Christian Dupaty / Mbed 2 deprecated Nucleo_pwm_LED_light_control

Control the intensity of a single LED ( in series with 50 ohms) on PA_10

Dependencies:   mbed

main.cpp@0:baf22868bfcf, 2015-03-19 (annotated)

Committer:
cdupaty
Date:
Thu Mar 19 10:05:36 2015 +0000
Revision:
0:baf22868bfcf
A PWM LED light control

Who changed what in which revision?

UserRevisionLine numberNew contents of line
cdupaty 0:baf22868bfcf 1 #include "mbed.h"
cdupaty 0:baf22868bfcf 2
cdupaty 0:baf22868bfcf 3 #define per 0.001
cdupaty 0:baf22868bfcf 4 #define delta 0.0001
cdupaty 0:baf22868bfcf 5
cdupaty 0:baf22868bfcf 6 PwmOut ledpwm(PA_10);
cdupaty 0:baf22868bfcf 7
cdupaty 0:baf22868bfcf 8
cdupaty 0:baf22868bfcf 9 int main() {
cdupaty 0:baf22868bfcf 10 float w=0;
cdupaty 0:baf22868bfcf 11 int sens=0;
cdupaty 0:baf22868bfcf 12 ledpwm.period(per);
cdupaty 0:baf22868bfcf 13 ledpwm.pulsewidth(delta);
cdupaty 0:baf22868bfcf 14 while(1) {
cdupaty 0:baf22868bfcf 15 if (sens) {
cdupaty 0:baf22868bfcf 16 w+=delta;
cdupaty 0:baf22868bfcf 17 if (w>=per) sens=0;
cdupaty 0:baf22868bfcf 18 }
cdupaty 0:baf22868bfcf 19 else {
cdupaty 0:baf22868bfcf 20 w-=delta;
cdupaty 0:baf22868bfcf 21 if (w<=0) sens=1;
cdupaty 0:baf22868bfcf 22 }
cdupaty 0:baf22868bfcf 23 wait(0.04);
cdupaty 0:baf22868bfcf 24 ledpwm.pulsewidth(w);
cdupaty 0:baf22868bfcf 25 printf("pwm est de %.2f %%\n\r", ledpwm.read() * 100);
cdupaty 0:baf22868bfcf 26 }
cdupaty 0:baf22868bfcf 27 }