Controlling real time during embedded system development

摘要

Disclosed herein are representative embodiments of methods, systems, and apparatus that can used to control real-time events (e.g., the real-time clock) during the design, simulation, or verification of an embedded system. In one exemplary embodiment disclosed herein, for example, a real-time clock signal is generated and tasks defined by an embedded software application are triggered with the real-time clock signal. In this embodiment, the embedded software application is executed by an embedded processor with a real-time operating system (“RTOS”), and the real-time clock signal is controllable independent of a processor clock signal driving the embedded processor in a manner that allows the real-time clock to have a different time base than the processor clock.

主权项

1. A method, comprising:
generating a real-time clock signal; and triggering tasks defined by an embedded software application with the real-time clock signal, the tasks comprising sets of individual instructions, wherein the embedded software application is executed by an embedded processor with a real-time operating system (RTOS), wherein the real-time clock signal is controllable independent of a processor clock signal driving the embedded processor to individually execute individual instructions such that the real-time clock signal operates without interrupting the processor clock signal and has a different time base than the processor clock signal, wherein the processor clock signal is derived from a source that is separate and different from a source of the real-time clock signal; wherein the embedded processor is part of an embedded system, and wherein the source for the processor clock signal is a crystal oscillator located on the embedded system separate from the embedded processor.