make the interval bisection work properly for events in the next hour, add an alarm output

1 files changed, 35 insertions, 0 deletions

diff --git a/app/alarm.c b/app/alarm.c
new file mode 100644
index 0000000..ed503db
--- /dev/null
+++ b/app/alarm.c
@@ -0,0 +1,35 @@
+#include "project.h"
+
+#define ALARM_LENGTH 30
+
+EPOCH alarm;
+
+static void alarm_off (void)
+{
+  led5_set (0);
+}
+
+
+static void alarm_on (void)
+{
+  led5_set (1);
+}
+
+
+
+void alarm_dispatch (void)
+{
+  uint64_t abs =  ref_get();
+  EPOCH d, e = ref_decompose (abs);
+
+  d = time_epoch_sub (e, alarm);
+
+  if ((d.s < 0) || (d.s > ALARM_LENGTH)) alarm_off();
+  else alarm_on();
+}
+
+
+
+
+
+