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Wideband FM configuration messages from M0.

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This commit is contained in:
Jared Boone
2016-01-03 13:38:55 -08:00
parent 317ec53638
commit f2f7032615
5 changed files with 99 additions and 29 deletions
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55
firmware/baseband/proc_wfm_audio.cpp
View File

@@ -23,26 +23,11 @@
#include <cstdint>
WidebandFMAudio::WidebandFMAudio() {
constexpr size_t baseband_fs = 3072000;
constexpr size_t decim_0_input_fs = baseband_fs;
constexpr size_t decim_0_decimation_factor = 4;
constexpr size_t decim_0_output_fs = decim_0_input_fs / decim_0_decimation_factor;
constexpr size_t decim_1_input_fs = decim_0_output_fs;
constexpr size_t decim_1_decimation_factor = 2;
constexpr size_t decim_1_output_fs = decim_1_input_fs / decim_1_decimation_factor;
constexpr size_t demod_input_fs = decim_1_output_fs;
decim_0.configure(taps_200k_wfm_decim_0.taps, 33554432);
decim_1.configure(taps_200k_wfm_decim_1.taps, 131072);
demod.configure(demod_input_fs, 75000);
audio_filter.configure(taps_64_lp_156_198.taps);
}
void WidebandFMAudio::execute(const buffer_c8_t& buffer) {
if( !configured ) {
return;
}
std::array<complex16_t, 512> dst;
const buffer_c16_t dst_buffer {
dst.data(),
@@ -94,3 +79,35 @@ void WidebandFMAudio::execute(const buffer_c8_t& buffer) {
fill_audio_buffer(audio);
}
void WidebandFMAudio::on_message(const Message* const message) {
switch(message->id) {
case Message::ID::WFMConfigure:
configure(*reinterpret_cast<const WFMConfigureMessage*>(message));
break;
default:
break;
}
}
void WidebandFMAudio::configure(const WFMConfigureMessage& message) {
constexpr size_t baseband_fs = 3072000;
constexpr size_t decim_0_input_fs = baseband_fs;
constexpr size_t decim_0_decimation_factor = 4;
constexpr size_t decim_0_output_fs = decim_0_input_fs / decim_0_decimation_factor;
constexpr size_t decim_1_input_fs = decim_0_output_fs;
constexpr size_t decim_1_decimation_factor = 2;
constexpr size_t decim_1_output_fs = decim_1_input_fs / decim_1_decimation_factor;
constexpr size_t demod_input_fs = decim_1_output_fs;
decim_0.configure(message.decim_0_filter.taps, 33554432);
decim_1.configure(message.decim_1_filter.taps, 131072);
demod.configure(demod_input_fs, message.deviation);
audio_filter.configure(message.audio_filter.taps);
configured = true;
}

7
firmware/baseband/proc_wfm_audio.hpp
View File

@@ -33,10 +33,10 @@
class WidebandFMAudio : public BasebandProcessor {
public:
WidebandFMAudio();
void execute(const buffer_c8_t& buffer) override;
void on_message(const Message* const message) override;
private:
dsp::decimate::FIRC8xR16x24FS4Decim4 decim_0;
dsp::decimate::FIRC16xR16x16Decim2 decim_1;
@@ -48,6 +48,9 @@ private:
IIRBiquadFilter audio_hpf { audio_hpf_30hz_config };
IIRBiquadFilter audio_deemph { audio_deemph_2122_6_config };
bool configured { false };
void configure(const WFMConfigureMessage& message);
};
#endif/*__PROC_WFM_AUDIO_H__*/