| /Zephyr-latest/drivers/sensor/maxim/max31865/ |
| D | max31865.c | 81 * Apply the Callendar-Van Dusen equation to convert the RTD resistance
87 * @param resistance measured resistance
88 * @param resistance_0 constant resistance at 0oC
91 static double calculate_temperature(double resistance, double resistance_0) in calculate_temperature() argument
94 double delta = (RTD_A * RTD_A) - 4 * RTD_B * (1.0 - resistance / resistance_0); in calculate_temperature()
100 resistance /= resistance_0; in calculate_temperature()
101 resistance *= 100.0; in calculate_temperature()
102 temperature = RTD_C[0] + RTD_C[1] * resistance + RTD_C[2] * pow(resistance, 2) - in calculate_temperature()
103 RTD_C[3] * pow(resistance, 3) - RTD_C[4] * pow(resistance, 4) + in calculate_temperature()
104 RTD_C[5] * pow(resistance, 5); in calculate_temperature()
[all …]
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| /Zephyr-latest/samples/shields/lmp90100_evb/rtd/src/ |
| D | main.c | 17 /* Nominal RTD (PT100) resistance in ohms */
26 static double rtd_temperature(int nom, double resistance) in rtd_temperature() argument
34 (nom - resistance)); in rtd_temperature()
44 double resistance; in main() local
74 resistance = (buffer / adc_max) * BOTTOM_RESISTANCE; in main()
75 printf("R: %.02f ohm\n", resistance); in main()
78 resistance)); in main()
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| /Zephyr-latest/scripts/utils/ |
| D | ntc_thermistor_table.py | 16 Nominal resistance (R25) - The thermistor's resistance measured at 25C
17 Beta value (25/85) - This is the resistance value at 25C and at 85C
39 resistance = r25 * math.exp(exp)
41 return resistance
56 resistance = beta_equation_calc_resistance(r25, beta, temp)
57 table.append(f"<({int(temp)}) {int(resistance)}>")
67 "-r25", type=float, required=True, help="Nominal resistance of thermistor"
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| /Zephyr-latest/dts/bindings/iio/afe/ |
| D | voltage-divider.yaml | 6 resistance of the upper leg.
22 Resistance of the lower leg of the voltage divider
27 Resistance of the full path through the voltage divider.
30 resistance-based sensor.
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| D | current-sense-shunt.yaml | 27 Resistance of the shunt resistor in micro-ohms
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| D | current-sense-amplifier.yaml | 27 Resistance of the shunt resistor in milli-ohms.
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| /Zephyr-latest/dts/bindings/sensor/ |
| D | maxim,max31865.yaml | 15 resistance-at-zero:
18 description: Sensor resistance in ohms at 0 Celsius (100 ohms for PT100, 1000 ohms for PT1000)
20 resistance-reference:
23 description: Circuit reference resistance in ohms (recommended on MAX31865 datasheet 400 ohms
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| D | ntc-thermistor.yaml | 25 The pullup resistance in the circuit.
30 The pulldown resistance in the circuit.
37 assumed to be connected-ground, which usually means a pull-down resistance
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| D | ntc-thermistor-generic.yaml | 15 Compensation table, formatted as temperature, resistance pairs. A script
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| D | nordic,npm1300-charger.yaml | 61 description: Thermistor nominal resistance type in ohms.
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| /Zephyr-latest/drivers/sensor/ntc_thermistor/ |
| D | ntc_thermistor.h | 35 * @param[in] ohm Read resistance of NTC thermistor
42 * @brief Calculate the resistance read from NTC thermistor.
48 * @return Thermistor resistance
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| /Zephyr-latest/drivers/sensor/ams/ams_iAQcore/ |
| D | iAQcore.h | 16 int32_t resistance; member
28 int32_t resistance; member
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| D | iAQcore.c | 51 drv_data->resistance = sys_be32_to_cpu(buf.resistance); in iaqcore_sample_fetch()
86 val->val1 = drv_data->resistance; in iaqcore_channel_get()
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| /Zephyr-latest/tests/drivers/w1/w1_api/boards/ |
| D | nucleo_g0b1re.overlay | 11 * with approximately R=5k resistance is suggested.
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| /Zephyr-latest/samples/boards/espressif/deep_sleep/ |
| D | Kconfig | 24 wake-up, an external pull-up resistance is necessary.
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| /Zephyr-latest/drivers/sensor/aosong/ags10/ |
| D | ags10.h | 24 #define AGS10_REG_ZERO_POINT_CALIBRATION_SET 0x0000 /* Set sensor resistance to zero-point */
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| /Zephyr-latest/include/zephyr/drivers/adc/ |
| D | current_sense_shunt.h | 46 /* multiplies by 1,000,000 before dividing by shunt resistance in micro-ohms. */ in current_sense_shunt_scale_dt()
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| /Zephyr-latest/dts/bindings/rtc/ |
| D | microcrystal,rv3028.yaml | 48 Enable the trickle charger with provided current-limiting resistance in ohms. The trickle
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| /Zephyr-latest/samples/shields/lmp90100_evb/rtd/ |
| D | README.rst | 10 of a Resistance Temperature Detector (RTD) sensor using the LMP90100
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| /Zephyr-latest/dts/bindings/w1/ |
| D | maxim,ds2477_85_common.yaml | 54 Default 1-Wire Weak Pullup Resistance in ohms.
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| /Zephyr-latest/samples/sensor/sgp40_sht4x/ |
| D | README.rst | 66 to the logarithm of the sensors resistance, hence it is labeled as [a.u.]
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| /Zephyr-latest/drivers/lora/ |
| D | sx126x_stm32wl.c | 80 /* Better Resistance of the RFO High Power Tx to Antenna in sx126x_set_tx_params()
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| /Zephyr-latest/dts/bindings/pinctrl/ |
| D | nxp,mcux-rt-pinctrl.yaml | 127 currently the only supported pull down resistance.
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| /Zephyr-latest/tests/drivers/build_all/sensor/ |
| D | spi.dtsi | 215 resistance-at-zero = <100>;
216 resistance-reference = <430>;
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| /Zephyr-latest/include/zephyr/drivers/ |
| D | sensor_data_types.h | 139 q31_t resistance; /**< Unit: ohms */ member
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