From bd0ec913f50564263fdfb7d3e47151c86773ec39 Mon Sep 17 00:00:00 2001
From: Jared Boone <jboone@earfeast.com>
Date: Wed, 20 Jan 2016 09:02:25 -0800
Subject: [PATCH] Invert TPMS Manchester decoding, fix dependent CRC/checksums.

---
 firmware/application/tpms_app.cpp | 6 +++---
 firmware/application/tpms_app.hpp | 2 +-
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/firmware/application/tpms_app.cpp b/firmware/application/tpms_app.cpp
index 336a86b8..b8076363 100644
--- a/firmware/application/tpms_app.cpp
+++ b/firmware/application/tpms_app.cpp
@@ -63,9 +63,9 @@ size_t Packet::crc_valid_length() const {
 		bytes[i] = reader_.read(i * 8, 8);
 	}
 
-	uint32_t checksum = 6;
-	CRC<uint8_t> crc_72 { 0x01, 0xff };
-	CRC<uint8_t> crc_80 { 0x01, 0xff };
+	uint32_t checksum = 0;
+	CRC<uint8_t> crc_72 { 0x01, 0x00 };
+	CRC<uint8_t> crc_80 { 0x01, 0x00 };
 
 	for(size_t i=0; i<bytes.size(); i++) {
 		const uint32_t byte_mask = 1 << i;
diff --git a/firmware/application/tpms_app.hpp b/firmware/application/tpms_app.hpp
index d0d477f7..e8c39da1 100644
--- a/firmware/application/tpms_app.hpp
+++ b/firmware/application/tpms_app.hpp
@@ -123,7 +123,7 @@ public:
 	constexpr Packet(
 		const baseband::Packet& packet
 	) : packet_ { packet },
-		decoder_ { packet_, 1 },
+		decoder_ { packet_, 0 },
 		reader_ { decoder_ }
 	{
 	}