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…
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…
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…
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…
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-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…
Direct AXI Stream Connection Between GIC-500 and Cortex-A53 When integrating ARM IPs such as the GIC-500 and Cortex-A53, the typical approach involves using an interconnect fabric to manage communication between the components. However, in some cases, designers may wish to establish a direct connection between these IPs without an intermediary interconnect. This scenario arises when…
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…
PVBus Master Ports Not Generated in Simgen with AMBAPVACE Protocol When attempting to utilize the auto bridging feature in Simgen for the AMBAPVACE protocol, the PVBus master ports are not generated as expected. This issue arises specifically when configuring the master bridge for the PVBus protocol to use the PVBus2AMBAPVACE bridge in the JSON configuration…
Watchdog Timer Counts Down but HPS Fails to Reboot After Warm Reset The issue at hand involves the Cyclone V Hard Processor System (HPS) failing to reboot after a watchdog timer triggers a warm reset in a baremetal application. The watchdog timer is configured to count down and initiate a warm reset, but instead of…