path: root/host/utils/b2xx_side_channel.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# Copyright 2013-2015 Ettus Research LLC
#
# This program 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.
#
# This program 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, see <http://www.gnu.org/licenses/>.
#

import sys
import time
import struct

from optparse import OptionParser

try:
    import usb.core
    import usb.util
except Exception as e:
    print "Failed to import module 'usb'."
    print "Please make sure you have PyUSB installed and in your PYTHONPATH."
    print "PyUSB PyPI website: https://pypi.python.org/pypi/pyusb"
    print "To install, download from the website or use 'pip install pysusb'"
    exit(1)

import serial

VRT_OUT = usb.util.CTRL_TYPE_VENDOR | usb.util.CTRL_OUT
VRT_IN = usb.util.CTRL_TYPE_VENDOR | usb.util.CTRL_IN

VRQS = {}
B200_VREQ_GET_LOG                 = 0x23
VRQS[B200_VREQ_GET_LOG]           = 'B200_VREQ_GET_LOG'
B200_VREQ_GET_COUNTERS            = 0x24
VRQS[B200_VREQ_GET_COUNTERS]      = 'B200_VREQ_GET_COUNTERS'
B200_VREQ_CLEAR_COUNTERS          = 0x25
VRQS[B200_VREQ_CLEAR_COUNTERS]    = 'B200_VREQ_CLEAR_COUNTERS'
B200_VREQ_GET_USB_EVENT_LOG       = 0x26
VRQS[B200_VREQ_GET_USB_EVENT_LOG] = 'B200_VREQ_GET_USB_EVENT_LOG'
B200_VREQ_SET_CONFIG              = 0x27
VRQS[B200_VREQ_SET_CONFIG]        = 'B200_VREQ_SET_CONFIG'
B200_VREQ_GET_CONFIG              = 0x28
VRQS[B200_VREQ_GET_CONFIG]        = 'B200_VREQ_GET_CONFIG'
B200_VREQ_GET_USB_SPEED           = 0x80
VRQS[B200_VREQ_GET_USB_SPEED]     ='B200_VREQ_GET_USB_SPEED'
B200_VREQ_WRITE_SB                = 0x29
VRQS[B200_VREQ_WRITE_SB]          = 'B200_VREQ_WRITE_SB'
B200_VREQ_SET_SB_BAUD_DIV         = 0x30
VRQS[B200_VREQ_SET_SB_BAUD_DIV]   = 'B200_VREQ_SET_SB_BAUD_DIV'
B200_VREQ_FLUSH_DATA_EPS          = 0x31
VRQS[B200_VREQ_FLUSH_DATA_EPS]    = 'B200_VREQ_FLUSH_DATA_EPS'
B200_VREQ_AD9361_LOOPBACK         = 0x92
VRQS[B200_VREQ_AD9361_LOOPBACK]   = 'B200_VREQ_AD9361_LOOPBACK'

COUNTER_MAGIC                 = 0x10024001
"""
typedef struct Counters {
    int magic;

    DMA_COUNTERS dma_to_host;
    DMA_COUNTERS dma_from_host;

    int log_overrun_count;

    int usb_error_update_count;
    USB_ERROR_COUNTERS usb_error_counters;

    int usb_ep_underrun_count;

    int heap_size;
} COUNTERS, *PCOUNTERS;

typedef struct USBErrorCounters {
    int phy_error_count;
    int link_error_count;

    int PHY_LOCK_EV;
    int TRAINING_ERROR_EV;
    int RX_ERROR_CRC32_EV;
    int RX_ERROR_CRC16_EV;
    int RX_ERROR_CRC5_EV;
    int PHY_ERROR_DISPARITY_EV;
    int PHY_ERROR_EB_UND_EV;
    int PHY_ERROR_EB_OVR_EV;
    int PHY_ERROR_DECODE_EV;
} USB_ERROR_COUNTERS, *PUSB_ERROR_COUNTERS;

typedef struct DMACounters {
    int XFER_CPLT;
    int SEND_CPLT;
    int RECV_CPLT;
    int PROD_EVENT;
    int CONS_EVENT;
    int ABORTED;
    int ERROR;
    int PROD_SUSP;
    int CONS_SUSP;

    int BUFFER_MARKER;
    int BUFFER_EOP;
    int BUFFER_ERROR;
    int BUFFER_OCCUPIED;

    int last_count;
    int last_size;

    int last_sid;
    int bad_sid_count;

    int resume_count;
} DMA_COUNTERS, *PDMA_COUNTERS;
"""
DMA_COUNTERS = [
    'XFER_CPLT',
    'SEND_CPLT',
    'RECV_CPLT',
    'PROD_EVENT',
    'CONS_EVENT',
    'ABORTED',
    'ERROR',
    'PROD_SUSP',
    'CONS_SUSP',

    'BUFFER_MARKER',
    'BUFFER_EOP',
    'BUFFER_ERROR',
    'BUFFER_OCCUPIED',

    'last_count',
    'last_size',

    'last_sid',
    'bad_sid_count'
]

USB_ERROR_COUNTERS = [
    'phy_error_count',
    'link_error_count'
]

USB_PHY_ERROR_REGISTERS = [
    'PHY_LOCK_EV',
    'TRAINING_ERROR_EV',
    'RX_ERROR_CRC32_EV',
    'RX_ERROR_CRC16_EV',
    'RX_ERROR_CRC5_EV',
    'PHY_ERROR_DISPARITY_EV',
    'PHY_ERROR_EB_UND_EV',
    'PHY_ERROR_EB_OVR_EV',
    'PHY_ERROR_DECODE_EV'
]

USB_ERROR_COUNTERS += USB_PHY_ERROR_REGISTERS

COUNTERS = [
    'magic',

    ('dma_to_host', DMA_COUNTERS),
    ('dma_from_host', DMA_COUNTERS),

    'log_overrun_count',

    'usb_error_update_count',
    ('usb_error_counters', USB_ERROR_COUNTERS),

    'usb_ep_underrun_count',

    'heap_size',

    'resume_count'
]

USB_EVENTS = {}
USB_EVENTS[0x01] = ('CYU3P_USB_LOG_VBUS_OFF'          , 'Indicates VBus turned off.')
USB_EVENTS[0x02] = ('CYU3P_USB_LOG_VBUS_ON'           , 'Indicates VBus turned on.')
USB_EVENTS[0x03] = ('CYU3P_USB_LOG_USB2_PHY_OFF'      , 'Indicates that the 2.0 PHY has been turned off.')
USB_EVENTS[0x04] = ('CYU3P_USB_LOG_USB3_PHY_OFF'      , 'Indicates that the 3.0 PHY has been turned off.')
USB_EVENTS[0x05] = ('CYU3P_USB_LOG_USB2_PHY_ON'       , 'Indicates that the 2.0 PHY has been turned on.')
USB_EVENTS[0x06] = ('CYU3P_USB_LOG_USB3_PHY_ON'       , 'Indicates that the 3.0 PHY has been turned on.')
USB_EVENTS[0x10] = ('CYU3P_USB_LOG_USBSS_DISCONNECT'  , 'Indicates that the USB 3.0 link has been disabled.')
USB_EVENTS[0x11] = ('CYU3P_USB_LOG_USBSS_RESET'       , 'Indicates that a USB 3.0 reset (warm/hot) has happened.')
USB_EVENTS[0x12] = ('CYU3P_USB_LOG_USBSS_CONNECT'     , 'Indicates that USB 3.0 Rx Termination has been detected.')
USB_EVENTS[0x14] = ('CYU3P_USB_LOG_USBSS_CTRL'        , 'Indicates that a USB 3.0 control request has been received.')
USB_EVENTS[0x15] = ('CYU3P_USB_LOG_USBSS_STATUS'      , 'Indicates completion of status stage for a 3.0 control request.')
USB_EVENTS[0x16] = ('CYU3P_USB_LOG_USBSS_ACKSETUP'    , 'Indicates that the CyU3PUsbAckSetup API has been called.')
USB_EVENTS[0x21] = ('CYU3P_USB_LOG_LGO_U1'            , 'Indicates that a LGO_U1 command has been received.')
USB_EVENTS[0x22] = ('CYU3P_USB_LOG_LGO_U2'            , 'Indicates that a LGO_U2 command has been received.')
USB_EVENTS[0x23] = ('CYU3P_USB_LOG_LGO_U3'            , 'Indicates that a LGO_U3 command has been received.')
USB_EVENTS[0x40] = ('CYU3P_USB_LOG_USB2_SUSP'         , 'Indicates that a USB 2.0 suspend condition has been detected.')
USB_EVENTS[0x41] = ('CYU3P_USB_LOG_USB2_RESET'        , 'Indicates that a USB 2.0 bus reset has been detected.')
USB_EVENTS[0x42] = ('CYU3P_USB_LOG_USB2_HSGRANT'      , 'Indicates that the USB High-Speed handshake has been completed.')
USB_EVENTS[0x44] = ('CYU3P_USB_LOG_USB2_CTRL'         , 'Indicates that a FS/HS control request has been received.')
USB_EVENTS[0x45] = ('CYU3P_USB_LOG_USB2_STATUS'       , 'Indicates completion of status stage for a FS/HS control transfer.')
USB_EVENTS[0x50] = ('CYU3P_USB_LOG_USB_FALLBACK'      , 'Indicates that the USB connection is dropping from 3.0 to 2.0')
USB_EVENTS[0x51] = ('CYU3P_USB_LOG_USBSS_ENABLE'      , 'Indicates that a USB 3.0 connection is being attempted again.')
USB_EVENTS[0x52] = ('CYU3P_USB_LOG_USBSS_LNKERR'      , 'The number of link errors has crossed the threshold.')
USB_EVENTS[0x80] = ('CYU3P_USB_LOG_LTSSM_CHG'         , 'Base of values that indicate a USB 3.0 LTSSM state change.')

LTSSM_STATES = {}
LTSSM_STATES[0x00] = ['00000',    "SS.Disabled"]
LTSSM_STATES[0x01] = ['00001',    "Rx.Detect.Reset"]
LTSSM_STATES[0x02] = ['00010',    "Rx.Detect.Active"]
LTSSM_STATES[0x03] = ['00011',    "Rx.Detect.Quiet"]
LTSSM_STATES[0x04] = ['00100',    "SS.Inactive.Quiet"]
LTSSM_STATES[0x05] = ['00101',    "SS.Inactive.Disconnect.Detect"]
LTSSM_STATES[0x06] = ['00110',    "Hot Reset.Active"]
LTSSM_STATES[0x07] = ['00111',    "Hot Reset.Exit"]
LTSSM_STATES[0x08] = ['01000',    "Polling.LFPS"]
LTSSM_STATES[0x09] = ['01001',    "Polling.RxEQ"]
LTSSM_STATES[0x0a] = ['01010',    "Polling.Active"]
LTSSM_STATES[0x0b] = ['01011',    "Polling.Configuration"]
LTSSM_STATES[0x0c] = ['01100',    "Polling.Idle"]
LTSSM_STATES[0x0d] = ['01101',    "(none)"]
#LTSSM_STATES[0x0X] = ['0111X',    "(none)"]
LTSSM_STATES[0x0e] = ['0111X',    "(none)"]
LTSSM_STATES[0x0f] = ['0111X',    "(none)"]
LTSSM_STATES[0x10] = ['10000',    "U0"]
LTSSM_STATES[0x11] = ['10001',    "U1"]
LTSSM_STATES[0x12] = ['10010',    "U2"]
LTSSM_STATES[0x13] = ['10011',    "U3"]
LTSSM_STATES[0x14] = ['10100',    "Loopback.Active"]
LTSSM_STATES[0x15] = ['10101',    "Loopback.Exit"]
LTSSM_STATES[0x16] = ['10110',    "(none)"]
LTSSM_STATES[0x17] = ['10111',    "Compliance"]
LTSSM_STATES[0x18] = ['11000',    "Recovery.Active"]
LTSSM_STATES[0x19] = ['11001',    "Recovery.Configuration"]
LTSSM_STATES[0x1a] = ['11010',    "Recovery.Idle"]
LTSSM_STATES[0x1b] = ['11011',    "(none)"]
#LTSSM_STATES[0x1X] = ['111XX',    "(none)"]
LTSSM_STATES[0x1c] = ['111XX',    "(none)"]
LTSSM_STATES[0x1d] = ['111XX',    "(none)"]
LTSSM_STATES[0x1c] = ['111XX',    "(none)"]
LTSSM_STATES[0x1f] = ['111XX',    "(none)"]
LTSSM_STATES[0x2c] = ['101100',    "Cypress/Intel workaround"]

def _parse_usb_event_log(data):
    l = []
    for d in data:
        if d == 0x14 or d == 0x15 or d == 0x16:    # CTRL, STATUS, ACKSETUP
            continue
        elif (d & 0x80):
            #l += [(USB_EVENTS[0x80][0] + "+%i" % (d & ~0x80), USB_EVENTS[0x80][1])]
            ltssm_key = (d & ~0x80)
            ltssm_val = "(unknown)"
            if LTSSM_STATES.has_key(ltssm_key):
                ltssm_val = LTSSM_STATES[ltssm_key][1]
            ltssm_val = "LTSSM: " + ltssm_val
            l += [(USB_EVENTS[0x80][0] + "+%i" % (d & ~0x80), ltssm_val)]
        elif USB_EVENTS.has_key(d):
            l += [USB_EVENTS[d]]
        #else:
        #    l += [("?", "?")]
    return l

class counter_set():
    def __init__(self, counters, name='(top)'):
        self._counters = counters
        self._counter_names = []
        self._name = name
        for c in counters:
            o = 0
            default_value = False
            if isinstance(c, str):
                name = c
                default_value = True
            elif isinstance(c, tuple):
                name = c[0]
                o = counter_set(c[1])
            elif isinstance(c, dict):
                raise Exception('Not implemented yet')
            else:
                raise Exception('Unknown counter format')
            setattr(self, name, o)
            self._counter_names += [(name, default_value)]
        self._fmt_str = self._get_struct_format()

    def _get_struct_format(self):
        fmt_str = ""
        for name, default_value in self._counter_names:
            if default_value:
                fmt_str += "i"
            else:
                o = getattr(self, name)
                fmt_str += o._get_struct_format()
        return fmt_str

    def _update(self, data, parents=[]):
        if len(data) == 0:
            raise Exception('Ran out of data entering %s' % (self._name))
            #return []
        for name, default_value in self._counter_names:
            if default_value:
                if len(data) == 0:
                    raise Exception('Ran out of data setting %s in %s' % (name, self._name))
                setattr(self, name, data[0])
                data = data[1:]
            else:
                o = getattr(self, name)
                data = o._update(data, parents+[self])
        return data

    def update(self, data):
        try:
            vals = struct.unpack(self._fmt_str, data)
            self._update(vals)
        except Exception, e:
            print e

    def __str__(self):
        return self.to_string()

    def to_string(self, parents=[]):
        s = ""
        cnt = 0
        for name, default_value in self._counter_names:
            o = getattr(self, name)
            if default_value:
                if cnt > 0:
                    s += "\t"
                s += "%s: %05i" % (name, o)
                cnt += 1
            else:
                if cnt > 0:
                    s += "\n"
                s += "\t"*(len(parents) + 1)
                s += o.to_string(parents+[self])
                cnt = 0
        s += "\n"
        return s

class usb_device():
    def __init__(self):
        #self.max_buffer_size = 64        # Default to USB2
        self.max_buffer_size = 1024*4    # Apparently it'll frag bigger packets
        self.counters = counter_set(COUNTERS)
        self.timeout = 2000

    def open(self, idVendor, idProduct):
        print "Finding %04x:%04x..." % (idVendor, idProduct)
        self.dev = usb.core.find(idVendor=idVendor, idProduct=idProduct)
        if self.dev is None:
            raise ValueError('Device not found: %04x:%04x' % (idVendor, idProduct))

        self.log_index = 0
        self.log_read_count = 0
        self.usb_event_log_read_count = 0
        self.counters_read_count = 0

        #if self.dev.is_kernel_driver_active(0):
        #    print "Detaching kernel driver..."
        #    self.dev.detach_kernel_driver(0)

        #self.dev.set_configuration()    # This will throw as device is already claimed

        print "Opened %04x:%04x" % (idVendor, idProduct)

        #self.dev.ctrl_transfer(0x21,          0x09,     0,        0,        [0x02,0x02,0x00,0x00,0x00,0x00,0x00,0x00] )
        #self.dev.ctrl_transfer(bmRequestType, bRequest, wValue=0, wIndex=0, data_or_wLength = None,                   timeout = None

        #res = self.dev.ctrl_transfer(VRT_IN, 0x83, 0, 0, 1024)
        # Can give 1024 byte size for IN, result will be actual payload size
        # Invalid VREQ results in usb.core.USBError 32 Pipe error
        #print res

        #res = self.dev.ctrl_transfer(VRT_IN, B200_VREQ_GET_USB_SPEED, 0, 0, 1)
        #self.usb_speed = res[0]
        while True:
            #l = self.vrt_get(B200_VREQ_GET_USB_SPEED)
            l = []
            try:
                l = self.dev.ctrl_transfer(VRT_IN, B200_VREQ_GET_USB_SPEED, 0, 0, 1)
            except usb.core.USBError, e:
                if e.errno == 32:
                    print e
                    sys.exit(0)
            if len(l) > 0:
                self.usb_speed = l[0]
                print "Operating at USB", self.usb_speed
                break
            else:
                print "Retrying..."
        #if self.usb_speed == 3:
        #    self.max_buffer_size = 512
        print "Max buffer size:", self.max_buffer_size
        print

    def _handle_error(self, e, vrt):
        if e.errno == 19:    # No such device
            raise e
        vrt_str = "0x%02x" % (vrt)
        if VRQS.has_key(vrt):
            vrt_str += " (%s)" % (VRQS[vrt])
        print "%s: %s" % (vrt_str, str(e))

    def vrt_get(self, vrt):
        try:
            return self.dev.ctrl_transfer(VRT_IN, vrt, 0, 0, self.max_buffer_size, self.timeout)
        except usb.core.USBError, e:
            self._handle_error(e, vrt)
        return []

    def vrt_set(self, vrt, data=""):
        try:
            return self.dev.ctrl_transfer(VRT_OUT, vrt, 0, 0, data, self.timeout)
        except usb.core.USBError, e:
            self._handle_error(e, vrt)
        return None

    def get_log(self, with_log_index=True):
        lines = []
        raw = self.vrt_get(B200_VREQ_GET_LOG)
        if len(raw) == 0:
            return lines
        if raw[0] == 0:
            return lines
        self.log_read_count += 1
        raw = list(raw)
        last = 0
        while raw[last] != 0:
            try:
                idx = raw.index(0, last)
                self.log_index += 1
                line = "".join(map(chr, raw[last:idx]))
                #print "[%05i %05i] %s" % (self.log_index, self.log_read_count, line)
                if with_log_index:
                    lines += [(self.log_index, line)]
                else:
                    lines += [line]
                last = idx + 1
                if last >= len(raw):
                    break
            except Exception, e:
                print e
                break
        return lines

    def print_log(self):
        lines = self.get_log()
        if len(lines) == 0:
            return
        for l in lines:
            #print l
            print "[%05i %05i] %s" % (l[0], self.log_read_count, l[1])
        print

    def get_counters(self):
        data = self.vrt_get(B200_VREQ_GET_COUNTERS)
        if len(data) == 0:
            return
        self.counters_read_count += 1
        self.counters.update(data)

    def print_counters(self):
        self.get_counters()
        print "[%05i]" % (self.counters_read_count)
        print self.counters

    def get_usb_event_log(self):
        data = self.vrt_get(B200_VREQ_GET_USB_EVENT_LOG)
        if len(data) == 0:
            return []
        if len(data) == self.max_buffer_size:    # ZLP when no new events have been recorded
            return []
        if len(data) > 64:
            raise Exception("USB event log data len = %i" % (len(data)))
        self.usb_event_log_read_count += 1
        return _parse_usb_event_log(data)

    def print_usb_event_log(self):
        l = self.get_usb_event_log()
        if len(l) == 0:
            return
        print "\n".join(map(lambda x: ("[%05i] " % (self.usb_event_log_read_count)) + x[0] + ":\t" + x[1], l))
        print

def run_log(dev, options):
    items = [
        (options.log,            dev.print_log),
        (options.counters,        dev.print_counters),
        (options.usb_events,    dev.print_usb_event_log)
    ]
    items = filter(lambda x: x[0] > 0, items)
    smallest_interval = min(map(lambda x: x[0], items))
    time_now = time.time()
    last = [time_now]*len(items)

    try:
        for i in items:
            if i[0] < 0:
                i[1]()
        while True:
            time_now = time.time()
            cleared = False
            for i in range(len(items)):
                time_last = last[i]
                if time_now < (time_last + items[i][0]):
                    continue
                if options.clear_screen and not cleared:
                    print chr(27) + "[2J"
                    cleared = True
                #print items[i][1]
                items[i][1]()
                last[i] = time.time()
            time.sleep(smallest_interval)
    except KeyboardInterrupt:
        return

def hex_to_int(s):
    radix = 10
    s = s.lower()
    if (len(s) > 1 and s[0] == 'x') or (len(s) > 2 and s[0:2] == "0x"):
        radix = 16
    return int(s, radix)

def recv_serial_data(ser):
    data = ""
    usb_event_log_read_count = 0
    time_start = time.time()
    while True:
        c = ser.read()
        data += c
        #if c == '\n':
        if len(data) >= 2 and data[-2:] == "\r\n":
            time_now_str = "[%06d]" % (int(time.time() - time_start))
            data = data[0:-2]
            if data == "":
                #print "[Received an empty line]"
                print
            elif data[0] == ' ':
                print time_now_str, data[1:]
            elif data[0] == 'U':
                data = data[1:]
                cur_type = 0
                i = 0
                usb_events = []
                while len(data) > 0:
                    c = data[0]

                    if cur_type == 0:
                        if c == 'a':
                            cur_type = 1
                        elif (c >= 'A') and (c <= 'P'):
                            i = ord(c) - ord('A')
                            cur_type = 2
                        else:
                            print time_now_str, "[Unknown type: '%s' (0x%02x) in '%s']" % (c, ord(c), data)

                    elif cur_type == 1:
                        i = ord(c) - ord('a')
                        if (i < 0) or (i >= len(USB_PHY_ERROR_REGISTERS)):
                            print time_now_str, "[Unknown PHY error register index: '%s' (0x%02x) (%d) in '%s']" % (c, ord(c), i, data)
                        else:
                            print time_now_str, USB_PHY_ERROR_REGISTERS[i]
                        cur_type = 0

                    elif cur_type == 2:
                        i2 = ord(c) - ord('A')
                        if (c < 'A') or (c > 'P'):
                            print time_now_str, "[Unknown second USB event part: '%s' (0x%02x) (%d) in '%s']" % (c, ord(c), i2, data)
                        else:
                            i = (i << 4) | i2
                            usb_events += [i]

                        cur_type = 0

                    data = data[1:]

                if len(usb_events) > 0:
                    usb_event_log_read_count += 1
                    l = _parse_usb_event_log(usb_events)
                    print "\n".join(map(lambda x: time_now_str + ("[%05i] " % (usb_event_log_read_count)) + x[0] + ":\t" + x[1], l))
            data = ""

def main():
    parser = OptionParser(usage="%prog: [options]")    #option_class=eng_option,
    parser.add_option("-v", "--vid", type="string", default="0x2500", help="VID [default=%default]")
    parser.add_option("-p", "--pid", type="string", default="0x0020", help="PID [default=%default]")
    parser.add_option("-t", "--tty", type="string", default=None, help="TTY [default=%default]")
    parser.add_option("-c", "--cmd", type="string", default="", help="Command (empty opens prompt)")
    parser.add_option("-n", "--counters", type="float", default="5.0", help="Counter print interval [default=%default]")
    parser.add_option("-l", "--log", type="float", default="0.25", help="Log print interval [default=%default]")
    parser.add_option("-e", "--usb-events", type="float", default="0.25", help="USB event log print interval [default=%default]")
    parser.add_option("-s", "--sb", type="string", default=None, help="Settings Bus write message [default=%default]")
    parser.add_option("-d", "--sb-baud-div", type="int", default=None, help="Settings Bus baud rate divisor [default=%default]")
    parser.add_option("-b", "--sb-baud", type="int", default=None, help="Settings Bus baud rate [default=%default]")
    parser.add_option("-r", "--clear-screen", action="store_true", default=False, help="Clear screen [default=%default]")
    parser.add_option("-R", "--reset-counters", action="store_true", default=False, help="Reset counters [default=%default]")
    parser.add_option("-f", "--flush-data-eps", action="store_true", default=False, help="Flush data endpoints [default=%default]")
    parser.add_option("-L", "--fe-loopback", type="int", default=None, help="Change AD9361 digital loopback [default=%default]")
    (options, args) = parser.parse_args()

    if options.tty is not None and options.tty != "":
        while True:
            try:
                ser = serial.Serial(port=options.tty, baudrate=115200, parity=serial.PARITY_NONE, stopbits=serial.STOPBITS_ONE, bytesize=serial.EIGHTBITS, timeout=None)    # timeout: None (blocking), 0 (non-blocking)
                print "Opened", options.tty
                try:
                    recv_serial_data(ser)
                except KeyboardInterrupt:
                    break
            except Exception as e:
                print e
            break
    else:
        dev = usb_device()
        while True:
            try:
                dev.open(idVendor=hex_to_int(options.vid), idProduct=hex_to_int(options.pid))

                if options.flush_data_eps:
                    dev.vrt_set(B200_VREQ_FLUSH_DATA_EPS)
                if options.sb_baud_div is not None:
                    dev.vrt_set(B200_VREQ_SET_SB_BAUD_DIV, struct.pack('H', options.sb_baud_div))
                if options.sb is not None and len(options.sb) > 0:
                    dev.vrt_set(B200_VREQ_WRITE_SB, " " + options.sb)
                if options.reset_counters:
                    dev.vrt_set(B200_VREQ_CLEAR_COUNTERS)
                if options.fe_loopback is not None:
                    dev.vrt_set(B200_VREQ_AD9361_LOOPBACK, struct.pack('B', int(options.fe_loopback)))
                if len(options.cmd) == 0:
                    run_log(dev, options)
                    pass
                else:
                    pass
                break
            except usb.core.USBError as e:
                if e.errno == 19:    # No such device
                    pass
                print e
                break
    return 0

if __name__ == '__main__':
    main()