Hugo Pristauz
Tutorial 2 - SOS: This is an embedded program which controls LED1 in order to show a blinking SOS pattern. The tutorial starts to organize helper functions like "morse" in a brick library which will grow and grow with each tutorial. Platform specifics are identified in "bricks/platform.h" by setting proper defines (like LED_INVERTED), which are used to achieve platform independent behaviour. The program has been tested on Nordic nRF51-DK and STM NUCLEO-F303K8, NUCLEO-F401RE and NUCLEO-L476RG.
Diff: bricks/morse.cpp
- Revision:
- 0:9bbb539e0614
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/bricks/morse.cpp Thu Dec 08 08:07:23 2016 +0000
@@ -0,0 +1,20 @@
+// morse.cpp - send a morse pattern to LED1
+
+#include "bricks/platform.h"
+#include "bricks/morse.h"
+
+#ifdef NUCLEO
+# define LED_ON 0
+#else
+# define LED_ON 1
+#endif
+
+void morse(double periode, char *pattern)
+{
+ DigitalOut led(LED1);
+
+ while (*pattern) {
+ led = (*pattern++ == ' ') ? LED_ON : !LED_ON;
+ wait(periode);
+ }
+}
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