Component: Thermistor (Environmental)
| Author | Matrix TSL |
| Version | 1.1 |
| Category | Environmental |
Thermistor component
A generic thermistor component that can be used to simulate and create code for any thermistor with a known temperature/resistance curve. Thermistor is connected in a simple potential divider circuit - thermistor between ADC input and 0V, and a fixed resistor between ADC and the positive supply. Default calibration is for the EBM003 module.
Detailed description
No detailed description exists yet for this component
Examples
No additional examples
Downloadable macro reference
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GetIntegerTemperature |
| Reads the ADC input and returns the calculated Temperature as Integer degrees C | |
| [[File:]] - | Return |
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SetChannel |
| Set the ADC Channel | |
| [[File:]] - | ChannelID |
 - VOID
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Return |
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SetMinMax |
| Set the minimum and maximum temperature values that can be shown and set on the thermometer readout. | |
| [[File:]] - | Min |
| Minimum Value | |
| [[File:]] - | Max |
| Maximum Value | |
| - VOID
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Return |
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GetRealTemperature |
| Reads the ADC input and Returns the calculated Temperature as Float value in degrees C | |
| [[File:]] - | Return |
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SetTemperature |
| Sends the given temperature to the display, and calculates the internal values used by the simulated read macros. | |
| [[File:]] - | Temperature |
| Zero to one value - representing min-max of the sensor. | |
| - VOID
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Return |
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CalculateTemperature |
| Converts the input ADC value and returns the Temperature in tenths of degree C | |
 - UINT
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ADCValue |
| ADC Reading to be converted | |
| [[File:]] - | Return |
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GetADCValue |
| Returns the Raw ADC value from the Analogue Channel | |
| - UINT
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Return |
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Initialise |
| Initialise to default of 11 bit resolution | |
 - BYTE
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Return |
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Initialise |
| Configures each matching sensor on the bus with the specified conversion bits. | |
| - VOID
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Return |
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WriteRegister |
| A simple example showing a generic way to write a register using I2C. | |
| - BYTE
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Address |
| - BYTE
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Data |
| - VOID
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Return |
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Initialise |
| [[File:]] - | Return |
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Initialise |
| Sets up up the communication bus and initialises the accelerometer module. Returns 0 for success and > 0 for fail. | |
| - BYTE
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Return |
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IOSetOutputPin |
| Sets the selected digital pin to an output and assigns the output state. | |
| - BYTE
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Pin |
| Range: 0-29 | |
| [[File:]] - | State |
| Range: 0-1 | |
| - VOID
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Return |
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UARTReceive |
| Receives a data byte from the UART. Recommend calling the UARTCheckRx function first to ensure data is available. | |
| - BYTE
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Channel |
| Channel Index: Range 0 - UART Bus Count - 1 | |
| - BYTE
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Return |
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ADCSampleAverage10 |
| 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 | |
| - BYTE
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ADCChannel |
| Range: 0, 3-7 | |
| - BYTE
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SampleCount |
| Range: 1- 100 | |
| - BYTE
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SampleDelay |
| Delay in us between each sample | |
| - UINT
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Return |
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OneWireScanBus |
| Scans the one wire bus to detect all connected devices. Returns the number of one wire devices found. | |
| - BYTE
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Channel |
| Channel Index: Range 0 - I2C Bus Count - 1 | |
| - BYTE
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Return |
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SPIInitialise |
| Initialsie the SPI module ready for communications | |
| - BYTE
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Channel |
| Channel Index: Range 0 - SPI Bus Count - 1 | |
| - VOID
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Return |
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OneWireReceiveByte |
| Receives a byte from the one wire bus a bit at a time | |
| - BYTE
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Channel |
| Channel Index: Range 0 - I2C Bus Count - 1 | |
| - BYTE
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Return |
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I2CSend |
| Transmit a byte using the I2C bus | |
| - BYTE
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Channel |
| Channel Index: Range 0 - I2C Bus Count - 1 | |
| - BYTE
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DataOut |
| [[File:]] - | Return |
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UARTSend |
| Send a byte via the UART module | |
| - BYTE
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Channel |
| Channel Index: Range 0 - UART Bus Count - 1 | |
| - BYTE
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Data |
| Data Byte to send. Range: 0-255 | |
| - VOID
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Return |
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OneWireGetDeviceCount |
| Returns the number of devices found by the last ScanBus operation. | |
| - BYTE
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Channel |
| Channel Index: Range 0 - I2C Bus Count - 1 | |
| - BYTE
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Return |
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PWMSetPrescaler |
| Sets the prescaler for the PWM output | |
| - BYTE
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Channel |
| Range: 0 - 11 | |
| - BYTE
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Prescaler |
| - BYTE
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Period |
| - VOID
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Return |
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PWMEnable |
| Enable a PWM output | |
| - BYTE
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Channel |
| Range: 0-11 | |
| - VOID
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Return |
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ADCSampleArray10 |
| 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 | |
| - BYTE
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ADCChannel |
| Range: 0, 3-7 | |
| - BYTE
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SampleCount |
| Range: 1- 32 | |
| - UINT
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SampleDelay |
| Delay in us between each sample | |
| - UINT
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Samples |
| 10-bit samples returned from the function | |
| - VOID
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Return |
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ADCSampleAverage8 |
| 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 | |
| - BYTE
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ADCChannel |
| Range: 0, 3-7 | |
| - BYTE
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SampleCount |
| Range: 1- 100 | |
| - BYTE
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SampleDelay |
| Delay in us between each sample | |
| - BYTE
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Return |
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Initialise |
| Initialise the comms to the Arduino board ready for commands to be sent. | |
| - VOID
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Return |
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PWMEnable |
| 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 | |
| - BYTE
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EnableMask |
| Range 0-63 or 0b00000 to 0b111111 | |
| - VOID
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Return |
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Initialise |
| - VOID
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Return |
Property reference
|
Properties |
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ADC Channel |
| The ADC channel to which the thermistor circuit is connected. It is assumed that the thermistor is connected between the ADC pin and 0V, with a fixed resistor connected between the ADC pin and +V. | |
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ADC Bit Resolution |
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Conversion speed |
| Clock setting to select how fast the ADC peripheral will perform an ADC conversion. The FRC setting is based on a RC time base and so will vary with temperature and pressure. Other settings are generally based on divisions of the master clock. | |
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Acquisition cycles |
| Number of micro seconds to wait for the ADC input to charge before starting the analogue sample. | |
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Wiring |
| Specifies the arrangement of the Thermistor and Fixed Resistor. Pull Down - Thermistor connected between ADC pin and GND, fixed resistor between ADC pin and VCC. Pull Up - Thermistor connected between ADC pin and VCC, fixed resistor between ADC pin and GND. | |
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Resistor Value |
| Value in Ohms of the pullup series resistor. i.e. The resistor is connected between the ADC pin and the positive supply rail. | |
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-25C Thermistor Value |
| Value in Ohms of the Thermistor at -25 deg C | |
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0C Thermistor Value |
| Value in Ohms of the Thermistor at 0 deg C | |
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25C Thermistor Value |
| Value in Ohms of the Thermistor at 25 deg C | |
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50C Thermistor Value |
| Value in Ohms of the Thermistor at 50 deg C | |
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75C Thermistor Value |
| Value in Ohms of the Thermistor at 75 deg C | |
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100C Thermistor Value |
| Value in Ohms of the Thermistor at 100 deg C | |
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125C Thermistor Value |
| Value in Ohms of the Thermistor at 125 deg C | |
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Connections |
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Simulations |
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Label |
| A text label to help you identify the component on the panel. | |
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Min. Temp. |
| Minimum termperature that can be set or displayed on the thermometer slider. | |
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Max. Temp. |
| Maximum termperature that can be set or displayed on the thermometer slider. | |
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Scale divisions |
| Number of numbered divisions shown on the thermometer scale. | |