Neil Thiessen / LM75B

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LM75B Class Reference
Public Types | Public Member Functions

LM75B Class Reference

LM75B class. More...

#include <LM75B.h>

Public Types

enum  Address {
  ADDRESS_0 = (0x48 << 1), ADDRESS_1 = (0x49 << 1), ADDRESS_2 = (0x4A << 1), ADDRESS_3 = (0x4B << 1),
  ADDRESS_4 = (0x4C << 1), ADDRESS_5 = (0x4D << 1), ADDRESS_6 = (0x4E << 1), ADDRESS_7 = (0x4F << 1)
}
 

Represents the different I2C address possibilities for the LM75B.

More...
enum  PowerMode { POWER_NORMAL, POWER_SHUTDOWN }
 

Represents the power mode of the LM75B.

More...
enum  OSMode { OS_COMPARATOR, OS_INTERRUPT }
 

Represents OS pin mode of the LM75B.

More...
enum  OSPolarity { OS_ACTIVE_LOW, OS_ACTIVE_HIGH }
 

Represents OS pin polarity of the LM75B.

More...
enum  OSFaultQueue { OS_FAULT_QUEUE_1, OS_FAULT_QUEUE_2, OS_FAULT_QUEUE_4, OS_FAULT_QUEUE_6 }
 

Represents OS pin fault queue length of the LM75B.

More...

Public Member Functions

 LM75B (PinName sda, PinName scl, Address addr=ADDRESS_0, int hz=400000)
 Create an LM75B object connected to the specified I2C pins with the specified I2C slave address.
bool open ()
 Probe for the LM75B and indicate if it's present on the bus.
LM75B::PowerMode powerMode ()
 Get the current power mode of the LM75B.
void powerMode (PowerMode mode)
 Set the power mode of the LM75B.
LM75B::OSMode osMode ()
 Get the current OS pin mode of the LM75B.
void osMode (OSMode mode)
 Set the OS pin mode of the LM75B.
LM75B::OSPolarity osPolarity ()
 Get the current OS pin polarity of the LM75B.
void osPolarity (OSPolarity polarity)
 Set the OS pin polarity of the LM75B.
LM75B::OSFaultQueue osFaultQueue ()
 Get the current OS pin fault queue length of the LM75B.
void osFaultQueue (OSFaultQueue queue)
 Set the OS pin fault queue length of the LM75B.
float alertTemp ()
 Get the current alert temperature threshold of the LM75B.
void alertTemp (float temp)
 Set the alert temperature threshold of the LM75B.
float alertHyst ()
 Get the current alert temperature hysteresis threshold of the LM75B.
void alertHyst (float temp)
 Set the alert temperature hysteresis threshold of the LM75B.
float temp ()
 Get the current temperature measurement of the LM75B.
 operator float ()
 A shorthand for temp()

Detailed Description

LM75B class.

Used for controlling an LM75B temperature sensor connected via I2C.

Example: 

 #include "mbed.h"
 #include "LM75B.h"

 //Create an LM75B object at the default address (ADDRESS_0)
 LM75B sensor(p28, p27);

 int main()
 {
     //Try to open the LM75B
     if (sensor.open()) {
         printf("Device detected!\n");

         while (1) {
             //Print the current temperature
             printf("Temp = %.3f\n", (float)sensor);

             //Sleep for 0.5 seconds
             wait(0.5);
         }
     } else {
         error("Device not detected!\n");
     }
 }

Definition at line 52 of file LM75B.h.

Member Enumeration Documentation

enum Address

Represents the different I2C address possibilities for the LM75B.

Enumerator:
ADDRESS_0 

A[2:0] pins = 000.

ADDRESS_1 

A[2:0] pins = 001.

ADDRESS_2 

A[2:0] pins = 010.

ADDRESS_3 

A[2:0] pins = 011.

ADDRESS_4 

A[2:0] pins = 100.

ADDRESS_5 

A[2:0] pins = 101.

ADDRESS_6 

A[2:0] pins = 110.

ADDRESS_7 

A[2:0] pins = 111.

Definition at line 57 of file LM75B.h.

enum OSFaultQueue

Represents OS pin fault queue length of the LM75B.

Enumerator:
OS_FAULT_QUEUE_1 

OS is asserted after 1 fault.

OS_FAULT_QUEUE_2 

OS is asserted after 2 consecutive faults.

OS_FAULT_QUEUE_4 

OS is asserted after 4 consecutive faults.

OS_FAULT_QUEUE_6 

OS is asserted after 6 consecutive faults.

Definition at line 91 of file LM75B.h.

enum OSMode

Represents OS pin mode of the LM75B.

Enumerator:
OS_COMPARATOR 

OS is asserted when the temperature reaches the alert threshold, and de-asserted when the temperature drops below the alert hysteresis threshold.

OS_INTERRUPT 

OS is asserted when the temperature reaches the alert threshold, or drops below the alert hysteresis threshold, and only de-asserted when a register has been read.

Definition at line 77 of file LM75B.h.

enum OSPolarity

Represents OS pin polarity of the LM75B.

Enumerator:
OS_ACTIVE_LOW 

OS is a logic low when asserted, and a logic high when de-asserted.

OS_ACTIVE_HIGH 

OS is a logic high when asserted, and a logic low when de-asserted.

Definition at line 84 of file LM75B.h.

enum PowerMode

Represents the power mode of the LM75B.

Enumerator:
POWER_NORMAL 

Chip is enabled and samples every 100ms.

POWER_SHUTDOWN 

Chip is in low-power shutdown mode.

Definition at line 70 of file LM75B.h.

Constructor & Destructor Documentation

LM75B ( PinName  sda,
PinName  scl,
Address  addr = ADDRESS_0,
int  hz = 400000 
)

Create an LM75B object connected to the specified I2C pins with the specified I2C slave address.

Parameters:
sdaThe I2C data pin.
sclThe I2C clock pin.
addrThe I2C slave address (defaults to ADDRESS_0).
hzThe I2C bus frequency (defaults to 400kHz).

Definition at line 19 of file LM75B.cpp.

Member Function Documentation

float alertHyst (  )

Get the current alert temperature hysteresis threshold of the LM75B.

Returns:
The current alert temperature hysteresis threshold in °C.

Definition at line 166 of file LM75B.cpp.

void alertHyst ( float  temp )

Set the alert temperature hysteresis threshold of the LM75B.

Parameters:
tempThe new alert temperature hysteresis threshold in °C.

Definition at line 172 of file LM75B.cpp.

void alertTemp ( float  temp )

Set the alert temperature threshold of the LM75B.

Parameters:
tempThe new alert temperature threshold in °C.

Definition at line 160 of file LM75B.cpp.

float alertTemp (  )

Get the current alert temperature threshold of the LM75B.

Returns:
The current alert temperature threshold in °C.

Definition at line 154 of file LM75B.cpp.

bool open (  )

Probe for the LM75B and indicate if it's present on the bus.

Returns:
'true' if the device exists on the bus, 'false' if the device doesn't exist on the bus.

Definition at line 25 of file LM75B.cpp.

operator float (  )

A shorthand for temp()

Returns:
The current temperature measurement in °C.

Definition at line 195 of file LM75B.cpp.

void osFaultQueue ( OSFaultQueue  queue )

Set the OS pin fault queue length of the LM75B.

Parameters:
queueThe new OS pin fault queue length as an OSFaultQueue enum.

Definition at line 134 of file LM75B.cpp.

LM75B::OSFaultQueue osFaultQueue (  )

Get the current OS pin fault queue length of the LM75B.

Returns:
The current OS pin fault queue length as an OSFaultQueue enum.

Definition at line 118 of file LM75B.cpp.

LM75B::OSMode osMode (  )

Get the current OS pin mode of the LM75B.

Returns:
The current OS pin mode as an OSMode enum.

Definition at line 64 of file LM75B.cpp.

void osMode ( OSMode  mode )

Set the OS pin mode of the LM75B.

Parameters:
modeThe new OS pin mode as an OSMode enum.

Definition at line 76 of file LM75B.cpp.

LM75B::OSPolarity osPolarity (  )

Get the current OS pin polarity of the LM75B.

Returns:
The current OS pin polarity as an OSPolarity enum.

Definition at line 91 of file LM75B.cpp.

void osPolarity ( OSPolarity  polarity )

Set the OS pin polarity of the LM75B.

Parameters:
polarityThe new OS pin polarity as an OSPolarity enum.

Definition at line 103 of file LM75B.cpp.

void powerMode ( PowerMode  mode )

Set the power mode of the LM75B.

Parameters:
modeThe new power mode as a PowerMode enum.

Definition at line 49 of file LM75B.cpp.

LM75B::PowerMode powerMode (  )

Get the current power mode of the LM75B.

Returns:
The current power mode as a PowerMode enum.

Definition at line 37 of file LM75B.cpp.

float temp (  )

Get the current temperature measurement of the LM75B.

Returns:
The current temperature measurement in °C.

Definition at line 178 of file LM75B.cpp.

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