Diff: main.cpp

Revision:

0:90f7dbc52b88

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Jan 28 09:23:17 2020 +0000
@@ -0,0 +1,60 @@
+#include "mbed.h"
+
+Thread ledThread;
+DigitalOut led(LED2);
+Serial serialPC(USBTX, USBRX, 9600);
+Mutex dutyCycleMutex;
+
+const int period = 20; // ms
+int dutyCycle = 50; // %
+
+
+void ledOutput()
+{
+    while(true)
+    {
+        if(dutyCycle != 0)
+        {
+            dutyCycleMutex.lock();
+            float onTime = (dutyCycle / 100.0f) * period;
+            dutyCycleMutex.unlock();
+            
+            led = 1;
+            ThisThread::sleep_for(onTime);
+            led = 0;
+            ThisThread::sleep_for(period - onTime);
+        }
+    }
+}
+
+int main()
+{
+    ledThread.start(ledOutput);
+    
+    while(true)
+    {
+        dutyCycleMutex.lock();
+        serialPC.printf("Duty: %d\n", dutyCycle);
+        dutyCycleMutex.unlock();
+        char currentChar = serialPC.getc();
+        
+        if(currentChar == 'Z')
+        {
+            dutyCycleMutex.lock();
+            dutyCycle = 0;
+            dutyCycleMutex.unlock();
+        }
+        else if(currentChar >= '1' && currentChar <= '9')
+        {
+            dutyCycleMutex.lock();
+            dutyCycle = (currentChar - '0') * 10;
+            dutyCycleMutex.unlock();
+        }
+        else if(currentChar == 'F')
+        {
+            dutyCycleMutex.lock();
+            dutyCycle = 100;
+            dutyCycleMutex.unlock();
+        }
+    }
+}