OpenCores
URL https://opencores.org/ocsvn/openrisc_2011-10-31/openrisc_2011-10-31/trunk

Subversion Repositories openrisc_2011-10-31

[/] [openrisc/] [trunk/] [rtos/] [ecos-2.0/] [doc/] [html/] [ref/] [io-tty-driver.html] - Blame information for rev 575

Go to most recent revision | Details | Compare with Previous | View Log

Line No. Rev Author Line
1 28 unneback 
<!-- Copyright (C) 2003 Red Hat, Inc.                                -->
2 
<!-- This material may be distributed only subject to the terms      -->
3 
<!-- and conditions set forth in the Open Publication License, v1.0  -->
4 
<!-- or later (the latest version is presently available at          -->
5 
<!-- http://www.opencontent.org/openpub/).                           -->
6 
<!-- Distribution of the work or derivative of the work in any       -->
7 
<!-- standard (paper) book form is prohibited unless prior           -->
8 
<!-- permission is obtained from the copyright holder.               -->
9 
<HTML
10 
><HEAD
11 
><TITLE
12 
> TTY driver</TITLE
13 
><meta name="MSSmartTagsPreventParsing" content="TRUE">
14 
<META
15 
NAME="GENERATOR"
16 
CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+
17 
"><LINK
18 
REL="HOME"
19 
TITLE="eCos Reference Manual"
20 
HREF="ecos-ref.html"><LINK
21 
REL="UP"
22 
TITLE="Serial driver details"
23 
HREF="io-serial-driver-details.html"><LINK
24 
REL="PREVIOUS"
25 
TITLE="Serial driver details"
26 
HREF="io-serial-driver-details.html"><LINK
27 
REL="NEXT"
28 
TITLE="How to Write a Driver"
29 
HREF="io-how-to-write-a-driver.html"></HEAD
30 
><BODY
31 
CLASS="SECTION"
32 
BGCOLOR="#FFFFFF"
33 
TEXT="#000000"
34 
LINK="#0000FF"
35 
VLINK="#840084"
36 
ALINK="#0000FF"
37 
><DIV
38 
CLASS="NAVHEADER"
39 
><TABLE
40 
SUMMARY="Header navigation table"
41 
WIDTH="100%"
42 
BORDER="0"
43 
CELLPADDING="0"
44 
CELLSPACING="0"
45 
><TR
46 
><TH
47 
COLSPAN="3"
48 
ALIGN="center"
49 
>eCos Reference Manual</TH
50 
></TR
51 
><TR
52 
><TD
53 
WIDTH="10%"
54 
ALIGN="left"
55 
VALIGN="bottom"
56 
><A
57 
HREF="io-serial-driver-details.html"
58 
ACCESSKEY="P"
59 
>Prev</A
60 
></TD
61 
><TD
62 
WIDTH="80%"
63 
ALIGN="center"
64 
VALIGN="bottom"
65 
>Chapter 16. Serial driver details</TD
66 
><TD
67 
WIDTH="10%"
68 
ALIGN="right"
69 
VALIGN="bottom"
70 
><A
71 
HREF="io-how-to-write-a-driver.html"
72 
ACCESSKEY="N"
73 
>Next</A
74 
></TD
75 
></TR
76 
></TABLE
77 
><HR
78 
ALIGN="LEFT"
79 
WIDTH="100%"></DIV
80 
><DIV
81 
CLASS="SECTION"
82 
><H1
83 
CLASS="SECTION"
84 
><A
85 
NAME="IO-TTY-DRIVER">TTY driver</H1
86 
><P
87 
>Use the include file <TT
88 
CLASS="FILENAME"
89 
>&lt;cyg/io/ttyio.h&gt;</TT
90 
> for
91 
this driver.</P
92 
><P
93 
>This driver is built on top of the simple
94 
serial driver and is typically used for a device that interfaces with
95 
humans such as a terminal. It provides some minimal formatting of data
96 
on output and allows for line-oriented editing on input.</P
97 
><DIV
98 
CLASS="SECTION"
99 
><H2
100 
CLASS="SECTION"
101 
><A
102 
NAME="AEN10715">Runtime configuration</H2
103 
><P
104 
>Runtime configuration is achieved by exchanging data structures with
105 
the driver via the <TT
106 
CLASS="FUNCTION"
107 
>cyg_io_set_config()</TT
108 
> and
109 
<TT
110 
CLASS="FUNCTION"
111 
>cyg_io_get_config()</TT
112 
> functions.</P
113 
><TABLE
114 
BORDER="5"
115 
BGCOLOR="#E0E0F0"
116 
WIDTH="70%"
117 
><TR
118 
><TD
119 
><PRE
120 
CLASS="PROGRAMLISTING"
121 
>typedef struct {
122 
 cyg_uint32 tty_out_flags;
123 
 cyg_uint32 tty_in_flags;
124 
} cyg_tty_info_t;</PRE
125 
></TD
126 
></TR
127 
></TABLE
128 
><P
129 
>The field <TT
130 
CLASS="STRUCTFIELD"
131 
><I
132 
>tty_out_flags</I
133 
></TT
134 
>
135 
is used to control what happens to data as it is send to the serial
136 
port. It contains a bitmap comprised of the bits as defined by the
137 
<TT
138 
CLASS="LITERAL"
139 
>CYG_TTY_OUT_FLAGS_xxx</TT
140 
> values below. </P
141 
><TABLE
142 
BORDER="5"
143 
BGCOLOR="#E0E0F0"
144 
WIDTH="70%"
145 
><TR
146 
><TD
147 
><PRE
148 
CLASS="PROGRAMLISTING"
149 
>#define CYG_TTY_OUT_FLAGS_CRLF 0x0001 // Map '\n' =&gt; '\n\r' on output</PRE
150 
></TD
151 
></TR
152 
></TABLE
153 
><P
154 
>If this bit is set in <TT
155 
CLASS="STRUCTFIELD"
156 
><I
157 
>tty_out_flags</I
158 
></TT
159 
>,
160 
any occurrence of the character &quot;\n&quot; will
161 
be replaced by the sequence &quot;\n\r&quot; before
162 
being sent to the device.</P
163 
><P
164 
>The field <TT
165 
CLASS="STRUCTFIELD"
166 
><I
167 
>tty_in_flags</I
168 
></TT
169 
>
170 
is used to control how data is handled as it comes from the serial
171 
port. It contains a bitmap comprised of the bits as defined by the
172 
<TT
173 
CLASS="LITERAL"
174 
>CYG_TTY_IN_FLAGS_xxx</TT
175 
> values below. </P
176 
><TABLE
177 
BORDER="5"
178 
BGCOLOR="#E0E0F0"
179 
WIDTH="70%"
180 
><TR
181 
><TD
182 
><PRE
183 
CLASS="PROGRAMLISTING"
184 
>#define CYG_TTY_IN_FLAGS_CR 0x0001 // Map '\r' =&gt; '\n' on input</PRE
185 
></TD
186 
></TR
187 
></TABLE
188 
><P
189 
>If this bit is set in <TT
190 
CLASS="STRUCTFIELD"
191 
><I
192 
>tty_in_flags</I
193 
></TT
194 
>, the
195 
character &quot;\r&quot; (&#8220;return&#8221; or &#8220;enter&#8221; on
196 
most keyboards) will be mapped to &quot;\n&quot;.</P
197 
><TABLE
198 
BORDER="5"
199 
BGCOLOR="#E0E0F0"
200 
WIDTH="70%"
201 
><TR
202 
><TD
203 
><PRE
204 
CLASS="PROGRAMLISTING"
205 
>#define CYG_TTY_IN_FLAGS_CRLF 0x0002 // Map '\n\r' =&gt; '\n' on input</PRE
206 
></TD
207 
></TR
208 
></TABLE
209 
><P
210 
>If this bit is set in <TT
211 
CLASS="STRUCTFIELD"
212 
><I
213 
>tty_in_flags</I
214 
></TT
215 
>, the
216 
character sequence &quot;\n\r&quot; (often sent by DOS/Windows
217 
based terminals) will be mapped to &quot;\n&quot;. </P
218 
><TABLE
219 
BORDER="5"
220 
BGCOLOR="#E0E0F0"
221 
WIDTH="70%"
222 
><TR
223 
><TD
224 
><PRE
225 
CLASS="PROGRAMLISTING"
226 
>#define CYG_TTY_IN_FLAGS_BINARY 0x0004 // No input processing</PRE
227 
></TD
228 
></TR
229 
></TABLE
230 
><P
231 
>If this bit is set in <TT
232 
CLASS="STRUCTFIELD"
233 
><I
234 
>tty_in_flags</I
235 
></TT
236 
>, the
237 
input will not be manipulated in any way before being placed in
238 
the user&#8217;s buffer. </P
239 
><TABLE
240 
BORDER="5"
241 
BGCOLOR="#E0E0F0"
242 
WIDTH="70%"
243 
><TR
244 
><TD
245 
><PRE
246 
CLASS="PROGRAMLISTING"
247 
>#define CYG_TTY_IN_FLAGS_ECHO 0x0008 // Echo characters as processed</PRE
248 
></TD
249 
></TR
250 
></TABLE
251 
><P
252 
>If this bit is set in <TT
253 
CLASS="STRUCTFIELD"
254 
><I
255 
>tty_in_flags</I
256 
></TT
257 
>, characters
258 
will be echoed back to the serial port as they are processed. </P
259 
></DIV
260 
><DIV
261 
CLASS="SECTION"
262 
><H2
263 
CLASS="SECTION"
264 
><A
265 
NAME="AEN10742">API details</H2
266 
><TABLE
267 
BORDER="5"
268 
BGCOLOR="#E0E0F0"
269 
WIDTH="70%"
270 
><TR
271 
><TD
272 
><PRE
273 
CLASS="PROGRAMLISTING"
274 
>cyg_io_read(handle, buf, len)</PRE
275 
></TD
276 
></TR
277 
></TABLE
278 
><P
279 
>This function is used to read data from the device. In the
280 
default case, data is read until an end-of-line character ("\n"
281 
or "\r") is read. Additionally, the characters are echoed
282 
back to the [terminal] device. Minimal editing
283 
of the input is also supported. </P
284 
><DIV
285 
CLASS="NOTE"
286 
><BLOCKQUOTE
287 
CLASS="NOTE"
288 
><P
289 
><B
290 
>Note: </B
291 
>When connecting to a remote target via GDB it is not possible
292 
to provide console input while GDB is connected. The GDB remote
293 
protocol does not support input. Users must disconnect from GDB
294 
if this functionality is required.</P
295 
></BLOCKQUOTE
296 
></DIV
297 
><TABLE
298 
BORDER="5"
299 
BGCOLOR="#E0E0F0"
300 
WIDTH="70%"
301 
><TR
302 
><TD
303 
><PRE
304 
CLASS="PROGRAMLISTING"
305 
>
306 
cyg_io_write(handle, buf, len)</PRE
307 
></TD
308 
></TR
309 
></TABLE
310 
><P
311 
>This function is used to send data to the device. In the default
312 
case, the end-of-line character "\n" is replaced by the
313 
sequence "\n\r". </P
314 
><TABLE
315 
BORDER="5"
316 
BGCOLOR="#E0E0F0"
317 
WIDTH="70%"
318 
><TR
319 
><TD
320 
><PRE
321 
CLASS="PROGRAMLISTING"
322 
>cyg_io_get_config(handle, key, buf, len)</PRE
323 
></TD
324 
></TR
325 
></TABLE
326 
><P
327 
>This function is used to get information about the channel&#8217;s
328 
configuration at runtime. </P
329 
><P
330 
></P
331 
><DIV
332 
CLASS="VARIABLELIST"
333 
><DL
334 
><DT
335 
><TT
336 
CLASS="LITERAL"
337 
>CYG_IO_GET_CONFIG_TTY_INFO</TT
338 
></DT
339 
><DD
340 
><P
341 
></P
342 
><DIV
343 
CLASS="VARIABLELIST"
344 
><DL
345 
><DT
346 
>Buf type:</DT
347 
><DD
348 
><P
349 
>cyg_tty_info_t</P
350 
></DD
351 
><DT
352 
>Function:</DT
353 
><DD
354 
><P
355 
>This function retrieves the current state of the
356 
            driver.
357 
            </P
358 
></DD
359 
></DL
360 
></DIV
361 
></DD
362 
></DL
363 
></DIV
364 
><P
365 
>Serial driver keys (see above) may also be specified
366 
in which case the call is passed directly to the serial
367 
driver. </P
368 
><TABLE
369 
BORDER="5"
370 
BGCOLOR="#E0E0F0"
371 
WIDTH="70%"
372 
><TR
373 
><TD
374 
><PRE
375 
CLASS="PROGRAMLISTING"
376 
>cyg_io_set_config(handle, key, buf, len)</PRE
377 
></TD
378 
></TR
379 
></TABLE
380 
><P
381 
>This function is used to modify the channel&#8217;s configuration
382 
at runtime. </P
383 
><P
384 
></P
385 
><DIV
386 
CLASS="VARIABLELIST"
387 
><DL
388 
><DT
389 
><TT
390 
CLASS="LITERAL"
391 
>CYG_IO_SET_CONFIG_TTY_INFO</TT
392 
></DT
393 
><DD
394 
><P
395 
></P
396 
><DIV
397 
CLASS="VARIABLELIST"
398 
><DL
399 
><DT
400 
>Buf type:</DT
401 
><DD
402 
><P
403 
>cyg_tty_info_t</P
404 
></DD
405 
><DT
406 
>Function:</DT
407 
><DD
408 
><P
409 
>This function changes the current state of the
410 
            driver.</P
411 
></DD
412 
></DL
413 
></DIV
414 
></DD
415 
></DL
416 
></DIV
417 
><P
418 
>Serial driver
419 
keys (see above) may also be specified in which case the
420 
call is passed directly to the serial driver. </P
421 
></DIV
422 
></DIV
423 
><DIV
424 
CLASS="NAVFOOTER"
425 
><HR
426 
ALIGN="LEFT"
427 
WIDTH="100%"><TABLE
428 
SUMMARY="Footer navigation table"
429 
WIDTH="100%"
430 
BORDER="0"
431 
CELLPADDING="0"
432 
CELLSPACING="0"
433 
><TR
434 
><TD
435 
WIDTH="33%"
436 
ALIGN="left"
437 
VALIGN="top"
438 
><A
439 
HREF="io-serial-driver-details.html"
440 
ACCESSKEY="P"
441 
>Prev</A
442 
></TD
443 
><TD
444 
WIDTH="34%"
445 
ALIGN="center"
446 
VALIGN="top"
447 
><A
448 
HREF="ecos-ref.html"
449 
ACCESSKEY="H"
450 
>Home</A
451 
></TD
452 
><TD
453 
WIDTH="33%"
454 
ALIGN="right"
455 
VALIGN="top"
456 
><A
457 
HREF="io-how-to-write-a-driver.html"
458 
ACCESSKEY="N"
459 
>Next</A
460 
></TD
461 
></TR
462 
><TR
463 
><TD
464 
WIDTH="33%"
465 
ALIGN="left"
466 
VALIGN="top"
467 
>Serial driver details</TD
468 
><TD
469 
WIDTH="34%"
470 
ALIGN="center"
471 
VALIGN="top"
472 
><A
473 
HREF="io-serial-driver-details.html"
474 
ACCESSKEY="U"
475 
>Up</A
476 
></TD
477 
><TD
478 
WIDTH="33%"
479 
ALIGN="right"
480 
VALIGN="top"
481 
>How to Write a Driver</TD
482 
></TR
483 
></TABLE
484 
></DIV
485 
></BODY
486 
></HTML
487 
>

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.