Program pulses the board LED from 0% to 100% and back using soft PWM. Tested on Nucleo F030R8.

Dependencies:   mbed

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Show/hide line numbers main.cpp Source File

main.cpp

00001 #include "mbed.h"
00002 
00003 #define PWM_STEPS   100
00004 #define PWM_SPEED   50
00005 #define LED_ON      1
00006 #define LED_OFF     0
00007 
00008 DigitalOut myled(LED1);
00009 
00010 void blink_led(int from, int to) 
00011 {
00012     for (int i = 0; i < PWM_STEPS; i++) { 
00013         myled = from;
00014         wait_us(i * PWM_SPEED);
00015         
00016         myled = to;
00017         wait_us((PWM_STEPS - i) * PWM_SPEED);
00018     }
00019 }
00020 
00021 int main() {
00022     while (1) {    
00023         blink_led(LED_ON, LED_OFF);
00024         blink_led(LED_OFF, LED_ON);
00025     }
00026 }