ARM Development Boards with Dual MIPI CSI-2 Interfaces When working on embedded systems projects that involve camera integration, particularly in applications like in-vehicle camera systems, the choice of the right development board is crucial. MIPI CSI-2 (Camera Serial Interface 2) is a widely adopted standard for connecting cameras to processors, especially in mobile and automotive…
Memory Allocation Conflicts and System Restart Behavior in Bare-Metal ARM Cortex-A8 Applications The core issue revolves around memory allocation conflicts and unexpected system restarts when running a bare-metal application on an ARM Cortex-A8 processor, specifically on the BeagleBone Black platform. The application is intended to run in a bare-metal environment, initialized by U-Boot as a…
ARM Cortex-M4 Assembly Programming and Toolchain Considerations The ARM Cortex-M4 architecture, as found in the STM32F401-Nucleo board, is a powerful and versatile microcontroller core designed for embedded systems. When starting with ARM architecture, one of the first decisions is whether to begin with assembly language or higher-level languages like C/C++. Assembly language provides a deep…
ARM Cortex-M33 TrustZone Configuration and Secure-Non-Secure Transition Issues The ARM Cortex-M33 processor, as used in the Nucleo L552ZE-Q board, supports ARM TrustZone technology, which provides hardware-enforced isolation between secure and non-secure states. This isolation is crucial for applications requiring robust security, such as IoT devices, where sensitive data and operations must be protected from unauthorized…
ARM Cortex-A53 Bootloader Configuration and Flash Drive Boot Issues When attempting to install Linux on an ARM Cortex-A53-based device, one of the most common issues users encounter is the device failing to boot from a flash drive. This problem can stem from a variety of factors, including incorrect bootloader configuration, incompatible Linux distributions, or hardware-specific…
ARM A133 SPI Device Probe Failure Due to Memory Allocation Issues The ARM A133 processor, part of the Allwinner sun50iw10p1 family, is a powerful SoC often used in embedded systems for its balance of performance and power efficiency. However, during the kernel boot process, users may encounter an error when probing an SPI device, specifically…
Python Code Execution Time and Cycle Count Challenges on ARM Cortex-A53 The task of calculating the execution time and cycle count for Python code running on an ARM Cortex-A53 processor, such as the one found in the Raspberry Pi 3B, presents several unique challenges. Unlike compiled languages like C or C++, Python is an interpreted…
ARM TrustZone World Switching and Cache Coherency Issues ARM TrustZone technology provides a secure execution environment by partitioning the system into Secure and Normal (Non-secure) worlds. This partitioning extends to memory, peripherals, and even CPU states. However, one of the most critical challenges in TrustZone implementations is maintaining cache coherency during world switches. When the…
Cortex-M0+ Delay Routine Inaccuracy Due to Instruction Cycle Miscalculation The Cortex-M0+ is a popular choice for low-power, cost-sensitive embedded systems due to its simplicity and efficiency. However, its lack of advanced features like the Data Watchpoint and Trace (DWT) unit, which includes the cycle counter (CYCCNT), makes implementing precise delays more challenging. In this scenario,…
ARM Cortex-A15 Kernel Module Build Failure Due to Missing Symbol The issue at hand involves a failure during the build process of the Open vSwitch (OVS) kernel module on an ARM Cortex-A15 platform running a Linux kernel version 5.4.167-240. The build process terminates with an error indicating that the symbol rpl_geneve_dev_create_fb is undefined. This symbol…