Detailed Description

Driver for the Cambridge CMOS Sensors CCS811 gas and indoor air quality sensor.

Version: 5.1.1

License

This file is licensed under the Silicon Labs License Agreement. See the file "Silabs_License_Agreement.txt" for details. Before using this software for any purpose, you must agree to the terms of that agreement.

Definition in file ccs811.h.

#include <stdbool.h>
#include "ccs811_config.h"

Go to the source code of this file.

Macros
#define	CCS811_ADDR_ALG_RESULT_DATA 0x02

#define	CCS811_ADDR_APP_START 0xF4

#define	CCS811_ADDR_ENV_DATA 0x05

#define	CCS811_ADDR_ERR_ID 0xE0

#define	CCS811_ADDR_FW_APP_VERSION 0x24

#define	CCS811_ADDR_FW_BOOT_VERSION 0x23

#define	CCS811_ADDR_FW_ERASE 0xF1

#define	CCS811_ADDR_FW_PROGRAM 0xF2

#define	CCS811_ADDR_FW_VERIFY 0xF3

#define	CCS811_ADDR_HW_ID 0x20

#define	CCS811_ADDR_HW_VERSION 0x21

#define	CCS811_ADDR_MEASURE_MODE 0x01

#define	CCS811_ADDR_NTC 0x06

#define	CCS811_ADDR_RAW_DATA 0x03

#define	CCS811_ADDR_STATUS 0x00

#define	CCS811_ADDR_SW_RESET 0xFF

#define	CCS811_ADDR_THRESHOLDS 0x10

#define	CCS811_CONFIG_FIRMWARE_UPDATE (0)

#define	CCS811_CONFIG_I2C_BUS_ADDRESS (0xB4)

#define	CCS811_CONFIG_I2C_BUS_TIMEOUT (1000)

#define	CCS811_CONFIG_I2C_DEVICE (I2C0)

#define	CCS811_ERROR_APPLICATION_NOT_PRESENT 0x0001

#define	CCS811_ERROR_DRIVER_NOT_INITIALIZED 0x0003

#define	CCS811_ERROR_FIRMWARE_UPDATE_FAILED 0x0006

#define	CCS811_ERROR_I2C_TRANSACTION_FAILED 0x0004

#define	CCS811_ERROR_INIT_FAILED 0x0005

#define	CCS811_ERROR_NOT_IN_APPLICATION_MODE 0x0002

#define	CCS811_FIRMWARE_UPDATE (CCS811_CONFIG_FIRMWARE_UPDATE)

#define	CCS811_HW_ID 0x81

#define	CCS811_I2C_DEVICE (CCS811_CONFIG_I2C_DEVICE)

#define	CCS811_I2C_DEVICE_BUS_ADDRESS (CCS811_CONFIG_I2C_BUS_ADDRESS)

#define	CCS811_I2C_DEVICE_BUS_TIMEOUT (CCS811_CONFIG_I2C_BUS_TIMEOUT)

#define	CCS811_MEASURE_MODE_DRIVE_MODE_10SEC 0x20

#define	CCS811_MEASURE_MODE_DRIVE_MODE_1SEC 0x10

#define	CCS811_MEASURE_MODE_DRIVE_MODE_60SEC 0x30

#define	CCS811_MEASURE_MODE_DRIVE_MODE_IDLE 0x00

#define	CCS811_MEASURE_MODE_DRIVE_MODE_RAW 0x40

#define	CCS811_MEASURE_MODE_DRIVE_MODE_SHIFT 4

#define	CCS811_MEASURE_MODE_INTERRUPT 0x08

#define	CCS811_MEASURE_MODE_THRESH 0x04

#define	CCS811_OK 0x0000

Functions
uint32_t	CCS811_deInit (void)
	De-initializes the chip. More...

void	CCS811_dumpRegisters (void)
	Dumps the registers of the CSS811. More...

uint32_t	CCS811_getHardwareID (uint8_t *hardwareID)
	Reads Hardware ID from the CSS811 sensor. More...

uint32_t	CCS811_getMeasurement (uint16_t eco2, uint16_t tvoc)
	Reads measurement data (eCO2 and TVOC) from the CSS811 sensor. More...

uint32_t	CCS811_getRawData (uint16_t current, uint16_t rawData)
	Gets the latest readings from the sense resistor of the CSS811 sensor. More...

uint32_t	CCS811_getStatus (uint8_t *status)
	Reads the status of the CSS811 sensor. More...

uint32_t	CCS811_init (void)
	Initializes the chip and performs firmware upgrade if required. More...

bool	CCS811_isDataAvailable (void)
	Checks if new measurement data available. More...

uint32_t	CCS811_readMailbox (uint8_t id, uint8_t length, uint8_t *data)
	Reads data from a specific Mailbox address. More...

uint32_t	CCS811_setEnvData (int32_t tempData, uint32_t rhData)
	Writes temperature and humidity values to the environmental data regs. More...

uint32_t	CCS811_setMeasureMode (uint8_t measMode)
	Sets the measurement mode of the CSS811 sensor. More...

uint32_t	CCS811_softwareReset (void)
	Performs software reset on the CCS811. More...

uint32_t	CCS811_startApplication (void)
	Switches the CSS811 chip from boot to application mode. More...

Detailed Description

License

Macros

Functions