From 5d8b9d524d6424ff98dcc4155fe8b8bd892b6d8f Mon Sep 17 00:00:00 2001
From: Keith Packard <keithp@keithp.com>
Date: Fri, 18 May 2012 20:04:57 -0700
Subject: altos: Add conversion between Pa and meters

To be used with the MS5607 which generates data in calibrated units.

Signed-off-by: Keith Packard <keithp@keithp.com>
---
 src/core/ao.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'src/core/ao.h')

diff --git a/src/core/ao.h b/src/core/ao.h
index 27b9c5c4..a2092cfe 100644
--- a/src/core/ao.h
+++ b/src/core/ao.h
@@ -282,6 +282,18 @@ ao_altitude_to_pres(int16_t alt) __reentrant;
 int16_t
 ao_temp_to_dC(int16_t temp) __reentrant;
 
+/*
+ * ao_convert_pa.c
+ *
+ * Convert between pressure in Pa and altitude in meters
+ */
+
+int32_t
+ao_pa_to_altitude(int32_t pa);
+
+int32_t
+ao_altitude_to_pa(int32_t alt);
+
 #if HAS_DBG
 #include <ao_dbg.h>
 #endif
-- 
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