Using an open debug interconnect model to simplify embedded systems design
An open debug interconnect model is proposed for understanding debugger component interactions.
By Tom Cunningham, Freescale Semiconductor
(08/29/07, 12:05:00 AM EDT) -- Embedded.com
Technology people are generally familiar with the Open Systems Interconnection model for computer networks and protocols, often referred to as the OSI Reference Model (ISO 7498)[1]. The Basic Reference portion of the model consists of seven layers which build upon each other with increasing levels of abstraction (See Figure 1 below).
This article postulates that a similar abstraction may be applied to the embedded debugging world, with functional layers analogous to the OSI model. Further, individual layers can be assigned to particular debug entities, just like, for example, the association of the OSI network layer to routers, or the application layer association with a host.
Figure 1. OSI Layers and Example implementations
By Tom Cunningham, Freescale Semiconductor
(08/29/07, 12:05:00 AM EDT) -- Embedded.com
Technology people are generally familiar with the Open Systems Interconnection model for computer networks and protocols, often referred to as the OSI Reference Model (ISO 7498)[1]. The Basic Reference portion of the model consists of seven layers which build upon each other with increasing levels of abstraction (See Figure 1 below).
This article postulates that a similar abstraction may be applied to the embedded debugging world, with functional layers analogous to the OSI model. Further, individual layers can be assigned to particular debug entities, just like, for example, the association of the OSI network layer to routers, or the application layer association with a host.
Figure 1. OSI Layers and Example implementations
The intent here is to explore levels of debugging functionality, with the OSI model as a guide, and identify hierarchical layers and associations among hardware and software to produce a model of debugging interrelationships. It is hoped that such a model may provide clarity in understanding the myriad ways debugger components interact.
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