Undefined Length Burst Termination and BUSY Signal Behavior in AHB Lite In the context of ARM AHB Lite protocol, the use of undefined length bursts and BUSY signal behavior can lead to intricate timing and protocol compliance issues. The primary concern revolves around the correct interpretation of address and data phases during burst termination with…
AXI Transaction Reordering Behavior with Depth = 4 In the context of ARM’s AMBA AXI protocol, the reordering depth of a slave interface defines its ability to handle multiple outstanding transactions concurrently and potentially reorder their completion responses. When the reordering depth is set to 4, the slave can process up to four transactions simultaneously,…
Enabling ARMv8.3 PAC and ARMv8.5 MTE on AEMv8-A Base Platform RevC FVP The AEMv8-A Base Platform RevC FVP is a powerful tool for simulating ARM-based systems, particularly for developers working on custom Linux kernels that leverage advanced ARM architecture features such as ARMv8.3 Pointer Authentication (PAC) and ARMv8.5 Memory Tagging Extension (MTE). These features are…
PRIMASK Bit Set but Systick Interrupts Persist The issue revolves around the ARM Cortex-M0 processor’s PRIMASK register, which is intended to disable all interrupts except for Non-Maskable Interrupts (NMIs). The user successfully sets the PRIMASK bit to 1 using the __set_PRIMASK(1) function, which is confirmed by reading the PRIMASK value using __get_PRIMASK(). However, despite the…
SysTick Timer Configuration and Interrupt Handling in ARM Cortex-M0 The SysTick timer is a fundamental peripheral in ARM Cortex-M0 microcontrollers, designed to provide a simple and efficient way to generate periodic interrupts. The timer operates by counting down from a reload value (SYST_RVR) to zero, at which point it can trigger an interrupt if configured…
AxCACHE[1] Modifiable Bit and Non-Modifiable Transaction Rules The AxCACHE[1] signal in the AXI4 protocol, often referred to as the "Modifiable" bit, plays a critical role in determining whether certain attributes of a transaction can be altered by the interconnect or other components in the system. When AxCACHE[1] is set to 0, the transaction is marked…
ARM Cortex-A Series for Real-Time Oscillator Emulation and UI Rendering The core challenge in designing a digital-analog hybrid synthesizer lies in selecting an ARM processor capable of handling real-time oscillator emulation, UI rendering, and interfacing with analog signal paths, FPGAs, and DSPs. The oscillator emulation requires low-latency processing for wavetable, virtual analog, FM, sample/granular, and…
ARM Cortex-M0+ DSM Integration Challenges in VCS Simulation The integration of ARM Cortex-M0+ Design Sign-off Models (DSMs) into a VCS simulation environment presents unique challenges, particularly when transitioning from Cadence to Synopsys toolchains. The core issue revolves around the proper configuration of Program Language Interface (PLI) commands in VCS to enable seamless interaction with the…
Cortex-M33 FVP Register Access Hard Fault Due to Memory Map Mismatch The issue at hand involves a hard fault occurring during register access while debugging a Cortex-M33-based firmware using the Fixed Virtual Platform (FVP). The firmware is developed for the LPCXpresso55S28 board, which features an NXP LPC55S28 microcontroller with a Cortex-M33 core. The hard fault…
ARM Cortex-M4 Cache Coherency Problems During DMA Transfers The issue described revolves around the Keil Pack Installer failing to update or download packs, specifically the STM32F3xx_DFP pack, and the subsequent absence of the STM family in the device database. This problem manifests in two primary ways: the Pack Installer displays a general error when attempting…