Add a small LED interface and demo app.

app/dartino/main.c

Index: app/dartino/main.c
diff --git a/app/dartino/main.c b/app/dartino/main.c
index 44df2a42bdd733129069e7310d554025dfbfbe71..27005aa6768a83f614a498fce59d313e1dd6ec21 100644
--- a/app/dartino/main.c
+++ b/app/dartino/main.c
@@ -33,6 +33,8 @@
 
 void SensorsInit(void);
 
+int change_led_status(int, int);
+
 enum {
   MODE_RUN,
   MODE_BURN
@@ -78,6 +80,7 @@ DARTINO_EXPORT_TABLE_ENTRY("gfx_flush", gfx_flush)
 DARTINO_EXPORT_TABLE_ENTRY("port_open", port_open)
 DARTINO_EXPORT_TABLE_ENTRY("port_close", port_open)
 DARTINO_EXPORT_TABLE_ENTRY("port_read", port_read)
+DARTINO_EXPORT_TABLE_ENTRY("led_toggle", change_led_status)

[Søren Gjesse, 2016/02/09 09:16:01]

Why is is called led_toggle when exported? Wouldn't set_led_state be more
precise (maybe use that name for the actual C function as well.

[herhut, 2016/02/09 10:10:15]

Because it is so long and these turn into strings :)

I've changed it...

 DARTINO_EXPORT_TABLE_END
 
 //////////////// Port debug ///////////////////////////////////////////////////