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write BCH to PCAP

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this patch moves the BCH payload buffer into the UE sync object and
therefore allows to pass it to the MAC for PCAP logging
master
Andre Puschmann 5 years ago
parent 6baa89cd2c
commit 08ca9ebd4e
2 changed files with 38 additions and 31 deletions
Show Stats Download Patch File Download Diff File

15
srsue/hdr/phy/sync.h
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@ -104,7 +104,7 @@ private:
void reset();
float get_last_cfo();
void set_agc_enable(bool enable);
ret_code run(srslte_cell_t* cell);
ret_code run(srslte_cell_t* cell, std::array<uint8_t, SRSLTE_BCH_PAYLOAD_LEN>& bch_payload);
private:
sync* p = nullptr;
@ -128,9 +128,15 @@ private:
uint32_t nof_subframes = SFN_SYNC_NOF_SUBFRAMES);
void reset();
bool set_cell(srslte_cell_t cell);
ret_code run_subframe(srslte_cell_t* cell, uint32_t* tti_cnt, bool sfidx_only = false);
ret_code
decode_mib(srslte_cell_t* cell, uint32_t* tti_cnt, cf_t* ext_buffer[SRSLTE_MAX_PORTS], bool sfidx_only = false);
ret_code run_subframe(srslte_cell_t* cell,
uint32_t* tti_cnt,
std::array<uint8_t, SRSLTE_BCH_PAYLOAD_LEN>& bch_payload,
bool sfidx_only = false);
ret_code decode_mib(srslte_cell_t* cell,
uint32_t* tti_cnt,
cf_t* ext_buffer[SRSLTE_MAX_PORTS],
std::array<uint8_t, SRSLTE_BCH_PAYLOAD_LEN>& bch_payload,
bool sfidx_only = false);
private:
const static int SFN_SYNC_NOF_SUBFRAMES = 100;
@ -342,6 +348,7 @@ private:
float time_adv_sec = 0;
float next_time_adv_sec = 0;
uint32_t tti = 0;
std::array<uint8_t, SRSLTE_BCH_PAYLOAD_LEN> mib;
uint32_t tx_worker_cnt = 0;
uint32_t nof_workers = 0;

54
srsue/src/phy/sync.cc
Unescape Escape View File

@ -336,22 +336,19 @@ bool sync::cell_is_camping()
return phy_state.is_camping();
}
/**
* MAIN THREAD
*
*
* The main thread process the SYNC state machine. Every state except IDLE must have exclusive access to
* all variables. If any change of cell configuration must be done, the thread must be in IDLE.
*
* On each state except campling, 1 function is called and the thread jumps to the next state based on the output.
*
* It has 3 states: Cell search, SFN syncrhonization, intial measurement and camping.
* It has 3 states: Cell search, SFN synchronization, initial measurement and camping.
* - CELL_SEARCH: Initial Cell id and MIB acquisition. Uses 1.92 MHz sampling rate
* - CELL_SYNC: Full sampling rate, uses MIB to obtain SFN. When SFN is obtained, moves to CELL_CAMP
* - CELL_CAMP: Cell camping state. Calls the PHCH workers to process subframes and mantains cell synchronization.
* - IDLE: Receives and discards received samples. Does not mantain synchronization.
* - CELL_CAMP: Cell camping state. Calls the PHCH workers to process subframes and maintains cell synchronization.
* - IDLE: Receives and discards received samples. Does not maintain synchronization.
*
*/
@ -393,7 +390,8 @@ void sync::run_thread()
/* Search for a cell in the current frequency and go to IDLE.
* The function search_p.run() will not return until the search finishes
*/
cell_search_ret = search_p.run(&cell);
cell_search_ret = search_p.run(&cell, mib);
stack->bch_decoded_ok(mib.data(), mib.size() / 8);
phy_state.state_exit();
break;
case sync_state::SFN_SYNC:
@ -401,7 +399,7 @@ void sync::run_thread()
/* SFN synchronization using MIB. run_subframe() receives and processes 1 subframe
* and returns
*/
switch(sfn_p.run_subframe(&cell, &tti)) {
switch (sfn_p.run_subframe(&cell, &tti, mib)) {
case sfn_sync::SFN_FOUND:
stack->in_sync();
phy_state.state_exit();
@ -442,7 +440,7 @@ void sync::run_thread()
// Force decode MIB if required
if (force_camping_sfn_sync) {
uint32_t _tti = 0;
sync::sfn_sync::ret_code ret = sfn_p.decode_mib(&cell, &_tti, buffer[0]);
sync::sfn_sync::ret_code ret = sfn_p.decode_mib(&cell, &_tti, buffer[0], mib);
if (ret == sfn_sync::SFN_FOUND) {
// Force tti
@ -995,15 +993,12 @@ void sync::search::set_agc_enable(bool enable)
}
}
sync::search::ret_code sync::search::run(srslte_cell_t* cell)
sync::search::ret_code sync::search::run(srslte_cell_t* cell, std::array<uint8_t, SRSLTE_BCH_PAYLOAD_LEN>& bch_payload)
{
if (!cell) {
return ERROR;
}
uint8_t bch_payload[SRSLTE_BCH_PAYLOAD_LEN];
srslte_ue_cellsearch_result_t found_cells[3];
bzero(cell, sizeof(srslte_cell_t));
@ -1062,11 +1057,13 @@ sync::search::ret_code sync::search::run(srslte_cell_t* cell)
/* Find and decode MIB */
int sfn_offset;
ret = srslte_ue_mib_sync_decode(&ue_mib_sync,
40,
bch_payload, &cell->nof_ports, &sfn_offset);
ret = srslte_ue_mib_sync_decode(&ue_mib_sync, 40, bch_payload.data(), &cell->nof_ports, &sfn_offset);
if (ret == 1) {
srslte_pbch_mib_unpack(bch_payload, cell, NULL);
srslte_pbch_mib_unpack(bch_payload.data(), cell, NULL);
// pack MIB and store inplace for PCAP dump
std::array<uint8_t, SRSLTE_BCH_PAYLOAD_LEN / 8> mib_packed;
srslte_bit_pack_vector(bch_payload.data(), mib_packed.data(), SRSLTE_BCH_PAYLOAD_LEN);
std::copy(std::begin(mib_packed), std::end(mib_packed), std::begin(bch_payload));
fprintf(stdout,
"Found Cell: Mode=%s, PCI=%d, PRB=%d, Ports=%d, CFO=%.1f KHz\n",
@ -1147,7 +1144,10 @@ void sync::sfn_sync::reset()
srslte_ue_mib_reset(&ue_mib);
}
sync::sfn_sync::ret_code sync::sfn_sync::run_subframe(srslte_cell_t* cell, uint32_t* tti_cnt, bool sfidx_only)
sync::sfn_sync::ret_code sync::sfn_sync::run_subframe(srslte_cell_t* cell,
uint32_t* tti_cnt,
std::array<uint8_t, SRSLTE_BCH_PAYLOAD_LEN>& bch_payload,
bool sfidx_only)
{
int ret = srslte_ue_sync_zerocopy(ue_sync, buffer);
@ -1157,7 +1157,7 @@ sync::sfn_sync::ret_code sync::sfn_sync::run_subframe(srslte_cell_t* cell, uint3
}
if (ret == 1) {
sync::sfn_sync::ret_code ret2 = decode_mib(cell, tti_cnt, NULL, sfidx_only);
sync::sfn_sync::ret_code ret2 = decode_mib(cell, tti_cnt, NULL, bch_payload, sfidx_only);
if (ret2 != SFN_NOFOUND) {
return ret2;
}
@ -1174,12 +1174,12 @@ sync::sfn_sync::ret_code sync::sfn_sync::run_subframe(srslte_cell_t* cell, uint3
return IDLE;
}
sync::sfn_sync::ret_code
sync::sfn_sync::decode_mib(srslte_cell_t* cell, uint32_t* tti_cnt, cf_t* ext_buffer[SRSLTE_MAX_PORTS], bool sfidx_only)
sync::sfn_sync::ret_code sync::sfn_sync::decode_mib(srslte_cell_t* cell,
uint32_t* tti_cnt,
cf_t* ext_buffer[SRSLTE_MAX_PORTS],
std::array<uint8_t, SRSLTE_BCH_PAYLOAD_LEN>& bch_payload,
bool sfidx_only)
{
uint8_t bch_payload[SRSLTE_BCH_PAYLOAD_LEN];
// If external buffer provided not equal to internal buffer, copy data
if ((ext_buffer != NULL) && (ext_buffer != buffer)) {
memcpy(buffer[0], ext_buffer[0], sizeof(cf_t) * ue_sync->sf_len);
@ -1196,14 +1196,14 @@ sync::sfn_sync::decode_mib(srslte_cell_t* cell, uint32_t* tti_cnt, cf_t* ext_buf
}
int sfn_offset = 0;
int n = srslte_ue_mib_decode(&ue_mib, bch_payload, NULL, &sfn_offset);
int n = srslte_ue_mib_decode(&ue_mib, bch_payload.data(), NULL, &sfn_offset);
switch (n) {
default:
Error("SYNC: Error decoding MIB while synchronising SFN");
return ERROR;
case SRSLTE_UE_MIB_FOUND:
uint32_t sfn;
srslte_pbch_mib_unpack(bch_payload, cell, &sfn);
srslte_pbch_mib_unpack(bch_payload.data(), cell, &sfn);
sfn = (sfn + sfn_offset) % 1024;
if (tti_cnt) {

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