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[/] [neorv32/] [trunk/] [docs/] [datasheet/] [on_chip_debugger.adoc] - Diff between revs 68 and 71
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* a small ROM that contains the code for the "park loop", which is executed when the CPU is _in_ debug mode.
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* a small ROM that contains the code for the "park loop", which is executed when the CPU is _in_ debug mode.
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* a program buffer populated by the debugger host to execute small programs
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* a program buffer populated by the debugger host to execute small programs
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* a data buffer to transfer data between the processor and the debugger host
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* a data buffer to transfer data between the processor and the debugger host
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* a status register to communicate debugging requests
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* a status register to communicate debugging requests
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.DM Register Access
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[IMPORTANT]
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All memory-mapped registers of the DM can only be accessed by the CPU if it is actually _in_ debug mode.
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Hence, the DM registers are not "visible" for normal CPU operations.
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Any access outside of debug mode will raise a bus error exception.
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.Park Loop Code Sources
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.Park Loop Code Sources
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[NOTE]
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[NOTE]
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The assembly sources of the **park loop code** are available in `sw/ocd-firmware/park_loop.S`. Please note, that these
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The assembly sources of the **park loop code** are available in `sw/ocd-firmware/park_loop.S`. Please note, that these
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sources are not intended to be changed by the used. Hence, the makefile does not provide an automatic option
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sources are not intended to be changed by the used. Hence, the makefile does not provide an automatic option
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to compile and "install" the debugger ROM code into the HDL sources and require a manual copy
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to compile and "install" the debugger ROM code into the HDL sources and require a manual copy
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