Kevin Pinto / Mbed 2 deprecated Fan_Control

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

Dependencies:   PwmIn mbed

Diff: main.cpp

Revision:
0:d111bbbfd9e2
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu May 02 10:31:56 2019 +0000
@@ -0,0 +1,31 @@
+// STM32L432KC
+// https://os.mbed.com/platforms/ST-Nucleo-L432KC/
+
+
+#include "mbed.h"
+#include "PwmIn.h"
+
+#define PWM_FAN_1       D9
+#define TACHO_FAN_1     D11
+
+#define PWM_FREQUENCY   25000
+#define DUTY_CYCLE      50
+
+PwmOut  mypwm1(PWM_FAN_1);
+
+PwmIn   tacho1(TACHO_FAN_1);
+
+int main() {
+    
+    //PWM period
+
+    mypwm1.period_us((int) (PWM_FREQUENCY/25));
+    mypwm1.pulsewidth_us((int)(PWM_FREQUENCY*DUTY_CYCLE/100));       // Not lower than 10 us
+  
+    printf("PWM Duty is set to %.2f %%\n", mypwm1.read() * 100);
+    float speed1;
+    while(1) {
+        speed1 = tacho1.period() * 1000;
+        printf("Speed: %f\n",speed1);
+    }
+}