育瑄 張 / Mbed 2 deprecated Robotics_LED

LED flashing

Dependencies:   mbed

Fork of Robotics_LED by No.9 Robotics

main.cpp@0:bf4612a77210, 2016-02-29 (annotated)

Committer:
ChangYuHsuan
Date:
Mon Feb 29 15:39:36 2016 +0000
Revision:
0:bf4612a77210
Child:
1:d5cf0fdad0f1
2016/2/29; LED; Yu-Hsuan edited

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ChangYuHsuan 0:bf4612a77210 1 /*LAB_LED*/
ChangYuHsuan 0:bf4612a77210 2 #include "mbed.h"
ChangYuHsuan 0:bf4612a77210 3
ChangYuHsuan 0:bf4612a77210 4 #define LED_1 PA_5
ChangYuHsuan 0:bf4612a77210 5 #define LED_2 D12
ChangYuHsuan 0:bf4612a77210 6
ChangYuHsuan 0:bf4612a77210 7 DigitalOut led_1(LED_1);
ChangYuHsuan 0:bf4612a77210 8 DigitalOut led_2(LED_2);
ChangYuHsuan 0:bf4612a77210 9 Ticker timer_1;
ChangYuHsuan 0:bf4612a77210 10
ChangYuHsuan 0:bf4612a77210 11 int timer_1_counter;
ChangYuHsuan 0:bf4612a77210 12
ChangYuHsuan 0:bf4612a77210 13 void init_IO(void)
ChangYuHsuan 0:bf4612a77210 14 {
ChangYuHsuan 0:bf4612a77210 15 led_1 = 0;
ChangYuHsuan 0:bf4612a77210 16 led_2 = 0;
ChangYuHsuan 0:bf4612a77210 17
ChangYuHsuan 0:bf4612a77210 18 timer_1_counter = 0;
ChangYuHsuan 0:bf4612a77210 19 }
ChangYuHsuan 0:bf4612a77210 20
ChangYuHsuan 0:bf4612a77210 21 void timer_1_interrupt()
ChangYuHsuan 0:bf4612a77210 22 {
ChangYuHsuan 0:bf4612a77210 23 timer_1_counter += 1;
ChangYuHsuan 0:bf4612a77210 24 }
ChangYuHsuan 0:bf4612a77210 25
ChangYuHsuan 0:bf4612a77210 26 void init_TIMER(void)
ChangYuHsuan 0:bf4612a77210 27 {
ChangYuHsuan 0:bf4612a77210 28 timer_1.attach_us(&timer_1_interrupt, 1000.0);//1ms interrupt period (1 KHz)
ChangYuHsuan 0:bf4612a77210 29 }
ChangYuHsuan 0:bf4612a77210 30
ChangYuHsuan 0:bf4612a77210 31 int main()
ChangYuHsuan 0:bf4612a77210 32 {
ChangYuHsuan 0:bf4612a77210 33 init_IO();
ChangYuHsuan 0:bf4612a77210 34 init_TIMER();
ChangYuHsuan 0:bf4612a77210 35
ChangYuHsuan 0:bf4612a77210 36 while(1)
ChangYuHsuan 0:bf4612a77210 37 {
ChangYuHsuan 0:bf4612a77210 38 if(timer_1_counter == 1000)
ChangYuHsuan 0:bf4612a77210 39 {
ChangYuHsuan 0:bf4612a77210 40 // led_1 flashes
ChangYuHsuan 0:bf4612a77210 41 led_1 = 1;
ChangYuHsuan 0:bf4612a77210 42 wait_ms(1);
ChangYuHsuan 0:bf4612a77210 43 led1 = 0;
ChangYuHsuan 0:bf4612a77210 44
ChangYuHsuan 0:bf4612a77210 45 // reset timer_1_counter to zero
ChangYuHsuan 0:bf4612a77210 46 timer_1_counter = 0;
ChangYuHsuan 0:bf4612a77210 47 }
ChangYuHsuan 0:bf4612a77210 48 }
ChangYuHsuan 0:bf4612a77210 49 }