Lei Lei
/
AUP_Lab2_PWM_UART
Important changes to repositories hosted on mbed.com
Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.
To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.
It is also possible to export all your personal repositories from the account settings page.
Fork of
Lab2_PWM_UART
by 
璇 李
Diff: main.cpp
- Revision:
- 0:65e58765adf7
- Child:
- 1:08431d9e3d95
--- /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
+ }
+}