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Added bitrate option for POCSAG baseband, PWMRSSI frequency option

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Split SD card wiper app
Cleanup for -Weffc++
This commit is contained in:
furrtek 2017-01-16 08:40:17 +00:00
parent 5e40669cbc
commit e4abcea9a3
23 changed files with 314 additions and 190 deletions
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85
firmware/baseband/proc_pocsag.cpp
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@ -29,49 +29,50 @@
#include <cstdint>
#include <cstddef>
#define FREQ_SAMP 24000
#define BAUD 1200
#define SPHASEINC (0x10000u * BAUD / FREQ_SAMP)
#define POCSAG_AUDIO_RATE 24000
#define POCSAG_SYNC 0x7CD215D8
#define POCSAG_IDLE 0x7A89C197
#define POCSAG_PREAMBLE_LENGTH 576
#define POCSAG_BATCH_LENGTH (9 * 32)
void POCSAGProcessor::execute(const buffer_c8_t& buffer) {
/* 1.536MHz, 2048 samples */
// Samplerate is 1.536MHz, gets 2048 samples, called at 750Hz
if( !configured ) return;
if (!configured) return;
// Get 24kHz audio
const auto decim_0_out = decim_0.execute(buffer, dst_buffer);
const auto decim_1_out = decim_1.execute(decim_0_out, dst_buffer);
auto audio = demod.execute(decim_1_out, audio_buffer);
for (c = 0; c < 32; c++) {
// End up with 32 samples
for (uint32_t c = 0; c < 32; c++) {
// Bit = sign
const int32_t audio_sample = audio.p[c] * 32768.0f; // sample_int
const int32_t audio_sample = audio.p[c] * 32768.0f;
//const int32_t audio_sample = __SSAT(sample_int, 16);
dcd_shreg <<= 1;
dcd_shreg |= (audio_sample < 0);
slicer_sr <<= 1;
slicer_sr |= (audio_sample < 0);
// Detect transitions to adjust clock
if ((dcd_shreg ^ (dcd_shreg >> 1)) & 1) {
if (sphase < (0x8000u-(SPHASEINC/2)))
sphase += SPHASEINC/8;
if ((slicer_sr ^ (slicer_sr >> 1)) & 1) {
if (sphase < (0x8000u - sphase_delta_half))
sphase += sphase_delta_eighth;
else
sphase -= SPHASEINC/8;
sphase -= sphase_delta_eighth;
}
sphase += SPHASEINC;
sphase += sphase_delta;
// Symbol time elapsed
if (sphase >= 0x10000u) {
sphase &= 0xffffu;
sphase &= 0xFFFFu;
rx_data <<= 1;
rx_data |= (dcd_shreg & 1);
rx_data |= (slicer_sr & 1);
switch(rx_state) {
switch (rx_state) {
case WAITING:
if (rx_data == 0xAAAAAAAA) {
@ -79,12 +80,10 @@ void POCSAGProcessor::execute(const buffer_c8_t& buffer) {
sync_timeout = 0;
}
break;
case PREAMBLE:
if (sync_timeout < 600) {
if (sync_timeout < POCSAG_PREAMBLE_LENGTH) {
sync_timeout++;
//pocsag_brute_repair(&s->l2.pocsag, &rx_data);
if (rx_data == POCSAG_SYNC) {
packet.clear();
@ -94,44 +93,39 @@ void POCSAGProcessor::execute(const buffer_c8_t& buffer) {
last_rx_data = rx_data;
rx_state = SYNC;
} else if (rx_data == POCSAG_IDLE) {
push_packet(pocsag::PacketFlag::IDLE);
rx_state = WAITING;
}
} else {
rx_state = WAITING; // Abort
rx_state = WAITING; // Timed out: abort
}
break;
case SYNC:
if (msg_timeout < 600) {
if (msg_timeout < POCSAG_BATCH_LENGTH) {
msg_timeout++;
rx_bit++;
if (rx_bit >= 32) {
rx_bit = 0;
// Got a complete codeword
//pocsag_brute_repair(&s->l2.pocsag, &rx_data);
packet.set(frame_counter, rx_data);
if ((rx_data == POCSAG_IDLE) && (!(last_rx_data & 0x80000000))) {
// SYNC then IDLE always means end of message ?
packet.set_bitrate(pocsag::BitRate::FSK1200);
packet.set_flag(pocsag::PacketFlag::NORMAL);
packet.set_timestamp(Timestamp::now());
const POCSAGPacketMessage message(packet);
shared_memory.application_queue.push(message);
push_packet(pocsag::PacketFlag::NORMAL);
rx_state = WAITING;
} else {
if (frame_counter < 15) {
frame_counter++;
} else {
// More than 17-1 codewords
packet.set_bitrate(pocsag::BitRate::FSK1200);
packet.set_flag(pocsag::PacketFlag::TOO_LONG);
packet.set_timestamp(Timestamp::now());
const POCSAGPacketMessage message(packet);
shared_memory.application_queue.push(message);
push_packet(pocsag::PacketFlag::TOO_LONG);
rx_state = WAITING;
}
}
@ -140,11 +134,7 @@ void POCSAGProcessor::execute(const buffer_c8_t& buffer) {
}
} else {
// Timed out (no end of message received)
packet.set_bitrate(pocsag::BitRate::FSK1200);
packet.set_flag(pocsag::PacketFlag::TIMED_OUT);
packet.set_timestamp(Timestamp::now());
const POCSAGPacketMessage message(packet);
shared_memory.application_queue.push(message);
push_packet(pocsag::PacketFlag::TIMED_OUT);
rx_state = WAITING;
}
break;
@ -156,14 +146,20 @@ void POCSAGProcessor::execute(const buffer_c8_t& buffer) {
}
}
void POCSAGProcessor::push_packet(pocsag::PacketFlag flag) {
packet.set_bitrate(bitrate);
packet.set_flag(flag);
packet.set_timestamp(Timestamp::now());
const POCSAGPacketMessage message(packet);
shared_memory.application_queue.push(message);
}
void POCSAGProcessor::on_message(const Message* const message) {
if (message->id == Message::ID::POCSAGConfigure)
configure(*reinterpret_cast<const POCSAGConfigureMessage*>(message));
}
void POCSAGProcessor::configure(const POCSAGConfigureMessage& message) {
(void)message;
constexpr size_t decim_0_input_fs = baseband_fs;
constexpr size_t decim_0_output_fs = decim_0_input_fs / decim_0.decimation_factor;
@ -176,6 +172,11 @@ void POCSAGProcessor::configure(const POCSAGConfigureMessage& message) {
decim_1.configure(taps_11k0_decim_1.taps, 131072);
demod.configure(demod_input_fs, 4500);
bitrate = message.bitrate;
sphase_delta = 0x10000u * bitrate / POCSAG_AUDIO_RATE;
sphase_delta_half = sphase_delta / 2; // Just for speed
sphase_delta_eighth = sphase_delta / 8;
rx_state = WAITING;
configured = true;
}