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Plays WAV file
main.cpp
- Committer:
- eencae
- Date:
- 2016-01-05
- Revision:
- 1:39d8765b574d
- Parent:
- 0:44597d36d45c
- Child:
- 2:7d65a185f9a4
File content as of revision 1:39d8765b574d:
/* 2645_Ticker Sample code from ELEC2645 Week 15 Lab Demonstrates how to use a ticker to generate a periodic timer interrupt (c) Craig A. Evans, University of Leeds, Jan 2016 */ #include "mbed.h" // Create objects for ticker and red LED Ticker ticker; DigitalOut red_led(LED_RED); // flag - must be volatile as changes within ISR // g_ prefix makes it easier to distinguish it as global volatile int g_timer_flag = 0; // function prototypes void timer_isr(); int main() { // set-up the ticker so that the ISR it is called every 0.5 seconds ticker.attach(&timer_isr,0.5); // the on-board RGB LED is a common anode - writing a 1 to the pin will turn the LED OFF red_led = 1; while (1) { // check if flag is set i.e. interrupt has occured if (g_timer_flag) { g_timer_flag = 0; // if it has, clear the flag // DO TASK HERE } // put the MCU to sleep until an interrupt wakes it up sleep(); } } // time-triggered interrupt void timer_isr() { g_timer_flag = 1; // set flag in ISR }