Revision 12:6a944faf5dd8, committed 2020-08-27

Comitter:

elelthvd

Date:

Thu Aug 27 16:15:27 2020 +0800

Parent:

11:759df8b71f32

Commit message:

Use "\r\n", add three other methods of blinking

Changed in this revision

--- a/main.cpp	Thu Aug 13 16:16:51 2020 +0800
+++ b/main.cpp	Thu Aug 27 16:15:27 2020 +0800
@@ -17,21 +17,81 @@
 
 DigitalOut myled(LED1);
 
+// For approach Three
+Ticker blinkticker;
+void blink()
+{
+    myled = !myled;
+    printf("myled = %d (blinkticker)\r\n", (uint8_t) myled );
+}
+
+// For approach Four: // A class for blink()-ing a DigitalOut
+class Blinker {
+public:
+    Blinker(PinName pin) : _pin(pin)
+    {
+        _pin = 0;
+    }
+    void blink()
+    {
+        _pin = !_pin;
+        printf("_pin = %d (Blinker::blink)\r\n", (uint8_t) _pin );
+    }
+private:
+    DigitalOut _pin;
+};
+Blinker myblinker(LED2);
+
+// For approach Five
+PwmOut mypwm(PWM_OUT);
+InterruptIn myint(D10); // Manually Wire D10 to PWM_OUT (D9)
+void blinkinterrupt()
+{
+    myled = !myled;
+    printf("myled = %d (blinkinterrupt)\r\n", (uint8_t) myled );
+}
+
 int main()
 {
     // check that myled object is initialized and connected to a pin
     if(myled.is_connected()) {
-        printf("myled is initialized and connected!\n\r");
+        printf("myled is initialized and connected!\r\n");
     }
 
     // Blink LED
-    while(1) {
+    for(int i=0; i<3; i++) {
+        
+        // one way
         myled = 1;          // set LED1 pin to high
-        printf("myled = %d \n\r", (uint8_t)myled );
+        printf("myled = %d (assign)\r\n", (uint8_t) myled );
         ThisThread::sleep_for(500ms);
 
+        // another method
         myled.write(0);     // set LED1 pin to low
-        printf("myled = %d \n\r",myled.read() );
+        printf("myled = %d (write())\r\n",myled.read() );
         ThisThread::sleep_for(500ms);
     }
+
+    // A third blinker
+    blinkticker.attach(&blink, 500ms); // call function every 500ms
+    ThisThread::sleep_for(2500ms); // Let the main thread rest ...
+    blinkticker.detach();
+
+    // A fourth blinker
+    // the address of the object, member function, and interval
+    blinkticker.attach(callback(&myblinker, &Blinker::blink), 500ms);
+    ThisThread::sleep_for(2500ms); // Let the main thread rest ...
+    blinkticker.detach();
+
+    // A fifth blinker
+    blinkinterrupt(); 		// Test function works
+    myint.rise(callback(&blinkinterrupt)); // Start listening on rise events
+    mypwm.period_ms(500);  // PWM period is 500ms
+    mypwm.write(0.5);      // Duty Cycle: 50% HIGH time.
+
+    printf("Good Bye.\r\n");
+    while (true) {
+        ThisThread::sleep_for(1h); // Zzz
+    }
+
 }