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.

main.cpp

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

File content as of revision 0:0a6e921b085b:

#include "mbed.h"
#include "DemoClass.h"

bool Overflow = 0;

// Forward declaration of the user-ISR
void sensor_irq(void);

// 3 possible constructor calls (current example uses KL25Z pins)
//DemoClass sensor(PTE0, PTE1);                          // Free running mode
//DemoClass sensor(PTE0, PTE1, PTD7);                    // Sync mode
DemoClass sensor(PTE0, PTE1, PTD7, &sensor_irq);       // ISR mode

void sensor_irq(void)
{
    Overflow = 1;
}

int main()
{
    while(1)
        if(Overflow) Overflow = 0;
}