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@0:0a6e921b085b, 2014-05-03 (annotated)

Committer:
frankvnk
Date:
Sat May 03 16:15:38 2014 +0000
Revision:
0:0a6e921b085b
Initial release

Who changed what in which revision?

UserRevisionLine numberNew contents of line
frankvnk 0:0a6e921b085b 1 #include "mbed.h"
frankvnk 0:0a6e921b085b 2 #include "DemoClass.h"
frankvnk 0:0a6e921b085b 3
frankvnk 0:0a6e921b085b 4 bool Overflow = 0;
frankvnk 0:0a6e921b085b 5
frankvnk 0:0a6e921b085b 6 // Forward declaration of the user-ISR
frankvnk 0:0a6e921b085b 7 void sensor_irq(void);
frankvnk 0:0a6e921b085b 8
frankvnk 0:0a6e921b085b 9 // 3 possible constructor calls (current example uses KL25Z pins)
frankvnk 0:0a6e921b085b 10 //DemoClass sensor(PTE0, PTE1); // Free running mode
frankvnk 0:0a6e921b085b 11 //DemoClass sensor(PTE0, PTE1, PTD7); // Sync mode
frankvnk 0:0a6e921b085b 12 DemoClass sensor(PTE0, PTE1, PTD7, &sensor_irq); // ISR mode
frankvnk 0:0a6e921b085b 13
frankvnk 0:0a6e921b085b 14 void sensor_irq(void)
frankvnk 0:0a6e921b085b 15 {
frankvnk 0:0a6e921b085b 16 Overflow = 1;
frankvnk 0:0a6e921b085b 17 }
frankvnk 0:0a6e921b085b 18
frankvnk 0:0a6e921b085b 19 int main()
frankvnk 0:0a6e921b085b 20 {
frankvnk 0:0a6e921b085b 21 while(1)
frankvnk 0:0a6e921b085b 22 if(Overflow) Overflow = 0;
frankvnk 0:0a6e921b085b 23 }