mirrors/gnss-sdr
1
0
Fork 0
mirror of https://github.com/gnss-sdr/gnss-sdr synced 2024-12-13 19:50:34 +00:00
Code Issues Releases Wiki Activity

Read MACK tag and info

Browse Source
This commit is contained in:
Carles Fernandez 2023-06-07 02:43:34 +02:00
parent 6d69b9db55
commit dafb322018
No known key found for this signature in database
GPG Key ID: 4C583C52B0C3877D
1 changed files with 86 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

90
src/core/libs/osnma_msg_receiver.cc
View File

@ -483,10 +483,92 @@ void osnma_msg_receiver::read_mack_info_and_tags()
d_osnma_data.d_mack_message.tag_and_info = std::vector<MACK_tag_and_info>(nt - 1);
for (uint16_t k = 0; k < (nt - 1); k++)
{
d_osnma_data.d_mack_message.tag_and_info[k].tag = 0;
d_osnma_data.d_mack_message.tag_and_info[k].tag_info.PRN_d = 0;
d_osnma_data.d_mack_message.tag_and_info[k].tag_info.ADKD = 0;
d_osnma_data.d_mack_message.tag_and_info[k].tag_info.cop = 0;
uint64_t tag = 0;
uint8_t PRN_d = 0;
uint8_t ADKD = 0;
uint8_t cop = 0;
if (lt_bits == 20)
{
const uint16_t step = std::ceil(4.5 * k);
if (k % 2 == 0)
{
tag += (static_cast<uint64_t>((d_mack_message[3 + step] & 0x0F)) << 16);
tag += (static_cast<uint64_t>(d_mack_message[4 + step]) << 8);
tag += static_cast<uint64_t>(d_mack_message[5 + step]);
PRN_d += d_mack_message[6 + step];
ADKD += ((d_mack_message[7 + step] & 0xF0) >> 4);
cop += (d_mack_message[7 + step] & 0x0F);
}
else
{
tag += (static_cast<uint64_t>(d_mack_message[3 + step]) << 12);
tag += (static_cast<uint64_t>(d_mack_message[4 + step]) << 4);
tag += (static_cast<uint64_t>((d_mack_message[5 + step] & 0xF0)) >> 4);
PRN_d += (d_mack_message[5 + step] & 0x0F) << 4;
PRN_d += (d_mack_message[6 + step] & 0xF0) >> 4;
ADKD += (d_mack_message[6 + step] & 0x0F);
cop += (d_mack_message[7 + step] & 0xF0) >> 4;
}
}
else if (lt_bits == 24)
{
tag += (static_cast<uint64_t>((d_mack_message[5 + k * 5])) << 16);
tag += (static_cast<uint64_t>((d_mack_message[6 + k * 5])) << 8);
tag += static_cast<uint64_t>(d_mack_message[7 + k * 5]);
PRN_d += d_mack_message[8 + k * 5];
ADKD += ((d_mack_message[9 + k * 5] & 0xF0) >> 4);
cop += (d_mack_message[9 + k * 5] & 0x0F);
}
else if (lt_bits == 28)
{
const uint16_t step = std::ceil(5.5 * k);
if (k % 2 == 0)
{
tag += (static_cast<uint64_t>((d_mack_message[5 + step] & 0x0F)) << 24);
tag += (static_cast<uint64_t>(d_mack_message[6 + step]) << 16);
tag += (static_cast<uint64_t>(d_mack_message[7 + step]) << 8);
tag += static_cast<uint64_t>(d_mack_message[8 + step]);
PRN_d += d_mack_message[9 + step];
ADKD += ((d_mack_message[10 + step] & 0xF0) >> 4);
cop += (d_mack_message[10 + step] & 0x0F);
}
else
{
tag += (static_cast<uint64_t>((d_mack_message[5 + step])) << 20);
tag += (static_cast<uint64_t>((d_mack_message[6 + step])) << 12);
tag += (static_cast<uint64_t>((d_mack_message[7 + step])) << 4);
tag += (static_cast<uint64_t>((d_mack_message[8 + step] & 0xF0)) >> 4);
PRN_d += ((d_mack_message[8 + step] & 0x0F) << 4);
PRN_d += ((d_mack_message[9 + step] & 0xF0) >> 4);
ADKD += (d_mack_message[9 + step] & 0x0F);
cop += ((d_mack_message[10 + step] & 0xF0) >> 4);
}
}
else if (lt_bits == 32)
{
tag += (static_cast<uint64_t>((d_mack_message[6 + k * 6])) << 24);
tag += (static_cast<uint64_t>((d_mack_message[7 + k * 6])) << 16);
tag += (static_cast<uint64_t>((d_mack_message[8 + k * 6])) << 8);
tag += static_cast<uint64_t>(d_mack_message[9 + k * 6]);
PRN_d += d_mack_message[10 + k * 6];
ADKD += ((d_mack_message[11 + k * 6] & 0xF0) >> 4);
cop += (d_mack_message[11 + k * 6] & 0x0F);
}
else if (lt_bits == 40)
{
tag += (static_cast<uint64_t>((d_mack_message[7 + k * 7])) << 32);
tag += (static_cast<uint64_t>((d_mack_message[8 + k * 7])) << 24);
tag += (static_cast<uint64_t>((d_mack_message[9 + k * 7])) << 16);
tag += (static_cast<uint64_t>((d_mack_message[10 + k * 7])) << 8);
tag += static_cast<uint64_t>(d_mack_message[11 + k * 7]);
PRN_d += d_mack_message[12 + k * 7];
ADKD += ((d_mack_message[13 + k * 7] & 0xF0) >> 4);
cop += (d_mack_message[13 + k * 7] & 0x0F);
}
d_osnma_data.d_mack_message.tag_and_info[k].tag = tag;
d_osnma_data.d_mack_message.tag_and_info[k].tag_info.PRN_d = PRN_d;
d_osnma_data.d_mack_message.tag_and_info[k].tag_info.ADKD = ADKD;
d_osnma_data.d_mack_message.tag_and_info[k].tag_info.cop = cop;
}
}