3 * Copyright 2007 Free Software Foundation, Inc.
5 * This file is part of GNU Radio
7 * GNU Radio is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 3, or (at your option)
12 * GNU Radio is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
28 #include <usrp_standard.h>
32 #include <mblock/class_registry.h>
33 #include <usrp_inband_usb_packet.h>
34 #include <fpga_regs_common.h>
37 #include <symbols_usrp_rx_cs.h>
39 typedef usrp_inband_usb_packet transport_pkt;
41 static const bool verbose = false;
45 usrp_rx::usrp_rx(mb_runtime *rt, const std::string &instance_name, pmt_t user_arg)
46 : mb_mblock(rt, instance_name, user_arg),
48 d_disk_write_pkt(false) // if true, writes full packet, else just the payload
50 d_cs = define_port("cs", "usrp-rx-cs", true, mb_port::EXTERNAL);
53 d_ofile0.open("rx_data_chan0.dat",std::ios::binary|std::ios::out);
54 d_ofile1.open("rx_data_chan1.dat",std::ios::binary|std::ios::out);
55 d_cs_ofile.open("rx_cs.dat",std::ios::binary|std::ios::out);
72 usrp_rx::initial_transition()
78 * \brief Handles incoming signals to to the m-block, wihch should only ever be
79 * a single message: cmd-usrrp-rx-start-reading. There is no signal to stop
80 * reading as the m-block goes in to a forever loop to read inband packets from
84 usrp_rx::handle_message(mb_message_sptr msg)
86 pmt_t event = msg->signal();
87 pmt_t port_id = msg->port_id();
88 pmt_t data = msg->data();
90 // Theoretically only have 1 message to ever expect, but
91 // want to make sure its at least what we want
92 if(pmt_eq(port_id, d_cs->port_symbol())) {
94 if(pmt_eqv(event, s_cmd_usrp_rx_start_reading))
95 read_and_respond(data);
100 * \brief Performs the actual reading of data from the USB bus, called by
101 * handle_message() when a cmd-usrp-rx-start-reading signal is received.
103 * The method enters a forever loop where it continues to read data from the bus
104 * and generate read responses to the higher layer. Currently, shared memory is
105 * used to exit this loop.
107 * The \p data parameter is a PMT list which contains only a single element, an
108 * invocation handle which will be returned with all read respones.
111 usrp_rx::read_and_respond(pmt_t data)
116 unsigned int pkt_size = sizeof(transport_pkt);
118 pmt_t invocation_handle = pmt_nth(0, data);
120 // Need the handle to the RX port to send responses, this is passed
121 // by the USRP interface m-block
122 pmt_t handle = pmt_nth(1, data);
124 boost::any_cast<usrp_standard_rx_sptr>(pmt_any_ref(handle));
127 std::cout << "[usrp_rx] Waiting for packets..\n";
129 // Read by 512 which is packet size and send them back up
130 while(!usrp_rx_stop) {
132 pmt_t v_pkt = pmt_make_u8vector(pkt_size, 0);
134 (transport_pkt *) pmt_u8vector_writable_elements(v_pkt, ignore);
136 n_read = d_urx->read(pkt, pkt_size, &underrun);
138 if(n_read != pkt_size) {
139 std::cerr << "[usrp_rx] Error reading packet, shutting down\n";
140 d_cs->send(s_response_usrp_rx_read,
141 pmt_list3(PMT_NIL, PMT_F, PMT_NIL));
145 if(underrun && verbose && 0)
146 std::cout << "[usrp_rx] Underrun\n";
148 d_cs->send(s_response_usrp_rx_read,
149 pmt_list3(PMT_NIL, PMT_T, v_pkt));
151 std::cout << "[usrp_rx] Read 1 packet\n";
154 if(pkt->chan() == CONTROL_CHAN)
155 d_cs_ofile.write((const char *)pkt, transport_pkt::max_pkt_size());
157 if(d_disk_write_pkt) {
159 d_ofile0.write((const char *)pkt, transport_pkt::max_pkt_size());
160 else if(pkt->chan() == 1)
161 d_ofile1.write((const char *)pkt, transport_pkt::max_pkt_size());
164 d_ofile0.write((const char *)pkt->payload(), transport_pkt::max_payload());
165 else if(pkt->chan() == 1)
166 d_ofile1.write((const char *)pkt->payload(), transport_pkt::max_payload());
176 usrp_rx_stop = false;
179 std::cout << "[USRP_RX] Stopping...\n";
184 REGISTER_MBLOCK_CLASS(usrp_rx);