ARM Cortex-R5F Undefined Instruction Exception Due to Divide by Zero The ARM Cortex-R5F processor, when configured to handle floating-point operations, can encounter a divide-by-zero condition during execution. This condition is typically handled by enabling the Divide-by-Zero (DZ) bit in the System Control Register (SCTLR). When the DZ bit is set, the processor raises an Undefined…
ARM Cortex-A53 Exception Level Transition Failure from EL2 to EL1 The ARM Cortex-A53 processor, part of the ARMv8-A architecture, is designed to support multiple exception levels (ELs), which are used to isolate and manage different privilege levels in a system. Exception levels range from EL0 (least privileged, user mode) to EL3 (most privileged, secure monitor…
ARM Cortex-M3 Debug Interface Connectivity Problems The CC2640R2L microcontroller, based on the ARM Cortex-M3 architecture, is a popular choice for low-power wireless applications. However, one of the recurring issues faced by developers is the inability to establish a stable connection with the J-Link debugger. This problem can manifest in various ways, including failure to detect…
Cortex-R52 Based SoC Requirements for Automotive Use Cases The Cortex-R52 processor, designed by ARM, is a highly capable real-time processor that is particularly well-suited for safety-critical applications, such as those found in the automotive industry. When selecting a Cortex-R52 based System on Chip (SoC) for automotive use, several key requirements must be considered to ensure…
ARMv6-M Unprivileged/Privileged Extension: Hardware Configuration and MPU Dependency The ARMv6-M architecture introduces a critical feature known as the Unprivileged/Privileged Extension, which is a hardware configuration option that enables the separation of execution modes into privileged and unprivileged states. This separation is fundamental for implementing robust security and memory protection mechanisms in embedded systems. The extension…
ARM Cortex-M0 Core Debugging: Nuvoton MS51FB9AE Chip Detection Issue The Nuvoton MS51FB9AE microcontroller, based on the ARM Cortex-M0 core, is a popular choice for embedded systems due to its low power consumption and cost-effectiveness. However, during debugging sessions using the Nu-Link Pro debugger, a recurring issue arises where the debugger reports a successful connection but…
Cortex-M3 DesignStart Cycle Model Fails with DSM=Yes in QuestaSim The Cortex-M3 DesignStart Cycle Model is a powerful tool for evaluating and testing ARM Cortex-M3 processor designs. However, when attempting to run tests with the DesignStart evaluation version using the cycle model, users may encounter an error stating "Unsupported operating system" when specifying DSM=yes in QuestaSim….
ARM Helium Vector Swap Intrinsic: Understanding the Core Issue The ARM Helium architecture, also known as the M-Profile Vector Extension (MVE), introduces a powerful set of vector processing capabilities designed to enhance the performance of embedded systems. One of the key features of Helium is its ability to perform operations on vectors, which are essentially…
Incorrect FFT Outputs with CMSIS DSP Library on STM32F4 The issue at hand involves incorrect Fast Fourier Transform (FFT) results when using the ARM CMSIS DSP library on an STM32F4 Discovery board. The user is attempting to compute the FFT of a sinusoidal signal using both the Complex FFT (CFFT) and Real FFT (RFFT) functions…
Incorrect Behavior of vdupq_x_n_f32 with False Predication Flags The issue revolves around the unexpected behavior of the ARM Cortex-M55 Helium intrinsic vdupq_x_n_f32 when used with false predication flags. Specifically, the intrinsic vdupq_x_n_f32 is designed to duplicate a scalar value into a vector register while applying predication. However, in the observed scenario, the intrinsic overwrites the…