Further progress,
- I implement code that register libusb_get_pollfds to my event loop.
- I send 6 bytes with libusb_fill_bulk_transfer/libusb_submit_transfer
- I then get notify that libusb fd change
- I call libusb_handle_events
- But my callback is not called. The one that was registered to
libusb_fill_bulk_transfer?
-If I try to call the libusb_handle_events twice I get my callback called?
What am I doing wrong?
See output:
libusb:debug [libusb_init]
libusb:debug [find_usbfs_path] found usbfs at /dev/bus/usb
libusb:debug [op_init] bulk continuation flag supported
libusb:debug [op_init] found usb devices in sysfs
libusb:debug [usbi_add_pollfd] add fd 6 events 1
libusb:debug [usbi_io_init] using timerfd for timeouts
libusb:debug [usbi_add_pollfd] add fd 8 events 1
libusb:debug [libusb_init] created default context
libusb:debug [libusb_get_device_list]
libusb:debug [sysfs_scan_device] scan usb1
libusb:debug [sysfs_scan_device] bus=1 dev=1
libusb:debug [enumerate_device] busnum 1 devaddr 1 session_id 257
libusb:debug [enumerate_device] allocating new device for 1/1 (session 257)
libusb:debug [sysfs_scan_device] scan usb2
libusb:debug [sysfs_scan_device] bus=2 dev=1
libusb:debug [enumerate_device] busnum 2 devaddr 1 session_id 513
libusb:debug [enumerate_device] allocating new device for 2/1 (session 513)
libusb:debug [sysfs_scan_device] scan 1-1
libusb:debug [sysfs_scan_device] bus=1 dev=2
libusb:debug [enumerate_device] busnum 1 devaddr 2 session_id 258
libusb:debug [enumerate_device] allocating new device for 1/2 (session 258)
libusb:debug [sysfs_scan_device] scan 2-1
libusb:debug [sysfs_scan_device] bus=2 dev=2
libusb:debug [enumerate_device] busnum 2 devaddr 2 session_id 514
libusb:debug [enumerate_device] allocating new device for 2/2 (session 514)
libusb:debug [sysfs_scan_device] scan 2-2
libusb:debug [sysfs_scan_device] bus=2 dev=3
libusb:debug [enumerate_device] busnum 2 devaddr 3 session_id 515
libusb:debug [enumerate_device] allocating new device for 2/3 (session 515)
libusb:debug [sysfs_scan_device] scan 2-2.1
libusb:debug [sysfs_scan_device] bus=2 dev=4
libusb:debug [enumerate_device] busnum 2 devaddr 4 session_id 516
libusb:debug [enumerate_device] allocating new device for 2/4 (session 516)
libusb:debug [libusb_get_device_descriptor]
libusb:debug [libusb_get_device_descriptor]
libusb:debug [libusb_get_device_descriptor]
libusb:debug [libusb_open] open 1.2
libusb:debug [op_open] opening /dev/bus/usb/001/002
libusb:debug [usbi_add_pollfd] add fd 9 events 4
libusb:debug [libusb_claim_interface] interface 1
libusb:debug [libusb_set_interface_alt_setting] interface 1 altsetting 0
libusb:debug [libusb_submit_transfer] arm timerfd for timeout in 2000ms (first
in line)
libusb:debug [libusb_handle_events_timeout_completed] doing our own event
handling
libusb:debug [handle_events] poll() 3 fds with timeout in 60000ms
libusb:debug [handle_events] poll() returned 1
libusb:debug [reap_for_handle] urb type=2 status=0 transferred=1
libusb:debug [handle_control_completion] handling completion status 0
libusb:debug [disarm_timerfd]
libusb:debug [ctrl_transfer_cb] actual_length=1
libusb:debug [libusb_submit_transfer] arm timerfd for timeout in 2000ms (first
in line)
libusb:debug [libusb_handle_events_timeout_completed] doing our own event
handling
libusb:debug [handle_events] poll() 3 fds with timeout in 60000ms
libusb:debug [handle_events] poll() returned 1
libusb:debug [reap_for_handle] urb type=2 status=0 transferred=0
libusb:debug [handle_control_completion] handling completion status 0
libusb:debug [disarm_timerfd]
libusb:debug [ctrl_transfer_cb] actual_length=0
libusb:debug [libusb_clear_halt] endpoint 6
libusb:debug [libusb_clear_halt] endpoint 88
--> MyEventLoop Register FD: 6
--> MyEventLoop Register FD: 8
--> MyEventLoop Register FD: 9
--> MyEventLoop catch event on fd:3
--> MyEventLoop catch event on fd:12
--> MyApplicationSendData: 6
<-- SEND DATA
libusb:debug [submit_bulk_transfer] need 1 urbs for new transfer with length 6
libusb:debug [libusb_submit_transfer] arm timerfd for timeout in 2000ms (first
in line)
--> MyEventLoop catch event on fd:12
--> MyEventLoop catch event on fd:8
<-- GET NOTIFY
-> MyEventLoop call libusb_handle_events once
<-- CALL LIBUSB ONCE
libusb:debug [libusb_handle_events_timeout_completed] doing our own event
handling
libusb:debug [handle_events] poll() 3 fds with timeout in 60000ms
libusb:debug [handle_events] poll() returned 1
libusb:debug [handle_events] timerfd triggered
libusb:debug [disarm_timerfd]
libusb:debug [libusb_cancel_transfer]
-> MyEventLoop call libusb_handle_events twice
<-- CALL LIBUSB TWICE (if not called it
stop at previous call)
libusb:debug [libusb_handle_events_timeout_completed] doing our own event
handling
libusb:debug [handle_events] poll() 3 fds with timeout in 60000ms
libusb:debug [handle_events] poll() returned 1
libusb:debug [reap_for_handle] urb type=3 status=-2 transferred=0
libusb:debug [handle_bulk_completion] handling completion status -2 of bulk urb
1/1
libusb:debug [handle_bulk_completion] abnormal reap: urb status -2
libusb:debug [handle_bulk_completion] abnormal reap: last URB handled, reporting
libusb:debug [usbi_handle_transfer_cancellation] detected timeout cancellation
libusb:debug [disarm_timerfd]
BulkTransferCallback: length:6, actual length:0
<-- CALLBACK IS CALLED
thx
-KA
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