Testing external clock detection and auto-switch

Simplified audio spectrum computation and transfer
ACARS RX in debug mode
Disabled ABI warnings
Updated binary

firmware/common/acars_packet.cpp

@@ -33,7 +33,7 @@ size_t Packet::length() const {
 }
 
 bool Packet::is_valid() const {
-	return length_valid() && crc_ok();
+	return true;	//length_valid() && crc_ok();
 }
 
 Timestamp Packet::received_at() const {
@@ -51,7 +51,7 @@ std::string Packet::registration_number() const {
 	const size_t character_length = 8;
 	for(size_t i=16; i<(16+7*character_length); i+=character_length) {
 		result += (field_.read(i, character_length) & 0x7F);
-	} 
+	}
 
 	return result;
 }

firmware/common/message.hpp

@@ -108,7 +108,7 @@ public:
 		
 		AudioLevelReport = 51,
 		CodedSquelch = 52,
-		AudioSpectrumConfig = 53,
+		AudioSpectrum = 53,
 		MAX
 	};
 
@@ -281,20 +281,16 @@ struct AudioSpectrum {
 	//uint32_t sampling_rate { 0 };
 };
 
-using AudioSpectrumFIFO = FIFO<AudioSpectrum>;
-
-class AudioSpectrumConfigMessage : public Message {
+class AudioSpectrumMessage : public Message {
 public:
-	static constexpr size_t fifo_k = 2;
-	
-	constexpr AudioSpectrumConfigMessage(
-		AudioSpectrumFIFO* fifo
-	) : Message { ID::AudioSpectrumConfig },
-		fifo { fifo }
+	constexpr AudioSpectrumMessage(
+		AudioSpectrum* data
+	) : Message { ID::AudioSpectrum },
+		data { data }
 	{
 	}
 
-	AudioSpectrumFIFO* fifo { nullptr };
+	AudioSpectrum* data { nullptr };
 };
 
 struct ChannelSpectrum {