From 6708da2661d693f855b6f56d69af1e2fb8502463 Mon Sep 17 00:00:00 2001
From: Lars-Dominik Braun <lars@6xq.net>
Date: Tue, 23 Sep 2014 17:24:57 +0200
Subject: Add wakeup source mechanism

Should reduce amount of cpu wakeups with expensive computations.
---
 common.h | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

(limited to 'common.h')

diff --git a/common.h b/common.h
index 5957da3..fb53d4d 100644
--- a/common.h
+++ b/common.h
@@ -23,5 +23,27 @@
 		} \
 	}
 
+#include <stdbool.h>
+
+/* global wakeup flag, incremented by functions that interact with the main
+ * loop (i.e. not pwm) */
+extern volatile uint8_t wakeup;
+
+/* wakeup sources */
+enum {
+	WAKE_ACCEL = 0,
+	WAKE_GYRO = 1,
+	WAKE_I2C = 2,
+	WAKE_TIMER = 3,
+};
+
+#define shouldWakeup(x) (wakeup & (1 << x))
+#define enableWakeup(x) wakeup |= 1 << x;
+#include <util/atomic.h>
+#define disableWakeup(x) \
+	ATOMIC_BLOCK (ATOMIC_FORCEON) { \
+		wakeup &= ~(1 << x); \
+	}
+
 #endif /* COMMON_H */
 
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