璇 李 / Mbed 2 deprecated Lab2_PWM_UART

AUP Xi'an Lab2

Dependencies:   mbed

main.cpp@0:65e58765adf7, 2015-05-21 (annotated)

Committer:
gyth
Date:
Thu May 21 02:23:19 2015 +0000
Revision:
0:65e58765adf7
AUP Xi'an Lab2

Who changed what in which revision?

UserRevisionLine numberNew contents of line
gyth 0:65e58765adf7 1 #include "mbed.h"
gyth 0:65e58765adf7 2
gyth 0:65e58765adf7 3 PwmOut led(D5);
gyth 0:65e58765adf7 4 DigitalIn button_up(A2);
gyth 0:65e58765adf7 5 DigitalIn button_center(D4);
gyth 0:65e58765adf7 6 DigitalIn button_down(A3);
gyth 0:65e58765adf7 7 Serial pc(SERIAL_TX, SERIAL_RX);
gyth 0:65e58765adf7 8
gyth 0:65e58765adf7 9 double brightness = 1.0;
gyth 0:65e58765adf7 10 double brightness_inc = 0.1;
gyth 0:65e58765adf7 11
gyth 0:65e58765adf7 12 int main()
gyth 0:65e58765adf7 13 {
gyth 0:65e58765adf7 14 int bt_flag = 0;
gyth 0:65e58765adf7 15 pc.baud(9600);
gyth 0:65e58765adf7 16 pc.printf("Hello PWM!\r\n");
gyth 0:65e58765adf7 17 // Set PWM
gyth 0:65e58765adf7 18 led.write(brightness);
gyth 0:65e58765adf7 19
gyth 0:65e58765adf7 20 while (1) {
gyth 0:65e58765adf7 21 bt_flag = 1;
gyth 0:65e58765adf7 22 if(button_up==1)
gyth 0:65e58765adf7 23 brightness -= brightness_inc;
gyth 0:65e58765adf7 24 else if(button_down==1)
gyth 0:65e58765adf7 25 brightness += brightness_inc;
gyth 0:65e58765adf7 26 else if(button_center==1)
gyth 0:65e58765adf7 27 brightness = (brightness>0.5)?1.0:0.0;
gyth 0:65e58765adf7 28 else
gyth 0:65e58765adf7 29 bt_flag = 0;
gyth 0:65e58765adf7 30 if(bt_flag==1)
gyth 0:65e58765adf7 31 {
gyth 0:65e58765adf7 32 brightness = (brightness>1.0)?0.0:brightness;
gyth 0:65e58765adf7 33 brightness = (brightness<0.0)?1.0:brightness;
gyth 0:65e58765adf7 34 led.write(brightness);
gyth 0:65e58765adf7 35 pc.printf("Brightness = %.1f\r\n", 1.0-brightness);
gyth 0:65e58765adf7 36 }
gyth 0:65e58765adf7 37 wait(0.2); // 200 ms
gyth 0:65e58765adf7 38 }
gyth 0:65e58765adf7 39 }