Difference between revisions of "Component: Thermocouple (MAX31855) (Environmental)"

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==Detailed description==
 
==Detailed description==
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==Examples==
 
==Examples==
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|-
 
|-
 
| colspan="2" | Configures the SPI bus ready for communications. 
 
| colspan="2" | Configures the SPI bus ready for communications. 
|-
 
|-
 
| width="10%" align="center" style="border-top: 2px solid #000;" | [[File:Fc9-void-icon.png]] - VOID
 
| width="90%" style="border-top: 2px solid #000;" | ''Return''
 
|}
 
 
 
{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
 
|-
 
| width="10%" align="center" style="background-color:#D8C9D8;" align="center" | [[File:Fc9-comp-macro.png]]
 
| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''Initialise'''
 
|-
 
| colspan="2" | Initialise to default of 11 bit resolution 
 
|-
 
|-
 
| width="10%" align="center" style="border-top: 2px solid #000;" | [[File:Fc9-u8-icon.png]] - BYTE
 
| width="90%" style="border-top: 2px solid #000;" | ''Return''
 
|}
 
 
 
{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
 
|-
 
| width="10%" align="center" style="background-color:#D8C9D8;" align="center" | [[File:Fc9-comp-macro.png]]
 
| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''Initialise'''
 
|-
 
| colspan="2" | Configures each matching sensor on the bus with the specified conversion bits. 
 
|-
 
|-
 
| width="10%" align="center" style="border-top: 2px solid #000;" | [[File:Fc9-void-icon.png]] - VOID
 
| width="90%" style="border-top: 2px solid #000;" | ''Return''
 
|}
 
 
 
{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
 
|-
 
| width="10%" align="center" style="background-color:#D8C9D8;" align="center" | [[File:Fc9-comp-macro.png]]
 
| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''WriteRegister'''
 
|-
 
| colspan="2" | A simple example showing a generic way to write a register using I2C. 
 
|-
 
|-
 
| width="10%" align="center" | [[File:Fc9-u8-icon.png]] - BYTE
 
| width="90%" | Address
 
|-
 
| colspan="2" |  
 
|-
 
| width="10%" align="center" | [[File:Fc9-u8-icon.png]] - BYTE
 
| width="90%" | Data
 
|-
 
| colspan="2" |  
 
|-
 
| width="10%" align="center" style="border-top: 2px solid #000;" | [[File:Fc9-void-icon.png]] - VOID
 
| width="90%" style="border-top: 2px solid #000;" | ''Return''
 
|}
 
 
 
{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
 
|-
 
| width="10%" align="center" style="background-color:#D8C9D8;" align="center" | [[File:Fc9-comp-macro.png]]
 
| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''Initialise'''
 
|-
 
| colspan="2" |  
 
|-
 
|-
 
| width="10%" align="center" style="border-top: 2px solid #000;" | [[File:]] -
 
| width="90%" style="border-top: 2px solid #000;" | ''Return''
 
|}
 
 
 
{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
 
|-
 
| width="10%" align="center" style="background-color:#D8C9D8;" align="center" | [[File:Fc9-comp-macro.png]]
 
| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''Initialise'''
 
|-
 
| colspan="2" | Sets up up the communication bus and initialises the accelerometer module.  Returns 0 for success and > 0 for fail. 
 
|-
 
|-
 
| width="10%" align="center" style="border-top: 2px solid #000;" | [[File:Fc9-u8-icon.png]] - BYTE
 
| width="90%" style="border-top: 2px solid #000;" | ''Return''
 
|}
 
 
 
{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
 
|-
 
| width="10%" align="center" style="background-color:#D8C9D8;" align="center" | [[File:Fc9-comp-macro.png]]
 
| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''IOSetOutputPin'''
 
|-
 
| colspan="2" | Sets the selected digital pin to an output and assigns the output state. 
 
|-
 
|-
 
| width="10%" align="center" | [[File:Fc9-u8-icon.png]] - BYTE
 
| width="90%" | Pin
 
|-
 
| colspan="2" | Range: 0-29 
 
|-
 
| width="10%" align="center" | [[File:]] -
 
| width="90%" | State
 
|-
 
| colspan="2" | Range: 0-1 
 
|-
 
| width="10%" align="center" style="border-top: 2px solid #000;" | [[File:Fc9-void-icon.png]] - VOID
 
| width="90%" style="border-top: 2px solid #000;" | ''Return''
 
|}
 
 
 
{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
 
|-
 
| width="10%" align="center" style="background-color:#D8C9D8;" align="center" | [[File:Fc9-comp-macro.png]]
 
| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''UARTReceive'''
 
|-
 
| colspan="2" | Receives a data byte from the UART. Recommend calling the UARTCheckRx function first to ensure data is available. 
 
|-
 
|-
 
| width="10%" align="center" | [[File:Fc9-u8-icon.png]] - BYTE
 
| width="90%" | Channel
 
|-
 
| colspan="2" | Channel Index: Range 0 - UART Bus Count - 1 
 
|-
 
| width="10%" align="center" style="border-top: 2px solid #000;" | [[File:Fc9-u8-icon.png]] - BYTE
 
| width="90%" style="border-top: 2px solid #000;" | ''Return''
 
|}
 
 
 
{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
 
|-
 
| width="10%" align="center" style="background-color:#D8C9D8;" align="center" | [[File:Fc9-comp-macro.png]]
 
| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''ADCSampleAverage10'''
 
|-
 
| colspan="2" | Reads the voltage present on an Analog pin as an 10-bit value range 0-1023. Performs the selected number of samples with the selected time in microseconds in between samples 
 
|-
 
|-
 
| width="10%" align="center" | [[File:Fc9-u8-icon.png]] - BYTE
 
| width="90%" | ADCChannel
 
|-
 
| colspan="2" | Range: 0, 3-7 
 
|-
 
| width="10%" align="center" | [[File:Fc9-u8-icon.png]] - BYTE
 
| width="90%" | SampleCount
 
|-
 
| colspan="2" | Range: 1- 100 
 
|-
 
| width="10%" align="center" | [[File:Fc9-u8-icon.png]] - BYTE
 
| width="90%" | SampleDelay
 
|-
 
| colspan="2" | Delay in us between each sample 
 
|-
 
| width="10%" align="center" style="border-top: 2px solid #000;" | [[File:Fc9-u16-icon.png]] - UINT
 
| width="90%" style="border-top: 2px solid #000;" | ''Return''
 
|}
 
 
 
{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
 
|-
 
| width="10%" align="center" style="background-color:#D8C9D8;" align="center" | [[File:Fc9-comp-macro.png]]
 
| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''OneWireScanBus'''
 
|-
 
| colspan="2" | Scans the one wire bus to detect all connected devices. Returns the number of one wire devices found. 
 
|-
 
|-
 
| width="10%" align="center" | [[File:Fc9-u8-icon.png]] - BYTE
 
| width="90%" | Channel
 
|-
 
| colspan="2" | Channel Index: Range 0 - I2C Bus Count - 1 
 
|-
 
| width="10%" align="center" style="border-top: 2px solid #000;" | [[File:Fc9-u8-icon.png]] - BYTE
 
| width="90%" style="border-top: 2px solid #000;" | ''Return''
 
|}
 
 
 
{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
 
|-
 
| width="10%" align="center" style="background-color:#D8C9D8;" align="center" | [[File:Fc9-comp-macro.png]]
 
| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''SPIInitialise'''
 
|-
 
| colspan="2" | Initialsie the SPI module ready for communications 
 
|-
 
|-
 
| width="10%" align="center" | [[File:Fc9-u8-icon.png]] - BYTE
 
| width="90%" | Channel
 
|-
 
| colspan="2" | Channel Index: Range 0 - SPI Bus Count - 1 
 
|-
 
| width="10%" align="center" style="border-top: 2px solid #000;" | [[File:Fc9-void-icon.png]] - VOID
 
| width="90%" style="border-top: 2px solid #000;" | ''Return''
 
|}
 
 
 
{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
 
|-
 
| width="10%" align="center" style="background-color:#D8C9D8;" align="center" | [[File:Fc9-comp-macro.png]]
 
| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''OneWireReceiveByte'''
 
|-
 
| colspan="2" | Receives a byte from the one wire bus a bit at a time 
 
|-
 
|-
 
| width="10%" align="center" | [[File:Fc9-u8-icon.png]] - BYTE
 
| width="90%" | Channel
 
|-
 
| colspan="2" | Channel Index: Range 0 - I2C Bus Count - 1 
 
|-
 
| width="10%" align="center" style="border-top: 2px solid #000;" | [[File:Fc9-u8-icon.png]] - BYTE
 
| width="90%" style="border-top: 2px solid #000;" | ''Return''
 
|}
 
 
 
{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
 
|-
 
| width="10%" align="center" style="background-color:#D8C9D8;" align="center" | [[File:Fc9-comp-macro.png]]
 
| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''I2CSend'''
 
|-
 
| colspan="2" | Transmit a byte using the I2C bus 
 
|-
 
|-
 
| width="10%" align="center" | [[File:Fc9-u8-icon.png]] - BYTE
 
| width="90%" | Channel
 
|-
 
| colspan="2" | Channel Index: Range 0 - I2C Bus Count - 1 
 
|-
 
| width="10%" align="center" | [[File:Fc9-u8-icon.png]] - BYTE
 
| width="90%" | DataOut
 
|-
 
| colspan="2" |  
 
|-
 
| width="10%" align="center" style="border-top: 2px solid #000;" | [[File:]] -
 
| width="90%" style="border-top: 2px solid #000;" | ''Return''
 
|}
 
 
 
{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
 
|-
 
| width="10%" align="center" style="background-color:#D8C9D8;" align="center" | [[File:Fc9-comp-macro.png]]
 
| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''UARTSend'''
 
|-
 
| colspan="2" | Send a byte via the UART module 
 
|-
 
|-
 
| width="10%" align="center" | [[File:Fc9-u8-icon.png]] - BYTE
 
| width="90%" | Channel
 
|-
 
| colspan="2" | Channel Index: Range 0 - UART Bus Count - 1 
 
|-
 
| width="10%" align="center" | [[File:Fc9-u8-icon.png]] - BYTE
 
| width="90%" | Data
 
|-
 
| colspan="2" | Data Byte to send. Range: 0-255 
 
|-
 
| width="10%" align="center" style="border-top: 2px solid #000;" | [[File:Fc9-void-icon.png]] - VOID
 
| width="90%" style="border-top: 2px solid #000;" | ''Return''
 
|}
 
 
 
{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
 
|-
 
| width="10%" align="center" style="background-color:#D8C9D8;" align="center" | [[File:Fc9-comp-macro.png]]
 
| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''OneWireGetDeviceCount'''
 
|-
 
| colspan="2" | Returns the number of devices found by the last ScanBus operation. 
 
|-
 
|-
 
| width="10%" align="center" | [[File:Fc9-u8-icon.png]] - BYTE
 
| width="90%" | Channel
 
|-
 
| colspan="2" | Channel Index: Range 0 - I2C Bus Count - 1 
 
|-
 
| width="10%" align="center" style="border-top: 2px solid #000;" | [[File:Fc9-u8-icon.png]] - BYTE
 
| width="90%" style="border-top: 2px solid #000;" | ''Return''
 
|}
 
 
 
{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
 
|-
 
| width="10%" align="center" style="background-color:#D8C9D8;" align="center" | [[File:Fc9-comp-macro.png]]
 
| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''PWMSetPrescaler'''
 
|-
 
| colspan="2" | Sets the prescaler for the PWM output 
 
|-
 
|-
 
| width="10%" align="center" | [[File:Fc9-u8-icon.png]] - BYTE
 
| width="90%" | Channel
 
|-
 
| colspan="2" | Range: 0 - 11 
 
|-
 
| width="10%" align="center" | [[File:Fc9-u8-icon.png]] - BYTE
 
| width="90%" | Prescaler
 
|-
 
| colspan="2" |  
 
|-
 
| width="10%" align="center" | [[File:Fc9-u8-icon.png]] - BYTE
 
| width="90%" | Period
 
|-
 
| colspan="2" |  
 
|-
 
| width="10%" align="center" style="border-top: 2px solid #000;" | [[File:Fc9-void-icon.png]] - VOID
 
| width="90%" style="border-top: 2px solid #000;" | ''Return''
 
|}
 
 
 
{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
 
|-
 
| width="10%" align="center" style="background-color:#D8C9D8;" align="center" | [[File:Fc9-comp-macro.png]]
 
| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''PWMEnable'''
 
|-
 
| colspan="2" | Enable a PWM output 
 
|-
 
|-
 
| width="10%" align="center" | [[File:Fc9-u8-icon.png]] - BYTE
 
| width="90%" | Channel
 
|-
 
| colspan="2" | Range: 0-11 
 
|-
 
| width="10%" align="center" style="border-top: 2px solid #000;" | [[File:Fc9-void-icon.png]] - VOID
 
| width="90%" style="border-top: 2px solid #000;" | ''Return''
 
|}
 
 
 
{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
 
|-
 
| width="10%" align="center" style="background-color:#D8C9D8;" align="center" | [[File:Fc9-comp-macro.png]]
 
| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''ADCSampleArray10'''
 
|-
 
| colspan="2" | Reads the voltage present on an Analog pin as an 10-bit value range 0-1023 Performs the selected number of samples with the selected time in microseconds in between samples and returns each sample in a single packet 
 
|-
 
|-
 
| width="10%" align="center" | [[File:Fc9-u8-icon.png]] - BYTE
 
| width="90%" | ADCChannel
 
|-
 
| colspan="2" | Range: 0, 3-7 
 
|-
 
| width="10%" align="center" | [[File:Fc9-u8-icon.png]] - BYTE
 
| width="90%" | SampleCount
 
|-
 
| colspan="2" | Range: 1- 32 
 
|-
 
| width="10%" align="center" | [[File:Fc9-u16-icon.png]] - UINT
 
| width="90%" | SampleDelay
 
|-
 
| colspan="2" | Delay in us between each sample 
 
|-
 
| width="10%" align="center" | [[File:Fc9-u16-icon.png]] - UINT
 
| width="90%" | Samples
 
|-
 
| colspan="2" | 10-bit samples returned from the function 
 
|-
 
| width="10%" align="center" style="border-top: 2px solid #000;" | [[File:Fc9-void-icon.png]] - VOID
 
| width="90%" style="border-top: 2px solid #000;" | ''Return''
 
|}
 
 
 
{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
 
|-
 
| width="10%" align="center" style="background-color:#D8C9D8;" align="center" | [[File:Fc9-comp-macro.png]]
 
| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''ADCSampleAverage8'''
 
|-
 
| colspan="2" | Reads the voltage present on an Analog pin as an 8-bit value range 0-255 Performs the selected number of samples with the selected time in microseconds in between samples 
 
|-
 
|-
 
| width="10%" align="center" | [[File:Fc9-u8-icon.png]] - BYTE
 
| width="90%" | ADCChannel
 
|-
 
| colspan="2" | Range: 0, 3-7 
 
|-
 
| width="10%" align="center" | [[File:Fc9-u8-icon.png]] - BYTE
 
| width="90%" | SampleCount
 
|-
 
| colspan="2" | Range: 1- 100 
 
|-
 
| width="10%" align="center" | [[File:Fc9-u8-icon.png]] - BYTE
 
| width="90%" | SampleDelay
 
|-
 
| colspan="2" | Delay in us between each sample 
 
|-
 
| width="10%" align="center" style="border-top: 2px solid #000;" | [[File:Fc9-u8-icon.png]] - BYTE
 
| width="90%" style="border-top: 2px solid #000;" | ''Return''
 
|}
 
 
 
{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
 
|-
 
| width="10%" align="center" style="background-color:#D8C9D8;" align="center" | [[File:Fc9-comp-macro.png]]
 
| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''Initialise'''
 
|-
 
| colspan="2" | Initialise the comms to the Arduino board ready for commands to be sent. 
 
|-
 
|-
 
| width="10%" align="center" style="border-top: 2px solid #000;" | [[File:Fc9-void-icon.png]] - VOID
 
| width="90%" style="border-top: 2px solid #000;" | ''Return''
 
|}
 
 
 
{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
 
|-
 
| width="10%" align="center" style="background-color:#D8C9D8;" align="center" | [[File:Fc9-comp-macro.png]]
 
| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''PWMEnable'''
 
|-
 
| colspan="2" | Allows pulse width modulated transistor outputs to be switched on or off. Bit 0 = Enable AB Bit 1 = A / Bit 2 = B Bit 3 = C / Bit 4 = D Bit 5 = Enable CD 
 
|-
 
|-
 
| width="10%" align="center" | [[File:Fc9-u8-icon.png]] - BYTE
 
| width="90%" | EnableMask
 
|-
 
| colspan="2" | Range 0-63 or 0b00000 to 0b111111 
 
|-
 
| width="10%" align="center" style="border-top: 2px solid #000;" | [[File:Fc9-void-icon.png]] - VOID
 
| width="90%" style="border-top: 2px solid #000;" | ''Return''
 
|}
 
 
 
{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
 
|-
 
| width="10%" align="center" style="background-color:#D8C9D8;" align="center" | [[File:Fc9-comp-macro.png]]
 
| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''Initialise'''
 
|-
 
| colspan="2" |  
 
 
|-
 
|-
 
|-
 
|-

Revision as of 11:07, 17 November 2021

Author Matrix TSL
Version 1.0
Category Environmental


Thermocouple component

Component to interface the MAX31855 IC from MAXIM. Uses a standard 3-wire SPI interface to connect to the IC and collect the temperature. IC available in different versions to suit different thermocouple types.

Detailed description

No detailed description exists yet for this component

Examples

Example program showing how to use the Thermocouple component. FC6 Icon.png MAX31855_Example

Downloadable macro reference

Fc9-comp-macro.png ReadReference_Int
Returns the reference temperature from the last sample as an integer value in Degrees C. 
[[File:]] - Return


Fc9-comp-macro.png ReadReference_Float
Returns the reference temperature from the last sample as a floating point value in Degrees C. 
[[File:]] - Return


Fc9-comp-macro.png Sample
Reads the memory of the MAX31855 IC and checks for errors. Must be called before any of the Read functions. Returns: 0=OK, 1=Open Circuit, 2=Short GND, 3=Short VCC 
Fc9-u8-icon.png - BYTE Return


Fc9-comp-macro.png ReadThermocouple_Int
Returns the thermocouple temperature from the last sample as an integer value in Degrees C. 
[[File:]] - Return


Fc9-comp-macro.png ReadThermocouple_Float
Returns the thermocouple temperature from the last sample as a floating point value in Degrees C. 
[[File:]] - Return


Fc9-comp-macro.png Initialise
Configures the SPI bus ready for communications. 
Fc9-void-icon.png - VOID Return



Property reference

Fc9-prop-icon.png Properties
Fc9-type-16-icon.png Thermocouple Type
Specified at the end of the MAX part number MAX31855X where X is the Thermocouple type. Selects which type of thermocouple the IC works with. 
Fc9-type-16-icon.png Channel
SPI Channel selector 
Fc9-type-16-icon.png Prescale
Prescale option selector 
Fc9-type-5-icon.png MOSI
SPI Data Out Pin SDO - Also Known as Master Out Slave In (MOSI) when used in Master mode. 
Fc9-type-5-icon.png MISO
SPI Data In Pin SDI - Also Known as Master In Slave Out (MISO) when used in Master mode. 
Fc9-type-5-icon.png CLK
SPI Clock Pin CLK - The Clock signal is driven by the SPI master. 
Fc9-type-5-icon.png CS / SS
Chip Select / Slave Select Pin Master Mode: General purpose output pin used to select the remote SPI device. Slave Mode: Hardware chip select pin input used to select the SPI device.  
Fc9-type-7-icon.png Console Data
Selects if the console data is automatically generated or not 
Fc9-type-7-icon.png Scope Traces
Selects if the scope traces are automatically generated or not 
Fc9-type-16-icon.png API
 
Fc9-conn-icon.png Connections
Fc9-conn-icon.png Simulations
Fc9-type-7-icon.png Simulate Comms