xiaowenxia/embedded-notes

Features

• Study Guides - Offers a collection of technical study guides for kernel drivers, bootloaders, and embedded software development.
• Curated Review Notes - Provides a curated collection of organized review notes on C programming, chip architectures, and systems development.
• Embedded Linux Study Guides - Provides comprehensive technical notes on kernel drivers, bootloaders, and software development for embedded Linux.
• Linux Kernel Development - Provides comprehensive study materials for Linux kernel module development, drivers, and embedded systems.
• Operating System Internals - Provides educational resources on kernel operations, process management, and memory allocation.
• TCP/IP Socket Programming Guides - Provides a comprehensive educational reference for the layered structure of TCP, UDP, IP, and Ethernet.
• Peripheral Interfacing Guides - Explains the operation and configuration of common peripherals such as UART, I2C, and SPI.
• Socket Networking - Implements standard socket-based communication for establishing secure endpoints and transferring data between hosts.
• C Memory Management - Provides detailed notes on low-level memory allocation and cleanup of buffers within the C language.
• Inter-Process Communication - Implements data exchange between tasks using managed queues and other OS kernel IPC primitives.
• Kernel Architecture References - Offers detailed technical documentation on kernel design, subsystem interaction, and driver development.
• Kernel Configurations - Explains how to define configuration menus and dependency rules to manage kernel features during build.
• Interrupt Handling - Explains the management of hardware exceptions, interrupt vector tables, and priority levels.
• Device Drivers - Provides technical guides on implementing kernel-mode device drivers for memory, logging, and process communication.
• Linux Kernel Internals - Explains Linux kernel internals including system calls, virtual memory mapping, and device driver implementation.
• Process Lifecycle Managers - Details the creation, termination, and synchronization of processes within the operating system.
• Interrupt Vector Handlers - Explains how to implement functions assigned to hardware interrupt vectors for immediate event response in embedded systems.
• Kernel Module Compilation - Provides instructions for building loadable kernel module objects and installing them for dynamic loading.
• Kernel-User Space Interfacing - Documents the mechanisms and boundaries used to transition execution between kernel mode and user mode.
• Linked List Implementations - Implements low-level singly and doubly linked lists for sequential data storage in C.
• Memory-Mapped I/O - Covers hardware interfacing by reading and writing to specific numeric memory addresses to control peripherals.
• Peripheral Hardware Drivers - Documents the implementation and operation of hardware peripheral drivers for I2C, SPI, and UART.
• ARM Linux Cross-Compilation - Provides a comprehensive guide to cross-compiling software for 32-bit ARM Linux targets.
• Real-Time Operating Systems - Details the architecture and implementation of real-time operating systems for resource-constrained hardware.
• System Signal Handling - Guides the definition of custom routines to handle operating system signals and manage asynchronous events.
• Virtual Memory Management - Documents the management of virtual memory pages, protection, and locking within the Linux kernel.
• Virtual Memory Mapping - Documents the process of inserting page table entries to map physical RAM into virtual address spaces.
• C Programming Resources - Provides comprehensive guides and reference materials for software development using the C programming language.
• Source Code Compilers - Details the full compilation pipeline from C source code to executable machine binaries.
• Pointer Memory Management - Provides detailed guidance on manual memory addressing and pointer management for low-level data structures.
• Volatile Register Access - Explains how to use the volatile keyword to ensure accurate hardware register interaction by bypassing compiler optimizations.
• Software Engineering Study Guides - Provides structured study guides covering architectural and systems-level engineering concepts.
• Inter-Process Communication - Provides implementation details for exchanging data between processes using pipes, signals, and message queues.
• IoT Networking Protocols - Documents various IoT communication and management protocols including TCP, UDP, and MQTT.
• ARM Instruction References - Catalogs specialized ARM assembly instructions for synchronization, breakpoint management, and state switching.
• Low Level Tools - Provides a guide to low-level tools for memory management and system-level interaction.
• Shell Scripts - Provides practical notes on writing shell scripts using loops and conditionals to automate development tasks.
• Binary File Inspectors - Includes guides on inspecting symbol tables, sections, and dependencies of compiled binaries.
• Cross-Compilation Toolchains - Includes guides on setting up build environments to generate ARM executable binaries from a host machine.
• Kernel Image Creation - Details the compilation of source code into compressed binaries and bootable kernel images.
• Instruction Set Architecture References - Documents the architectural differences, register sets, and hardware capabilities of ARM Cortex-M cores.
• Technical Interview Preparation - Offers curated study materials on protocols and architectures specifically for technical interview preparation.
• Embedded Systems Preparation - Provides focused study materials for professional evaluations in embedded systems and chip architectures.
• GPU Hardware Acceleration - Details how to modify the kernel and system framework to offload rendering tasks to the GPU.
• Framebuffer Renderers - Explains how to map memory and use character device interfaces to drive low-level framebuffer output.
• Embedded Graphics Libraries - Documents the use of industry-standard rendering libraries for hardware-accelerated visuals on resource-constrained embedded screens.
• MQTT Messaging Integrations - Details how to integrate MQTT messaging for exchanging device status and control commands via a broker.
• Layered Network Stacks - Provides a detailed review of the layered structure and operation of TCP, UDP, IP, and Ethernet.
• Address Resolution Protocols - Explains the process of mapping IP addresses to MAC addresses via network requests and responses.
• Network Layering Models - Analyzes the relationship between networking models, protocols, and hardware across different stack layers.
• Network Protocol References - Provides structured references to networking protocol specifications for IoT and network programming.
• Connection and Session Management - Manages the establishment and termination of reliable communication sessions using handshaking mechanisms.
• Congestion Controllers - Implements flow control and congestion avoidance algorithms to manage TCP network traffic.
• Reliable Transmission Mechanisms - Details the use of sequence numbering and acknowledgments to guarantee ordered and complete data transmission.
• Topic-Based Messaging - Explains how to use topic-based messaging for filtered content delivery between IoT devices.
• Binary Disassemblers - Covers the process of converting binary machine code back into assembly for reverse engineering.
• Binary Image Conversions - Explains how to transform executable files into raw binary images suitable for embedded flash memory.
• Bootloader Architectural Patterns - Maps bootloader source directories to their respective roles in drivers, file systems, and board configurations.
• Boot Sequence Analysis - Traces hardware initialization, RAM loading, and kernel execution to explain the system boot process.
• File System I/O - Details low-level file read and write operations using system calls for synchronous and random access.
• Hardware-Based Memory Protection - Explains the use of Memory Protection Units (MPU) to isolate task data and restrict access permissions.
• System Control Interfaces - Adjusts kernel modules, clock settings, and resource limits via system control interfaces.
• Boot Sequence Tracing - Details the execution flow from system reset and the reset handler to the application entry point.
• Task Priority Management - Covers the creation, deletion, and priority assignment of execution threads for CPU time allocation.
• Priority Inversion Resolution - Details techniques for resolving priority inversion to ensure real-time system stability.
• Timed Execution Delays - Explains the implementation of precise timed execution delays using timers and semaphores.
• Physical Register Mapping - Provides memory addresses and functional descriptions for system control and interrupt registers.
• Const Correctness - Demonstrates how to restrict the modification of variables or objects using constant qualifiers in C.
• Secure Network Communication - Applies encryption and hash algorithms to ensure privacy and authenticity in network communications.
• System Health Monitoring - Details methods for detecting stack overflows and memory allocation failures to monitor system stability.
• Open File Descriptor Monitors - Lists open file descriptors, sockets, and pipes currently used by running system processes.
• Process Memory Monitors - Provides techniques for analyzing process memory maps and environment variables via the proc pseudo-filesystem.

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