Abstract:

Continuous operation with convenient diagnosis and maintainability is required in realtime online embedded system However,most embedded devices utilize watchdog as the global resetting solution,and the operation module and management module are coupling when resetting.Therefore it fails to meet the requirements of realtime online system for tough diagnosis and maintainability online.Aiming at these problems,based on the analysis of the circuit structures and the resetting requirements of the realtime online embedded devices,we propose a new reset solution,which supports multisource reset with the last words,and which can monitor reset reason,start quickly,and can achieve separation reset between equipment management and operation processes as well.Tests have shown continuous operation or minimum break could be achieved by the proposed resett solution with better reliability and maintainability.

Key words: multiple sources reset;last words;reset reason;fast start