portapack-mayhem/mayhem-firmware
1
0
Fork 0
mirror of https://github.com/portapack-mayhem/mayhem-firmware.git synced 2026-09-11 00:59:28 +00:00
Code Issues Packages Projects Releases 10 Wiki Activity

RDS radiotext transmit (group 2A)

Browse Source 
Keyboard/Unistroke text input method selection
This commit is contained in:
furrtek
2016-05-29 12:06:47 +02:00
parent ceced96673
commit e15f659a6a
34 changed files with 574 additions and 169 deletions
Download Patch File Download Diff File Expand all files Collapse all files
firmware/baseband-tx/proc_rds.cpp
+15 -10
View File
@@ -27,21 +27,24 @@
#include <cstdint>
void RDSProcessor::execute(const buffer_c8_t& buffer) {
uint32_t * rdsdata;
for (size_t i = 0; i<buffer.count; i++) {
rdsdata = (uint32_t *)shared_memory.radio_data;
for (size_t i = 0; i < buffer.count; i++) {
//Sample generation 2.28M/10=228kHz
if(s >= 9) {
s = 0;
if(sample_count >= SAMPLES_PER_BIT) {
cur_bit = (shared_memory.rdsdata[(bit_pos / 26) & 15]>>(25-(bit_pos % 26))) & 1;
cur_bit = (rdsdata[(bit_pos / 26) & 15] >> (25 - (bit_pos % 26))) & 1;
prev_output = cur_output;
cur_output = prev_output ^ cur_bit;
int32_t *src = waveform_biphase;
const int32_t *src = waveform_biphase; // const ok ?
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;
@@ -51,7 +54,10 @@ 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;
bit_pos++;
if (bit_pos < shared_memory.bit_length)
bit_pos++;
else
bit_pos = 0;
sample_count = 0;
}
@@ -60,7 +66,7 @@ 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
//AM @ 228k/4 = 57kHz
switch (mphase) {
case 0:
case 2: sample = 0; break;
@@ -80,11 +86,10 @@ void RDSProcessor::execute(const buffer_c8_t& buffer) {
phase = (phase + frq);
sphase = phase + (256<<16);
//re = sintab[(sphase & 0x03FF0000)>>16];
//im = sintab[(phase & 0x03FF0000)>>16];
re = (sine_table_f32[(sphase & 0x03FF0000)>>18]*127);
im = (sine_table_f32[(phase & 0x03FF0000)>>18]*127);
buffer.p[i] = {(int8_t)re,(int8_t)im};
}
}