Kevin Pinto / Mbed 2 deprecated Fan_Control

Simple code to control 3 or 4 Wire Fans with tacho signal as feedback

Dependencies:   PwmIn mbed

main.cpp@0:d111bbbfd9e2, 2019-05-02 (annotated)

Committer:
kevinganhito
Date:
Thu May 02 10:31:56 2019 +0000
Revision:
0:d111bbbfd9e2
Fan Controller;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
kevinganhito 0:d111bbbfd9e2 1 // STM32L432KC
kevinganhito 0:d111bbbfd9e2 2 // https://os.mbed.com/platforms/ST-Nucleo-L432KC/
kevinganhito 0:d111bbbfd9e2 3
kevinganhito 0:d111bbbfd9e2 4
kevinganhito 0:d111bbbfd9e2 5 #include "mbed.h"
kevinganhito 0:d111bbbfd9e2 6 #include "PwmIn.h"
kevinganhito 0:d111bbbfd9e2 7
kevinganhito 0:d111bbbfd9e2 8 #define PWM_FAN_1 D9
kevinganhito 0:d111bbbfd9e2 9 #define TACHO_FAN_1 D11
kevinganhito 0:d111bbbfd9e2 10
kevinganhito 0:d111bbbfd9e2 11 #define PWM_FREQUENCY 25000
kevinganhito 0:d111bbbfd9e2 12 #define DUTY_CYCLE 50
kevinganhito 0:d111bbbfd9e2 13
kevinganhito 0:d111bbbfd9e2 14 PwmOut mypwm1(PWM_FAN_1);
kevinganhito 0:d111bbbfd9e2 15
kevinganhito 0:d111bbbfd9e2 16 PwmIn tacho1(TACHO_FAN_1);
kevinganhito 0:d111bbbfd9e2 17
kevinganhito 0:d111bbbfd9e2 18 int main() {
kevinganhito 0:d111bbbfd9e2 19
kevinganhito 0:d111bbbfd9e2 20 //PWM period
kevinganhito 0:d111bbbfd9e2 21
kevinganhito 0:d111bbbfd9e2 22 mypwm1.period_us((int) (PWM_FREQUENCY/25));
kevinganhito 0:d111bbbfd9e2 23 mypwm1.pulsewidth_us((int)(PWM_FREQUENCY*DUTY_CYCLE/100)); // Not lower than 10 us
kevinganhito 0:d111bbbfd9e2 24
kevinganhito 0:d111bbbfd9e2 25 printf("PWM Duty is set to %.2f %%\n", mypwm1.read() * 100);
kevinganhito 0:d111bbbfd9e2 26 float speed1;
kevinganhito 0:d111bbbfd9e2 27 while(1) {
kevinganhito 0:d111bbbfd9e2 28 speed1 = tacho1.period() * 1000;
kevinganhito 0:d111bbbfd9e2 29 printf("Speed: %f\n",speed1);
kevinganhito 0:d111bbbfd9e2 30 }
kevinganhito 0:d111bbbfd9e2 31 }