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moved the calculations related to the local code that is specific to the FPGA to the initialisation phase of the tracking modules to save clock cycles during real-time tracking.

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This commit is contained in:
Marc Majoral
2019-04-02 18:46:37 +02:00
parent db05be36d1
commit a6110eb334
5 changed files with 99 additions and 27 deletions
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35
src/algorithms/tracking/libs/fpga_multicorrelator.cc
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@@ -306,15 +306,15 @@ void Fpga_Multicorrelator_8sc::fpga_configure_tracking_gps_local_code(int32_t PR
d_map_base[PROG_MEMS_ADDR] = LOCAL_CODE_FPGA_CLEAR_ADDRESS_COUNTER;
for (k = 0; k < d_code_length_samples; k++)
{
if (d_ca_codes[(d_code_length_samples * (PRN - 1)) + k] == 1)
{
code_chip = 1;
}
else
{
code_chip = 0;
}
// if (d_ca_codes[(d_code_length_samples * (PRN - 1)) + k] == 1)
// {
// code_chip = 1;
// }
// else
// {
// code_chip = 0;
// }
code_chip = d_ca_codes[(d_code_length_samples * (PRN - 1)) + k];
// copy the local code to the FPGA memory one by one
d_map_base[PROG_MEMS_ADDR] = LOCAL_CODE_FPGA_ENABLE_WRITE_MEMORY | code_chip; // | select_fpga_correlator;
}
@@ -323,14 +323,15 @@ void Fpga_Multicorrelator_8sc::fpga_configure_tracking_gps_local_code(int32_t PR
d_map_base[PROG_MEMS_ADDR] = LOCAL_CODE_FPGA_CLEAR_ADDRESS_COUNTER;
for (k = 0; k < d_code_length_samples; k++)
{
if (d_data_codes[(d_code_length_samples * (PRN - 1)) + k] == 1)
{
code_chip = 1;
}
else
{
code_chip = 0;
}
// if (d_data_codes[(d_code_length_samples * (PRN - 1)) + k] == 1)
// {
// code_chip = 1;
// }
// else
// {
// code_chip = 0;
// }
code_chip = d_data_codes[(d_code_length_samples * (PRN - 1)) + k];
d_map_base[PROG_MEMS_ADDR] = LOCAL_CODE_FPGA_ENABLE_WRITE_MEMORY | code_chip | select_pilot_corelator;
}
}