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Fixed LCR transmit and AFSK baseband module

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This commit is contained in:
furrtek
2016-07-27 21:26:03 +02:00
parent 79f2134d91
commit e958b4bd7d
18 changed files with 390 additions and 271 deletions
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firmware/baseband/proc_xylos.cpp
+25 -26
View File
@@ -26,7 +26,7 @@
#include "audio_output.hpp"
#include "portapack_shared_memory.hpp"
#include "sine_table.hpp"
#include "sine_table_int8.hpp"
#include "event_m4.hpp"
#include <cstdint>
@@ -35,18 +35,17 @@ void XylosProcessor::execute(const buffer_c8_t& buffer) {
// This is called at 1536000/2048 = 750Hz
if( !configured ) {
return;
}
if (!configured) return;
for (size_t i = 0; i<buffer.count; i++) {
// Sample generation rate: 1536000/10 = 153kHz
if (s >= (2-1)) {
// Tone generation at 1536000/5 = 307.2kHz
if (s >= (5 - 1)) {
s = 0;
if (silence) {
if (sample_count >= SILENCE) {
// Just occupy channel with carrier
if (sample_count >= CCIR_SILENCE) {
silence = false;
sample_count = CCIR_TONELENGTH;
} else {
@@ -54,16 +53,14 @@ void XylosProcessor::execute(const buffer_c8_t& buffer) {
}
} else {
if (sample_count >= CCIR_TONELENGTH) {
if (transmit_done == false) {
digit = xylosdata[byte_pos++];
if ((digit == 0xFF) || (byte_pos >= 21)) {
message.n = 25; // End of message code
transmit_done = true;
shared_memory.application_queue.push(message);
} else {
message.n = byte_pos; // Inform UI about progress (just as eye candy)
shared_memory.application_queue.push(message);
}
digit = xylosdata[byte_pos++];
if ((digit == 0xFF) || (byte_pos >= 21)) {
configured = false;
message.n = 25; // End of message code
shared_memory.application_queue.push(message);
} else {
message.n = byte_pos; // Inform UI about progress (just as eye candy)
shared_memory.application_queue.push(message);
}
sample_count = 0;
@@ -71,7 +68,7 @@ void XylosProcessor::execute(const buffer_c8_t& buffer) {
sample_count++;
}
aphase += ccir_phases[digit];
tone_phase += ccir_phases[digit];
}
} else {
s++;
@@ -81,7 +78,7 @@ void XylosProcessor::execute(const buffer_c8_t& buffer) {
re = 0;
im = 0;
} else {
sample = (sine_table_f32[(aphase & 0x03FC0000)>>18]*127); // 255 here before
tone_sample = (sine_table_i8[(tone_phase & 0x03FC0000)>>18]);
// Audio preview sample generation: 1536000/48000 = 32
/*if (as >= 31) {
@@ -90,15 +87,17 @@ void XylosProcessor::execute(const buffer_c8_t& buffer) {
} else {
as++;
}*/
//FM
frq = sample * 800; // ?
// FM
// 1<<18 = 262144
// m = (262144 * BW) / 1536000 / 2
frq = tone_sample * 853; // 10kHz BW
phase = (phase + frq);
sphase = phase + (256<<16);
sphase = phase + (64<<18);
re = (sine_table_f32[(sphase & 0x03FC0000)>>18]*127);
im = (sine_table_f32[(phase & 0x03FC0000)>>18]*127);
re = (sine_table_i8[(sphase & 0x03FC0000)>>18]);
im = (sine_table_i8[(phase & 0x03FC0000)>>18]);
}
buffer.p[i] = {(int8_t)re,(int8_t)im};
@@ -115,7 +114,7 @@ void XylosProcessor::on_message(const Message* const p) {
digit = 0;
sample_count = CCIR_TONELENGTH;
as = 0;
transmit_done = false;
silence = true;
configured = true;
}
}