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Merge branch 'ism' of github.com:carlesfernandez/gnss-sdr into ism

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This commit is contained in:
Carles Fernandez
2024-09-20 17:06:22 +02:00
parent 660770f9fb 583ae6df0d
commit db78d104bf
3 changed files with 60 additions and 10 deletions
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16
src/core/system_parameters/galileo_ism.cc
View File

@@ -15,7 +15,6 @@
*/
#include "galileo_ism.h"
#include <boost/crc.hpp>
#include <boost/dynamic_bitset.hpp>
#include <algorithm>
#include <vector>
@@ -176,15 +175,12 @@ uint16_t Galileo_ISM::get_Tvalidity_hours() const
}
bool Galileo_ISM::check_ism_crc(const std::bitset<GALILEO_DATA_JK_BITS>& bits) const
bool Galileo_ISM::check_ism_crc(const std::bitset<GALILEO_DATA_JK_BITS>& bits)
{
boost::dynamic_bitset<unsigned char> frame_bits(bits.to_string().substr(0, GALILEO_ISM_CRC_DATA_BITS));
std::vector<unsigned char> bytes;
boost::to_block_range(frame_bits, std::back_inserter(bytes));
std::reverse(bytes.begin(), bytes.end());
boost::crc_32_type crc32_ism;
crc32_ism.process_bytes(bytes.data(), GALILEO_ISM_CRC_DATA_BYTES);
const uint32_t crc_computed = crc32_ism.checksum();
if (this->ism_crc == crc_computed)
@@ -193,4 +189,12 @@ bool Galileo_ISM::check_ism_crc(const std::bitset<GALILEO_DATA_JK_BITS>& bits) c
}
return false;
}
}
uint32_t Galileo_ISM::compute_crc(const std::vector<uint8_t>& data)
{
crc32_ism.process_bytes(data.data(), data.size());
uint32_t result = crc32_ism.checksum();
return result;
}

11
src/core/system_parameters/galileo_ism.h
View File

@@ -19,9 +19,11 @@
#define GNSS_SDR_GALILEO_ISM_H
#include "Galileo_INAV.h"
#include <boost/crc.hpp>
#include <bitset>
#include <cstdint>
#include <unordered_map>
#include <vector>
/** \addtogroup Core
* \{ */
@@ -41,7 +43,7 @@ public:
/*!
* Default constructor
*/
Galileo_ISM() = default;
Galileo_ISM() : crc32_ism(0x814141AB, 0, 0, false, false) {};
void set_ism_constellation_id(uint8_t const_id);
void set_ism_service_level_id(uint8_t sl_id);
@@ -57,7 +59,7 @@ public:
void set_ism_Tvalidity(uint8_t tvalidity);
void set_ism_crc(uint32_t crc);
bool check_ism_crc(const std::bitset<GALILEO_DATA_JK_BITS>& bits) const;
bool check_ism_crc(const std::bitset<GALILEO_DATA_JK_BITS>& bits);
double get_pconst_value() const;
double get_psat_value() const;
@@ -67,8 +69,11 @@ public:
uint16_t get_WN_ISM() const;
uint16_t get_t0_ISM() const;
uint16_t get_Tvalidity_hours() const;
uint32_t compute_crc(const std::vector<uint8_t>& data);
private:
boost::crc_basic<32> crc32_ism;
// ICD 2.1 Table 97
std::unordered_map<uint8_t, double> ISM_PCONST_MAP = {
{0, 1.0e-8},
@@ -145,7 +150,6 @@ private:
{14, 3.75},
{15, 4.00}};
// ICD 2.1 Table 101
std::unordered_map<uint8_t, float> ISM_BNOM_MAP = {
{0, 0.0},
@@ -165,7 +169,6 @@ private:
{14, 2.0},
{15, 2.4}};
// ICD 2.1 Table 102
std::unordered_map<uint8_t, uint16_t> ISM_TVALIDITY_MAP = {
{0, 1},