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<!-- Copyright (C) 2003 Red Hat, Inc.                                -->
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<HTML
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><HEAD
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><TITLE
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>NEC CEB-V850/SA1 Hardware Setup</TITLE
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TITLE="Target Setup"
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TITLE="SH4/SE7751 Hardware Setup"
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><BODY
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BGCOLOR="#FFFFFF"
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><TR
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><TH
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COLSPAN="3"
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ALIGN="center"
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>eCos User Guide</TH
50 
></TR
51 
><TR
52 
><TD
53 
WIDTH="10%"
54 
ALIGN="left"
55 
VALIGN="bottom"
56 
><A
57 
HREF="setup-sh-se7751.html"
58 
ACCESSKEY="P"
59 
>Prev</A
60 
></TD
61 
><TD
62 
WIDTH="80%"
63 
ALIGN="center"
64 
VALIGN="bottom"
65 
>Appendix A. Target Setup</TD
66 
><TD
67 
WIDTH="10%"
68 
ALIGN="right"
69 
VALIGN="bottom"
70 
><A
71 
HREF="setup-v850-cebsb1.html"
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ACCESSKEY="N"
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>Next</A
74 
></TD
75 
></TR
76 
></TABLE
77 
><HR
78 
ALIGN="LEFT"
79 
WIDTH="100%"></DIV
80 
><DIV
81 
CLASS="SECT1"
82 
><H1
83 
CLASS="SECT1"
84 
><A
85 
NAME="SETUP-V850-CEBSA1">NEC CEB-V850/SA1 Hardware Setup</H1
86 
><P
87 
>The CEB-V850 board is fitted with a socketed EPROM. The internal
88 
Flash of the V850 supplied with the CEB-V850 boards defaults to
89 
vectoring into this EPROM. A  GDB stub image should be programmed
90 
into an EPROM fitted to this board, and a pre-built image is provided
91 
at <TT
92 
CLASS="FILENAME"
93 
>loaders/v850-ceb_v850/v850sa1/gdb_module.bin </TT
94 
>under
95 
the root of your eCos installation.</P
96 
><P
97 
>The EPROM is installed to the socket labelled U7 on the board.
98 
Attention should be paid to the correct orientation of the EPROM
99 
during installation. </P
100 
><P
101 
>When programming an EPROM using the binary image, be careful
102 
to get the byte order correct. It needs to be little-endian. If
103 
the EPROM burner software has a hex-editor, check that the first
104 
few bytes of the image look similar to: </P
105 
><TABLE
106 
BORDER="5"
107 
BGCOLOR="#E0E0F0"
108 
WIDTH="70%"
109 
><TR
110 
><TD
111 
><PRE
112 
CLASS="PROGRAMLISTING"
113 
>00000000: 0018 8007 5e02 0000 0000 0000 0000 0000</PRE
114 
></TD
115 
></TR
116 
></TABLE
117 
><P
118 
>If the byte order is wrong you will see 1800 instead of 0018
119 
etc. Use the EPROM burner software to make a byte-swap before you
120 
burn to image to the EPROM. </P
121 
><P
122 
>If the GDB stub EPROM you burn does not work, try reversing
123 
the byte-order, even if you think you have it the right way around.
124 
At least one DOS-based EPROM burner program is known to have the
125 
byte-order upside down.</P
126 
><P
127 
>The GDB stub in the EPROM allows communication with GDB using
128 
the serial port. The communication parameters are fixed at 38400
129 
baud, 8 data bits, no parity bit and 1 stop bit (8-N-1). No flow
130 
control is employed. Connection to the host computer should be made
131 
using a dedicated serial cable as specified in the CEB-V850/SA1
132 
manual.</P
133 
><DIV
134 
CLASS="SECT2"
135 
><H2
136 
CLASS="SECT2"
137 
><A
138 
NAME="AEN4279">Installing the Stubs into ROM</H2
139 
><DIV
140 
CLASS="SECT3"
141 
><H3
142 
CLASS="SECT3"
143 
><A
144 
NAME="AEN4281">Preparing the Binaries</H3
145 
><P
146 
>These two binary preparation steps are not strictly necessary
147 
as the eCos distribution ships with pre-compiled binaries in the
148 
directory loaders/v850-ceb_v850 relative to the
149 
installation root.</P
150 
><DIV
151 
CLASS="SECT4"
152 
><H4
153 
CLASS="SECT4"
154 
><A
155 
NAME="AEN4284">Building the ROM images with the eCos Configuration Tool</H4
156 
><P
157 
></P
158 
><OL
159 
TYPE="1"
160 
><LI
161 
><P
162 
>Start with a new document - selecting the
163 
<SPAN
164 
CLASS="emphasis"
165 
><I
166 
CLASS="EMPHASIS"
167 
>File-&#62;New</I
168 
></SPAN
169 
>
170 
 menu item if necessary to do this.</P
171 
></LI
172 
><LI
173 
><P
174 
>Choose the
175 
<SPAN
176 
CLASS="emphasis"
177 
><I
178 
CLASS="EMPHASIS"
179 
>Build-&#62;Templates</I
180 
></SPAN
181 
>
182 
 menu item, and then select the NEC CEB-V850/SA1 hardware.</P
183 
></LI
184 
><LI
185 
><P
186 
>While still displaying the
187 
<SPAN
188 
CLASS="emphasis"
189 
><I
190 
CLASS="EMPHASIS"
191 
>Build-&#62;Templates</I
192 
></SPAN
193 
>
194 
 dialog box, select the &#8220;stubs&#8221; package template
195 
to build a GDB stub. Click
196 
<SPAN
197 
CLASS="emphasis"
198 
><I
199 
CLASS="EMPHASIS"
200 
>OK</I
201 
></SPAN
202 
>.</P
203 
></LI
204 
><LI
205 
><P
206 
>Build eCos using
207 
<SPAN
208 
CLASS="emphasis"
209 
><I
210 
CLASS="EMPHASIS"
211 
>Build-&#62;Library</I
212 
></SPAN
213 
>. </P
214 
></LI
215 
><LI
216 
><P
217 
>When the build completes, the image files can be found
218 
in the bin/ subdirectory of the install tree. GDB stub
219 
ROM images have the  prefix &#8220;gdb_module&#8221;.</P
220 
></LI
221 
></OL
222 
></DIV
223 
><DIV
224 
CLASS="SECT4"
225 
><H4
226 
CLASS="SECT4"
227 
><A
228 
NAME="AEN4302">Building the ROM images with ecosconfig</H4
229 
><P
230 
></P
231 
><OL
232 
TYPE="1"
233 
><LI
234 
><P
235 
>Make an empty directory to contain the build tree,
236 
and cd into it. </P
237 
></LI
238 
><LI
239 
><P
240 
>To build a GDB stub ROM image, enter the command:
241 
 
242 
<TABLE
243 
BORDER="5"
244 
BGCOLOR="#E0E0F0"
245 
WIDTH="70%"
246 
><TR
247 
><TD
248 
><PRE
249 
CLASS="PROGRAMLISTING"
250 
>$ ecosconfig new ceb-v850 stubs </PRE
251 
></TD
252 
></TR
253 
></TABLE
254 
></P
255 
></LI
256 
><LI
257 
><P
258 
>Enter the commands:
259 
 
260 
<TABLE
261 
BORDER="5"
262 
BGCOLOR="#E0E0F0"
263 
WIDTH="70%"
264 
><TR
265 
><TD
266 
><PRE
267 
CLASS="PROGRAMLISTING"
268 
>$ ecosconfig tree
269 
$ make</PRE
270 
></TD
271 
></TR
272 
></TABLE
273 
>
274 
 </P
275 
></LI
276 
><LI
277 
><P
278 
>When the build completes, the image files can be found
279 
in the bin/ subdirectory of the install tree. GDB stub
280 
ROM images have the prefix &#8220;gdb_module&#8221;.</P
281 
></LI
282 
></OL
283 
></DIV
284 
></DIV
285 
><DIV
286 
CLASS="SECT3"
287 
><H3
288 
CLASS="SECT3"
289 
><A
290 
NAME="AEN4315">Installing the Stubs into ROM or FLASH</H3
291 
><P
292 
></P
293 
><OL
294 
TYPE="1"
295 
><LI
296 
><P
297 
> Program the binary image file gdb_module.bin
298 
into ROM or FLASH referring to the instructions of your ROM
299 
                  programmer. </P
300 
></LI
301 
><LI
302 
><P
303 
> Plug the ROM/FLASH into the socket as described
304 
at the beginning of this section.</P
305 
></LI
306 
></OL
307 
></DIV
308 
></DIV
309 
><DIV
310 
CLASS="SECT2"
311 
><H2
312 
CLASS="SECT2"
313 
><A
314 
NAME="AEN4322">Debugging with the NEC V850 I.C.E.</H2
315 
><P
316 
>eCos applications may be debugged using the NEC V850 In Circuit
317 
Emulator (I.C.E.) A PC running Microsoft Windows is required in
318 
order to run the NEC ICE software and drivers. In addition Red Hat
319 
have developed a &#8220;libremote&#8221; server application
320 
named v850ice.exe which is used on the PC connected to the I.C.E.
321 
in order to allow connections from GDB.</P
322 
><P
323 
>The I.C.E. must be physically connected to a Windows NT system
324 
through NEC&quot;s PCI or PC Card interface.  A driver, DLLs,
325 
and application are provided by NEC to control the I.C.E.</P
326 
><P
327 
>v850ice is a Cygwin based server that runs on the NT system
328 
and provides an interface between the gdb client and the I.C.E.
329 
software. v850-elf-gdb may be run on the Windows NT system or on
330 
a remote system. v850-elf-gdb communicates with the libremote server
331 
using the gdb remote protocol over a TCP/IP socket.  v850ice
332 
communicates with the I.C.E. by calling functions in the NECMSG.DLL provided
333 
by NEC.</P
334 
><DIV
335 
CLASS="SECT3"
336 
><H3
337 
CLASS="SECT3"
338 
><A
339 
NAME="AEN4327">INITIAL SETUP</H3
340 
><P
341 
></P
342 
><OL
343 
TYPE="1"
344 
><LI
345 
><P
346 
>Configure the hardware including the I.C.E., SA1 or
347 
SB1 Option Module, and target board.  Install the interface card
348 
in the Windows NT system. Reference NEC&quot;s documentation
349 
for interface installation, jumper settings, etc.</P
350 
></LI
351 
><LI
352 
><P
353 
>Install the Windows NT device driver provided by NEC.</P
354 
></LI
355 
><LI
356 
><P
357 
>Copy the NEC DLLs, MDI application, and other support
358 
files to a directory on the Windows NT system. The standard location
359 
is C:\NecTools32. This directory will be referred to as
360 
the "libremote server directory" in this document. v850ice.exe must
361 
also be copied to this directory after being built. The required
362 
files are:  cpu.cfg, Nec.cfg, MDI.EXE, NECMSG.DLL, EX85032.DLL,
363 
V850E.DLL, IE850.MON, IE850E.MON, and D3037A.800.</P
364 
></LI
365 
><LI
366 
><P
367 
>Make certain the file cpu.cfg contains the line:</P
368 
><TABLE
369 
BORDER="5"
370 
BGCOLOR="#E0E0F0"
371 
WIDTH="70%"
372 
><TR
373 
><TD
374 
><PRE
375 
CLASS="PROGRAMLISTING"
376 
>CpuOption=SA1</PRE
377 
></TD
378 
></TR
379 
></TABLE
380 
><P
381 
>if using a V850/SA1 module, or:</P
382 
><TABLE
383 
BORDER="5"
384 
BGCOLOR="#E0E0F0"
385 
WIDTH="70%"
386 
><TR
387 
><TD
388 
><PRE
389 
CLASS="PROGRAMLISTING"
390 
>CpuOption=SB1</PRE
391 
></TD
392 
></TR
393 
></TABLE
394 
><P
395 
>if using a V850/SB1 module.</P
396 
></LI
397 
><LI
398 
><P
399 
>Set the environment variable IEPATH to point to the libremote
400 
server</P
401 
><P
402 
>directory.</P
403 
></LI
404 
></OL
405 
></DIV
406 
><DIV
407 
CLASS="SECT3"
408 
><H3
409 
CLASS="SECT3"
410 
><A
411 
NAME="AEN4345">BUILD PROCEDURES</H3
412 
><P
413 
>A pre-built v850ice.exe executable is supplied in the loaders/v850-ceb_v850 directory
414 
relative to the root of the eCos installation. However the following process
415 
will allow the rebuilding of this executable if required:</P
416 
><P
417 
>For this example assume the v850ice libremote tree has been
418 
copied to a directory named "server".  The directory structure will
419 
be similar to the following diagram:</P
420 
><P
421 
><TABLE
422 
BORDER="5"
423 
BGCOLOR="#E0E0F0"
424 
WIDTH="70%"
425 
><TR
426 
><TD
427 
><PRE
428 
CLASS="PROGRAMLISTING"
429 
>                server
430 
                   |
431 
                 devo
432 
                 /  \
433 
           config    libremote
434 
                      /     \
435 
                   lib       v850ice</PRE
436 
></TD
437 
></TR
438 
></TABLE
439 
></P
440 
><P
441 
>Build the v850ice source as follows.  Be sure to use the native
442 
Cygwin compiler tools that were supplied alongside eCos.</P
443 
><P
444 
>cd server
445 
mkdir build
446 
cd build
447 
../devo/configure --target=v850-elf --host=i686-pc-cygwin
448 
make</P
449 
><P
450 
>The resultant libremote server image (v850ice.exe) can be
451 
found in build/libremote/v850ice.  Copy v850ice.exe
452 
to the lib remote server directory.</P
453 
></DIV
454 
><DIV
455 
CLASS="SECT3"
456 
><H3
457 
CLASS="SECT3"
458 
><A
459 
NAME="AEN4354">V850ICE.EXE EXECUTION</H3
460 
><P
461 
>The v850ice command line syntax is:</P
462 
><P
463 
>v850ice [-d] [-t addr] [port number]</P
464 
><P
465 
>The optional -d option enables debug output.  The -t option
466 
is associated with thread debugging - see the "eCos thread debugging"
467 
section below for details. By default v850ice listens on port 2345
468 
for an attach request from a gdb client.  A different port number
469 
may be specified on the command line.</P
470 
><P
471 
>To run the libremote server:</P
472 
><P
473 
></P
474 
><OL
475 
TYPE="1"
476 
><LI
477 
><P
478 
>Power on the I.C.E. and target board.</P
479 
></LI
480 
><LI
481 
><P
482 
>Open a Cygwin window.</P
483 
></LI
484 
><LI
485 
><P
486 
>Run v850ice.</P
487 
></LI
488 
><LI
489 
><P
490 
>You will see the MDI interface window appear.  In this
491 
window you should see the "Connected to In-Circuit Emulator" message.
492 
 In the Cygwin window, the libremote server will indicate it is
493 
ready to accept a gdb client connection with the message "v850ice:
494 
 listening on port 2345."</P
495 
></LI
496 
></OL
497 
></DIV
498 
><DIV
499 
CLASS="SECT3"
500 
><H3
501 
CLASS="SECT3"
502 
><A
503 
NAME="AEN4369">V850-ELF-GDB EXECUTION</H3
504 
><P
505 
>Run the v850-elf-gdb client to debug the V850 target.  It
506 
is necessary to issue certain configuration commands to the I.C.E.
507 
software.  These commands may be issued directly in the MDI window
508 
or they may be issued from the gdb client through the "monitor"
509 
command.</P
510 
><P
511 
>On the Cosmo CEB-V850 board, on-chip Flash is mapped at address
512 
0x0, the on-board EPROM at 0x100000 and the on-board RAM at 0xfc0000.
513 
Since a stand alone V850 will start executing from address 0x0 on
514 
reset, it is normal to load either an application or a bootstrap
515 
loader for Flash at this address. eCos programs may be built to
516 
boot from Flash or the on-board EPROM. If building for the on-board
517 
EPROM, it would be expected that the Flash will contain the default
518 
CEB-V850 flash contents. An ELF format version of the default contents
519 
may be found in the eCos distribution with the name v850flash.img.</P
520 
><P
521 
>In stand alone operation, normally the code in this flash image
522 
would have been programmed into the V850 on the Cosmo board, and
523 
this would cause it to vector into the on-board EPROM to run the
524 
application located there. In the case of eCos, this application
525 
may be a GDB stub ROM application, allowing the further download
526 
to RAM over serial of actual applications to debug.</P
527 
><P
528 
>As an example, we shall demonstrate how to use the I.C.E.
529 
to download the v850flash.img and GDB stub EPROM image using I.C.E.
530 
emulator memory only, and not requiring any actual programming of
531 
devices.</P
532 
><P
533 
>v850-elf-gdb -nw
534 
(gdb) file v850flash.img
535 
(gdb) target remote localhost:2345
536 
(gdb) monitor reset
537 
(gdb) monitor cpu r=256 a=16
538 
(gdb) monitor map r=0x100000-L 0x80000
539 
(gdb) monitor map u=0xfc0000-L 0x40000
540 
(gdb) monitor pinmask k
541 
(gdb) monitor step
542 
(gdb) monitor step
543 
(gdb) monitor step
544 
(gdb) monitor step
545 
(gdb) load
546 
(gdb) detach
547 
(gdb) file gdb_module.img
548 
(gdb) target remote localhost:2345
549 
(gdb) load
550 
(gdb) continue</P
551 
><P
552 
>NOTE: The four "monitor step" commands are only required the
553 
first time the board is connected to the I.C.E., otherwise the program
554 
will fail.</P
555 
><P
556 
>This is because of a limitation of the I.C.E. hardware that
557 
means that the first time it is used, the "map" commands are not
558 
acted on and the addresses "0x100000" and "0xfc0000" are not mapped.
559 
This can be observed using the command "td e-20" in the MDI application&quot;s
560 
console to display the trace buffer, which will show that the contents
561 
of address 0x100000 are not valid. Subsequent runs do not require
562 
the "monitor step" commands.</P
563 
><P
564 
>It is unusual to load two executable images to a target through
565 
gdb.  From the example above notice that this is accomplished by
566 
attaching to the libremote server, loading the flash image, detaching,
567 
reattaching, and loading the ROM/RAM image. It is more
568 
normal to build an executable image that can be executed directly.
569 
In eCos this is achieved by selecting either the ROM or ROMRAM startup
570 
type, and optionally enable building for the internal FLASH. The
571 
I.C.E. emulator memory can emulate both the internal FLASH and the
572 
EPROM, so real hardware programming is not required.</P
573 
><P
574 
>Upon running this example you will notice that the libremote
575 
server does not exit upon detecting a detach request, but simply
576 
begins listening for the next attach request.  To cause v850ice
577 
to terminate, issue the "monitor quit" or "monitor exit" command
578 
from the gdb client.  v850ice will then terminate with the next
579 
detach request.  (You can also enter control-c in the Cygwin/DOS
580 
window where v850ice is running.)</P
581 
></DIV
582 
><DIV
583 
CLASS="SECT3"
584 
><H3
585 
CLASS="SECT3"
586 
><A
587 
NAME="AEN4380">MDI INTERFACE VS. GDB INTERFACE</H3
588 
><P
589 
>If a filename is referenced in an MDI command, whether the
590 
command is entered in the MDI window or issued from the gdb client
591 
with the monitor command, the file must reside on the Windows NT
592 
libremote server system.  When specifying a filename when entering
593 
a command in the MDI window it is obvious that a server local file
594 
is being referenced.  When issuing an MDI command from the gdb client, the
595 
user must remember that the command line is simply passed to the
596 
I.C.E. software on the server system.  The command is executed by
597 
the I.C.E. software as though it were entered locally.</P
598 
><P
599 
>Executable images may be loaded into the V850 target by entering
600 
the "load" command in the MDI window or with the gdb "load" command.
601 
 If the MDI load command is used, the executable image must be located
602 
on the server system and must be in S Record format.  If the gdb
603 
load command is used, the executable image must be located on the
604 
client system and must be in ELF format.</P
605 
><P
606 
>Be aware that the gdb client is not aware of debugger commands
607 
issued from the MDI window.  It is possible to cause the gdb client
608 
and the I.C.E. software to get out of sync by issuing commands from
609 
both interfaces during the same debugging session.</P
610 
></DIV
611 
><DIV
612 
CLASS="SECT3"
613 
><H3
614 
CLASS="SECT3"
615 
><A
616 
NAME="AEN4385">eCos THREAD DEBUGGING</H3
617 
><P
618 
>eCos and the V850 I.C.E. libremote server have been written
619 
to work together to allow debugging of eCos threads. This is an
620 
optional feature, disabled by default because of the overheads trying
621 
to detect a threaded program involves.</P
622 
><P
623 
>Obviously thread debugging is not possible for programs with
624 
"RAM" startup type, as they are expected to operate underneath a
625 
separate ROM monitor (such as a GDB stub ROM), that itself would
626 
provide its own thread debugging capabilities over the serial line.
627 
Thread debugging is relevant only for programs built for Flash, ROM,
628 
or ROMRAM startup.</P
629 
><P
630 
>To configure the libremote server to support thread debugging,
631 
use the command:</P
632 
><P
633 
><TABLE
634 
BORDER="5"
635 
BGCOLOR="#E0E0F0"
636 
WIDTH="70%"
637 
><TR
638 
><TD
639 
><PRE
640 
CLASS="PROGRAMLISTING"
641 
>(gdb) monitor syscallinfo ADDRESS</PRE
642 
></TD
643 
></TR
644 
></TABLE
645 
></P
646 
><P
647 
>at the GDB console prompt, where ADDRESS is the address of
648 
the syscall information structure included in the applications.
649 
In eCos this has been designed to be located at a consistent address
650 
for each CPU model (V850/SA1 or V850/SB1). It
651 
may be determined from an eCos executable using the following command
652 
at a cygwin bash prompt:</P
653 
><P
654 
><TABLE
655 
BORDER="5"
656 
BGCOLOR="#E0E0F0"
657 
WIDTH="70%"
658 
><TR
659 
><TD
660 
><PRE
661 
CLASS="PROGRAMLISTING"
662 
>v850-elf-nm EXECUTABLE | grep hal_v85x_ice_syscall_info</PRE
663 
></TD
664 
></TR
665 
></TABLE
666 
></P
667 
><P
668 
>At the current time, this address is 0xfc0400 for a Cosmo
669 
board fitted with a V850/SA1, or 0xfc0540 for a Cosmo board
670 
fitted with a V850/SB1.</P
671 
><P
672 
>So for example, the GDB command for the SB1 would be:</P
673 
><P
674 
><TABLE
675 
BORDER="5"
676 
BGCOLOR="#E0E0F0"
677 
WIDTH="70%"
678 
><TR
679 
><TD
680 
><PRE
681 
CLASS="PROGRAMLISTING"
682 
>(gdb) monitor syscallinfo 0xfc0540</PRE
683 
></TD
684 
></TR
685 
></TABLE
686 
></P
687 
><P
688 
>Given that the syscallinfo address is fixed over all eCos
689 
executables for a given target, it is possible to define it on the
690 
libremote command line as well using the "-t" option, for example:</P
691 
><P
692 
><TABLE
693 
BORDER="5"
694 
BGCOLOR="#E0E0F0"
695 
WIDTH="70%"
696 
><TR
697 
><TD
698 
><PRE
699 
CLASS="PROGRAMLISTING"
700 
>bash$ v850ice -t 0xfc0400
701 
v850ice: listening on port 2345</PRE
702 
></TD
703 
></TR
704 
></TABLE
705 
></P
706 
></DIV
707 
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708 
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724 
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726 
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727 
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736 
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