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/****************************************************************************
*
* This is a part of the TOTEM offline software.
* Authors:
* Edoardo Bossini
* Laurent Forthomme
*
****************************************************************************/
#ifndef EventFilter_CTPPSRawToDigi_TotemT2VFATFrame
#define EventFilter_CTPPSRawToDigi_TotemT2VFATFrame
#include "EventFilter/CTPPSRawToDigi/interface/VFATFrame.h"
#include <cstdint>
/**
* Utilitary namespace to retrieve timing/status information from nT2 VFAT frame
**/
namespace totem::nt2::vfat {
/// multiplicity of 32-bit words combined into a single channel payload
static constexpr size_t num_words_per_channel = 4;
/// multiplicity of channels combined into a single payload
static constexpr size_t num_channels_per_payload = 2;
static constexpr size_t header_offset = 3;
/// get timing information for single leading edge
inline uint16_t leadingEdgeTime(const VFATFrame& frame, size_t ch_id) {
return frame.getData()[header_offset + 2 + num_words_per_channel * ch_id] & 0xffff;
}
/// get timing information for single trailing edge
inline uint16_t trailingEdgeTime(const VFATFrame& frame, size_t ch_id) {
return frame.getData()[header_offset + 3 + num_words_per_channel * ch_id] & 0xffff;
}
/// retrieve this channel marker
inline uint8_t channelMarker(const VFATFrame& frame, size_t ch_id) {
return frame.getData()[header_offset + 1 + num_words_per_channel * ch_id] & 0x1f;
}
/// retrieve the header status flags
inline uint8_t statusMarker(const VFATFrame& frame) { return (frame.getData()[header_offset - 1] >> 8) & 0xf; }
/// retrieve the HW identifier for this channel, in firmware >2.1
inline uint16_t newChannelId(const VFATFrame& frame, size_t ch_id) {
return frame.getData()[header_offset + 0 + num_words_per_channel * ch_id] & 0xffff;
}
} // namespace totem::nt2::vfat
#endif
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