USB$SDA_HELP.HLB  —  SHOW  REQUEST
   Formats the USB request data structure.  You can display the
   data structure or event tracing information.  The amount of
   tracing data varies from controller to controller.

   Format

      USB SHO REQUEST [address]

1  –  TRACE 

   Show tracing data for the request through the USB layers.  The
   level of detail varies greatly depending upon which host controller
   is being used.

   Format

      USB SHOW REQUEST TRACE [address]

2  –  Examples

2.1  –  Trace 

   This examples show a request block that has been reused.  The next trace
   entry to be written is marked by "Index -->"

 SDA> USB SHOW REQUEST TRACE 896E9CE0
 Structure type                 00000005
                                REQUEST HANDLE
 Request tracing messages:
                   0:  8-SEP-2008 16:12:45.06 - usbd_alloc_request
                   1:  8-SEP-2008 16:12:45.06 - hub_alloc_request
                   2:  8-SEP-2008 16:12:45.06 - hub_port_status
                   3:  8-SEP-2008 16:12:45.06 - usbd_transfer
                   4:  8-SEP-2008 16:12:45.06 - ehci$queue_to_control_endpoint
                   5:  8-SEP-2008 16:12:45.06 - usbd_callback
                   6:  8-SEP-2008 16:12:45.06 - usbd_callback_thread
                   7:  8-SEP-2008 16:12:45.06 - hub_queue_entry_callback
                   8:  8-SEP-2008 16:12:45.06 - hub_port_change
                   9:  8-SEP-2008 16:12:45.06 - usbd_transfer
                  10:  8-SEP-2008 16:12:45.06 - ehci$queue_to_control_endpoint
                  11:  8-SEP-2008 16:12:45.06 - usbd_callback
                  12:  8-SEP-2008 16:12:45.06 - usbd_callback_thread
                  13:  8-SEP-2008 16:12:45.06 - hub_queue_entry_callback
                  14:  8-SEP-2008 16:12:45.06 - hub_port_change
                  15:  8-SEP-2008 16:12:45.06 - hub_request_status
                  16:  8-SEP-2008 16:12:45.06 - usbd_transfer
                  17:  8-SEP-2008 16:12:45.06 - ehci$queue_to_int_endpoint
  Index -->       18:  8-SEP-2008 16:12:44.81 - hub_free_request
                  19:  8-SEP-2008 16:12:44.81 - usbd_free_request
                  20:  8-SEP-2008 16:12:44.41 - ehci$queue_to_control_endpoint
                  21:  8-SEP-2008 16:12:44.41 - ehci$emulate_root_hub
                  22:  8-SEP-2008 16:12:44.41 - ehci$get_port_status
                  23:  8-SEP-2008 16:12:44.41 - usbd_callback
                  24:  8-SEP-2008 16:12:44.41 - usbd_callback_thread
                  25:  8-SEP-2008 16:12:44.41 - hub_queue_entry_callback
                  26:  8-SEP-2008 16:12:44.41 - hub_port_change
                  27:  8-SEP-2008 16:12:44.41 - hub_request_status
                  28:  8-SEP-2008 16:12:44.41 - usbd_transfer
                  29:  8-SEP-2008 16:12:44.41 - ehci$queue_to_int_endpoint
                  30:  8-SEP-2008 16:12:44.41 - ehci$q_to_root_hub_int_endpoint
                  31:  8-SEP-2008 16:12:44.41 - ehci$emulate_root_hub_interrupt
                  32:  8-SEP-2008 16:12:44.42 - ehci$emulate_root_hub_interrupt
                  33:  8-SEP-2008 16:12:44.42 - ehci$emulate_root_hub_interrupt
                  34:  8-SEP-2008 16:12:44.42 - usbd_callback
                  35:  8-SEP-2008 16:12:44.42 - usbd_callback_thread
                  36:  8-SEP-2008 16:12:44.42 - hub_queue_entry_callback
                  37:  8-SEP-2008 16:12:44.42 - hub_status_change
                  38:  8-SEP-2008 16:12:44.42 - hub_free_request
                  39:  8-SEP-2008 16:12:44.42 - usbd_free_request
 SDA>

2.2  –  Data Structure 

 SDA> USB SHOW REQUEST  896E9CE0
 Structure type                 00000005
                                REQUEST HANDLE
 Chained request pointer        00000000
 Pipe address                   896cd890
 Private handle                 ffffffff8968a4d0
 Retry count                    00000000
 Saved Buffer length            00000001
 Buffer address                 896cdfd0
 Buffer system physical address 45511fd0
 Buffer length                  00000000
 Maximum delay                  00000000
 ------ Set up device request -----
 Request type                   000000a3
                                Unknown value
 Request type                   00000000
                                Get status
 Value                          00000000
                                Endponit stall
 Index                          00000003
 Length                         00000004
 ------  End device request  -----
 Device request physical address 45501d0c
 Flags                          00000002
 Status                         07719923
 SDA>
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