From 4870f0015b4d985d8469599b3fbb3b8370efb628 Mon Sep 17 00:00:00 2001
From: Jared Boone <jboone@earfeast.com>
Date: Tue, 4 Aug 2015 10:29:54 -0700
Subject: [PATCH] Extract PPB reset value to a constant.

Group with related constants.
---
 firmware/common/portapack_persistent_memory.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/firmware/common/portapack_persistent_memory.cpp b/firmware/common/portapack_persistent_memory.cpp
index 3f1a7d13..bb538d0e 100644
--- a/firmware/common/portapack_persistent_memory.cpp
+++ b/firmware/common/portapack_persistent_memory.cpp
@@ -49,6 +49,7 @@ struct range_t {
 
 using ppb_range_t = range_t<ppb_t>;
 constexpr ppb_range_t ppb_range { -99000, 99000 };
+constexpr ppb_t ppb_reset_value { 0 };
 
 /* struct must pack the same way on M4 and M0 cores. */
 struct data_t {
@@ -60,7 +61,7 @@ static_assert(sizeof(data_t) <= 0x100, "Persistent memory structure too large fo
 static data_t* const data = reinterpret_cast<data_t*>(LPC_BACKUP_REG_BASE);
 
 ppb_t correction_ppb() {
-	ppb_range.reset_if_outside(data->correction_ppb, 0);
+	ppb_range.reset_if_outside(data->correction_ppb, ppb_reset_value);
 	return data->correction_ppb;
 }