JC42 compliant temperature sensor driver

JC42 compliant temperature sensor driver. More...

Detailed Description

JC42 compliant temperature sensor driver.

Description

The connection between the MCU and jc42 compliant temperature sensors is based on a I2C-interface. There are multiple jc42 compliant temperature sensors available such as the mcp9804 and the MAX6604. This driver reads the temperature from these sensors. The sensors support a alarm wire, but this is not supported by this driver.

This driver provides [S]ensor [A]ctuator [U]ber [L]ayer capabilities.

Files
file	jc42.h
	Driver for jc42 compliant temperature sensors.
file	jc42_internal.h
	Internal addresses, registers, constants for jc42 sensors.
file	jc42_params.h
	Default configuration for jc42.

Data Structures
struct	jc42_t
	Device descriptor for a jc42 device. More...
struct	jc42_params_t
	Device initialization parameters. More...

Functions
int	jc42_init (jc42_t *dev, const jc42_params_t *params)
	Initialize a jc42 device. More...
int	jc42_get_config (const jc42_t *dev, uint16_t *data)
	Get content of configuration register. More...
int	jc42_set_config (const jc42_t *dev, uint16_t data)
	Set content of configuration register. More...
int	jc42_get_temperature (const jc42_t *dev, int16_t *temperature)
	Get measured temperature. More...

Variables
const saul_driver_t	jc42_temperature_saul_driver
	Export SAUL endpoint.

jc42 status return codes
#define	JC42_OK   (0)
#define	JC42_NOI2C   (-1)
#define	JC42_NODEV   (-2)

Function Documentation

jc42_get_config()

int jc42_get_config	(	const jc42_t *	dev,
		uint16_t *	data
	)

Get content of configuration register.

Parameters

[in]	dev	device descriptor
[out]	data	buffer where config register will be written to

Returns

0 on success

-1 on error

jc42_get_temperature()

int jc42_get_temperature	(	const jc42_t *	dev,
		int16_t *	temperature
	)

Get measured temperature.

Parameters

[in]	dev	device descriptor
[out]	temperature	uint16_t buffer where temperature will be written to in centi-degree

Returns

0 on success

-1 on error

jc42_init()

int jc42_init	(	jc42_t *	dev,
		const jc42_params_t *	params
	)

Initialize a jc42 device.

Parameters

[out]	dev	device descriptor
[in]	params	jc42 initialization struct

Returns

0 on success

-1 on error

jc42_set_config()

int jc42_set_config	(	const jc42_t *	dev,
		uint16_t	data
	)

Set content of configuration register.

Parameters

[in]	dev	device descriptor
[in]	data	new value for configuration register

Returns

0 on success

-1 on error