Arm

The LPC845 is an ARM Cortex M0+ based microcontroller from NXP Semiconductors. It is an extremely low cost and low power microcontroller that is well suited for a wide range of embedded applications. The Cortex M0+ architecture provides good performance while maintaining low power consumption, making it ideal for battery powered and energy sensitive devices….

The osFeature flags in cmsis_os.h allow developers to configure and customize the CMSIS-RTOS API for their specific application requirements. Similarly, Keil RTX provides configuration options to enable or disable certain RTOS features. By setting these configuration options, developers can optimize Keil RTX and reduce memory footprint for resource constrained devices. Keil RTX Configuration Keil RTX…

The osDelay() and osWait() functions are used for creating delays and waiting in embedded systems programmed with Keil RTX. Both functions are useful for implementing timing requirements, synchronization, timeouts, polling loops, and blocking operations. However, there are some key differences between the two that developers should understand. osDelay() The osDelay() function is used to create…

Configuring and optimizing threads and stacks for the Keil RTX real-time operating system (RTOS) when using the ARM Cortex-M0+ microcontroller can improve performance and resource utilization. The key considerations are configuring the number of threads, stack size for each thread, kernel tick frequency, thread priorities, and utilizing stack watermarking. Overview of Keil RTX and Cortex-M0+…

The Cortex-M0+ processor is an ultra low power 32-bit ARM processor optimized for embedded and IoT applications. It provides an efficient way to implement real-time operating systems (RTOS) like Keil RTX to enable multithreading and scheduling on resource constrained devices. The key aspects of using Keil RTX RTOS on Cortex-M0+ are: configuring RTX, creating threads,…

The osDelay() function is used in embedded systems programming on ARM Cortex chips to insert a time delay or pause in program execution. It is part of CMSIS and can be called as osDelay(ms) where ms is the delay period in milliseconds. While osDelay() is simple to use, some common errors can occur that lead…

When developing multithreaded applications using Keil RTX, one important consideration is setting the stack size for each thread appropriately. Choosing a stack size that is too small can lead to stack overflow errors and unpredictable program behavior. On the other hand, setting the stack size much larger than needed wastes valuable RAM resources, especially on…

The Cortex-M0 DesignStart Eval is an evaluation version of ARM’s Cortex-M0 processor targeted at microcontroller applications. It allows developers to evaluate the Cortex-M0 processor before deciding to license and integrate it into their own custom system-on-chip (SoC) designs. Like all ARM processor IP, the Cortex-M0 DesignStart Eval comes with an end user agreement that outlines…

The GNU Arm Embedded Toolchain provides a complete open source toolchain for the Arm Cortex-M family of processors. The GNU compiler for Arm (GCC) offers various levels of optimization that can significantly improve the performance and code size of applications running on Cortex-M0/M1 microcontrollers. Overview of Cortex-M0/M1 Processors The Cortex-M0 and Cortex-M1 processors are Arm’s…

The GNU ARM Embedded Toolchain provides a robust set of tools for developing, testing, and debugging ARM Cortex-M0/M1 based applications. One of the key features it offers is the ability to perform comprehensive code safety assessments using the GNU-ARM tools included in the toolchain. Code safety refers to detecting potential bugs, errors or vulnerabilities in…