main.cpp

00001 /** Dragonfly InterruptIn Example Program
00002  *
00003  * This program demonstrates how to handle external interrupts using the
00004  * MultiTech Dragonfly and MultiTech UDK2 hardware. The only
00005  * additional hardware required is a jumper wire.
00006  *
00007  * Pins are active low, so 0V = 0 and 5V/3.3V = 1.
00008  *
00009  * This program configures interrupt handlers for rising and falling edges
00010  * on pin D9.
00011  */
00012  
00013 #include "mbed.h"
00014 
00015 // This line controls the regulator's battery charger.
00016 // BC_NCE = 0 enables the battery charger
00017 // BC_NCE = 1 disables the battery charger
00018 DigitalOut bc_nce(PB_2);
00019 
00020 bool rise_flag = false;
00021 bool fall_flag = false;
00022 
00023 void rise_handler(void) {
00024     rise_flag = true;
00025 }
00026 
00027 void fall_handler(void) {
00028     fall_flag = true;
00029 }
00030  
00031 int main() {
00032     // Disable the battery charger unless a battery is attached.
00033     bc_nce = 1;
00034     
00035     InterruptIn in(D9);
00036     in.rise(&rise_handler);
00037     in.fall(&fall_handler);
00038     
00039     while (true) {
00040         if (rise_flag) {
00041             printf("rising edge\r\n");
00042             rise_flag = false;
00043         }
00044         if (fall_flag) {
00045             printf("falling edge\r\n");
00046             fall_flag = false;
00047         }
00048         
00049         wait_ms(100);
00050     }
00051 }