Revision 0:d5bbef547b76, committed 2019-11-14

Comitter:

malyuskin

Date:

Thu Nov 14 22:01:13 2019 +0000

Commit message:

LED lamp with full control - interrupt-based switch, Analog In and PWM out

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Nov 14 22:01:13 2019 +0000
@@ -0,0 +1,49 @@
+#include "mbed.h"
+InterruptIn button(A2);
+AnalogIn analog_value(A0);
+PwmOut ledpwm(A6);
+
+
+volatile bool state = 0; //initially lamp is OFF state is 0
+ 
+void flip() {
+    state = !state; }
+   
+int main() {
+    button.rise(&flip);  // attach the address of the flip function to the rising edge
+
+float meas_r;  // measured analog voltage on pin A0
+
+     
+        while(1) {           // wait around, interrupts will interrupt this!
+        
+        if (state==1){ //lamp is ON
+           //...   we can control brightness here using AnalogIn 
+          
+          ledpwm.period_ms(10);  // PWM period is 10ms
+           
+           meas_r = analog_value.read();  
+           
+           if (meas_r<0.1) {ledpwm.write(0.1);} // this is done to have led ON even when 
+                                                // voltage on analogIn A2 is 0
+           else  ledpwm.write(meas_r);
+          
+                        }
+       
+        else { 
+             //lamp is OFF
+            //...   set PWM to 0
+            
+            ledpwm.period_ms(10);  // PWM period is 10ms
+            ledpwm.write(0.0);
+            
+            }
+               wait(0.2);     }
+}
+
+
+
+
+
+
+

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Thu Nov 14 22:01:13 2019 +0000
@@ -0,0 +1,1 @@
+https://os.mbed.com/users/mbed_official/code/mbed/builds/65be27845400
\ No newline at end of file