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google / gousb

gousb provides low-level interface for accessing USB devices
Apache License 2.0
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why connect printer return code -5? #108

Closed yzzshmily closed 2 years ago

yzzshmily commented 2 years ago

[73.275998] [00002504] libusb: debug [libusb_get_config_descriptor] index 0 003.004 03f0:0e71 Unknown (Hewlett-Packard) Protocol: (Defined at Interface level) [73.268602] [00001f84] libusb: debug [usbi_wait_for_events] WaitForMultipleObjects() returned 258 Configuration 1: [91.193903] [00001f84] libusb: debug [libusb_handle_events_timeout_completed] doing our own event handling

[94.439749] [00001f84] libusb: debug [usbi_wait_for_events] WaitForMultipleObjects() for 2 HANDLEs with timeout in 100ms Interface 0 alternate setting 0 (available endpoints: [0x04(4,OUT) 0x83(3,IN)]) Vendor Specific Class (Vendor Specific Subclass) Vendor Specific Protocol [100.457755] [00001f84] libusb: debug [usbi_wait_for_events] WaitForMultipleObjects() returned 258 ep #4 OUT (address 0x04) bulk [512 bytes] [101.865264] [00001f84] libusb: debug [libusb_handle_events_timeout_completed] doing our own event handling [102.710782] [00001f84] libusb: debug [usbi_wait_for_events] WaitForMultipleObjects() for 2 HANDLEs with timeout in 100ms ep #3 IN (address 0x83) bulk [512 bytes] [104.202269] [00001f84] libusb: debug [usbi_wait_for_events] WaitForMultipleObjects() returned 258

[106.855681] [00001f84] libusb: debug [libusb_handle_events_timeout_completed] doing our own event handling [107.629118] [00001f84] libusb: debug [usbi_wait_for_events] WaitForMultipleObjects() for 2 HANDLEs with timeout in 100ms Interface 1 alternate setting 0 (available endpoints: [0x02(2,OUT) 0x81(1,IN)]) Printer (Printer) Bidirectional [109.364188] [00001f84] libusb: debug [usbi_wait_for_events] WaitForMultipleObjects() returned 258 ep #2 OUT (address 0x02) bulk [512 bytes] [110.560661] [00001f84] libusb: debug [libusb_handle_events_timeout_completed] doing our own event handling ep #1 IN (address 0x81) bulk [512 bytes] [111.084987] [00001f84] libusb: debug [usbi_wait_for_events] WaitForMultipleObjects() for 2 HANDLEs with timeout in 100ms

[117.370625] [00001f84] libusb: debug [usbi_wait_for_events] WaitForMultipleObjects() returned 258 [119.755040] [00000114] libusb: debug [libusb_handle_events_timeout_completed] doing our own event handling [119.760014] [00000114] libusb: debug [usbi_wait_for_events] WaitForMultipleObjects() for 2 HANDLEs with timeout in 100ms [119.753190] [00002504] libusb: debug [libusb_open] open 3.4 [119.760708] [00002504] libusb: debug [libusb_open] open 3.4 returns -5 [143.661979] [00002504] libusb: debug [libusb_unref_device] destroy device 3.4 [143.662941] [00002504] libusb: debug [libusb_get_device_descriptor]
[143.663352] [00002504] libusb: debug [libusb_get_config_descriptor] index 0 [143.663910] [00002504] libusb: debug [libusb_unref_device] destroy device 1.2 [143.664335] [00002504] libusb: debug [libusb_get_device_descriptor] [143.664566] [00002504] libusb: debug [libusb_get_config_descriptor] index 0 [143.664764] [00002504] libusb: debug [parse_endpoint] skipping descriptor 0x30 [143.665015] [00002504] libusb: debug [libusb_get_device_descriptor] [143.665263] [00002504] libusb: debug [libusb_get_config_descriptor] index 0 [143.665562] [00002504] libusb: debug [libusb_get_device_descriptor] [143.665814] [00002504] libusb: debug [libusb_get_config_descriptor] index 0 [143.666130] [00002504] libusb: debug [libusb_unref_device] destroy device 3.2 [143.666416] [00002504] libusb: debug [libusb_get_device_descriptor] [143.666663] [00002504] libusb: debug [libusb_get_config_descriptor] index 0 [143.666888] [00002504] libusb: debug [libusb_unref_device] destroy device 3.3 [143.667398] [00002504] libusb: debug [libusb_unref_device] destroy device 3.0 [143.667917] [00002504] libusb: debug [libusb_get_device_descriptor] [143.668225] [00002504] libusb: debug [libusb_get_config_descriptor] index 0 [143.668513] [00002504] libusb: debug [libusb_unref_device] destroy device 1.0 [143.668785] [00002504] libusb: debug [libusb_get_device_descriptor] [143.669049] [00002504] libusb: debug [libusb_get_config_descriptor] index 0 [143.669335] [00002504] libusb: debug [parse_configuration] skipping descriptor 0xb [143.670164] [00002504] libusb: debug [libusb_unref_device] destroy device 2.1 [143.670475] [00002504] libusb: debug [libusb_unref_device] destroy device 2.0 22-03-09 11:38:17 ERR device.go:51 > OpenDevices(): libusb: not found [code -5]

zagrodzki commented 2 years ago

Sorry, there is not enough information in this question to make any meaningful attempt at answering. All the logs provided are from libusb and generally not relevant to gousb development.