From df593c2f0f66f4b81b21c49782904fc3da18b1b9 Mon Sep 17 00:00:00 2001
From: Jared Boone <jboone@earfeast.com>
Date: Tue, 29 Dec 2015 10:55:55 -0800
Subject: [PATCH] Run codec at 1 x baseband sample rate. Do not use CPLD
 decimator.

Codec performance appears to be unaffected by <8MHz sample rate. Saves a bit of power, eliminates dependency on CPLD decimation feature.
---
 firmware/application/ais_app.cpp          | 2 +-
 firmware/application/analog_audio_app.cpp | 2 +-
 firmware/application/receiver_model.hpp   | 2 +-
 firmware/application/tpms_app.cpp         | 2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/firmware/application/ais_app.cpp b/firmware/application/ais_app.cpp
index 0487a8bd..13bf711d 100644
--- a/firmware/application/ais_app.cpp
+++ b/firmware/application/ais_app.cpp
@@ -82,7 +82,7 @@ AISModel::AISModel() {
 	receiver_model.set_baseband_configuration({
 		.mode = 3,
 		.sampling_rate = 2457600,
-		.decimation_factor = 4,
+		.decimation_factor = 1,
 	});
 	receiver_model.set_baseband_bandwidth(1750000);
 
diff --git a/firmware/application/analog_audio_app.cpp b/firmware/application/analog_audio_app.cpp
index f5ec76cf..e27ef1c6 100644
--- a/firmware/application/analog_audio_app.cpp
+++ b/firmware/application/analog_audio_app.cpp
@@ -30,7 +30,7 @@ AnalogAudioModel::AnalogAudioModel(ReceiverModel::Mode mode) {
 	receiver_model.set_baseband_configuration({
 		.mode = toUType(mode),
 		.sampling_rate = 3072000,
-		.decimation_factor = 4,
+		.decimation_factor = 1,
 	});
 	receiver_model.set_baseband_bandwidth(1750000);
 }
diff --git a/firmware/application/receiver_model.hpp b/firmware/application/receiver_model.hpp
index c2479c97..818a21a6 100644
--- a/firmware/application/receiver_model.hpp
+++ b/firmware/application/receiver_model.hpp
@@ -93,7 +93,7 @@ private:
 	BasebandConfiguration baseband_configuration {
 		.mode = 1,			/* TODO: Enum! */
 		.sampling_rate = 3072000,
-		.decimation_factor = 4,
+		.decimation_factor = 1,
 	};
 	volume_t headphone_volume_ { -43.0_dB };
 	ClockManager& clock_manager;
diff --git a/firmware/application/tpms_app.cpp b/firmware/application/tpms_app.cpp
index 155c8aa9..85a849c8 100644
--- a/firmware/application/tpms_app.cpp
+++ b/firmware/application/tpms_app.cpp
@@ -30,7 +30,7 @@ TPMSModel::TPMSModel() {
 	receiver_model.set_baseband_configuration({
 		.mode = 5,
 		.sampling_rate = 2457600,
-		.decimation_factor = 4,
+		.decimation_factor = 1,
 	});
 	receiver_model.set_baseband_bandwidth(1750000);