M BERNSTEIN
Blinky LED for STM32F401 - replacement candidate for application shipped with board - uses <Timer.h> to seed pseudo-random number generator so that the blink sequence varies between incarnations.
Revision 0:42458802c36f, committed 2014-05-20
- Comitter:
- nucleo
- Date:
- Tue May 20 00:47:38 2014 +0000
- Commit message:
- Blinky LED for STM32F401 - replacement candidate for application shipped with board - uses <Timer.h> to seed pseudo-random number generator so that the blink sequence varies between incarnations.
Changed in this revision
| main.cpp | Show annotated file Show diff for this revision Revisions of this file |
| mbed.bld | Show annotated file Show diff for this revision Revisions of this file |
diff -r 000000000000 -r 42458802c36f main.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Tue May 20 00:47:38 2014 +0000
@@ -0,0 +1,27 @@
+#include "mbed.h"
+#include "stdlib.h"
+#include <Timer.h>
+
+InterruptIn mybutton(PC_13); // B1
+
+DigitalOut myled(LED1);
+
+double multiplier = 500.0; // maximum on-off time in milliseconds
+Timer timer;
+
+
+int delay = 500; // initial on-off time in milliseconds
+
+void random_on_off() {
+ srand(unsigned(timer.read_ms()% RAND_MAX));
+ delay = int(multiplier * float(rand()) / RAND_MAX);
+ }
+
+int main() {
+ timer.start();
+ while(1) {
+ myled = !myled;
+ mybutton.fall(&random_on_off);
+ wait_ms(delay);
+ }
+ }
\ No newline at end of file
diff -r 000000000000 -r 42458802c36f mbed.bld --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Tue May 20 00:47:38 2014 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/0b3ab51c8877 \ No newline at end of file