Files
Jungfraujoch/acquisition_device/HLSSimulatedDevice.cpp
2024-03-31 23:08:19 +02:00

754 lines
27 KiB
C++

// Copyright (2019-2023) Paul Scherrer Institute
#include "HLSSimulatedDevice.h"
#include <bitset>
#include <arpa/inet.h>
#include "../fpga/hls/datamover_model.h"
#include "../fpga/hls/hls_jfjoch.h"
uint16_t checksum(const uint16_t *addr, size_t count) {
/* Compute Internet Checksum for "count" bytes
* beginning at location "addr".
*/
long sum = 0;
for (int i = 0; i < count / 2; i++)
sum += addr[i];
/* Add left-over byte, if any */
if (count % 2 == 1)
sum += ((uint8_t *) addr)[count / 2];
/* Fold 32-bit sum to 16 bits */
while (sum>>16)
sum = (sum & 0xffff) + (sum >> 16);
return ~sum;
}
HLSSimulatedDevice::HLSSimulatedDevice(uint16_t data_stream, size_t in_frame_buffer_size_modules, int16_t numa_node)
: FPGAAcquisitionDevice(data_stream),
datamover_in(Direction::Input, nullptr),
datamover_out(Direction::Output, nullptr),
datamover_out_hbm_0(Direction::Output, (char *) hbm.data()),
datamover_out_hbm_1(Direction::Output, (char *) hbm.data()),
datamover_in_hbm_0(Direction::Input, (char *) hbm.data()),
datamover_in_hbm_1(Direction::Input, (char *) hbm.data()),
idle(true), hbm(hbm_if_size / 32 * hbm_if_count),
dma_address_table(65536) {
mac_addr = 0xCCAA11223344;
ipv4_addr = 0x0132010A;
max_modules = MAX_MODULES_FPGA;
MapBuffersStandard(in_frame_buffer_size_modules, numa_node);
auto in_mem_location32 = (uint32_t *) dma_address_table.data();
for (int i = 0; i < buffer_device.size(); i++) {
in_mem_location32[2 * i ] = ((uint64_t) buffer_device[i]) & UINT32_MAX;
in_mem_location32[2 * i + 1] = ((uint64_t) buffer_device[i]) >> 32;
}
}
void HLSSimulatedDevice::CreateFinalPacket(const DiffractionExperiment& experiment) {
CreateJFPacket(experiment, UINT64_MAX, 0, 0, nullptr, false);
}
void HLSSimulatedDevice::SendPacket(char *buffer, int len, uint8_t user) {
auto obuff = (ap_uint<512> *)buffer;
for (int i = 0; i < (len + 63) / 64; i++) {
packet_512_t packet_in;
if (i == (len + 63) / 64 - 1) packet_in.last = 1;
else packet_in.last = 0;
packet_in.keep = 0xFFFFFFFFFFFFFFFF;
packet_in.user = user;
packet_in.data = obuff[i];
din_eth.write(packet_in);
}
}
void HLSSimulatedDevice::CreateJFPacket(const DiffractionExperiment& experiment, uint64_t frame_number, uint32_t eth_packet,
uint32_t module_number, const uint16_t *data, int8_t adjust_axis, uint8_t user) {
char buff[256*64];
memset(buff, 0, 256*64);
auto packet = (jf_raw_packet *)buff;
packet->ether_type = htons(0x0800);
packet->sour_mac[0] = 0x00; // module 0
uint64_t tmp_mac = mac_addr;
for (int i = 0; i < 6; i++)
packet->dest_mac[i] = (tmp_mac >> (8*i)) % 256;
uint32_t half_module = 2 * module_number | ((eth_packet >= 64) ? 1 : 0);
packet->ipv4_header_h = htons(0x4500); // Big endian in IP header!
packet->ipv4_header_total_length = htons(8268); // Big endian in IP header!
packet->ipv4_header_dest_ip = ipv4_addr;
packet->ipv4_header_sour_ip = experiment.GetSrcIPv4Address(data_stream, half_module);
packet->ipv4_header_ttl_protocol = htons(0x0011);
packet->ipv4_header_checksum = checksum( (uint16_t *) &packet->ipv4_header_h, 20); // checksum is already in network order
packet->udp_dest_port = htons(GetUDPPort()); // module number
packet->udp_sour_port = htons(0xDFAC);
packet->udp_length = htons(8248);
// JF headers are little endian
packet->jf.detectortype = SLS_DETECTOR_TYPE_JUNGFRAU;
packet->jf.timestamp = 0xABCDEF0000FEDCBAL;
packet->jf.bunchid = 0x1234567898765431L;
packet->jf.row = half_module;
packet->jf.column = 0;
packet->jf.framenum = frame_number;
packet->jf.packetnum = eth_packet % 64;
if (data != nullptr) {
for (int i = 0; i < 4096; i++)
packet->jf.data[i] = data[i];
}
packet->udp_checksum = htons(checksum( (uint16_t *) (buff+42), 8192+48));
SendPacket(buff, (130+adjust_axis)*64, user);
}
void HLSSimulatedDevice::CreateJFPackets(const DiffractionExperiment& experiment, uint64_t frame_number_0, uint64_t frames,
uint32_t module_number, const uint16_t *data) {
for (uint64_t i = 0; i < frames; i++) {
for (int j = 0; j < 128; j++)
CreateJFPacket(experiment, frame_number_0 + i, j, module_number, data + (i * 128 + j) * 4096, 0, 0);
}
}
void HLSSimulatedDevice::CreateEIGERPacket(const DiffractionExperiment &experiment, uint64_t frame_number,
uint32_t eth_packet, uint32_t module_number, uint32_t col, uint32_t row,
const uint16_t *data) {
char buff[256*64];
memset(buff, 0, 256*64);
auto packet = (eiger_raw_packet *)buff;
packet->ether_type = htons(0x0800);
packet->sour_mac[0] = 0x00; // module 0
uint64_t tmp_mac = mac_addr;
for (int i = 0; i < 6; i++)
packet->dest_mac[i] = (tmp_mac >> (8*i)) % 256;
packet->ipv4_header_h = htons(0x4500); // Big endian in IP header!
packet->ipv4_header_total_length = htons(4172); // Big endian in IP header!
packet->ipv4_header_dest_ip = ipv4_addr;
packet->ipv4_header_sour_ip = experiment.GetSrcIPv4Address(data_stream, 0);
packet->ipv4_header_ttl_protocol = htons(0x0011);
packet->ipv4_header_checksum = checksum( (uint16_t *) &packet->ipv4_header_h, 20); // checksum is already in network order
packet->udp_dest_port = htons(GetUDPPort()); // module number
packet->udp_sour_port = htons(0xDFAC);
packet->udp_length = htons(4152);
// JF headers are little endian
packet->eiger.detectortype = SLS_DETECTOR_TYPE_EIGER;
packet->eiger.timestamp = 0xABCDEF0000FEDCBAL;
packet->eiger.bunchid = 0x1234567898765431L;
packet->eiger.row = (2 * module_number) | (row % 2);
packet->eiger.column = col % 2;
packet->eiger.framenum = frame_number;
packet->eiger.packetnum = eth_packet % 64;
if (data != nullptr) {
for (int i = 0; i < 2048; i++)
packet->eiger.data[i] = data[i];
}
packet->udp_checksum = htons(checksum( (uint16_t *) (buff+42), 4096+48));
SendPacket(buff, 66*64, 0);
}
AXI_STREAM & HLSSimulatedDevice::OutputStream() {
return dout_eth;
}
void HLSSimulatedDevice::HW_ReadActionRegister(DataCollectionConfig *job) {
memcpy(job, &cfg, sizeof(DataCollectionConfig));
}
void HLSSimulatedDevice::HW_WriteActionRegister(const DataCollectionConfig *job) {
memcpy(&cfg, job, sizeof(DataCollectionConfig));
}
void HLSSimulatedDevice::FPGA_StartAction(const DiffractionExperiment &experiment) {
if (action_thread.joinable())
action_thread.join();
run_counter += 1;
run_data_collection = 1;
cancel_data_collection = 0;
idle = false;
while (!din_frame_generator.empty())
din_frame_generator.read();
datamover_out.ClearCompletedDescriptors();
action_thread = std::thread(&HLSSimulatedDevice::HLSMainThread, this );
}
void HLSSimulatedDevice::FrameGeneratorFuture(FrameGeneratorConfig config) {
frame_generator(din_frame_generator,
hbm.data(),
hbm.data(),
hbm_if_size,
mac_addr,
ipv4_addr,
cancel_data_collection,
config);
}
void HLSSimulatedDevice::HW_RunInternalGenerator(const FrameGeneratorConfig &config) {
frame_generator_future = std::async(std::launch::async, &HLSSimulatedDevice::FrameGeneratorFuture, this, config);
}
void HLSSimulatedDevice::FPGA_EndAction() {
if (action_thread.joinable())
action_thread.join();
}
HLSSimulatedDevice::~HLSSimulatedDevice() {
if (action_thread.joinable())
action_thread.join();
}
bool HLSSimulatedDevice::HW_ReadMailbox(uint32_t *values) {
std::unique_lock<std::mutex> ul(completion_mutex);
ap_uint<32> tmp;
bool ret = completion_stream.read_nb(tmp);
values[0] = tmp;
// equivalent to driver functionality
if (ret) {
uint32_t data_collection_id = (values[0] >> 16) & 0xFFFF;
uint32_t handle = values[0] & 0xFFFF;
if (handle == HANDLE_START)
completion_count = 0;
else if ((handle != HANDLE_END) && (data_collection_id != DATA_COLLECTION_ID_PURGE)) {
completion_count++;
while (completion_count * DMA_DESCRIPTORS_PER_MODULE > datamover_out.GetCompletedDescriptors())
std::this_thread::sleep_for(std::chrono::milliseconds(1));
}
}
return ret;
}
void HLSSimulatedDevice::Cancel() {
cancel_data_collection = 1;
}
bool HLSSimulatedDevice::HW_IsIdle() const {
return idle && datamover_out.IsIdle();
}
bool HLSSimulatedDevice::HW_SendWorkRequest(uint32_t handle) {
work_request_stream.write(handle);
return true;
}
inline uint32_t float2uint(float f) {
float_uint32 fu;
fu.f = f;
return fu.u;
}
void HLSSimulatedDevice::HLSMainThread() {
ap_uint<1> clear_counters = 0;
uint64_t packets_processed;
std::vector<std::thread> hls_cores;
STREAM_512 ip1, udp1, udp2, icmp1, arp1;
STREAM_512 network0;
STREAM_768 stream_768_0;
STREAM_768 stream_768_1;
STREAM_768 stream_768_2;
STREAM_768 stream_768_3;
STREAM_768 stream_768_4;
STREAM_768 stream_768_5;
STREAM_512 data_0;
hls::stream<ap_axiu<512, 1, 1, 1>, 2> data_1;
hls::stream<ap_axiu<512, 1, 1, 1>, 2> data_2;
STREAM_512 data_3;
STREAM_512 data_4;
STREAM_512 data_5;
STREAM_512 data_6;
STREAM_512 data_7;
STREAM_512 data_8;
STREAM_512 data_9;
STREAM_512 data_10;
STREAM_512 data_12;
STREAM_512 data_13;
hls::stream<axis_addr> addr0;
hls::stream<axis_addr> addr1;
hls::stream<axis_addr> addr2;
hls::stream<axis_addr> addr3;
hls::stream<axis_completion> axi_compl[12];
hls::stream<ap_uint<16>> hbm_handles;
hls::stream<ap_uint<512>> adu_histo_result;
hls::stream<ap_axiu<64,1,1,1>> integration_result_0;
hls::stream<ap_uint<512>> integration_result_1;
hls::stream<ap_axiu<32,1,1,1>> spot_finder_result_0;
hls::stream<ap_axiu<32,1,1,1>> spot_finder_result_1;
hls::stream<ap_uint<256>> spot_finder_conn_0;
hls::stream<ap_uint<512>> spot_finder_result_2;
hls::stream<ap_uint<32>> spot_finder_mask_0;
hls::stream<ap_uint<256>> roi_calc_result_0;
hls::stream<ap_uint<UDP_METADATA_STREAM_WIDTH> > udp_metadata;
volatile ap_uint<1> idle_data_collection = 1;
ap_uint<1> load_to_hbm_idle;
ap_uint<1> save_to_hbm_idle;
ap_uint<1> integration_idle;
ap_uint<1> stream_conv_idle;
ap_uint<1> frame_summation_idle;
volatile bool done = false;
volatile bool udp_done = false; // done AND udp_idle
volatile bool sls_done = false; // done AND sls_idle
// Sent gratuitous ARP message
arp(arp1, dout_eth, mac_addr, ipv4_addr, 1, 1);
Logger logger_hls("HLS");
volatile rcv_state_t state = RCV_INIT;
// Start data collection
data_collection_fsm(data_0, data_1,
addr0, addr1,
run_data_collection,
cancel_data_collection,
idle_data_collection,
cfg.mode,
float2uint(cfg.energy_kev),
cfg.nframes,
cfg.nmodules,
cfg.nstorage_cells,
cfg.nsummation , state);
run_data_collection = 0;
data_collection_fsm(data_0, data_1,
addr0, addr1,
run_data_collection,
cancel_data_collection,
idle_data_collection,
cfg.mode,
float2uint(cfg.energy_kev),
cfg.nframes,
cfg.nmodules,
cfg.nstorage_cells,
cfg.nsummation, state);
hls_cores.emplace_back([&] {
while (!udp_done) {
if (din_eth.empty() && din_frame_generator.empty())
std::this_thread::sleep_for(std::chrono::microseconds(10));
else
stream_merge(din_eth, din_frame_generator, network0, data_source);
}
logger_hls.Info("Stream_merge done");
});
hls_cores.emplace_back([&] {
while (!udp_done) {
if (network0.empty())
std::this_thread::sleep_for(std::chrono::microseconds(10));
else
ethernet(network0, ip1, arp1, mac_addr, eth_packets, clear_counters);
}
logger_hls.Info("ethernet done");
});
hls_cores.emplace_back([&] {
while (!udp_done) {
if (ip1.empty())
std::this_thread::sleep_for(std::chrono::microseconds(10));
else
ipv4(ip1, udp1, icmp1, ipv4_addr);
}
logger_hls.Info("ipv4 done");
});
hls_cores.emplace_back([&] {
ap_uint<1> udp_idle = 1;
while (!done || !udp_idle) {
if (udp1.empty())
std::this_thread::sleep_for(std::chrono::microseconds(10));
else
udp(udp1, udp2, udp_metadata, udp_packets, clear_counters, udp_idle);
}
udp_done = true;
logger_hls.Info("udp done");
});
hls_cores.emplace_back([&] {
ap_uint<1> sls_idle = 1;
while (!done || !sls_idle) {
if (udp2.empty())
std::this_thread::sleep_for(std::chrono::microseconds (10));
else
sls_detector(udp2, udp_metadata, data_0, addr0, sls_packets, udp_eth_err, udp_len_err, current_pulse_id,
clear_counters, sls_idle);
}
sls_done = true;
logger_hls.Info("sls_detector done");
});
// 1. Parse incoming UDP packets
hls_cores.emplace_back([&] {
while ((state != RCV_WAIT_FOR_START) || (idle_data_collection.read() == 0) || (!data_0.empty())) {
data_collection_fsm(data_0, data_1,
addr0, addr1,
run_data_collection,
cancel_data_collection,
idle_data_collection,
cfg.mode,
float2uint(cfg.energy_kev),
cfg.nframes,
cfg.nmodules,
cfg.nstorage_cells,
cfg.nsummation,
state);
}
done = true;
logger_hls.Info("data collection done");
});
// 2. Cache images in HBM
hls_cores.emplace_back([&] { save_to_hbm(addr1, axi_compl[0], hbm_handles,
datamover_out_hbm_0.GetCtrlStream(),
datamover_out_hbm_1.GetCtrlStream(),
save_to_hbm_idle,
hbm_if_size);});
hls_cores.emplace_back([&] { save_to_hbm_data(data_1,
data_3,
datamover_out_hbm_0.GetDataStream(),
datamover_out_hbm_1.GetDataStream());});
hls_cores.emplace_back([&] {frame_summation_reorder_compl(data_3, data_4, axi_compl[0], axi_compl[1]);});
hls_cores.emplace_back([&] { load_from_hbm(data_4, data_5, axi_compl[1], axi_compl[2], hbm_handles,
datamover_in_hbm_0.GetDataStream(), datamover_in_hbm_1.GetDataStream(),
datamover_in_hbm_0.GetCtrlStream(), datamover_in_hbm_1.GetCtrlStream(),
load_to_hbm_idle, hbm_if_size);});
hls_cores.emplace_back([&] { pedestal(data_5, data_6, axi_compl[2], axi_compl[3],
hbm.data(),
hbm.data(),
hbm.data(),
hbm.data(),
hbm.data(),
hbm.data(),
hbm.data(),
hbm.data(),
hbm.data(),
hbm.data(),
hbm.data(),
hbm.data(),
hbm_if_size);});
// 3. Calculate histogram of ADU values
hls_cores.emplace_back([&] { adu_histo(data_6, data_7, adu_histo_result, axi_compl[3], axi_compl[4]);});
// 4. Mask missing pixels
hls_cores.emplace_back([&] { mask_missing(data_7, data_8, axi_compl[4], axi_compl[5]);});
// 5. Handle EIGER packets properly
hls_cores.emplace_back([&] { eiger_reorder(data_8, data_9, axi_compl[5], axi_compl[6]);});
// 6. Apply pedestal & gain corrections
hls_cores.emplace_back([&] { jf_conversion(data_9, stream_768_0,
axi_compl[6], axi_compl[7],
hbm.data(),
hbm.data(),
hbm.data(),
hbm.data(),
hbm.data(),
hbm.data(),
hbm.data(),
hbm.data(),
hbm.data(),
hbm.data(),
hbm.data(),
hbm.data(),
hbm_if_size); });
// 7. Frame summation
hls_cores.emplace_back([&] { frame_summation(stream_768_0, stream_768_1, axi_compl[7], axi_compl[8], frame_summation_idle);});
// 8. Integration of pixels
hls_cores.emplace_back([&] { integration(stream_768_1, stream_768_2, integration_result_0, axi_compl[8], axi_compl[9],
hbm.data(), hbm.data(), hbm.data(), hbm.data(), integration_idle, hbm_if_size);});
hls_cores.emplace_back([&] { axis_64_to_512(integration_result_0, integration_result_1);});
// 9. Spot finding
ap_uint<32> tmp_snr_threshold = float2uint(spot_finder_parameters.snr_threshold);
ap_uint<32> min_d = float2uint(spot_finder_parameters.min_d);
ap_uint<32> max_d = float2uint(spot_finder_parameters.max_d);
ap_int<32> tmp_count_threshold = spot_finder_parameters.count_threshold;
ap_uint<32> min_pix_per_spot = spot_finder_parameters.min_pix_per_spot;
hls_cores.emplace_back([&] {
spot_finder_mask(stream_768_2,
stream_768_3,
spot_finder_mask_0,
axi_compl[9],
axi_compl[10],
hbm.data(),
hbm.data(),
min_d,
max_d,
hbm_if_size);
logger_hls.Info("spot_finder_mask done");
});
hls_cores.emplace_back([&] {
spot_finder(stream_768_3, spot_finder_mask_0, stream_768_4, spot_finder_result_0, tmp_count_threshold, tmp_snr_threshold);
logger_hls.Info("spot_finder done");
});
hls_cores.emplace_back([&] {
spot_finder_connectivity(spot_finder_result_0,
spot_finder_result_1,
spot_finder_conn_0);
logger_hls.Info("spot_finder_connectivity done");
});
hls_cores.emplace_back([&] {
spot_finder_merge(spot_finder_result_1,
spot_finder_conn_0,
spot_finder_result_2,
min_pix_per_spot);
logger_hls.Info("spot_finder_merge done");
});
hls_cores.emplace_back([&] {
roi_calc(stream_768_4,
stream_768_5,
roi_calc_result_0,
axi_compl[10],
axi_compl[11],
hbm.data(),
hbm.data(),
hbm_if_size);
logger_hls.Info("roi_calc done");
});
// 10. Reduce/extend 24-bit stream
hls_cores.emplace_back([&] { stream_24bit_conv(stream_768_5, data_12, stream_conv_idle);});
// 11. Prepare data to write to host memory
hls_cores.emplace_back([&] {
ap_uint<3> state;
host_writer(data_12, adu_histo_result, integration_result_1, spot_finder_result_2, roi_calc_result_0,
axi_compl[11], datamover_out.GetDataStream(),
datamover_out.GetCtrlStream(), work_request_stream, completion_stream,
dma_address_table.data(), packets_processed, host_writer_idle, cancel_data_collection, state);
logger_hls.Info("host_writer done");
});
for (auto &i : hls_cores)
i.join();
if (frame_generator_future.valid())
frame_generator_future.get();
// reset static counter
arp(arp1, dout_eth, mac_addr, ipv4_addr, 0, 1);
try {
while (!din_eth.empty())
din_eth.read();
if (!addr1.empty())
throw std::runtime_error("Addr1 queue not empty");
if (!addr2.empty())
throw std::runtime_error("Addr2 queue not empty");
if (!addr3.empty())
throw std::runtime_error("Addr3 queue not empty");
if (!data_1.empty())
throw std::runtime_error("data_1 queue not empty");
if (!data_2.empty())
throw std::runtime_error("data_2 queue not empty");
if (!data_3.empty())
throw std::runtime_error("data_3 queue not empty");
if (!data_4.empty())
throw std::runtime_error("data_4 queue not empty");
if (!data_5.empty())
throw std::runtime_error("data_5 queue not empty");
if (!data_7.empty())
throw std::runtime_error("data_7 queue not empty");
if (!data_8.empty())
throw std::runtime_error("data_8 queue not empty");
if (!data_9.empty())
throw std::runtime_error("data_9 queue not empty");
if (!data_10.empty())
throw std::runtime_error("data_10 queue not empty");
if (!data_12.empty())
throw std::runtime_error("data_12 queue not empty");
if (!data_13.empty())
throw std::runtime_error("data_13 queue not empty");
for (auto &c: axi_compl) {
if (!c.empty())
throw std::runtime_error("Compl queue not empty");
}
if (!stream_768_0.empty())
throw std::runtime_error("stream_768_0 queue not empty");
if (!stream_768_1.empty())
throw std::runtime_error("stream_768_1 queue not empty");
if (!stream_768_2.empty())
throw std::runtime_error("stream_768_2 queue not empty");
if (!stream_768_3.empty())
throw std::runtime_error("stream_768_3 queue not empty");
if (!stream_768_4.empty())
throw std::runtime_error("stream_768_4 queue not empty");
if (!hbm_handles.empty())
throw std::runtime_error("Handles queue not empty");
if (!integration_result_0.empty())
throw std::runtime_error("Integration result queue not empty");
if (!integration_result_1.empty())
throw std::runtime_error("Integration result queue not empty");
if (!datamover_in.GetDataStream().empty())
throw std::runtime_error("Datamover queue is not empty");
while (!datamover_out.IsIdle())
std::this_thread::sleep_for(std::chrono::milliseconds(100));
} catch (const std::runtime_error &e) {
if (logger)
logger->ErrorException(e);
throw e;
}
if (logger)
logger->Info("Packets Eth {} UDP {} SLS {} Proc {}", eth_packets, udp_packets, sls_packets, packets_processed);
idle = true;
}
DataCollectionStatus HLSSimulatedDevice::GetDataCollectionStatus() const {
DataCollectionStatus status{};
union {
uint64_t u64;
double d;
} pulse_id_conv;
pulse_id_conv.u64 = current_pulse_id;
status.ctrl_reg = ap_uint<1>(host_writer_idle) ? (1 << 4) : 0;
status.max_modules = max_modules;
status.hbm_size_bytes = hbm_if_size;
status.run_counter = run_counter;
status.current_pulseid = pulse_id_conv.d;
status.packets_udp = udp_packets;
status.packets_eth = eth_packets;
status.packets_sls = sls_packets;
return status;
}
void HLSSimulatedDevice::HW_LoadCalibration(const LoadCalibrationConfig &config) {
int ret = load_calibration(hbm.data(), hbm.data(),
config,
hbm_if_size,
datamover_in.GetCtrlStream(),
datamover_in.GetDataStream(),
dma_address_table.data());
if (ret)
throw JFJochException(JFJochExceptionCategory::AcquisitionDeviceError,
"Error in loading calibration " + std::to_string(ret));
if (!datamover_in.GetDataStream().empty())
throw std::runtime_error("Datamover queue is not empty");
}
void HLSSimulatedDevice::HW_SetSpotFinderParameters(const SpotFinderParameters &params) {
spot_finder_parameters = params;
}
void HLSSimulatedDevice::HW_SetDataSource(uint32_t val) {
data_source = val;
}
uint32_t HLSSimulatedDevice::HW_GetDataSource() {
return data_source;
}
void HLSSimulatedDevice::CreateXfelBunchIDPacket(double pulse_id, uint32_t event_code) {
union {
uint64_t u64;
double d;
} pulse_id_conv;
pulse_id_conv.d = pulse_id;
bunchid_raw_packet packet{};
packet.ether_type = htons(0x0800);
for (int i = 0; i < 6; i++)
packet.dest_mac[i] = 0xFF;
packet.ipv4_header_h = htons(0x4500); // Big endian in IP header!
packet.ipv4_header_total_length = htons(sizeof(bunchid_payload) + 8 + 20); // Big endian in IP header!
packet.ipv4_header_dest_ip = UINT32_MAX;
packet.ipv4_header_ttl_protocol = htons(0x0011);
packet.ipv4_header_checksum = checksum( (uint16_t *) &packet.ipv4_header_h, 20); // checksum is already in network order
packet.udp_length = htons(sizeof(bunchid_payload) + 8);
packet.payload.magicn[0] = BUNCHID_MAGICN;
packet.payload.magicn[1] = BUNCHID_MAGICN;
packet.payload.magicn[2] = BUNCHID_MAGICN;
packet.payload.bunchid_msb[0] = (pulse_id_conv.u64 >> 32) & UINT32_MAX;
packet.payload.bunchid_msb[1] = (pulse_id_conv.u64 >> 32) & UINT32_MAX;
packet.payload.bunchid_lsb[0] = pulse_id_conv.u64 & UINT32_MAX;
packet.payload.bunchid_lsb[1] = pulse_id_conv.u64 & UINT32_MAX;
packet.payload.montrig = event_code;
SendPacket((char *) &packet, sizeof(bunchid_raw_packet));
}