+++ /dev/null
-/* -*- c++ -*- */
-/*
- * Copyright 2007,2008 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 3, 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.
- */
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-
-#include <usrp_rx_stub.h>
-
-#include <iostream>
-#include <vector>
-#include <usb.h>
-#include <mblock/class_registry.h>
-#include <usrp_inband_usb_packet.h>
-#include <fpga_regs_common.h>
-#include "usrp_standard.h"
-#include <stdio.h>
-#include <string.h>
-#include <ui_nco.h>
-#include <fstream>
-
-#include <symbols_usrp_rx_cs.h>
-
-typedef usrp_inband_usb_packet transport_pkt;
-
-static const bool verbose = false;
-
-bool usrp_rx_stop_stub;
-
-// Used for the fake control packet response code to send the responses back up
-// the RX. The TX stub dumps responses in to this queue.
-std::queue<pmt_t> d_cs_queue;
-
-usrp_rx_stub::usrp_rx_stub(mb_runtime *rt, const std::string &instance_name, pmt_t user_arg)
- : mb_mblock(rt, instance_name, user_arg),
- d_samples_per_frame((long)(126)),
- d_decim_rx(128),
- d_amplitude(16384),
- d_disk_write(false)
-{
-
- // Information about the rates are passed all the way from the app in the form
- // of a dictionary. We use this to read the RX decimation rate and compute
- // the approximate number of MS/s as a form of flow control for the stub.
- pmt_t usrp_dict = user_arg;
-
- if (pmt_is_dict(usrp_dict)) {
- // Read the RX decimation rate
- if(pmt_t decim_rx = pmt_dict_ref(usrp_dict,
- pmt_intern("decim-rx"),
- PMT_NIL)) {
- if(!pmt_eqv(decim_rx, PMT_NIL))
- d_decim_rx = pmt_to_long(decim_rx);
- }
- }
-
- d_cs = define_port("cs", "usrp-rx-cs", true, mb_port::EXTERNAL);
-
- // initialize NCO
- double freq = 100e3;
- int interp = 32; // 32 -> 4MS/s
- double sample_rate = 64e6 / interp;
- d_nco.set_freq(2*M_PI * freq/sample_rate);
-
- //d_disk_write = true;
-
- if(d_disk_write)
- d_ofile.open("raw_rx.dat",std::ios::binary|std::ios::out);
-
- usrp_rx_stop_stub = false;
-}
-
-usrp_rx_stub::~usrp_rx_stub()
-{
- if(d_disk_write)
- d_ofile.close();
-}
-
-void
-usrp_rx_stub::initial_transition()
-{
-}
-
-void
-usrp_rx_stub::handle_message(mb_message_sptr msg)
-{
- pmt_t event = msg->signal();
- pmt_t port_id = msg->port_id();
- pmt_t data = msg->data();
-
- if (pmt_eq(msg->signal(), s_timeout)
- && !pmt_eq(msg->data(), s_done)) {
-
- if(!usrp_rx_stop_stub)
- read_and_respond();
- else { // requested to stop
- cancel_timeout(msg->metadata());
- usrp_rx_stop_stub=false;
- if(verbose)
- std::cout << "[USRP_RX_STUB] Stopping RX stub\n";
- }
-
- }
-
- // Theoretically only have 1 message to ever expect, but
- // want to make sure its at least what we want
- if(pmt_eq(port_id, d_cs->port_symbol())
- && pmt_eqv(event, s_cmd_usrp_rx_start_reading)) {
-
- if(verbose)
- std::cout << "[USRP_RX_STUB] Starting with decim @ "
- << d_decim_rx << std::endl;
-
- start_packet_timer();
- }
-}
-
-// Setup a periodic timer which will drive packet generation
-void
-usrp_rx_stub::start_packet_timer()
-{
- d_t0 = mb_time::time(); // current time
-
- // Calculate the inter-packet arrival time.
- double samples_per_sec = (64.0/(double)d_decim_rx)*1000000.0;
- double frames_per_sec = samples_per_sec / (double)d_samples_per_frame;
- double frame_rate = 1.0 / frames_per_sec;
-
- if(verbose) {
- std::cout << "[USRP_RX_STUB] Scheduling periodic packet generator\n";
- std::cout << "\tsamples_per_sec: " << samples_per_sec << std::endl;
- std::cout << "\tframes_per_sec: " << frames_per_sec << std::endl;
- std::cout << "\tframe_rate: " << frame_rate << std::endl;
- }
-
- schedule_periodic_timeout(d_t0 + frame_rate, mb_time(frame_rate), PMT_T);
-}
-
-void
-usrp_rx_stub::read_and_respond()
-{
-
- long nsamples_this_frame = d_samples_per_frame;
-
- size_t nshorts = 2 * nsamples_this_frame; // 16-bit I & Q
- long channel = 0;
- long n_bytes = nshorts*2;
- pmt_t uvec = pmt_make_s16vector(nshorts, 0);
- size_t ignore;
- int16_t *samples = pmt_s16vector_writable_elements(uvec, ignore);
-
- // fill in the complex sinusoid
-
- for (int i = 0; i < nsamples_this_frame; i++){
-
- if (1){
- gr_complex s;
- d_nco.sincos(&s, 1, d_amplitude);
- // write 16-bit i & q
- samples[2*i] = (int16_t) s.real();
- samples[2*i+1] = (int16_t) s.imag();
- }
- else {
- gr_complex s(d_amplitude, d_amplitude);
-
- // write 16-bit i & q
- samples[2*i] = (int16_t) s.real();
- samples[2*i+1] = (int16_t) s.imag();
- }
- }
-
- if(d_disk_write)
- d_ofile.write((const char *)samples, n_bytes);
-
- pmt_t v_pkt = pmt_make_u8vector(sizeof(transport_pkt), 0);
- transport_pkt *pkt =
- (transport_pkt *) pmt_u8vector_writable_elements(v_pkt, ignore);
-
- pkt->set_header(0, channel, 0, n_bytes);
- pkt->set_timestamp(0xffffffff);
- memcpy(pkt->payload(), samples, n_bytes);
-
- d_cs->send(s_response_usrp_rx_read, pmt_list3(PMT_NIL, PMT_T, v_pkt));
-
- // Now lets check the shared CS queue between the TX and RX stub. Each
- // element in a queue is a list where the first element is an invocation
- // handle and the second element is a PMT u8 vect representation of the
- // CS packet response which can just be passed transparently.
- while(!d_cs_queue.empty()) {
-
- pmt_t cs_pkt = d_cs_queue.front();
- d_cs_queue.pop();
-
- pmt_t invocation_handle = pmt_nth(0, cs_pkt);
- pmt_t v_pkt = pmt_nth(1, cs_pkt);
-
- d_cs->send(s_response_usrp_rx_read,
- pmt_list3(invocation_handle,
- PMT_T,
- v_pkt)); // Take the front CS pkt
-
-
- if(verbose)
- std::cout << "[USRP_RX_STUB] Received CS response from TX stub\n";
- }
-
-}
-
-REGISTER_MBLOCK_CLASS(usrp_rx_stub);
projects / debian / gnuradio / blobdiff