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// Toggles the built-in LED when the built in button
// on the Maple is pushed in. This uses the attachInterrupt function to
// setup the interrupt handler for the button being pressed.
//
// More about attachInterrupt:
// http://leaflabs.com/docs/lang/api/attachinterrupt.html
//
#include <wirish/wirish.h>
// LED is off by default
bool isLEDOn = false;
// Interrupt handler takes in nothing and returns nothing.
void interruptHandler() {
// Set LED
isLEDOn = !isLEDOn;
digitalWrite(BOARD_LED_PIN, isLEDOn);
// Delay slightly for switch debouncing.
delay(20);
}
// Setup pin modes and the interrupt handler
void setup() {
pinMode(BOARD_BUTTON_PIN, INPUT);
pinMode(BOARD_LED_PIN, OUTPUT);
attachInterrupt(BOARD_BUTTON_PIN, interruptHandler, RISING);
}
// Loop. Does nothing in this example.
void loop() {
}
// Force init to be called *first*, i.e. before static object allocation.
// Otherwise, statically allocated objects that need libmaple may fail.
__attribute__((constructor)) void premain() {
init();
}
int main(void) {
setup();
while (true) {
loop();
}
return 0;
}
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