API for the CJQ4435 MOSFET. More...

Detailed Description

ID: cjq4435
Name: MOSFET
Other Names: CJQ4435
Category: electric
Manufacturer: seeed
Connection: gpio pwm
Kit: robok

UPM module for the CJQ4435 MOSFET. It was developed using the Grove MOSFET module, but could be used with any MOSFET. A MOSFET is like a switch, but it can switch much faster than a mechanical relay. Here, we implement support via MRAA pulse width modulation (PWM) functions. Note: available periods vary depending on the capabilities of your platform.

    // Instantiate a CJQ4435 MOSFET on a PWM capable digital pin D3
    upm::CJQ4435* mosfet = new upm::CJQ4435(3);
    mosfet->setPeriodMS(10);
    mosfet->enable(true);
    while (shouldRun)
    {
        // start with a duty cycle of 0.0 (off) and increment to 1.0 (on)
        for (float i=0.0; i <= 1.0; i+=0.1)
        {
            mosfet->setDutyCycle(i);
            usleep(100000);
        }
        sleep(1);
        // Now take it back down
        // start with a duty cycle of 1.0 (on) and decrement to 0.0 (off)
        for (float i=1.0; i >= 0.0; i-=0.1)
        {
            mosfet->setDutyCycle(i);
            usleep(100000);
        }
        sleep(1);
    }

Public Member Functions
	CJQ4435 (int pin)

	~CJQ4435 ()

void	setPeriodUS (int us)

void	setPeriodMS (int ms)

void	setPeriodSeconds (float seconds)

void	enable (bool enable)

void	setDutyCycle (float dutyCycle)

void	on ()

void	off ()

Protected Attributes
cjq4435_context	m_cjq4435

Constructor & Destructor Documentation

CJQ4435 ( int pin )

CJQ4435 constructor

Parameters

pin	Digital pin to use; this pin must be PWM-capable

~CJQ4435 ( )

CJQ4435 destructor

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Member Function Documentation

void setPeriodUS ( int us )

Sets a period in microseconds

Parameters

us	Period in microseconds

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void setPeriodMS ( int ms )

Sets a period in milliseconds

Parameters

ms	Period in milliseconds

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void setPeriodSeconds ( float seconds )

Sets a period in seconds

Parameters

seconds Period in seconds

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void enable ( bool enable )

Enables output

Parameters

enable Enables PWM output if true, disables otherwise

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void setDutyCycle ( float dutyCycle )

Sets a duty cycle. Duty cycle is a floating-point number between 0.0 (always off) and 1.0 (always on). It represents a proportion of time, per period, during which the output is driven high.

Parameters

dutyCycle Duty cycle to use

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