Abstract In developing proce dures,in troducing Device Abstractla yer( DAL) makes sp ecification of system development cntrollable.The developing process of embedded system with DAL is introduced. The designing procedures and criteria of DAL in embedded system are described in detail, the practicalin terfacebeen used in network products is given.In volvement of DAL is the applicable presupposition of software process management in d eveloping embedded system. Reasonable design of DAL is critical element in successful development of embedded system.Keywords DAL( DeviceA bstractL ayer) Embeddeds ystem Softwares tructure Developingp roces
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