FAQs Overview

FAQs are used to help developers solve problems frequently encountered during development. They cover a wide range of topics.

Environment Setup

Mini and Small Systems

• hb installation

  • Garbled Characters and Segmentation Faults

  • "cannot import 'sysconfig' from 'distutils'"

  • "module 'platform' has no attribute 'linux_distribution'"

  • "Could not find a version that satisfies the requirement ohos-build"

• Python3 Installation

  • "configure: error: no acceptable C compiler found in $PATH"

  • "-bash: make: command not found"

  • "zlib not available"

  • "No module named '_ctypes'"

• lsb_release Error During kconfiglib Installation

• "ImportError: No module named apt_pkg"

Compilation and Building

Mini and Small Systems

• "usr/sbin/ninja: invalid option -- w"

• "/usr/bin/ld: cannot find -lncurses"

• "line 77: mcopy: command not found"

• "riscv32-unknown-elf-gcc: error trying to exec 'cc1': execvp: No such file or directory"

• "No module named 'Crypto'"

• "xx.sh : xx unexpected operator"

• "Could not find a version that satisfies the requirement six>=1.9.0"

• "cannot find -lgcc"

• Failed to Find Python

• Failed to Find Python 3

Burning

Mini and Small Systems

• "Error: Opening COMxx: Access denied" Displayed When I Start Burning

• The Image Failed To Be Burnt

• No Command Output Is Displayed

• Windows-based PC Failed to Be Connected to the Board

Kernel

Basic Kernel

• What are the differences between APIs provided by LiteOS-A and LiteOS-M?

• How do I analyze thread stack overflow?

File System

• What should I do when the Hi3516 board fails to open the same file in write mode (LiteOS-A)?

Chip Adaptation

• What hardware platforms are supported by the LiteOS kernel?

• What chip architectures are supported by the LiteOS kernel?

Third-party Components

• Which third-party components are supported?

• What should I do if the key length verification fails when OpenSSL is used?

• Does setsockopt support SO_RCVBUF and SO_SNDBUF?

Compilation and Linking

• How do I run an application developed by ARM Linux on LiteOS-A?

• What operating system is used for compilation? What compiler is used?

• For a third-party component that is independently compiled into a static library and used on LiteOS-M, what should I do when the component's global variable value is incorrect or the system is suspended after the component's function is called?

• What should I do if the message "use VFP register arguments, xxx.o does not" is displayed when LiteOS-A generates a target executable file?

• What should I do when calling clock_gettime obtains an incorrect time?

Porting

• How Do I Mount the Heap Memory to the Kernel?

Startup and Recovery

• System Startup Interrupted Due to "parse failed!" Error

• System Restarted Repeatedly

• Failed to Call the SetParameter or GetParameter API with Correct Parameter Values

System Applications

Utils

• Failure in running the KV store on the LiteOS-A kernel (Hi3516 or Hi3518) due to incorrect path setting for the KV store

Visual Applications

• Is there a global variable that can be accessed by all pages?

• How do I obtain DOM elements?

• How do I pass values between pages?

• How do I scroll a list to an item?

• Does the component support multiple lines?

• Why is a component not displayed?

• How do I implement scrolling on a page?

• Why do not the left and top attributes take effect?

• Why does not dynamic binding take effect?

• How do I implement relative and absolute positioning?

• How do I display or hide a component?

• What are the precautions for using the Margin attribute?

• What are the precautions for event subscription?

• What are the precautions for using dynamic binding?

• How does the loop attribute take effect for ?

• What are the precautions for using an array?

hdc

• hdc_std Failed to Connect to a Device

• hdc_std Failed to Run