Daiki Morita / Mbed 2 deprecated 1136

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Dependencies:   mbed

main.cpp@0:d04469a1b180, 2019-05-06 (annotated)

Committer:
daikinect
Date:
Mon May 06 00:20:37 2019 +0000
Revision:
0:d04469a1b180
all publish

Who changed what in which revision?

UserRevisionLine numberNew contents of line
daikinect 0:d04469a1b180 1 #include "mbed.h"
daikinect 0:d04469a1b180 2
daikinect 0:d04469a1b180 3 Timeout timer;
daikinect 0:d04469a1b180 4 DigitalOut my_led(LED1);
daikinect 0:d04469a1b180 5 DigitalOut my_pwm(D10); // IO used by pwm_io function
daikinect 0:d04469a1b180 6
daikinect 0:d04469a1b180 7 int on_delay = 0;
daikinect 0:d04469a1b180 8 int off_delay = 0;
daikinect 0:d04469a1b180 9
daikinect 0:d04469a1b180 10 void toggleOff(void);
daikinect 0:d04469a1b180 11
daikinect 0:d04469a1b180 12 void toggleOn(void) {
daikinect 0:d04469a1b180 13 my_pwm = 1;
daikinect 0:d04469a1b180 14 timer.attach_us(toggleOff, on_delay);
daikinect 0:d04469a1b180 15 }
daikinect 0:d04469a1b180 16
daikinect 0:d04469a1b180 17 void toggleOff(void) {
daikinect 0:d04469a1b180 18 my_pwm = 0;
daikinect 0:d04469a1b180 19 timer.attach_us(toggleOn, off_delay);
daikinect 0:d04469a1b180 20 }
daikinect 0:d04469a1b180 21
daikinect 0:d04469a1b180 22 // p_us = signal period in micro_seconds
daikinect 0:d04469a1b180 23 // dc = signal duty-cycle (0.0 to 1.0)
daikinect 0:d04469a1b180 24 void pwm_io(int p_us, float dc) {
daikinect 0:d04469a1b180 25 timer.detach();
daikinect 0:d04469a1b180 26 if ((p_us == 0) || (dc == 0)) {
daikinect 0:d04469a1b180 27 my_pwm = 0;
daikinect 0:d04469a1b180 28 return;
daikinect 0:d04469a1b180 29 }
daikinect 0:d04469a1b180 30 if (dc >= 1) {
daikinect 0:d04469a1b180 31 my_pwm = 1;
daikinect 0:d04469a1b180 32 return;
daikinect 0:d04469a1b180 33 }
daikinect 0:d04469a1b180 34 on_delay = (int)(p_us * dc);
daikinect 0:d04469a1b180 35 off_delay = p_us - on_delay;
daikinect 0:d04469a1b180 36 toggleOn();
daikinect 0:d04469a1b180 37 }
daikinect 0:d04469a1b180 38
daikinect 0:d04469a1b180 39 int main() {
daikinect 0:d04469a1b180 40
daikinect 0:d04469a1b180 41 pwm_io(20000, 0.25); // 20ms - 25%
daikinect 0:d04469a1b180 42
daikinect 0:d04469a1b180 43 while(1) {
daikinect 0:d04469a1b180 44 my_led = !my_led;
daikinect 0:d04469a1b180 45 wait(0.5);
daikinect 0:d04469a1b180 46 }
daikinect 0:d04469a1b180 47 }
daikinect 0:d04469a1b180 48