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CMSIS-DAP
Version 0.01 - Beta
Interface Firmware for CoreSight Debug Access Port
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This chapter introduces the specification of the Firmware for the CoreSight Debug Access Port (CMSIS-DAP).The ARM® Cortex processors provide the CoreSight debug and trace unit. CMSIS-DAP supports target Devices that contain one or more Cortex processors. A Device provides a Debug Access Port (DAP) either with a 5-pin JTAG or with a 2-pin Serial Wired Debug (SWD) interface that connects to a Debug Unit. CMSIS-DAP is the interface firmware for a Debug Unit that connects the Debug Port to USB. Debuggers that execute on a host computer connect via USB and the Debug Unit to the Device which runs the application software.
The CMSIS-DAP Software stack is composed of the following components:
The CMSIS-DAP Firmware is provided as source code and is fully configurable to a new Debug Unit. A source code template and several reference implementations for popular Debug Units are provided. Refer to Firmware Configuration for more information.
The RDDI-DAP Access DLL is provided as Windows DLL and connects the debugger to the CMSIS-DAP Firmware. It is provided as part of CMSIS-DAP in object form and can be freely distributed by debugger vendors as part of their CMSIS-DAP debugger interface. The RDDI-DAP Access DLL is also used to validate the CMSIS-DAP interface. CMSIS-DAP compliant Debug Units must be validated using this DLL. Refer to Validate Debug Unit for more information.
The RDDI-DAP interface specification will be available separately from ARM.
The CMSIS-DAP is provided free of charge by ARM and can be freely distributed as part of Cortex-M processor-based Debug Units that are stand-alone or integrated evaluation boards. used for all Cortex-M based devices. View the LICENCE AGREEMENT for CMSIS-DAP in detail.
Revision History of CMSIS-DAP.
| Version | Description |
|---|---|
| V0.01 | Beta Release. |