ADCXX1C ADC device driver

I2C Analog-to-Digital Converter device driver. More...

Detailed Description

I2C Analog-to-Digital Converter device driver.

This driver works with adc081c, adc101c and adc121c versions.

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

Modules
	ADCXX1C driver compile configurations

Files
file	adcxx1c_params.h
	Default configuration for ADCXX1C devices.
file	adcxx1c_regs.h
	Register definition for ADCXX1C devices.
file	adcxx1c.h
	ADCXX1C ADC device driver.

Data Structures
struct	adcxx1c_params
	ADCxx1C params. More...
struct	adcxx1c
	ADCxx1C device descriptor. More...

Macros
#define	ADCXX1C_I2C_ADDRESS   (0x54)
	ADCxx1C default address (ADCxx1C021 address)
#define	ADCXX1C_RES_DEFAULT   (-1)
	ADC default resolution for device variants.

Typedefs
typedef struct adcxx1c_params	adcxx1c_params_t
	ADCxx1C params.
typedef void(*	adcxx1c_cb_t) (void *)
	ADCxx1C alert callback.
typedef struct adcxx1c	adcxx1c_t
	ADCxx1C device descriptor.

Enumerations
enum	{ ADCXX1C_RES_8BITS = 8, ADCXX1C_RES_10BITS = 10, ADCXX1C_RES_12BITS = 12 }
	ADC resolution. More...
enum	{   ADCXX1C_CYCLE_DISABLED = 0, ADCXX1C_CYCLE_32, ADCXX1C_CYCLE_64, ADCXX1C_CYCLE_128,   ADCXX1C_CYCLE_256, ADCXX1C_CYCLE_512, ADCXX1C_CYCLE_1024, ADCXX1C_CYCLE_2048 }
	Conversion interval configuration value. More...
enum	{ ADCXX1C_OK = 0, ADCXX1C_NOI2C = -1, ADCXX1C_NODEV = -2, ADCXX1C_NODATA = -3 }
	Named return values. More...
enum	{ ADCXX1C_ALERT_UNDER_RANGE = 1, ADCXX1C_ALERT_OVER_RANGE = 2 }
	Alert values. More...

Functions
int	adcxx1c_init (adcxx1c_t *dev, const adcxx1c_params_t *params)
	Initialize an ADCxx1C ADC device. More...
int	adcxx1c_read_raw (const adcxx1c_t *dev, int16_t *raw)
	Read a raw ADC value. More...
int	adcxx1c_enable_alert (adcxx1c_t *dev, adcxx1c_cb_t cb, void *arg)
	Enable alert interrupt. More...
int	adcxx1c_set_alert_parameters (const adcxx1c_t *dev, int16_t low_limit, int16_t high_limit, int16_t hysteresis)
	Set the alert parameters. More...
int	adcxx1c_get_and_clear_alert (const adcxx1c_t *dev)
	Get alert source and clear it. More...

Enumeration Type Documentation

anonymous enum

anonymous enum

ADC resolution.

Enumerator
ADCXX1C_RES_8BITS	8 bits resolution (ADC081C family)
ADCXX1C_RES_10BITS	10 bits resolution (ADC101C family)
ADCXX1C_RES_12BITS	12 bits resolution (ADC121C family)

Definition at line 46 of file adcxx1c.h.

anonymous enum

anonymous enum

Conversion interval configuration value.

Enumerator
ADCXX1C_CYCLE_DISABLED	No cycle conversion.
ADCXX1C_CYCLE_32	Conversion cycle = Tconvert x 32.
ADCXX1C_CYCLE_64	Conversion cycle = Tconvert x 64.
ADCXX1C_CYCLE_128	Conversion cycle = Tconvert x 128.
ADCXX1C_CYCLE_256	Conversion cycle = Tconvert x 256.
ADCXX1C_CYCLE_512	Conversion cycle = Tconvert x 512.
ADCXX1C_CYCLE_1024	Conversion cycle = Tconvert x 1024.
ADCXX1C_CYCLE_2048	Conversion cycle = Tconvert x 2048.

Definition at line 69 of file adcxx1c.h.

anonymous enum

anonymous enum

Named return values.

Enumerator
ADCXX1C_OK	everything was fine
ADCXX1C_NOI2C	I2C communication failed.
ADCXX1C_NODEV	no ADCXX1C device found on the bus
ADCXX1C_NODATA	no data available

Definition at line 83 of file adcxx1c.h.

anonymous enum

anonymous enum

Alert values.

Enumerator
ADCXX1C_ALERT_UNDER_RANGE	Measured voltage fell below Vlow.
ADCXX1C_ALERT_OVER_RANGE	Measured voltage exceeded Vhigh.

Definition at line 93 of file adcxx1c.h.

Function Documentation

adcxx1c_enable_alert()

int adcxx1c_enable_alert	(	adcxx1c_t *	dev,
		adcxx1c_cb_t	cb,
		void *	arg
	)

Enable alert interrupt.

Parameters

[in]	dev	device descriptor
[in]	cb	callback called when the alert fires
[in]	arg	callback argument

Returns

zero on success, non zero on error

adcxx1c_get_and_clear_alert()

int adcxx1c_get_and_clear_alert

(

const adcxx1c_t *

dev

)

Get alert source and clear it.

Parameters

[in,out]

dev

device descriptor

Returns

a combination of ADCXX1C_ALERT_OVER_RANGE and ADCXX1C_ALERT_UNDER_RANGE on success

negative error code on error

adcxx1c_init()

int adcxx1c_init	(	adcxx1c_t *	dev,
		const adcxx1c_params_t *	params
	)

Initialize an ADCxx1C ADC device.

Parameters

[in,out]	dev	device descriptor
[in]	params	device configuration

Returns

zero on successful initialization, non zero on error

adcxx1c_read_raw()

int adcxx1c_read_raw	(	const adcxx1c_t *	dev,
		int16_t *	raw
	)

Read a raw ADC value.

Parameters

[in]	dev	device descriptor
[out]	raw	read value

Returns

zero on successful read, non zero on error

adcxx1c_set_alert_parameters()

int adcxx1c_set_alert_parameters	(	const adcxx1c_t *	dev,
		int16_t	low_limit,
		int16_t	high_limit,
		int16_t	hysteresis
	)

Set the alert parameters.

Parameters

[in,out]	dev	device descriptor
[in]	low_limit	alert low limit
[in]	high_limit	alert high limit
[in]	hysteresis	alert hysteresis

Returns

zero on success, non zero on error