Diff: main.cpp

Revision:

0:65e58765adf7

Child:

1:08431d9e3d95

diff -r 000000000000 -r 65e58765adf7 main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu May 21 02:23:19 2015 +0000
@@ -0,0 +1,39 @@
+#include "mbed.h"
+
+PwmOut led(D5);
+DigitalIn button_up(A2);
+DigitalIn button_center(D4);
+DigitalIn button_down(A3);
+Serial pc(SERIAL_TX, SERIAL_RX);
+
+double brightness = 1.0;
+double brightness_inc = 0.1;
+
+int main()
+{
+    int bt_flag = 0;
+    pc.baud(9600);
+    pc.printf("Hello PWM!\r\n");
+    // Set PWM
+    led.write(brightness);
+
+    while (1) {
+        bt_flag = 1;
+        if(button_up==1)
+            brightness -= brightness_inc;
+        else if(button_down==1)
+            brightness += brightness_inc;
+        else if(button_center==1)
+            brightness = (brightness>0.5)?1.0:0.0;
+        else
+            bt_flag = 0;
+        if(bt_flag==1)
+        {
+            brightness = (brightness>1.0)?0.0:brightness;
+            brightness = (brightness<0.0)?1.0:brightness;
+            led.write(brightness);
+            pc.printf("Brightness = %.1f\r\n", 1.0-brightness);
+        }
+        wait(0.2); // 200 ms
+    }
+}