Jonas Gartmann / Mbed OS EMPA_AutomationTraining_SCD41_Template

Template Software STM32F429 Discovery Kit with SCD41 CO2 Sensor

Dependencies:   LCD_DISCO_F429ZI TS_DISCO_F429ZI BSP_DISCO_F429ZI

scd30.h@8:6906f3ee5538, 2021-03-19 (annotated)

Committer:
garj
Date:
Fri Mar 19 07:49:19 2021 +0000
Revision:
8:6906f3ee5538
Parent:
7:17a87b6d8516
Child:
9:4d526b2f44e9
fix i2c addr

Who changed what in which revision?

UserRevisionLine numberNew contents of line
garj 7:17a87b6d8516 1 #ifndef SCD30_H
garj 7:17a87b6d8516 2 #define SCD30_H
garj 7:17a87b6d8516 3
garj 7:17a87b6d8516 4 #include "mbed.h"
garj 7:17a87b6d8516 5 // i2c sensor address
garj 8:6906f3ee5538 6 #define SCD30_ADR = 0x61
garj 7:17a87b6d8516 7 // sensor automatically starts measurement. RDY pin signals measurement ready.
garj 7:17a87b6d8516 8 #define COMMAND_CONTINUOUS_MEASUREMENT {0x00, 0x10, 0x00, 0x00, 0x00}
garj 7:17a87b6d8516 9 #define COMMAND_CONTINUOUS_MEASUREMENT_LEN sizeof(COMMAND_CONTINUOUS_MEASUREMENT)
garj 7:17a87b6d8516 10 // 2s measurement Interval
garj 7:17a87b6d8516 11 #define COMMAND_SET_MEASUREMENT_INTERVAL {0x46, 0x00, 0x00, 0x02, 0x00}
garj 7:17a87b6d8516 12 #define COMMAND_SET_MEASUREMENT_INTERVAL_LEN sizeof(COMMAND_SET_MEASUREMENT_INTERVAL)
garj 7:17a87b6d8516 13 // automatic self calibration on
garj 7:17a87b6d8516 14 #define COMMAND_AUTOMATIC_SELF_CALIBRATION {0x53, 0x06, 0x00, 0x01, 0x00}
garj 7:17a87b6d8516 15 #define COMMAND_AUTOMATIC_SELF_CALIBRATION_LEN sizeof(COMMAND_AUTOMATIC_SELF_CALIBRATION)
garj 7:17a87b6d8516 16 // command that needs to be sent before reading out the measurement result
garj 7:17a87b6d8516 17 #define COMMAND_READ_MEASUREMENT {0x03, 0x00}
garj 7:17a87b6d8516 18 #define COMMAND_READ_MEASUREMENT_LEN sizeof(COMMAND_READ_MEASUREMENT)
garj 7:17a87b6d8516 19
garj 7:17a87b6d8516 20 /** Create SCD30 controller class
garj 7:17a87b6d8516 21 *
garj 7:17a87b6d8516 22 * @param Scd30 class
garj 7:17a87b6d8516 23 *
garj 7:17a87b6d8516 24 */
garj 7:17a87b6d8516 25 class Scd30 {
garj 7:17a87b6d8516 26
garj 7:17a87b6d8516 27 public:
garj 7:17a87b6d8516 28 enum ScdError {
garj 7:17a87b6d8516 29 SCD_ERROR_NO_ERROR,
garj 7:17a87b6d8516 30 SCD_ERROR_COM_ERROR
garj 7:17a87b6d8516 31 };
garj 7:17a87b6d8516 32
garj 7:17a87b6d8516 33 /** Create a SCD30 object using the specified I2C object
garj 7:17a87b6d8516 34 * @param sda - mbed I2C interface pin
garj 7:17a87b6d8516 35 * @param scl - mbed I2C interface pin
garj 7:17a87b6d8516 36 * @param I2C Frequency (in Hz)
garj 7:17a87b6d8516 37 *
garj 7:17a87b6d8516 38 * @return none
garj 7:17a87b6d8516 39 */
garj 7:17a87b6d8516 40 Scd30(PinName sda, PinName scl, int i2cFrequency, PinName rdy);
garj 7:17a87b6d8516 41
garj 7:17a87b6d8516 42 /** Initialize settings and start Auto-Measurement
garj 7:17a87b6d8516 43 *
garj 7:17a87b6d8516 44 * @param --none--
garj 7:17a87b6d8516 45 *
garj 7:17a87b6d8516 46 * @return enum ScdError
garj 7:17a87b6d8516 47 */
garj 7:17a87b6d8516 48 uint8_t init();
garj 7:17a87b6d8516 49
garj 7:17a87b6d8516 50 /** Check if measurement is ready
garj 7:17a87b6d8516 51 *
garj 7:17a87b6d8516 52 * @param --none--
garj 7:17a87b6d8516 53 *
garj 7:17a87b6d8516 54 * @return bool true=ready
garj 7:17a87b6d8516 55 */
garj 7:17a87b6d8516 56 bool isMeasurementReady();
garj 7:17a87b6d8516 57
garj 7:17a87b6d8516 58 /** Read all environmental parameters (CO2, Temp and Hum) from sensor
garj 7:17a87b6d8516 59 *
garj 7:17a87b6d8516 60 * @param --none-
garj 7:17a87b6d8516 61 *
garj 7:17a87b6d8516 62 * @return enum ScdError
garj 7:17a87b6d8516 63 */
garj 7:17a87b6d8516 64 uint8_t readMeasurement();
garj 7:17a87b6d8516 65
garj 7:17a87b6d8516 66 /** Get current CO2 value
garj 7:17a87b6d8516 67 *
garj 7:17a87b6d8516 68 * @param --none--
garj 7:17a87b6d8516 69 *
garj 7:17a87b6d8516 70 * @return enum SCDerror
garj 7:17a87b6d8516 71 */
garj 7:17a87b6d8516 72 float getCo2(){ return _co2;};
garj 7:17a87b6d8516 73
garj 7:17a87b6d8516 74 private:
garj 7:17a87b6d8516 75 I2C _i2c;
garj 7:17a87b6d8516 76 DigitalIn _rdy;
garj 7:17a87b6d8516 77 float _co2;
garj 7:17a87b6d8516 78
garj 7:17a87b6d8516 79 };
garj 7:17a87b6d8516 80 #endif