static void usbDump(int numPackets)
{
// Setup variables
byte[] packet = new byte[1036];
byte[] packetKBits = new byte[130];
int packetnum = 0;
int tries = 10;
BeagleUsb5000CaptureStatus captureStatus =
BeagleUsb5000CaptureStatus.BG_USB5000_CAPTURE_STATUS_INACTIVE;
uint pretrigAmt = 0;
uint pretrigTotal = 0;
uint capAmt = 0;
uint capTotal = 0;
// Disable VBUS to device
BeagleApi.bg_usb5000_target_power(
beagle, BeagleUsbTargetPower.BG_USB5000_TARGET_POWER_OFF);
// Start the capture
if (BeagleApi.bg_enable(beagle, BeagleProtocol.BG_PROTOCOL_USB) !=
(int)BeagleStatus.BG_OK)
{
Console.Write("error: could not enable USB capture; exiting...\n");
Environment.Exit(1);
}
// Disable VBUS to device
BeagleApi.bg_usb5000_target_power(
beagle, BeagleUsbTargetPower.BG_USB5000_TARGET_POWER_HOST_SUPPLIED);
// Wait for the analyzer to trigger for up to 10 seconds...
while (tries != 0)
{
if (BeagleApi.bg_usb5000_usb3_capture_status(
beagle, 1000, ref captureStatus,
ref pretrigAmt, ref pretrigTotal,
ref capAmt, ref capTotal) !=
(int)BeagleStatus.BG_OK)
{
Console.Write(
"error: could not query capture status; exiting...\n");
Environment.Exit(1);
}
if (captureStatus <= BeagleUsb5000CaptureStatus.
BG_USB5000_CAPTURE_STATUS_PRE_TRIGGER)
{
Console.Write("waiting for trigger...\n");
}
else
{
break;
}
tries--;
}
if (tries == 0)
{
Console.Write("did not trigger, make sure a host and a device " +
"is connected to the analyzer.\n");
Environment.Exit(1);
}
Console.Write(
"index,time(ns),source,event,status,data0 ... dataN(*)\n");
Console.Out.Flush();
// ...then start decoding packets
while (packetnum < numPackets || (numPackets == 0))
{
uint status = 0;
uint events = 0;
ulong timeSop = 0;
ulong timeDuration = 0;
uint timeDataOffset = 0;
BeagleUsb5000Source source =
BeagleUsb5000Source.BG_USB5000_SOURCE_ASYNC;
int length = BeagleApi.bg_usb5000_read(
beagle,
ref status, ref events, ref timeSop, ref timeDuration,
ref timeDataOffset, ref source,
1036, packet, 130, packetKBits);
// Make sure capture is triggered.
if (length == (int)BeagleStatus.BG_CAPTURE_NOT_TRIGGERED)
{
continue;
}
// Check for invalid packet or Beagle error
if (length < 0)
{
Console.Write("error={0:d}\n", length);
break;
}
// Exit if observed end of capture
if (status == BeagleApi.BG_READ_USB_END_OF_CAPTURE)
{
Console.Write("\n");
Console.Write("End of capture\n");
break;
}
// Grab the next packet on a timeout.
if (length == 0 &&
status == BeagleApi.BG_READ_TIMEOUT &&
events == 0)
{
continue;
}
// Print the packet details
Console.Write("{0},", packetnum);
Console.Write("{0},", timestampToNS(timeSop, samplerateKHz));
printSource(source);
Console.Write(",");
printEvents(source, events);
Console.Write(",");
printStatus(source, status);
Console.Write(",");
printPacket(source, packet, packetKBits, length);
Console.Write("\n");
packetnum++;
}
// Stop the capture
BeagleApi.bg_disable(beagle);
}