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Diffstat (limited to 'apps/examples/usbserial/main.c')
| -rw-r--r-- | apps/examples/usbserial/main.c | 466 |
1 files changed, 466 insertions, 0 deletions
diff --git a/apps/examples/usbserial/main.c b/apps/examples/usbserial/main.c new file mode 100644 index 000000000..17aef1c79 --- /dev/null +++ b/apps/examples/usbserial/main.c @@ -0,0 +1,466 @@ +/**************************************************************************** + * examples/usbserial/main.c + * + * Copyright (C) 2008, 2010 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <sys/types.h> +#include <sys/stat.h> +#include <stdio.h> +#include <unistd.h> +#include <string.h> +#include <fcntl.h> +#include <errno.h> +#include <debug.h> + +#include <nuttx/usb/usbdev.h> +#include <nuttx/usb/usbdev_trace.h> + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +#if defined(CONFIG_EXAMPLES_USBSERIAL_INONLY) && defined(CONFIG_EXAMPLES_USBSERIAL_OUTONLY) +# error "Cannot define both CONFIG_EXAMPLES_USBSERIAL_INONLY and _OUTONLY" +#endif +#if defined(CONFIG_EXAMPLES_USBSERIAL_ONLYSMALL) && defined(CONFIG_EXAMPLES_USBSERIAL_ONLYBIG) +# error "Cannot define both CONFIG_EXAMPLES_USBSERIAL_ONLYSMALL and _ONLYBIG" +#endif + +#if !defined(CONFIG_EXAMPLES_USBSERIAL_ONLYBIG) && !defined(CONFIG_EXAMPLES_USBSERIAL_ONLYSMALL) +# ifndef CONFIG_EXAMPLES_USBSERIAL_OUTONLY +# define COUNTER_NEEDED 1 +# endif +#endif +#ifdef CONFIG_EXAMPLES_USBSERIAL_TRACEINIT +# define TRACE_INIT_BITS (TRACE_INIT_BIT) +#else +# define TRACE_INIT_BITS (0) +#endif + +#define TRACE_ERROR_BITS (TRACE_DEVERROR_BIT|TRACE_CLSERROR_BIT) + +#ifdef CONFIG_EXAMPLES_USBSERIAL_TRACECLASS +# define TRACE_CLASS_BITS (TRACE_CLASS_BIT|TRACE_CLASSAPI_BIT|TRACE_CLASSSTATE_BIT) +#else +# define TRACE_CLASS_BITS (0) +#endif + +#ifdef CONFIG_EXAMPLES_USBSERIAL_TRACETRANSFERS +# define TRACE_TRANSFER_BITS (TRACE_OUTREQQUEUED_BIT|TRACE_INREQQUEUED_BIT|TRACE_READ_BIT|\ + TRACE_WRITE_BIT|TRACE_COMPLETE_BIT) +#else +# define TRACE_TRANSFER_BITS (0) +#endif + +#ifdef CONFIG_EXAMPLES_USBSERIAL_TRACECONTROLLER +# define TRACE_CONTROLLER_BITS (TRACE_EP_BIT|TRACE_DEV_BIT) +#else +# define TRACE_CONTROLLER_BITS (0) +#endif + +#ifdef CONFIG_EXAMPLES_USBSERIAL_TRACEINTERRUPTS +# define TRACE_INTERRUPT_BITS (TRACE_INTENTRY_BIT|TRACE_INTDECODE_BIT|TRACE_INTEXIT_BIT) +#else +# define TRACE_INTERRUPT_BITS (0) +#endif + +#define TRACE_BITSET (TRACE_INIT_BITS|TRACE_ERROR_BITS|TRACE_CLASS_BITS|\ + TRACE_TRANSFER_BITS|TRACE_CONTROLLER_BITS|TRACE_INTERRUPT_BITS) + +#ifdef CONFIG_CPP_HAVE_VARARGS +# ifdef CONFIG_DEBUG +# define message(...) lib_lowprintf(__VA_ARGS__) +# define trmessage lib_lowprintf +# else +# define message(...) printf(__VA_ARGS__) +# define trmessage printf +# endif +#else +# ifdef CONFIG_DEBUG +# define message lib_lowprintf +# define trmessage lib_lowprintf +# else +# define message printf +# define trmessage printf +# endif +#endif + +#define IOBUFFER_SIZE 256 + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +#ifndef CONFIG_EXAMPLES_USBSERIAL_ONLYBIG +static const char g_shortmsg[] = "Hello, World!!\n"; +#endif + +#ifndef CONFIG_EXAMPLES_USBSERIAL_ONLYSMALL +static const char g_longmsg[] = + "The Spanish Armada a Speech by Queen Elizabeth I of England\n" + "Addressed to the English army at Tilbury Fort - 1588\n" + "My loving people, we have been persuaded by some, that are careful of our " + "safety, to take heed how we commit ourselves to armed multitudes, for fear " + "of treachery; but I assure you, I do not desire to live to distrust my " + "faithful and loving people.\n" + "Let tyrants fear; I have always so behaved myself that, under God, I have " + "placed my chiefest strength and safeguard in the loyal hearts and good will " + "of my subjects. And therefore I am come amongst you at this time, not as for " + "my recreation or sport, but being resolved, in the midst and heat of the " + "battle, to live or die amongst you all; to lay down, for my God, and for " + "my kingdom, and for my people, my honour and my blood, even the dust.\n" + "I know I have but the body of a weak and feeble woman; but I have the heart " + "of a king, and of a king of England, too; and think foul scorn that Parma " + "or Spain, or any prince of Europe, should dare to invade the borders of my " + "realms: to which, rather than any dishonour should grow by me, I myself will " + "take up arms; I myself will be your general, judge, and rewarder of every " + "one of your virtues in the field.\n" + "I know already, by your forwardness, that you have deserved rewards and " + "crowns; and we do assure you, on the word of a prince, they shall be duly " + "paid you. In the mean my lieutenant general shall be in my stead, than whom " + "never prince commanded a more noble and worthy subject; not doubting by " + "your obedience to my general, by your concord in the camp, and by your " + "valour in the field, we shall shortly have a famous victory over the enemies " + "of my God, of my kingdom, and of my people.\n"; +#endif + +#ifndef CONFIG_EXAMPLES_USBSERIAL_INONLY +static char g_iobuffer[IOBUFFER_SIZE]; +#endif + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +#ifdef CONFIG_USBDEV_TRACE +static int trace_callback(struct usbtrace_s *trace, void *arg) +{ + usbtrace_trprintf((trprintf_t)trmessage, trace->event, trace->value); + return 0; +} + +static void dumptrace(void) +{ + (void)usbtrace_enumerate(trace_callback, NULL); +} +#else +# define dumptrace() +#endif + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * user_initialize + ****************************************************************************/ + +#ifndef CONFIG_HAVE_WEAKFUNCTIONS +void user_initialize(void) +{ + /* Stub that must be provided only if the toolchain does not support weak + * functions. + */ +} +#endif + +/**************************************************************************** + * user_start + ****************************************************************************/ + +int user_start(int argc, char *argv[]) +{ +#ifndef CONFIG_EXAMPLES_USBSERIAL_INONLY + int infd; +#endif +#ifndef CONFIG_EXAMPLES_USBSERIAL_OUTONLY + int outfd; +#endif +#ifdef COUNTER_NEEDED + int count = 0; +#endif + ssize_t nbytes; +#ifndef CONFIG_EXAMPLES_USBSERIAL_INONLY + int i, j, k; +#endif + int ret; + + /* Initialize the USB serial driver */ + + message("user_start: Registering USB serial driver\n"); + ret = usbdev_serialinitialize(0); + if (ret < 0) + { + message("user_start: ERROR: Failed to create the USB serial device: %d\n", -ret); + return 1; + } + message("user_start: Successfully registered the serial driver\n"); + +#if CONFIG_USBDEV_TRACE && CONFIG_USBDEV_TRACE_INITIALIDSET != 0 + /* If USB tracing is enabled and tracing of initial USB events is specified, + * then dump all collected trace data to stdout + */ + + sleep(5); + dumptrace(); +#endif + + /* Then, in any event, configure trace data collection as configured */ + + usbtrace_enable(TRACE_BITSET); + + /* Open the USB serial device for writing (blocking) */ + +#ifndef CONFIG_EXAMPLES_USBSERIAL_OUTONLY + do + { + message("user_start: Opening USB serial driver\n"); + outfd = open("/dev/ttyUSB0", O_WRONLY); + if (outfd < 0) + { + int errcode = errno; + message("user_start: ERROR: Failed to open /dev/ttyUSB0 for writing: %d\n", errcode); + + /* ENOTCONN means that the USB device is not yet connected */ + + if (errcode == ENOTCONN) + { + message("user_start: Not connected. Wait and try again.\n"); + sleep(5); + } + else + { + /* Give up on other errors */ + + message("user_start: Aborting\n"); + return 2; + } + } + + /* If USB tracing is enabled, then dump all collected trace data to stdout */ + + dumptrace(); + } + while (outfd < 0); +#endif + + /* Open the USB serial device for reading (non-blocking) */ + +#ifndef CONFIG_EXAMPLES_USBSERIAL_INONLY +#ifndef CONFIG_EXAMPLES_USBSERIAL_OUTONLY + infd = open("/dev/ttyUSB0", O_RDONLY|O_NONBLOCK); + if (infd < 0) + { + message("user_start: ERROR: Failed to open /dev/ttyUSB0 for reading: %d\n", errno); + close(outfd); + return 3; + } +#else + do + { + infd = open("/dev/ttyUSB0", O_RDONLY|O_NONBLOCK); + if (infd < 0) + { + int errcode = errno; + message("user_start: ERROR: Failed to open /dev/ttyUSB0 for reading: %d\n", errno); + + /* ENOTCONN means that the USB device is not yet connected */ + + if (errcode == ENOTCONN) + { + message("user_start: Not connected. Wait and try again.\n"); + sleep(5); + } + else + { + /* Give up on other errors */ + + message("user_start: Aborting\n"); + return 3; + } + } + + /* If USB tracing is enabled, then dump all collected trace data to stdout */ + + dumptrace(); + } + while (infd < 0); +#endif +#endif + + message("user_start: Successfully opened the serial driver\n"); + + /* Send messages and get responses -- forever */ + + for (;;) + { + /* Test IN (device-to-host) messages */ + +#ifndef CONFIG_EXAMPLES_USBSERIAL_OUTONLY +#if !defined(CONFIG_EXAMPLES_USBSERIAL_ONLYBIG) && !defined(CONFIG_EXAMPLES_USBSERIAL_ONLYSMALL) + if (count < 8) + { + message("user_start: Saying hello\n"); + nbytes = write(outfd, g_shortmsg, sizeof(g_shortmsg)); + count++; + } + else + { + message("user_start: Reciting QEI's speech of 1588\n"); + nbytes = write(outfd, g_longmsg, sizeof(g_longmsg)); + count = 0; + } +#elif !defined(CONFIG_EXAMPLES_USBSERIAL_ONLYSMALL) + message("user_start: Reciting QEI's speech of 1588\n"); + nbytes = write(outfd, g_longmsg, sizeof(g_longmsg)); +#else /* !defined(CONFIG_EXAMPLES_USBSERIAL_ONLYBIG) */ + message("user_start: Saying hello\n"); + nbytes = write(outfd, g_shortmsg, sizeof(g_shortmsg)); +#endif + + /* Test if the write was successful */ + + if (nbytes < 0) + { + message("user_start: ERROR: write failed: %d\n", errno); +#ifndef CONFIG_EXAMPLES_USBSERIAL_INONLY + close(infd); +#endif + close(outfd); + return 4; + } + message("user_start: %d bytes sent\n", nbytes); +#endif /* CONFIG_EXAMPLES_USBSERIAL_OUTONLY */ + + /* Test OUT (host-to-device) messages */ + +#ifndef CONFIG_EXAMPLES_USBSERIAL_INONLY + /* Poll for incoming messages */ + + message("user_start: Polling for OUT messages\n"); + for (i = 0; i < 5; i++) + { + memset(g_iobuffer, 'X', IOBUFFER_SIZE); + nbytes = read(infd, g_iobuffer, IOBUFFER_SIZE); + if (nbytes < 0) + { + int errorcode = errno; + if (errorcode != EAGAIN) + { + message("user_start: ERROR: read failed: %d\n", errno); + close(infd); +#ifndef CONFIG_EXAMPLES_USBSERIAL_OUTONLY + close(outfd); +#endif + return 6; + } + } + else + { + message("user_start: Received %d bytes:\n", nbytes); + if (nbytes > 0) + { + for (j = 0; j < nbytes; j += 16) + { + message("user_start: %03x: ", j); + for (k = 0; k < 16; k++) + { + if (k == 8) + { + message(" "); + } + if (j+k < nbytes) + { + message("%02x", g_iobuffer[j+k]); + } + else + { + message(" "); + } + } + message(" "); + for (k = 0; k < 16; k++) + { + if (k == 8) + { + message(" "); + } + if (j+k < nbytes) + { + if (g_iobuffer[j+k] >= 0x20 && g_iobuffer[j+k] < 0x7f) + { + message("%c", g_iobuffer[j+k]); + } + else + { + message("."); + } + } + else + { + message(" "); + } + } + message("\n"); + } + } + } + sleep(1); + } +#else /* CONFIG_EXAMPLES_USBSERIAL_INONLY */ + message("user_start: Waiting\n"); + sleep(5); +#endif /* CONFIG_EXAMPLES_USBSERIAL_INONLY */ + + /* If USB tracing is enabled, then dump all collected trace data to stdout */ + + dumptrace(); + } + + /* Won't get here, but if we did this what we would have to do */ + +#ifndef CONFIG_EXAMPLES_USBSERIAL_INONLY + close(infd); +#endif +#ifndef CONFIG_EXAMPLES_USBSERIAL_OUTONLY + close(outfd); +#endif + return 0; +} + |