Added the class switch_FPGA, which controls the switch in the FPGA that connects the analog frontend and the DMA to the queues of the HW accelerators.

Removed some unused variables in the tracking.

src/algorithms/signal_source/adapters/ad9361_fpga_signal_source.cc

@@ -108,6 +108,12 @@ Ad9361FpgaSignalSource::Ad9361FpgaSignalSource(ConfigurationInterface* configura
                                scale_dds_dbfs_);
     }
 
+    // turn switch to A/D position
+    std::string default_device_name = "/dev/uio13";
+    std::string device_name = configuration->property(role + ".devicename", default_device_name);
+    int switch_position = configuration->property(role + ".switch_position", 0);
+    switch_fpga = std::make_shared <fpga_switch>(device_name);
+    switch_fpga->set_switch_position(switch_position);
 }
 
 

src/algorithms/signal_source/adapters/ad9361_fpga_signal_source.h

@@ -33,6 +33,7 @@
 #define GNSS_SDR_AD9361_FPGA_SIGNAL_SOURCE_H_
 
 #include "gnss_block_interface.h"
+#include "fpga_switch.h"
 
 #include <boost/shared_ptr.hpp>
 #include <gnuradio/msg_queue.h>
@@ -112,6 +113,8 @@ private:
     std::string dump_filename_;
 
     boost::shared_ptr<gr::msg_queue> queue_;
+
+    std::shared_ptr<fpga_switch> switch_fpga;
 };
 
 #endif /*GNSS_SDR_AD9361_FPGA_SIGNAL_SOURCE_H_*/

src/algorithms/signal_source/libs/CMakeLists.txt

@@ -58,6 +58,10 @@ set (SIGNAL_SOURCE_LIB_SOURCES
   rtl_tcp_dongle_info.cc
   ${OPT_SIGNAL_SOURCE_LIB_SOURCES})
 
+if(ENABLE_FPGA)
+    SET(SIGNAL_SOURCE_LIB_SOURCES ${SIGNAL_SOURCE_LIB_SOURCES} fpga_switch.cc)
+endif(ENABLE_FPGA)
+
 include_directories(
      ${CMAKE_CURRENT_SOURCE_DIR}
      ${Boost_INCLUDE_DIRS}

src/algorithms/signal_source/libs/fpga_switch.cc

@@ -0,0 +1,136 @@
+/*!
+ * \file fpga_switch.cc
+ * \brief Switch that connects the HW accelerator queues to the analog front end or the DMA.
+ * \authors <ul>
+ *    <li> Marc Majoral, 2017. mmajoral(at)cttc.cat
+ *    <li> Javier Arribas, 2015. jarribas(at)cttc.es
+ * </ul>
+ *
+ * Class that controls a switch in the FPGA
+ *
+ *
+ * -------------------------------------------------------------------------
+ *
+ * Copyright (C) 2010-2017  (see AUTHORS file for a list of contributors)
+ *
+ * GNSS-SDR is a software defined Global Navigation
+ *          Satellite Systems receiver
+ *
+ * This file is part of GNSS-SDR.
+ *
+ * GNSS-SDR 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 of the License, or
+ * (at your option) any later version.
+ *
+ * GNSS-SDR 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 GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * -------------------------------------------------------------------------
+ */
+
+#include "fpga_switch.h"
+
+#include <cmath>
+
+// FPGA stuff
+#include <new>
+
+// libraries used by DMA test code and GIPO test code
+#include <stdio.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <errno.h>
+
+// libraries used by DMA test code
+#include <sys/stat.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <assert.h>
+
+// libraries used by GPIO test code
+#include <stdlib.h>
+#include <signal.h>
+#include <sys/mman.h>
+
+// logging
+#include <glog/logging.h>
+
+// string manipulation
+#include <string>
+
+// constants
+#define PAGE_SIZE 0x10000
+#define TEST_REGISTER_TRACK_WRITEVAL 0x55AA
+
+fpga_switch::fpga_switch(std::string device_name)
+{
+    if ((d_device_descriptor = open(device_name.c_str(), O_RDWR | O_SYNC)) == -1)
+        {
+            LOG(WARNING) << "Cannot open deviceio" << device_name;
+            printf("switch memory successfully mapped\n");
+        }
+    d_map_base = reinterpret_cast<volatile unsigned *>(mmap(NULL, PAGE_SIZE,
+            PROT_READ | PROT_WRITE, MAP_SHARED, d_device_descriptor, 0));
+
+    if (d_map_base == reinterpret_cast<void*>(-1))
+        {
+            LOG(WARNING) << "Cannot map the FPGA switch module into tracking memory";
+            printf("could not map switch memory\n");
+        }
+
+    // sanity check : check test register
+    unsigned writeval = TEST_REGISTER_TRACK_WRITEVAL;
+    unsigned readval;
+    readval = fpga_switch::fpga_switch_test_register(writeval);
+    if (writeval != readval)
+        {
+            LOG(WARNING) << "Test register sanity check failed";
+        }
+    else
+        {
+            LOG(INFO) << "Test register sanity check success !";
+        }
+
+    DLOG(INFO) << "Switch FPGA class created";
+}
+
+fpga_switch::~fpga_switch()
+{
+    close_device();
+}
+
+void fpga_switch::set_switch_position(int switch_position)
+{
+    d_map_base[0] = switch_position;
+}
+
+unsigned fpga_switch::fpga_switch_test_register(
+        unsigned writeval)
+{
+    unsigned readval;
+    // write value to test register
+    d_map_base[3] = writeval;
+    // read value from test register
+    readval = d_map_base[3];
+    // return read value
+    return readval;
+}
+
+void fpga_switch::close_device()
+{
+    unsigned * aux = const_cast<unsigned*>(d_map_base);
+    if (munmap(static_cast<void*>(aux), PAGE_SIZE) == -1)
+        {
+            printf("Failed to unmap memory uio\n");
+        }
+
+    close(d_device_descriptor);
+}
+    
+

src/algorithms/signal_source/libs/fpga_switch.h

@@ -0,0 +1,61 @@
+/*!
+ * \file fpga_switch.h
+ * \brief Switch that connects the HW accelerator queues to the analog front end or the DMA.
+ * \authors <ul>
+ * 			<li> Marc Majoral, 2017. mmajoral(at)cttc.cat
+ *          <li> Javier Arribas, 2016. jarribas(at)cttc.es
+ *          </ul>
+ *
+ * Class that controls a switch in the FPGA
+ *
+ *
+ * -------------------------------------------------------------------------
+ *
+ * Copyright (C) 2010-2017  (see AUTHORS file for a list of contributors)
+ *
+ * GNSS-SDR is a software defined Global Navigation
+ *          Satellite Systems receiver
+ *
+ * This file is part of GNSS-SDR.
+ *
+ * GNSS-SDR 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 of the License, or
+ * (at your option) any later version.
+ *
+ * GNSS-SDR 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 GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * -------------------------------------------------------------------------
+ */
+
+#ifndef GNSS_SDR_FPGA_SWITCH_H_
+#define GNSS_SDR_FPGA_SWITCH_H_
+
+#include <gnuradio/block.h>
+
+#define MAX_LENGTH_DEVICEIO_NAME 50
+
+class fpga_switch
+{
+public:
+    fpga_switch(std::string device_name);
+    ~fpga_switch();
+    void set_switch_position(int switch_position);
+	
+private:
+    int d_device_descriptor; // driver descriptor
+    volatile unsigned *d_map_base; // driver memory map
+
+    // private functions
+    unsigned fpga_switch_test_register(unsigned writeval);
+	void close_device(void);
+	
+};
+
+#endif /* GNSS_SDR_FPGA_SWITCH_H_ */