Frank Vannieuwkerke / Mbed 2 deprecated DemoClass

Sample code on how to pass an optional function pointer to a library and set a single pin to either InterruptIn or DigitalOut.

Dependencies:   mbed

This code can be used as a template to create a library where a single pin can be set to either InterruptIn or DigitalOut.
There are 3 ways to instantiate the library (example using the KL25Z board):

// 2 parameters : Only SDA and SCL are declared.
DemoClass sensor(PTE0, PTE1);

// 3 parameters : SDA, SCL and a DigitalOut are declared.
DemoClass sensor(PTE0, PTE1, PTD7);               // SDA, SCL

// 4 parameters : SDA, SCL, InterruptIn and a user function pointer are declared.
DemoClass sensor(PTE0, PTE1, PTD7, &sensor_irq);       // ISR mode

Notice that the 3rd pin declaration switches from DigitalOut to InterruptIn when the user function pointer is added.

DemoClass/DemoClass.h

Committer:
frankvnk
Date:
2014-05-03
Revision:
0:0a6e921b085b

File content as of revision 0:0a6e921b085b:

#ifndef DemoClass_H
#define DemoClass_H

#include "mbed.h"

class DemoClass {
public:
    /**
     *  \brief Create an object connected to I2C bus, irq input or digital output and user-ISR.
     *  \param sda       SDA pin.
     *  \param scl       SCL pin.
     *  \param irqsync   Interrupt input when called with user-ISR pointer.
     *                   Digital output when called without user-ISR pointer.
     *  \param fptr      Pointer to user-ISR.
     *  \return none
     */

    DemoClass(PinName sda, PinName scl, PinName irqsync = NC, void (*fptr)(void) = NULL);

    /**
     *  \brief Example status function.
     *  \param none.
     *  \return Always 1.
     */
    bool Status(void);

private:
    I2C _i2c;
    FunctionPointer _fptr;
    void _sensorISR(void);
};

#endif