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CDC ACM fixes

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3981 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo 2011-09-27 17:05:24 +00:00
parent 0a21d7a717
commit 2947cdb45e
2 changed files with 28 additions and 4 deletions
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16
examples/README.txt
View File

@ -975,6 +975,22 @@ examples/usbterm
the local target serial console are received and forwarded to the
remote host via USB serial.
Usage:
- Build the example and load into the target FLASH
- Connect on terminal to the target RS-232 connect and configure
for 115200 8N1. For example, suppose this Tera Term on a Windows
box.
- Power up the target board
- Connect the USB to a Linux box. Use the Linux dmesg command to
assure that the connect was successful. The USB CDC ACM device
should appear as /dev/ttyACM0
- On the Linux box, open minicom with tty=/dev/ttyACM0.
Configure minicom so that (1) local characters are echoed and (2)
so that no CR is required.
- Now what you type on the target Tera Term window should echo on
the Linux minicom window and, conversely, what you type on the
minicom winow should be echo in the target Tera Term window.
Configuration options:
CONFIG_EXAMPLES_UBSTERM_BUILTIN - Build the usbterm example as an NSH

16
examples/usbterm/usbterm_main.c
View File

@ -134,9 +134,13 @@ FAR void *usbterm_listener(FAR void *parameter)
if (fgets(g_usbterm.inbuffer, CONFIG_EXAMPLES_USBTERM_BUFLEN, g_usbterm.instream))
{
/* Send the line of input via USB */
/* Echo the line on the local stdout */
fputs(g_usbterm.outbuffer, stdout);
fputs(g_usbterm.inbuffer, stdout);
/* Display the prompt string on stdout */
fputs("usbterm> ", stdout);
fflush(stdout);
}
@ -235,14 +239,14 @@ int MAIN_NAME(int argc, char *argv[])
dumptrace();
}
while (g_usbterm.outstream < 0);
while (g_usbterm.outstream == NULL);
/* Open the USB serial device for reading. Since we are already connected, this
* should not fail.
*/
g_usbterm.instream = fopen("/dev/ttyUSB0", "r");
if (g_usbterm.instream < 0)
if (g_usbterm.instream == NULL)
{
message(MAIN_STRING "ERROR: Failed to open /dev/ttyUSB0 for reading: %d\n", errno);
goto errout_with_outstream;
@ -286,6 +290,10 @@ int MAIN_NAME(int argc, char *argv[])
/* Send the line of input via USB */
fputs(g_usbterm.outbuffer, g_usbterm.outstream);
/* Display the prompt string on the remote USB serial connection */
fputs("usbterm> ", g_usbterm.outstream);
fflush(g_usbterm.outstream);
}