A collection of Analog Devices drivers for the mbed platform
CN0357 Class Reference
EVAL-CN0357 toxic gas sensor shield. More...
#include <CN0357.h>
Public Types | |
enum | JumperConfig_t { INTERNAL_AD7790 = 0, EXTERNAL_ADC } |
CN0357 shield jumper configuration. More... | |
Public Member Functions | |
CN0357 (PinName CSAD7790=D8, PinName CSAD5270=D6, PinName MOSI=SPI_MOSI, PinName MISO=SPI_MISO, PinName SCK=SPI_SCK) | |
CN0357 constructor. | |
void | init (float range, float sensitivity, JumperConfig_t jp=INTERNAL_AD7790, uint8_t mode_val=_DEFAULT_MODE_VAL, uint8_t filter_val=_DEFAULT_FILTER_VAL) |
initializes the AD7790 and the AD5270 | |
uint8_t | read_adc_status (void) |
reads the status register of the AD7790 | |
uint16_t | read_sensor (void) |
reads the data register of the AD7790 | |
float | read_sensor_voltage (void) |
reads the ADC and computes the sensor voltage | |
float | data_to_voltage (uint16_t data) |
computes voltage from a 16 bit ADC value received as a parameter | |
float | calc_ppm (float adcVoltage) |
computes a value in PPM from a reading received as a param | |
float | read_ppm (void) |
reads and computes the sensor reading in PPM | |
void | set_RDAC_value (float resistor_val) |
sets a new value for the RDAC | |
float | get_RDAC_value (void) |
getter method for RDAC value | |
float | set_sensor_parameters (float range, float sensitivity) |
set sensor range and sensitivity sets sensor range, sensitivity returns suggested resistance value for feedback resistor | |
float | get_sensor_range (void) |
getter method for sensor range | |
float | get_sensor_sensitivity (void) |
getter method for sensor sensitivity | |
Data Fields | |
AD7790 | ad7790 |
AD7790 instance - can be used for manual overriding. | |
AD5270 | ad5270 |
AD5270 instance - can be used for manual overriding. |
Detailed Description
EVAL-CN0357 toxic gas sensor shield.
Definition at line 58 of file CN0357.h.
Member Enumeration Documentation
enum JumperConfig_t |
Constructor & Destructor Documentation
CN0357 | ( | PinName | CSAD7790 = D8 , |
PinName | CSAD5270 = D6 , |
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PinName | MOSI = SPI_MOSI , |
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PinName | MISO = SPI_MISO , |
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PinName | SCK = SPI_SCK |
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) |
CN0357 constructor.
- Parameters:
-
CSAD7790 - (optional)chip select of the AD7790 CSAD5270 - (optional)chip select of the AD5270 MOSI - (optional)pin of the SPI interface MISO - (optional)pin of the SPI interface SCK - (optional)pin of the SPI interface
Definition at line 61 of file CN0357.cpp.
Member Function Documentation
float calc_ppm | ( | float | adcVoltage ) |
computes a value in PPM from a reading received as a param
- Parameters:
-
adcVoltage - voltage to be converted to PPM
- Returns:
- sensor value in PPM
Definition at line 162 of file CN0357.cpp.
float data_to_voltage | ( | uint16_t | data ) |
computes voltage from a 16 bit ADC value received as a parameter
- Parameters:
-
data - ADC value
- Returns:
- sensor voltage
Definition at line 174 of file CN0357.cpp.
float get_RDAC_value | ( | void | ) |
getter method for RDAC value
- Returns:
- value of the RDAC in ohms
Definition at line 193 of file CN0357.cpp.
float get_sensor_range | ( | void | ) |
getter method for sensor range
- Returns:
- sensor range (in ppm)
Definition at line 226 of file CN0357.cpp.
float get_sensor_sensitivity | ( | void | ) |
getter method for sensor sensitivity
- Returns:
- sensor sensitivity (in A/ppm)
Definition at line 217 of file CN0357.cpp.
void init | ( | float | range, |
float | sensitivity, | ||
JumperConfig_t | jp = INTERNAL_AD7790 , |
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uint8_t | mode_val = _DEFAULT_MODE_VAL , |
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uint8_t | filter_val = _DEFAULT_FILTER_VAL |
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) |
initializes the AD7790 and the AD5270
- Parameters:
-
range - range of the sensor used (in ppm) sensitivity - sensitivity of the sensor (A/ppm) jp - (optional)jumper configuration of the CN0357 mode_val - (optional)if jp is set to InternalADC, configures the mode register of the Internal ADC filter_val - (optional)if jp is set to InternalADC, configures the filter register of the Internal ADC
Definition at line 77 of file CN0357.cpp.
uint8_t read_adc_status | ( | void | ) |
reads the status register of the AD7790
- Returns:
- status register value
Definition at line 125 of file CN0357.cpp.
float read_ppm | ( | void | ) |
reads and computes the sensor reading in PPM
- Returns:
- value of the sensor reading in PPM
Definition at line 152 of file CN0357.cpp.
uint16_t read_sensor | ( | void | ) |
reads the data register of the AD7790
- Returns:
- data register value
Definition at line 143 of file CN0357.cpp.
float read_sensor_voltage | ( | void | ) |
reads the ADC and computes the sensor voltage
- Returns:
- sensor voltage
Definition at line 134 of file CN0357.cpp.
void set_RDAC_value | ( | float | resistance ) |
sets a new value for the RDAC
- Parameters:
-
resistance new value for the resistance
- Returns:
- none
Definition at line 184 of file CN0357.cpp.
float set_sensor_parameters | ( | float | range, |
float | sensitivity | ||
) |
set sensor range and sensitivity sets sensor range, sensitivity returns suggested resistance value for feedback resistor
- Parameters:
-
range - range of the sensor used (in ppm) sensitivity - sensitivity of the sensor (in A/ppm)
- Returns:
- suggested resistance value for feedback resistor
Definition at line 206 of file CN0357.cpp.
Field Documentation
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