JTAG PROGRAMMING UTILITY README FOR OPENRISC 1000
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JTAG PROGRAMMING UTILITY README FOR OPENRISC 1000
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NOTE:
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NOTE:
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This is a modified version of JTAG utility to work with
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This is a modified version of JTAG utility to work with
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Celoxica boards.
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Celoxica boards.
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INTRODUCTION
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INTRODUCTION
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JP1 is a proprietary JTAG protocol. It is very simple, and perhaps
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JP1 is a proprietary JTAG protocol. It is very simple, and perhaps
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its biggest advantage is that no special HW is needed -- only a
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its biggest advantage is that no special HW is needed -- only a
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parallel port cable and some buffers. It is compatible with Xilinx
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parallel port cable and some buffers. It is compatible with Xilinx
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Parallel Cable III.
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Parallel Cable III.
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Gdb is capable of connecting, controlling and debugging the board
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Gdb is capable of connecting, controlling and debugging the board
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via JP1. Currently jp1 has support only for Linux.
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via JP1. Currently jp1 has support only for Linux.
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USAGE
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USAGE
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jp1 [cable] [port]
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jp1 [cable] [port]
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The cable parameter selects the cable to use for communicateing with the board.
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The cable parameter selects the cable to use for communicateing with the board.
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At the time of writting, cable may be one of xpc3, xess, rtl_sim or vpi. xpc3
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At the time of writting, cable may be one of xpc3, xess, rtl_sim or vpi. xpc3
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assumes a xillinx parallel cable 3, rtl_sim connects to a rtl simulator,
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assumes a xillinx parallel cable 3, rtl_sim connects to a rtl simulator,
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communicateing with it via files (slow), vpi connects to a rtl simulator via the
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communicateing with it via files (slow), vpi connects to a rtl simulator via the
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vpi (faster). The port parameter specified designates TCP/IP port address where
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vpi (faster). The port parameter specified designates TCP/IP port address where
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the server starts. Run jp1 without arguments for a list of cable specific
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the server starts. Run jp1 without arguments for a list of cable specific
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options.
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options.
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First, start the jp1 program in root mode, e.g.:
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First, start the jp1 program in root mode, e.g.:
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./jp1 xpc3 9999
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./jp1 xpc3 9999
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Then start gdb and connect to it,
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Then start gdb and connect to it,
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using e.g.:
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using e.g.:
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$ or32-rtems-gdb test.or32
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$ or32-rtems-gdb test.or32
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(gdb) target jtag jtag://localhost:9999
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(gdb) target jtag jtag://localhost:9999
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Then load the program into the memory:
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Then load the program into the memory:
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(gdb) load
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(gdb) load
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and start it up:
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and start it up:
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(gdb) set $pc=0x100
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(gdb) set $pc=0x100
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You can write stepi or si, to see if things are working
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You can write stepi or si, to see if things are working
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correctly:
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correctly:
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(gdb) stepi
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(gdb) stepi
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If the program counter increases, we can set the breakpoint
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If the program counter increases, we can set the breakpoint
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and run the program with command 'continue' or 'c'.
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and run the program with command 'continue' or 'c'.
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AUTHORS
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AUTHORS
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Simons Srot, simons@opencores.org
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Simons Srot, simons@opencores.org
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Marko Mlinar, markom@opencores.org
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Marko Mlinar, markom@opencores.org
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