USB Error Codes

NOTE

This topic describes only module-specific error codes. For details about universal error codes, see Universal Error Codes.

14400001 USB Device Connection Denied

Error Message

Access right denied. Call requestRight to get the USBDevicePipe access right first.

Description

This error code is reported if a certain API of the USB module is called but the required permission is not granted.

Possible Causes

The permission to access the USB device is not granted.

Solution

Call requestRight to request for the permission to access the USB device.

14400002 HDC Disabled

Error Message

Permission denied. The HDC is disabled by the system.

Description

This error code is reported if HDC is disabled by the system.

Possible Causes

The USB debugging permission is not granted.

Solution

Apply for the USB debugging permission.

14400003 Port Role Switching Unsupported

Error Message

Unsupported operation. The current device does not support port role switching.

Description

This error code is reported if the port role is switched.

Possible Causes

The port role is incorrect.

Solution

Use the correct port role.

14400004 Service Exception

Error Message

Service exception. Possible causes: No accessory is plugged in.

Description

This error code is reported if the service is abnormal.

Possible Causes

No accessory is inserted.

Solution

Insert the accessory.

14400005 Database Operation Exception

Error Message

Database operation exception.

Description

This error code is reported if the database operation is abnormal.

Solution

Call the API again.

14400006 USB Device Function Unsupported

Error Message

Unsupported operation. The function is not supported.

Description

This error code is reported if the unsupported USB device function is used.

Possible Causes

The USB device function is not supported.

Solution

Use the correct USB device function.

14401001 Target USB Accessory Unmatched

Error Message

The target USBAccessory not matched.

Description

This error code is reported if the target USB accessory does not match the device.

Solution

Call getAccessoryList to obtain the accessory list and use a matched USB accessory to try again.

14401002 Failed to Open the Native Accessory Node

Error Message

Failed to open the native accessory node.

Description

This error code is reported if the attempt to open the native accessory node fails.

Solution

Call the API again.

14401003 Accessory Opened Repeatedly

Error Message

Cannot reopen the accessory.

Description

This error code is reported if an accessory is opened repeatedly.

Solution

The accessory has been opened. Continue to perform subsequent operations.

14400007 Resource Busy

Error Message

Resource busy. Possible causes: 1. The transfer has already been submitted. 2. The interface is claimed by another program or driver.

Description

This error code is reported if the requested resource is in use.

Possible Causes

The transmission task has been submitted.
The API is occupied by another program or driver.

Solution

Check whether usbManager.claimInterface is successfully called.

14400008 No Device (Disconnected)

Error Message

No such device (it may have been disconnected).

Description

This error code is reported if the device cannot be identified.

Solution

Check whether the device type is correct and whether the device is successfully connected.

14400009 Insufficient Memory

Error Message

Insufficient memory. Possible causes: 1. Memory allocation failed.

Description

This error code is reported if no memory is available when being requested. The maximum data size is 1 KB for a single transfer.

Possible Causes

The memory usage is too high to allocate sufficient space to the current task.

Solution

Clear memory in a timely manner.

14400010 Unrecognized Error

Error Message

Other USB error. Possible causes: Unrecognized discard error code.

Description

This error code is reported if an unknown error occurs.

Solution

Correct the error by referring to the related documentation, and try again.

14400011 No Ongoing Transfer Found

Error Message

The transfer is not in progress, or is already complete or cancelled.

Description

This error code is reported if the current data transfer has been canceled or completed.

Solution

Initiate a new data transfer request.

14400012 I/O Error

Error Message

Transmission I/O error.

Description

This error code is reported when the read/write operation fails due to the abnormal I/O channel.

Solution

Try again.

14400013 Parameter Validity Check Failed

Error Message

The USBDevicePipe validity check failed. Possible causes: 1. The input parameters fail the validation check. 2. The call chain used to obtain the input parameters is not reasonable.

Description

This error code is reported if the parameter validity check fails.

Possible Causes

The validity check of the input parameter fails.
The input parameter call chain is improper.

Solution

Use a proper call chain to obtain the input parameter.

31400001 Serial Port Service Error

Error Message

Serial port management exception.

Description

This error code is reported if the serial port service is abnormal.

Possible Causes

The process exits due to a program exception.

Solution

Check whether the device is connected, and obtain the correct serial port number from the serial port list.

31400002 No Serial Port Device Access Permission

Error Message

Access denied. Call requestSerialRight to request user authorization first.

Description

This error code is reported if you do not have the permission to access the serial port device.

Possible Causes

You have not applied for the permission to access the serial port device.

Solution

Call requestSerialRight to apply for the access permission.

31400003 Port Number Not Exist

Error Message

PortId does not exist.

Description

This error code is reported if the port number does not exist.

Possible Causes

The original port number becomes invalid because the device connection is abnormal.

Solution

Remove and insert the device, and try again.

31400004 Port in Use

Error Message

The serial port device is occupied.

Description

This error code is reported if the serial port device is occupied.

Possible Causes

The serial port device is enabled repeatedly.

Solution

Remove and insert the device, and try again.

31400005 Device Not Opened

Error Message

The serial port device is not opened. Call the open API first.

Description

This error code is reported if the serial port device is not opened.

Possible Causes

A device has not been opened.

Solution

Call the Open API to open the device before performing subsequent operations.

31400006 Data Transfer Timeout

Error Message

Data transfer timed out.

Description

This error code is reported if data transfer times out.

Possible Causes

The peer end does not send data.

Solution

Check whether the peer device initiates data transfer.

31400007 I/O Exception

Error Message

I/O exception.Possible causes: 1. The transfer was canceled. 2. The device offered more data than allowed.

Description

This error code is reported if an I/O exception occurs.

Possible Causes

The transfer task is canceled abnormally.
The amount of received data in a single transfer exceeds the buffer size limit.

Solution

Adjust the buffer size properly, and perform data transfer again.