Files
file	hitechnic-pir.h
	HiTechnic PIR Sensor Driver.
Defines
#define	HTPIR_I2C_ADDR 0x02
#define	HTPIR_DEADBAND 0x41
#define	HTPIR_READING 0x42
#define	HTPIR_DEFAULT_DEADBAND 12
Functions
bool	HTPIRsetDeadband (tSensors link, int deadband)
int	HTPIRreadSensor (tSensors link)
int	HTPIRreadSensor (tMUXSensor muxsensor)
Variables
tConfigParams	HTPIR_config = {HTSMUX_CHAN_I2C, 1, 0x02, 0x42}
tByteArray	HTPIR_I2CRequest
tByteArray	HTPIR_I2CReply

Detailed Description

HiTechnic PIR Sensor

Define Documentation

#define HTPIR_DEADBAND 0x41

HTPIR Mode control

Definition at line 38 of file hitechnic-pir.h.

#define HTPIR_DEFAULT_DEADBAND 12

Examples:: hitechnic-pir-test1.c.

Definition at line 41 of file hitechnic-pir.h.

#define HTPIR_I2C_ADDR 0x02

HTPIR I2C device address

Definition at line 37 of file hitechnic-pir.h.

#define HTPIR_READING 0x42

HTPIR Heading Upper bits

Definition at line 39 of file hitechnic-pir.h.

Function Documentation

int HTPIRreadSensor ( tSensors link )

Read the current levels detected by the sensor

Parameters:

link	the HTPIR port number

Returns:: level detected by sensor, will be between -128 and 127.

Examples:: hitechnic-pir-test1.c.

Definition at line 88 of file hitechnic-pir.h.

int HTPIRreadSensor ( tMUXSensor muxsensor )

Read the current levels detected by the sensor

Parameters:

muxsensor the SMUX sensor port number

Returns:: level detected by sensor, will be between -128 and 127.

Definition at line 107 of file hitechnic-pir.h.

bool HTPIRsetDeadband	(	tSensors	link,
		int	deadband
	)

The sensor element with the PIR sensor generates continuous noise. The size of the deadband is set to minimize the number of false detections which will be reported by the sensor. If the deadband value is too small, some of the noise fluctuations will exceed the deadband threshold and will appear as actual non-zero readings.
The Deadband field may be set from 0 to 47 to define the half width of the deadband. The default value is 12.

Parameters: