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system/cu: Merge infd and outfd into devfd

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to avoid opening the same device twice since
some special device can't work in this case

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
This commit is contained in:
Xiang Xiao 2023-09-04 02:35:38 +08:00 committed by Alin Jerpelea
parent 5cced37a1b
commit 3ff51d108b
2 changed files with 18 additions and 33 deletions
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3
system/cu/cu.h
View File

@ -71,8 +71,7 @@
struct cu_globals_s
{
int infd; /* Incoming data from serial port */
int outfd; /* Outgoing data to serial port */
int devfd; /* I/O data to serial port */
int stdfd; /* I/O data to standard console */
struct termios devtio; /* Original serial port setting */
struct termios stdtio; /* Original standard console setting */

48
system/cu/cu_main.c
View File

@ -104,7 +104,7 @@ static FAR void *cu_listener(FAR void *parameter)
int rc;
char ch;
rc = read(cu->infd, &ch, 1);
rc = read(cu->devfd, &ch, 1);
if (rc <= 0)
{
break;
@ -176,7 +176,7 @@ static int set_termios(FAR struct cu_globals_s *cu, int nocrlf)
tio.c_oflag |= ONLCR;
}
ret = tcsetattr(cu->outfd, TCSANOW, &tio);
ret = tcsetattr(cu->devfd, TCSANOW, &tio);
if (ret)
{
cu_error("set_termios: ERROR during tcsetattr(): %d\n", errno);
@ -209,7 +209,7 @@ errout:
static void retrieve_termios(FAR struct cu_globals_s *cu)
{
tcsetattr(cu->outfd, TCSANOW, &cu->devtio);
tcsetattr(cu->devfd, TCSANOW, &cu->devtio);
if (cu->stdfd >= 0)
{
tcsetattr(cu->stdfd, TCSANOW, &cu->stdtio);
@ -355,10 +355,10 @@ int main(int argc, FAR char *argv[])
return exitval;
}
/* Open the serial device for writing */
/* Open the serial device for reading and writing */
cu->outfd = open(devname, O_WRONLY);
if (cu->outfd < 0)
cu->devfd = open(devname, O_RDWR);
if (cu->devfd < 0)
{
cu_error("cu_main: ERROR: Failed to open %s for writing: %d\n",
devname, errno);
@ -367,11 +367,11 @@ int main(int argc, FAR char *argv[])
/* Remember serial device termios attributes */
ret = tcgetattr(cu->outfd, &cu->devtio);
ret = tcgetattr(cu->devfd, &cu->devtio);
if (ret)
{
cu_error("cu_main: ERROR during tcgetattr(): %d\n", errno);
goto errout_with_outfd;
goto errout_with_devfd;
}
/* Remember std termios attributes if it is a tty. Try to select
@ -406,19 +406,7 @@ int main(int argc, FAR char *argv[])
if (set_termios(cu, nocrlf) != 0)
#endif
{
goto errout_with_outfd_retrieve;
}
/* Open the serial device for reading. Since we are already connected,
* this should not fail.
*/
cu->infd = open(devname, O_RDONLY);
if (cu->infd < 0)
{
cu_error("cu_main: ERROR: Failed to open %s for reading: %d\n",
devname, errno);
goto errout_with_outfd;
goto errout_with_devfd_retrieve;
}
/* Start the serial receiver thread */
@ -427,7 +415,7 @@ int main(int argc, FAR char *argv[])
if (ret != OK)
{
cu_error("cu_main: pthread_attr_init failed: %d\n", ret);
goto errout_with_fds;
goto errout_with_devfd_retrieve;
}
/* Set priority of listener to configured value */
@ -439,7 +427,7 @@ int main(int argc, FAR char *argv[])
if (ret != 0)
{
cu_error("cu_main: Error in thread creation: %d\n", ret);
goto errout_with_fds;
goto errout_with_devfd_retrieve;
}
/* Send messages and get responses -- forever */
@ -458,7 +446,7 @@ int main(int argc, FAR char *argv[])
if (nobreak == 1)
{
write(cu->outfd, &ch, 1);
write(cu->devfd, &ch, 1);
continue;
}
@ -474,7 +462,7 @@ int main(int argc, FAR char *argv[])
{
/* Escaping a tilde: handle like normal char */
write(cu->outfd, &ch, 1);
write(cu->devfd, &ch, 1);
continue;
}
else
@ -488,7 +476,7 @@ int main(int argc, FAR char *argv[])
/* Normal character */
write(cu->outfd, &ch, 1);
write(cu->devfd, &ch, 1);
/* Determine if we are now at the start of a new line or not */
@ -507,12 +495,10 @@ int main(int argc, FAR char *argv[])
/* Error exits */
errout_with_fds:
close(cu->infd);
errout_with_outfd_retrieve:
errout_with_devfd_retrieve:
retrieve_termios(cu);
errout_with_outfd:
close(cu->outfd);
errout_with_devfd:
close(cu->devfd);
errout_with_devinit:
return exitval;
}