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376 lines
11 KiB
376 lines
11 KiB
/**************************************************************************** |
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* examples/usbterm/usbterm_main.c |
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* |
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* Copyright (C) 2011-2012 Gregory Nutt. All rights reserved. |
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* Author: Gregory Nutt <gnutt@nuttx.org> |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* 3. Neither the name NuttX nor the names of its contributors may be |
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* used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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* |
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****************************************************************************/ |
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/**************************************************************************** |
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* Included Files |
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****************************************************************************/ |
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#include <nuttx/config.h> |
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#include <sys/types.h> |
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#include <sys/stat.h> |
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#include <stdio.h> |
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#include <unistd.h> |
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#include <string.h> |
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#include <pthread.h> |
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#include <fcntl.h> |
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#include <errno.h> |
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#include <debug.h> |
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#include <apps/readline.h> |
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#include <nuttx/usb/usbdev.h> |
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#include <nuttx/usb/usbdev_trace.h> |
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#ifdef CONFIG_CDCACM |
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# include <nuttx/usb/cdcacm.h> |
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#endif |
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#ifdef CONFIG_CDCACM |
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# include <nuttx/usb/pl2303.h> |
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#endif |
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#include "usbterm.h" |
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/**************************************************************************** |
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* Definitions |
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****************************************************************************/ |
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/**************************************************************************** |
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* Private Data |
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****************************************************************************/ |
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/**************************************************************************** |
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* Public Data |
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****************************************************************************/ |
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/* USB terminal state data */ |
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struct usbterm_globals_s g_usbterm; |
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/**************************************************************************** |
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* Private Functions |
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****************************************************************************/ |
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/**************************************************************************** |
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* Name: trace_callback |
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* |
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* Description: |
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* Callback from USB trace instrumentation. |
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* |
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****************************************************************************/ |
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#ifdef CONFIG_USBDEV_TRACE |
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static int trace_callback(struct usbtrace_s *trace, void *arg) |
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{ |
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usbtrace_trprintf((trprintf_t)trmessage, trace->event, trace->value); |
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return 0; |
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} |
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#endif |
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/**************************************************************************** |
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* Name: dumptrace |
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* |
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* Description: |
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* Dump collected trace data. |
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* |
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****************************************************************************/ |
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#ifdef CONFIG_USBDEV_TRACE |
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static void dumptrace(void) |
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{ |
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(void)usbtrace_enumerate(trace_callback, NULL); |
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} |
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#else |
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# define dumptrace() |
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#endif |
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/**************************************************************************** |
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* Name: dumptrace |
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* |
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* Description: |
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* Entry point for the listener thread. |
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* |
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****************************************************************************/ |
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FAR void *usbterm_listener(FAR void *parameter) |
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{ |
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message("usbterm_listener: Waiting for remote input\n"); |
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for (;;) |
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{ |
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/* Display the prompt string on the remote USB serial connection -- only |
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* if we know that there is someone listening at the other end. The |
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* remote side must initiate the the conversation. |
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*/ |
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if (g_usbterm.peer) |
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{ |
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fputs("\rusbterm> ", g_usbterm.outstream); |
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fflush(g_usbterm.outstream); |
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} |
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/* Get the next line of input from the remote USB serial connection */ |
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if (fgets(g_usbterm.inbuffer, CONFIG_EXAMPLES_USBTERM_BUFLEN, g_usbterm.instream)) |
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{ |
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/* If we receive anything, then we can be assured that there is someone |
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* with the serial driver open on the remote host. |
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*/ |
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g_usbterm.peer = true; |
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/* Echo the line on the local stdout */ |
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fputs(g_usbterm.inbuffer, stdout); |
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/* Display the prompt string on stdout */ |
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fputs("usbterm> ", stdout); |
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fflush(stdout); |
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} |
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/* If USB tracing is enabled, then dump all collected trace data to stdout */ |
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dumptrace(); |
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} |
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/* Won't get here */ |
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return NULL; |
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} |
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/**************************************************************************** |
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* Public Functions |
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****************************************************************************/ |
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/**************************************************************************** |
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* Name: usbterm_main |
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* |
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* Description: |
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* Main entry point for the USB serial terminal example. |
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* |
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****************************************************************************/ |
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int usbterm_main(int argc, char *argv[]) |
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{ |
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pthread_attr_t attr; |
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int ret; |
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/* Initialize global data */ |
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memset(&g_usbterm, 0, sizeof(struct usbterm_globals_s)); |
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/* Initialization of the USB hardware may be performed by logic external to |
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* this test. |
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*/ |
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#ifdef CONFIG_EXAMPLES_USBTERM_DEVINIT |
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message("usbterm_main: Performing external device initialization\n"); |
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ret = usbterm_devinit(); |
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if (ret != OK) |
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{ |
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message("usbterm_main: usbterm_devinit failed: %d\n", ret); |
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goto errout; |
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} |
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#endif |
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/* Initialize the USB serial driver */ |
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message("usbterm_main: Registering USB serial driver\n"); |
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#ifdef CONFIG_CDCACM |
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ret = cdcacm_initialize(0, NULL); |
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#else |
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ret = usbdev_serialinitialize(0); |
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#endif |
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if (ret < 0) |
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{ |
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message("usbterm_main: ERROR: Failed to create the USB serial device: %d\n", -ret); |
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goto errout_with_devinit; |
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} |
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message("usbterm_main: Successfully registered the serial driver\n"); |
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#if CONFIG_USBDEV_TRACE && CONFIG_USBDEV_TRACE_INITIALIDSET != 0 |
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/* If USB tracing is enabled and tracing of initial USB events is specified, |
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* then dump all collected trace data to stdout |
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*/ |
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sleep(5); |
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dumptrace(); |
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#endif |
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/* Then, in any event, configure trace data collection as configured */ |
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usbtrace_enable(TRACE_BITSET); |
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/* Open the USB serial device for writing */ |
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do |
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{ |
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message("usbterm_main: Opening USB serial driver\n"); |
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g_usbterm.outstream = fopen(USBTERM_DEVNAME, "w"); |
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if (g_usbterm.outstream == NULL) |
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{ |
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int errcode = errno; |
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message("usbterm_main: ERROR: Failed to open " USBTERM_DEVNAME " for writing: %d\n", |
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errcode); |
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/* ENOTCONN means that the USB device is not yet connected */ |
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if (errcode == ENOTCONN) |
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{ |
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message("usbterm_main: Not connected. Wait and try again.\n"); |
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sleep(5); |
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} |
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else |
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{ |
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/* Give up on other errors */ |
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goto errout_with_devinit; |
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} |
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} |
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/* If USB tracing is enabled, then dump all collected trace data to stdout */ |
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dumptrace(); |
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} |
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while (g_usbterm.outstream == NULL); |
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/* Open the USB serial device for reading. Since we are already connected, this |
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* should not fail. |
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*/ |
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g_usbterm.instream = fopen(USBTERM_DEVNAME, "r"); |
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if (g_usbterm.instream == NULL) |
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{ |
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message("usbterm_main: ERROR: Failed to open " USBTERM_DEVNAME " for reading: %d\n", errno); |
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goto errout_with_outstream; |
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} |
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message("usbterm_main: Successfully opened the serial driver\n"); |
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/* Start the USB term listener thread */ |
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message("usbterm_main: Starting the listener thread\n"); |
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ret = pthread_attr_init(&attr); |
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if (ret != OK) |
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{ |
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message("usbterm_main: pthread_attr_init failed: %d\n", ret); |
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goto errout_with_streams; |
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} |
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ret = pthread_create(&g_usbterm.listener, &attr, |
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usbterm_listener, (pthread_addr_t)0); |
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if (ret != 0) |
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{ |
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message("usbterm_main: Error in thread creation: %d\n", ret); |
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goto errout_with_streams; |
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} |
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/* Send messages and get responses -- forever */ |
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message("usbterm_main: Waiting for local input\n"); |
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for (;;) |
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{ |
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/* Display the prompt string on stdout */ |
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fputs("usbterm> ", stdout); |
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fflush(stdout); |
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/* Get the next line of input */ |
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#ifdef CONFIG_EXAMPLES_USBTERM_FGETS |
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/* fgets returns NULL on end-of-file or any I/O error */ |
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if (fgets(g_usbterm.outbuffer, CONFIG_EXAMPLES_USBTERM_BUFLEN, stdin) == NULL) |
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{ |
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printf("ERROR: fgets failed: %d\n", errno); |
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return 1; |
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} |
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#else |
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ret = readline(g_usbterm.outbuffer, CONFIG_EXAMPLES_USBTERM_BUFLEN, stdin, stdout); |
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/* Readline normally returns the number of characters read, |
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* but will return 0 on end of file or a negative value |
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* if an error occurs. Either will cause the session to |
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* terminate. |
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*/ |
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if (ret <= 0) |
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{ |
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printf("ERROR: readline failed: %d\n", ret); |
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return 1; |
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} |
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#endif |
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/* Is there anyone listening on the other end? */ |
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else if (g_usbterm.peer) |
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{ |
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/* Yes.. Send the line of input via USB */ |
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fputs(g_usbterm.outbuffer, g_usbterm.outstream); |
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/* Display the prompt string on the remote USB serial connection */ |
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fputs("\rusbterm> ", g_usbterm.outstream); |
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fflush(g_usbterm.outstream); |
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} |
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else |
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{ |
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printf("Still waiting for remote peer. Please try again later.\n", ret); |
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} |
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/* If USB tracing is enabled, then dump all collected trace data to stdout */ |
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dumptrace(); |
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} |
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/* Error exits */ |
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errout_with_streams: |
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fclose(g_usbterm.instream); |
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errout_with_outstream: |
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fclose(g_usbterm.outstream); |
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errout_with_devinit: |
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#ifdef CONFIG_EXAMPLES_USBTERM_DEVINIT |
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usbterm_devuninit(); |
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errout: |
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#endif |
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message("usbterm_main: Aborting\n"); |
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return 1; |
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} |
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