ARM Cortex-M4 Debug Interface Initialization Failure The error message "Stellaris ICDI Error: Could not initialize target device! Please power cycle the board and try again" is a common issue encountered when working with the TM4C1294XL evaluation board using the Keil IDE and the onboard Stellaris In-Circuit Debug Interface (ICDI). This error typically occurs during the…
Cortex-R Longer Pipelines and Real-Time Interrupt Latency Challenges The ARM Cortex-R series, designed for real-time applications, features longer pipelines compared to the Cortex-M series. While Cortex-M processors typically employ a 3-stage pipeline, Cortex-R processors, such as the R4 and R7, utilize 8-stage and 11-stage pipelines, respectively. This architectural difference raises questions about the impact of…
ARM Cortex-M55 Freeze on Entry to main() at -O0 Optimization Level The issue at hand involves the ARM Corstone SSE-300 MPS3 simulator freezing upon entry to the main() function when the code is compiled with the -O0 optimization level. This behavior is particularly perplexing because the same code executes without issues when compiled with -O3…
ARMv7l PyArmNN Backend Support Error on 32-bit Debian Stretch The issue at hand revolves around the inability of PyArmNN to utilize supported backends (CpuACC and CpuRef) on a 32-bit ARMv7l architecture running Debian Stretch 9. The error message indicates that none of the backends are supported, which prevents the execution of a Python-based fire detection…
AHB5 Slave Response to HNONSEC Signal in Trusted and Untrusted Scenarios The behavior of an AHB5 slave when receiving transactions with the HNONSEC signal depends on whether the slave is a trusted peripheral or not, as well as the value of the HNONSEC signal itself. The HNONSEC signal is a critical component of the ARM…
Standard C Library Functions Execution in External Flash Causing Performance Bottlenecks In ARM-based SoC designs, the execution of standard C library functions such as memcpy, sin, and others in external flash memory can lead to significant performance degradation. This is primarily due to the slower access times and higher latency associated with external flash compared…
AMBA AHB Lite Four-Beat Wrapping Burst Address Sequence Anomaly The AMBA AHB Lite protocol is widely used in ARM-based SoC designs for its simplicity and efficiency in handling data transfers between masters and slaves. One of the key features of AHB Lite is its support for burst transfers, which allow multiple data transactions to occur…
Understanding the fclk and tck Clock Domains in ARM SoCs In ARM-based System-on-Chip (SoC) designs, clock domain crossing (CDC) between functional clocks (fclk) and test clocks (tck) is a critical aspect of timing closure and functional correctness. The fclk domain typically operates at the system’s functional frequency, while the tck domain is used for test…
ACE Snoop Transactions and Cache Coherency in ARM-Based SoCs In ARM-based SoCs, the Advanced Extensible Interface (AXI) Coherency Extensions (ACE) protocol plays a critical role in maintaining cache coherency across multiple masters and shared memory regions. ACE snoop transactions are a fundamental mechanism for ensuring that all caches in the system have a consistent view…
NiC-400 Read/Write Acceptance Configuration and FIFO Allocation The NiC-400 interconnect is a highly configurable and scalable interconnect IP from ARM, designed to facilitate efficient communication between multiple initiators and targets in an ARM-based SoC. One of the key features of the NiC-400 is its ability to manage read and write transactions with configurable acceptance and…