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Remove sine table lookup from proc_ook (#3201)

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Synray
2026-06-12 07:26:13 -07:00
committed by GitHub
parent e2586ceb22
commit a93f2ff583
3 changed files with 6 additions and 21 deletions
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firmware/baseband/proc_ook.cpp
+4 -17
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@@ -22,25 +22,19 @@
#include "proc_ook.hpp" #include "proc_ook.hpp"
#include "portapack_shared_memory.hpp" #include "portapack_shared_memory.hpp"
#include "sine_table_int8.hpp"
#include "event_m4.hpp" #include "event_m4.hpp"
#include <cstdint> #include <cstdint>
inline void OOKProcessor::write_sample(const buffer_c8_t& buffer, uint8_t bit_value, size_t i) { inline void OOKProcessor::write_sample(const buffer_c8_t& buffer, uint8_t bit_value, size_t i) {
int8_t re, im; int8_t re, im;
if (bit_value) { if (bit_value) {
phase = (phase + 200); // What ? re = INT8_MAX;
sphase = phase + (64 << 18); im = 0;
re = (sine_table_i8[(sphase & 0x03FC0000) >> 18]);
im = (sine_table_i8[(phase & 0x03FC0000) >> 18]);
} else { } else {
re = 0; re = 0;
im = 0; im = 0;
} }
buffer.p[i] = {re, im}; buffer.p[i] = {re, im};
} }
@@ -125,11 +119,8 @@ inline size_t OOKProcessor::duval_algo_step() {
void OOKProcessor::scan_process(const buffer_c8_t& buffer) { void OOKProcessor::scan_process(const buffer_c8_t& buffer) {
size_t buf_ptr = 0; size_t buf_ptr = 0;
// transmit any leftover bits from previous step // Encode the sequence into required format. First call transmits any leftover bits from previous step
if (!scan_encode(buffer, buf_ptr)) while (scan_encode(buffer, buf_ptr)) {
return;
while (1) {
// calculate next chunk of deBruijn sequence // calculate next chunk of deBruijn sequence
duval_length = duval_algo_step(); duval_length = duval_algo_step();
@@ -151,10 +142,6 @@ void OOKProcessor::scan_process(const buffer_c8_t& buffer) {
duval_bit = 0; duval_bit = 0;
duval_sample_bit = 0; duval_sample_bit = 0;
duval_symbol = 0; duval_symbol = 0;
// encode the sequence into required format
if (!scan_encode(buffer, buf_ptr))
break;
} }
} }
firmware/baseband/proc_ook.hpp
-2
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@@ -46,8 +46,6 @@ class OOKProcessor : public BasebandProcessor {
uint16_t bit_pos{0}; uint16_t bit_pos{0};
uint8_t cur_bit{0}; uint8_t cur_bit{0};
uint32_t sample_count{0}; uint32_t sample_count{0};
uint32_t tone_phase{0}, phase{0}, sphase{0};
int32_t tone_sample{0}, sig{0}, frq{0};
TXProgressMessage txprogress_message{}; TXProgressMessage txprogress_message{};
firmware/common/sine_table_int8.hpp
+2 -2
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@@ -23,9 +23,9 @@
#ifndef __SINE_TABLE_I8_H__ #ifndef __SINE_TABLE_I8_H__
#define __SINE_TABLE_I8_H__ #define __SINE_TABLE_I8_H__
#include <cmath> #include <cstdint>
static const int8_t sine_table_i8[256] = { static constexpr int8_t sine_table_i8[256] = {
0, 2, 5, 8, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42, 45, 0, 2, 5, 8, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42, 45,
48, 51, 54, 57, 59, 62, 65, 67, 70, 73, 75, 78, 80, 83, 85, 87, 48, 51, 54, 57, 59, 62, 65, 67, 70, 73, 75, 78, 80, 83, 85, 87,
90, 92, 94, 96, 98, 100, 102, 104, 105, 107, 109, 110, 112, 113, 115, 116, 90, 92, 94, 96, 98, 100, 102, 104, 105, 107, 109, 110, 112, 113, 115, 116,