer.
// @param crc - The crc starting value (optional)
// @return True, iff the CRC matches.
static bool check_crc16(const uint8_t* input, uint16_t len, const uint8_t* inverted_crc, uint16_t crc = 0);
// Compute a Dallas Semiconductor 16 bit CRC. This is required to check
// the integrity of data received from many 1-Wire devices. Note that the
// CRC computed here is *not* what you'll get from the 1-Wire network,
// for two reasons:
// 1) The CRC is transmitted bitwise inverted.
// 2) Depending on the endian-ness of your processor, the binary
// representation of the two-byte return value may have a different
// byte order than the two bytes you get from 1-Wire.
// @param input - Array of bytes to checksum.
// @param len - How many bytes to use.
// @param crc - The crc starting value (optional)
// @return The CRC16, as defined by Dallas Semiconductor.
static uint16_t crc16(const uint8_t* input, uint16_t len, uint16_t crc = 0);
#endif
#endif
};
#endif

78
examples/osd/arduino-climate3/resources/res-dtemp1.c Normal file
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@ -0,0 +1,78 @@
/*
* Copyright (c) 2013, Institute for Pervasive Computing, ETH Zurich
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*/
/**
* \file
* Moisture resource
* \author
* Harald Pichler <harald@the-develop.net>
*/
#include "contiki.h"
#include <string.h>
#include "rest-engine.h"
#include "Arduino.h"
#include "sketch.h"
static void res_get_handler(void *request, void *response, uint8_t *buffer, uint16_t preferred_size, int32_t *offset);
/* A simple getter example. Returns the reading from the sensor with a simple etag */
RESOURCE(res_dtemp1,
"title=\"Temperature status\";rt=\"Temperature\"",
res_get_handler,
NULL,
NULL,
NULL);
static void
res_get_handler(void *request, void *response, uint8_t *buffer, uint16_t preferred_size, int32_t *offset)
{
unsigned int accept = -1;
REST.get_header_accept(request, &accept);
if(accept == -1 || accept == REST.type.TEXT_PLAIN) {
REST.set_header_content_type(response, REST.type.TEXT_PLAIN);
snprintf((char *)buffer, REST_MAX_CHUNK_SIZE, "%s", ds1820[0].stemp);
REST.set_response_payload(response, buffer, strlen((char *)buffer));
} else if(accept == REST.type.APPLICATION_JSON) {
REST.set_header_content_type(response, REST.type.APPLICATION_JSON);
snprintf((char *)buffer, REST_MAX_CHUNK_SIZE, "{'temperature':%s}", ds1820[0].stemp);
REST.set_response_payload(response, buffer, strlen((char *)buffer));
} else {
REST.set_response_status(response, REST.status.NOT_ACCEPTABLE);
const char *msg = "Supporting content-types text/plain and application/json";
REST.set_response_payload(response, msg, strlen(msg));
}
}

10
examples/osd/arduino-climate3/sketch.h Normal file
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@ -0,0 +1,10 @@
#ifndef Sketch_h
#define Sketch_h
struct dstemp{
float ftemp;
char stemp[8];
};
extern struct dstemp ds1820[7];
#endif

93
examples/osd/arduino-climate3/sketch.pde
View file

@ -12,30 +12,108 @@
#include <Wire.h> #include <Wire.h>
#include "Adafruit_HTU21DF.h" #include "Adafruit_HTU21DF.h"
#include <OneWire.h>
#include "DallasTemperature.h"
extern "C" { extern "C" {
#include "rest-engine.h" #include "rest-engine.h"
#include "sketch.h"
extern volatile uint8_t mcusleepcycle; // default 16 extern volatile uint8_t mcusleepcycle; // default 16
// Data wire is plugged into port 2 on the Arduino
#define ONE_WIRE_BUS 3
#define TEMPERATURE_PRECISION 9
// Setup a oneWire instance to communicate with any OneWire devices (not just Maxim/Dallas temperature ICs)
OneWire oneWire(ONE_WIRE_BUS);
// Pass our oneWire reference to Dallas Temperature.
DallasTemperature dsensors(&oneWire);
// arrays to hold device addresses
DeviceAddress outsideThermometer;
Adafruit_HTU21DF htu = Adafruit_HTU21DF(); Adafruit_HTU21DF htu = Adafruit_HTU21DF();
extern resource_t res_htu21dtemp, res_htu21dhum, res_battery; extern resource_t res_htu21dtemp, res_htu21dhum, res_dtemp1, res_battery;
float htu21d_hum; float htu21d_hum;
float htu21d_temp; float htu21d_temp;
char htu21d_hum_s[8]; char htu21d_hum_s[8];
char htu21d_temp_s[8]; char htu21d_temp_s[8];
float d_temp;
char d_temp_s[8];
// sketch.h
struct dstemp ds1820[7];
#define LED_PIN 4 #define LED_PIN 4
} }
// main functions to print information about a device
void printAddress(uint8_t* adress)
{
printf("%02X",adress[0]);
printf("%02X",adress[1]);
printf("%02X",adress[2]);
printf("%02X",adress[3]);
printf("%02X",adress[4]);
printf("%02X",adress[5]);
printf("%02X",adress[6]);
printf("%02X",adress[7]);
}
// function to print the temperature for a device
void printTemperature(DeviceAddress deviceAddress,int index)
{
d_temp = dsensors.getTempC(deviceAddress);
dtostrf(d_temp , 6, 2, d_temp_s );
printf("Temp C: ");
printf("%s",d_temp_s);
// copy to structure
ds1820[index].ftemp=d_temp;
strcpy(ds1820[index].stemp, d_temp_s);
}
void printData(DeviceAddress deviceAddress, int index)
{
printf("Device Address: ");
printAddress(deviceAddress);
printf(" ");
printTemperature(deviceAddress,index);
printf("\n");
}
void setup (void) void setup (void)
{ {
// switch off the led // switch off the led
pinMode(LED_PIN, OUTPUT); pinMode(LED_PIN, OUTPUT);
digitalWrite(LED_PIN, HIGH); digitalWrite(LED_PIN, HIGH);
// ds1820 sensor
printf("Dallas Temperature IC Control Library Demo");
// Start up the library
dsensors.begin();
// locate devices on the bus
printf("Locating devices...\n");
printf("Found ");
printf("%d",dsensors.getDeviceCount());
printf(" devices.\n");
// report parasite power requirements
printf("Parasite power is: ");
if (dsensors.isParasitePowerMode()) printf("ON\n");
else printf("OFF\n");
if (!dsensors.getAddress(outsideThermometer, 0)) printf("Unable to find address for Device 0\n");
// show the addresses we found on the bus
printf("Device 0 Address: ");
printAddress(outsideThermometer);
printf("\n");
// set the resolution to 9 bit
dsensors.setResolution(outsideThermometer, 9);
printf("Device 0 Resolution: ");
printf("%d",dsensors.getResolution(outsideThermometer));
printf("\n");
// htu21d sensor // htu21d sensor
if (!htu.begin()) { if (!htu.begin()) {
printf("Couldn't find sensor!"); printf("Couldn't find sensor!");
@ -44,6 +122,7 @@ void setup (void)
rest_init_engine (); rest_init_engine ();
rest_activate_resource (&res_htu21dtemp, "s/temp"); rest_activate_resource (&res_htu21dtemp, "s/temp");
rest_activate_resource (&res_htu21dhum, "s/hum"); rest_activate_resource (&res_htu21dhum, "s/hum");
rest_activate_resource (&res_dtemp1, "s/t1/temp");
rest_activate_resource (&res_battery, "s/battery"); rest_activate_resource (&res_battery, "s/battery");
} }
@ -52,6 +131,14 @@ void setup (void)
void loop (void) void loop (void)
{ {
mcusleepcycle=0; // dont sleep mcusleepcycle=0; // dont sleep
// call sensors.requestTemperatures() to issue a global temperature
// request to all devices on the bus
printf("Requesting temperatures...");
dsensors.requestTemperatures();
printf("DONE\n");
// print the device information
printData(outsideThermometer,0);
htu21d_temp = htu.readTemperature(); htu21d_temp = htu.readTemperature();
htu21d_hum = htu.readHumidity(); htu21d_hum = htu.readHumidity();
mcusleepcycle=32; // sleep, wakeup every 32 cycles mcusleepcycle=32; // sleep, wakeup every 32 cycles
@ -66,6 +153,6 @@ void loop (void)
} }
// debug only // debug only
// printf("Temp: %s",htu21d_temp_s); printf("Temp: %s",htu21d_temp_s);
// printf("\t\tHum: %s\n",htu21d_hum_s); printf("\t\tHum: %s\n",htu21d_hum_s);
} }