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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Jeferson,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-US
style='font-size:10.0pt;font-family:Arial;color:navy'>Try to incriese the
number of termio file descriptors:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-US
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-US
style='font-size:10.0pt;font-family:Arial;color:navy'>#define </span></font><span
lang=EN-US>CONFIGURE_NUMBER_OF_TERMIOS_PORTS 6</span><font size=2 color=navy
face=Arial><span lang=EN-US style='font-size:10.0pt;font-family:Arial;
color:navy'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-US
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-US
style='font-size:10.0pt;font-family:Arial;color:navy'>Regards,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-US
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-US
style='font-size:10.0pt;font-family:Arial;color:navy'>Wendell.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-US
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>De:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
rtems-users-bounces@rtems.org [mailto:rtems-users-bounces@rtems.org] <b><span
style='font-weight:bold'>Em nome de </span></b>Jeferson Luiz Rodrigues Souza<br>
<b><span style='font-weight:bold'>Enviada em:</span></b> terça-feira, 23 de
novembro de 2010 13:25<br>
<b><span style='font-weight:bold'>Para:</span></b> Joel Sherrill<br>
<b><span style='font-weight:bold'>Cc:</span></b> rtems-users@rtems.org<br>
<b><span style='font-weight:bold'>Assunto:</span></b> Re: Serial device access
with qemu!</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>Dear Joel,<o:p></o:p></span></font></p>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>On Tue, Nov 23, 2010 at 2:21 PM, Joel Sherrill <<a
href="mailto:joel.sherrill@oarcorp.com">joel.sherrill@oarcorp.com</a>>
wrote:<o:p></o:p></span></font></p>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>On 11/23/2010 02:50 AM, Jeferson Luiz Rodrigues Souza wrote:<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>Hi everyone,<br>
<br>
I am trying to access a serial port in RTEMS 4.9.4 using a pc586 bsp. However,
when I execute the application using qemu the code cannot open the device, and
the perror() function presents the following message: "No such file or
directory". It seems that RTEMS did not initialize a properly driver to
handle serial device. Is it right?<br>
<br>
The qemu command line is:<br>
<br>
sudo qemu -serial "/dev/ttyS0" -fda floppy.img -boot a<br>
<br>
I made a search in this list and I found references about serial port access
but nothing to help in my case. Could anyone help me or point me some
documentation about serial port access in RTEMS?<br>
<br>
The code used in the test is presented below. I do not have some experience
with RTEMS and I do not know the source of this problem.<o:p></o:p></span></font></p>
</div>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>The /dev/ttyS0 above is
the host serial port. The -serial says<br>
attach attach the serial port COM1 on the target simulator<br>
PC to the specified device. So you are attaching the virtual<br>
COM1 to the real serial port on the host /dev/ttyS0. Is that<br>
what you intend to do?<br>
<br>
FWIW COM1 --> /dev/ttyS1<br>
COM2 --> /dev/ttyS2<br>
<br>
on the RTEMS target.<o:p></o:p></span></font></p>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><br>
I need to read some data from a device connected in the host serial port (e.g.
/dev/ttyS0) inside an application running in RTEMS with qemu. So, is my
source code correct? or Do I need some extra configuration?<br>
<br>
Where is the name of serial devices in RTEMS defined? I tried use the open()
function as follows:<br>
<br>
int serial_fp = open("/dev/ttyS0",O_RDONLY);<br>
or <br>
int serial_fp = open("/dev/ttyS1",O_RDONLY);<br>
or<br>
int serial_fp = open("COM1",O_RDONLY);<br>
<br>
and got the same message when I checked the serial_fp value and print the error
message using perror() function: "No such file or directory"<br>
<br>
Thanks to reply,<br>
<br>
Best regards,<br>
Jeferson.<br>
<o:p></o:p></span></font></p>
</div>
<blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;
margin-left:4.8pt;margin-right:0cm'>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>--joel<o:p></o:p></span></font></p>
<div>
<div>
<blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;
margin-left:4.8pt;margin-right:0cm'>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Thanks,<br>
jefecomp.<br>
<br>
<br>
#include <signal.h><br>
#include <stdlib.h><br>
#include <stdio.h><br>
#include <pthread.h><br>
#include <uart.h><br>
#include <termios.h><br>
#include<sched.h><br>
#include <bsp.h><br>
#include <fcntl.h><br>
#include <sys/types.h><br>
#include <sys/stat.h><br>
<br>
#define CONFIGURE_INIT<br>
#include <rtems.h><br>
<br>
<br>
void *POSIX_Init();<br>
<br>
#define CONFIGURE_APPLICATION_NEEDS_CONSOLE_DRIVER<br>
#define CONFIGURE_APPLICATION_NEEDS_CLOCK_DRIVER<br>
#define CONFIGURE_APPLICATIONS_NEEDS_RTC_DRIVER<br>
#define CONFIGURE_MICROSECONDS_PER_TICK 1000<br>
<br>
#define CONFIGURE_MAXIMUM_POSIX_THREADS 10<br>
#define CONFIGURE_MAXIMUM_POSIX_CONDITION_VARIABLES 10<br>
#define CONFIGURE_MAXIMUM_POSIX_MUTEXES 10<br>
#define CONFIGURE_MAXIMUM_POSIX_SEMAPHORES 10<br>
#define CONFIGURE_MAXIMUM_POSIX_TIMERS 10<br>
#define CONFIGURE_MAXIMUM_POSIX_QUEUED_SIGNALS 40<br>
#define CONFIGURE_MAXIMUM_POSIX_MESSAGE_QUEUES 10<br>
#define CONFIGURE_POSIX_INIT_THREAD_TABLE<br>
#define CONFIGURE_LIBIO_MAXIMUM_FILE_DESCRIPTORS 5<br>
#define CONFIGURE_NUMBER_OF_TERMIOS_PORTS 3<br>
#include<rtems/confdefs.h><br>
<br>
void *POSIX_Init()<br>
{<br>
printf("Serial Port Test!!!\n");<br>
<br>
char buffer[255];<br>
int bytesRead;<br>
int serial_fp = open("/dev/ttyS0",O_RDONLY);<br>
<br>
printf("SERIAL_FP = %i\n",serial_fp);<br>
<br>
if(serial_fp < 0)<br>
{<br>
printf("FAILURE TO OPEN SERIAL PORT\n");<br>
perror(serial_fp);<br>
exit(-1);<br>
}<br>
<br>
//write(serial_fp,buffer,strlen(buffer)+1);<br>
bytesRead = read(serial_fp, buffer, 255);<br>
<br>
<br>
if(bytesRead < 0)<br>
{<br>
printf("Problems in the read of Serial
Port");<br>
close(serial_fp);<br>
exit(1);<br>
}<br>
else<br>
buffer[bytesRead] = 0;<br>
<br>
<br>
printf(buffer);<br>
<br>
close(serial_fp);<br>
exit(0);<br>
}<o:p></o:p></span></font></p>
</blockquote>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'><o:p> </o:p></span></font></p>
</div>
</div>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3 color="#888888"
face="Times New Roman"><span style='font-size:12.0pt;color:#888888'>-- <br>
Joel Sherrill, Ph.D. Director of
Research& Development<br>
joel.sherrill@OARcorp.com On-Line Applications
Research<br>
Ask me about RTEMS: a free RTOS Huntsville AL 35805<br>
Support Available (256)
722-9985<br>
<br>
</span></font><o:p></o:p></p>
</blockquote>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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