HCSR04 Class Reference

C++ API for HCSR04 (ultrasonic ranging module) component. More...

Detailed Description

• ID: hcsr04
• Name: HCSR04 Ultrasonic Sensor
• Category: sound
• Manufacturer: generic
• Connection: gpio

This file defines the HCSR04 C++ interface for libhcsr04

void
interrupt (void * args) {
    sonar->ackEdgeDetected ();
}

int
main(int argc, char **argv)
{
    sonar = new upm::HCSR04(5, 7, &interrupt);
    signal(SIGINT, sig_handler);

    printf ("width = %d\n", sonar->getDistance());
    std::cout << "exiting application" << std::endl;

    delete sonar;

    return 0;
}

Public Member Functions
	HCSR04 (uint8_t triggerPin, uint8_t echoPin, void(*fptr)(void *))
	~HCSR04 ()
int	getDistance ()
void	ackEdgeDetected ()
std::string	name ()

Data Fields
uint8_t	m_doWork

Constructor & Destructor Documentation

HCSR04	(	uint8_t	triggerPin,
		uint8_t	echoPin,
		void(*)(void *)	fptr
	)

Instanciates a HCSR04 object

Parameters

triggerPin	pin for triggering the sensor for distance
echoPin	pulse response to triggering
fptr	function pointer for handling raising and falling interrupts

~HCSR04

(

)

HCSR04 object destructor.

Member Function Documentation

int getDistance

(

)

Get the distance from the sensor.

void ackEdgeDetected

(

)

On each interrupt this function will detect if the interrupt was falling edge or rising. Should be called from the interrupt handler.

std::string name ( )

inline

Return name of the component

Field Documentation

uint8_t m_doWork

Flag to controll blocking function while waiting for falling edge interrupt

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The documentation for this class was generated from the following files:

• /var/lib/jenkins/workspace/upm-doc-stable/src/hcsr04/hcsr04.h
• /var/lib/jenkins/workspace/upm-doc-stable/src/hcsr04/hcsr04.cxx