Hsing-Hung Lai
homework_1
Diff: main.cpp
- Revision:
- 0:5e39cd6c5291
diff -r 000000000000 -r 5e39cd6c5291 main.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Thu Mar 10 14:05:44 2016 +0000
@@ -0,0 +1,44 @@
+/*LAB_LED*/
+#include "mbed.h"
+
+//LED1 = D13 = PA_5 (LED on Nucleo board)
+
+DigitalOut led1(LED1);
+Ticker timer1;
+
+int a;
+
+void init_IO(void)
+{
+ a = 0;
+ led1 = 0;
+}
+
+void timer1_interrupt(void)
+{
+ a = a+1;
+}
+
+void init_TIMER(void)
+{
+ timer1.attach_us(&timer1_interrupt, 1000.0);//1ms interrupt period (1 KHz)
+}
+
+int main()
+{
+
+ init_IO();
+ init_TIMER();
+
+ while(1) {
+
+ if (a==500) {
+ led1 = 1;
+ }
+
+ if(a==1000) {
+ led1 = 0;
+ a = 0;
+ }
+ }
+}
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