Git-Mirrors/portapack-mayhem
1
0
Fork 0
mirror of https://github.com/eried/portapack-mayhem.git synced 2025-07-30 01:59:13 -04:00
Code Issues Projects Releases Packages Wiki Activity

Restoring jammer and RDS functionalities, please wait...

Browse source 
Started work on frequency manager and numbers station simulator
This commit is contained in:
furrtek 2016-12-05 12:56:41 +01:00
parent ef0feae62b
commit d18b6d135d
43 changed files with 1083 additions and 734 deletions
Download patch file Download diff file Expand all files Collapse all files

40
firmware/baseband/proc_rds.cpp
View file

@ -22,7 +22,7 @@
#include "proc_rds.hpp"
#include "portapack_shared_memory.hpp"
#include "sine_table.hpp"
#include "sine_table_int8.hpp"
#include "event_m4.hpp"
#include <cstdint>
@ -31,18 +31,18 @@ void RDSProcessor::execute(const buffer_c8_t& buffer) {
for (size_t i = 0; i < buffer.count; i++) {
//Sample generation 2.28M/10=228kHz
if(s >= 9) {
// Sample generation at 2.28M / 10 = 228kHz
if (s >= 9) {
s = 0;
if(sample_count >= SAMPLES_PER_BIT) {
if (sample_count >= SAMPLES_PER_BIT) {
cur_bit = (rdsdata[(bit_pos / 26) & 15] >> (25 - (bit_pos % 26))) & 1;
prev_output = cur_output;
cur_output = prev_output ^ cur_bit;
const int32_t *src = waveform_biphase; // const ok ?
const int32_t * src = waveform_biphase;
int idx = in_sample_index;
for(int j = 0; j < FILTER_SIZE; j++) {
for (int j = 0; j < FILTER_SIZE; j++) {
val = (*src++);
if (cur_output) val = -val;
sample_buffer[idx++] += val;
@ -52,10 +52,11 @@ void RDSProcessor::execute(const buffer_c8_t& buffer) {
in_sample_index += SAMPLES_PER_BIT;
if (in_sample_index >= SAMPLE_BUFFER_SIZE) in_sample_index -= SAMPLE_BUFFER_SIZE;
if (bit_pos < shared_memory.bit_length)
if (bit_pos < message_length)
bit_pos++;
else
bit_pos = 0;
sample_count = 0;
}
@ -64,38 +65,39 @@ void RDSProcessor::execute(const buffer_c8_t& buffer) {
out_sample_index++;
if (out_sample_index >= SAMPLE_BUFFER_SIZE) out_sample_index = 0;
//AM @ 228k/4 = 57kHz
switch (mphase) {
// AM @ 228k/4 = 57kHz
// 0, sample, 0, -sample...
switch (mphase & 3) {
case 0:
case 2: sample = 0; break;
case 1: break;
case 3: sample = -sample; break;
case 3: sample = -sample; // break;
}
mphase++;
if (mphase >= 4) mphase = 0;
sample_count++;
} else {
s++;
}
//FM
frq = (sample>>16) * 386760;
// FM
delta = (sample >> 16) * 386760; // ?
phase = (phase + frq);
sphase = phase + (256<<16);
phase += delta;
sphase = phase + (64 << 18);
re = (sine_table_f32[(sphase & 0x03FF0000)>>18]*127);
im = (sine_table_f32[(phase & 0x03FF0000)>>18]*127);
re = (sine_table_i8[(sphase & 0x03FF0000) >> 18]);
im = (sine_table_i8[(phase & 0x03FF0000) >> 18]);
buffer.p[i] = {(int8_t)re,(int8_t)im};
buffer.p[i] = {(int8_t)re, (int8_t)im};
}
}
void RDSProcessor::on_message(const Message* const msg) {
if (msg->id == Message::ID::RDSConfigure) {
//const auto message = *reinterpret_cast<const RDSConfigureMessage*>(p);
const auto message = *reinterpret_cast<const RDSConfigureMessage*>(msg);
rdsdata = (uint32_t*)shared_memory.tx_data;
message_length = message.length;
configured = true;
}
}