Detection of Errors on Serial Communication Lines in RTOS Based-Embedded Systems

摘要

Embedded Real Time application uses multi threading, a key concept of any conventional OS. The advantage of multi-threading include greater throughput, more efficient use of CPU such that it cannot remain idle for long time, better system reliability, improved performance on multiprocessor computer. The use of Real Time Operating Systems (RTOSs) became an attractive solution to simplify the design of safety -critical real-time embedded systems. Due to their demanding strict attention to rules and procedures constraints such as high-speed, low voltage operation and battery-po wer dependence, because of sudden up and down of voltages, transients in flow of current can cause error in serial communication lines. External conditions, such as Electromagnetic Interference (EMI), Heavy-Ion Radiation (HIR) as well as Po wer Supply Disturbances (PSD) can also cause transient faults. As the major consequence, the system's reliability degrades. In this paper, the main focus will be on the detection of the errors on the serial communication lines. This is achieved by using a hardware approach with the combination of Cyclic Redundancy Check and RTOS. During execution of these programs, the proposed system exposed to EMI according to the international standard for voltage transients, voltage dips and short interruptions on the serial communicatio n lines of electronic systems. The obtained result shows that the proposed approach is able to provide higher fault coverage