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/* -*- c++ -*- */
/*
* Copyright 2007 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* GNU Radio is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef INCLUDED_USRP_INBAND_USB_PACKET_H_
#define INCLUDED_USRP_INBAND_USB_PACKET_H_
#include <usrp_bytesex.h>
#include <mb_mblock.h>
static const int USB_PKT_SIZE = 512; // bytes
static const int MAX_PAYLOAD = USB_PKT_SIZE-2*sizeof(uint32_t);
class usrp_inband_usb_packet {
//
// keep raw packet in USRP-endian order
//
uint32_t d_word0;
uint32_t d_timestamp;
unsigned char d_payload[MAX_PAYLOAD];
public:
enum flags {
FL_OVERRUN = 0x80000000,
FL_UNDERRUN = 0x40000000,
FL_DROPPED = 0x20000000,
FL_END_OF_BURST = 0x10000000,
FL_START_OF_BURST = 0x08000000,
FL_ALL_FLAGS = 0xf8000000
};
static const int FL_OVERRUN_SHIFT = 31;
static const int FL_UNDERRUN_SHIFT = 30;
static const int FL_DROPPED_SHIFT = 29;
static const int FL_END_OF_BURST_SHIFT = 28;
static const int FL_START_OF_BURST_SHIFT = 27;
static const int RSSI_MASK = 0x3f;
static const int RSSI_SHIFT = 21;
static const int CHAN_MASK = 0x1f;
static const int CHAN_SHIFT = 16;
static const int TAG_MASK = 0xf;
static const int TAG_SHIFT = 9;
static const int PAYLOAD_LEN_MASK = 0x1ff;
static const int PAYLOAD_LEN_SHIFT = 0;
public:
void set_timestamp(uint32_t timestamp){
d_timestamp = host_to_usrp_u32(timestamp);
}
void set_end_of_burst() {
uint32_t word0 = usrp_to_host_u32(d_word0);
word0 |= 1<<FL_END_OF_BURST_SHIFT;
d_word0 = host_to_usrp_u32(word0);
}
void set_header(int flags, int chan, int tag, int payload_len){
uint32_t word0 = ((flags & FL_ALL_FLAGS)
| ((chan & CHAN_MASK) << CHAN_SHIFT)
| ((tag & TAG_MASK) << TAG_SHIFT)
| ((payload_len & PAYLOAD_LEN_MASK) << PAYLOAD_LEN_SHIFT));
d_word0 = host_to_usrp_u32(word0);
}
uint32_t timestamp() const {
return usrp_to_host_u32(d_timestamp);
}
int rssi() const {
uint32_t word0 = usrp_to_host_u32(d_word0);
return (word0 >> RSSI_SHIFT) & RSSI_MASK;
}
int chan() const {
uint32_t word0 = usrp_to_host_u32(d_word0);
return (word0 >> CHAN_SHIFT) & CHAN_MASK;
}
int tag() const {
uint32_t word0 = usrp_to_host_u32(d_word0);
return (word0 >> TAG_SHIFT) & TAG_MASK;
}
int payload_len() const {
uint32_t word0 = usrp_to_host_u32(d_word0);
return (word0 >> PAYLOAD_LEN_SHIFT) & PAYLOAD_LEN_MASK;
}
int flags() const {
return usrp_to_host_u32(d_word0) & FL_ALL_FLAGS;
}
int overrun() const {
return (usrp_to_host_u32(d_word0) & FL_OVERRUN) >> FL_OVERRUN_SHIFT;
}
int underrun() const {
return (usrp_to_host_u32(d_word0) & FL_UNDERRUN) >> FL_UNDERRUN_SHIFT;
}
int start_of_burst() const {
return (usrp_to_host_u32(d_word0) & FL_START_OF_BURST) >> FL_START_OF_BURST_SHIFT;
}
int end_of_burst() const {
return (usrp_to_host_u32(d_word0) & FL_END_OF_BURST) >> FL_END_OF_BURST_SHIFT;
}
int dropped() const {
return (usrp_to_host_u32(d_word0) & FL_DROPPED) >> FL_DROPPED_SHIFT;
}
unsigned char *payload() {
return d_payload;
}
static int max_payload() {
return MAX_PAYLOAD;
}
};
#endif
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