diff options
Diffstat (limited to 'nuttx/examples/usbserial')
-rw-r--r-- | nuttx/examples/usbserial/Makefile.host | 49 | ||||
-rw-r--r-- | nuttx/examples/usbserial/host.c | 202 | ||||
-rw-r--r-- | nuttx/examples/usbserial/main.c | 121 |
3 files changed, 350 insertions, 22 deletions
diff --git a/nuttx/examples/usbserial/Makefile.host b/nuttx/examples/usbserial/Makefile.host new file mode 100644 index 000000000..ea394090b --- /dev/null +++ b/nuttx/examples/usbserial/Makefile.host @@ -0,0 +1,49 @@ +############################################################################ +# examples/usbserial/Makefile.host +# +# Copyright (C) 2008 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. +# +############################################################################ + +-include $(TOPDIR)/.config +-include $(TOPDIR)/Make.defs + +SRC = host.c +BIN = host + +all: $(BIN)$(EXEEXT) + +$(BIN)$(EXEEXT): $(SRC) + $(HOSTCC) $(HOSTCFLAGS) $^ -o $@ + +clean: + @rm -f $(BIN) *~ .*.swp *.o + $(call CLEAN) diff --git a/nuttx/examples/usbserial/host.c b/nuttx/examples/usbserial/host.c new file mode 100644 index 000000000..ac805467c --- /dev/null +++ b/nuttx/examples/usbserial/host.c @@ -0,0 +1,202 @@ +/**************************************************************************** + * examples/usbserial/host.c + * + * Copyright (C) 2008 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 <stdio.h> + +#include <sys/types.h> +#include <sys/stat.h> +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <string.h> +#include <fcntl.h> +#include <errno.h> + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +#define DEFAULT_TTYDEV "/dev/ttyUSB0" +#define BUFFER_SIZE 1024 + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +static const char *g_ttydev = DEFAULT_TTYDEV; +static char g_buffer[BUFFER_SIZE]; +static const char g_outmsg[] = + "I am proud to come to this city as the guest of your distinguished Mayor, " + "who has symbolized throughout the world the fighting spirit of West Berlin. " + "And I am proud to visit the Federal Republic with your distinguished Chancellor " + "who for so many years has committed Germany to democracy and freedom and " + "progress, and to come here in the company of my fellow American, General Clay, " + "who has been in this city during its great moments of crisis and will come " + "again if ever needed.\n" + "Two thousand years ago the proudest boast was \"civis Romanus sum.\" Today, " + "in the world of freedom, the proudest boast is \"Ich bin ein Berliner.\"\r\"" + "I appreciate my interpreter translating my German!\n" + "There are many people in the world who really don't understand, or say they " + "don't, what is the great issue between the free world and the Communist world. " + "Let them come to Berlin. There are some who say that communism is the wave of " + "the future. Let them come to Berlin. And there are some who say in Europe and " + "elsewhere we can work with the Communists. Let them come to Berlin. And there " + "are even a few who say that it is true that communism is an evil system, but it " + "permits us to make economic progress. Lass' sie nach Berlin kommen. Let them " + "come to Berlin.\n" + "Freedom has many difficulties and democracy is not perfect, but we have never " + "had to put a wall up to keep our people in, to prevent them from leaving us. I " + "want to say, on behalf of my countrymen, who live many miles away on the other " + "side of the Atlantic, who are far distant from you, that they take the greatest " + "pride that they have been able to share with you, even from a distance, the " + "story of the last 18 years. I know of no town, no city, that has been besieged " + "for 18 years that still lives with the vitality and the force, and the hope and " + "the determination of the city of West Berlin. While the wall is the most obvious " + "and vivid demonstration of the failures of the Communist system, for all the " + "world to see, we take no satisfaction in it, for it is, as your Mayor has said, " + "an offense not only against history but an offense against humanity, separating " + "families, dividing husbands and wives and brothers and sisters, and dividing a " + "people who wish to be joined together.\n" + "What is true of this city is true of Germany--real, lasting peace in Europe can " + "never be assured as long as one German out of four is denied the elementary " + "right of free men, and that is to make a free choice. In 18 years of peace and " + "good faith, this generation of Germans has earned the right to be free, " + "including the right to unite their families and their nation in lasting peace, " + "with good will to all people. You live in a defended island of freedom, but " + "your life is part of the main. So let me ask you as I close, to lift your eyes " + "beyond the dangers of today, to the hopes of tomorrow, beyond the freedom merely " + "of this city of Berlin, or your country of Germany, to the advance of freedom " + "everywhere, beyond the wall to the day of peace with justice, beyond yourselves " + "and ourselves to all mankind.\n" + "Freedom is indivisible, and when one man is enslaved, all are not free. When all " + "are free, then we can look forward to that day when this city will be joined as " + "one and this country and this great Continent of Europe in a peaceful and hopeful " + "globe. When that day finally comes, as it will, the people of West Berlin can take " + "sober satisfaction in the fact that they were in the front lines for almost two " + "decades.\n" + "All free men, wherever they may live, are citizens of Berlin, and, therefore, " + "as a free man, I take pride in the words \"Ich bin ein Berliner.\"\n" + "President John F. Kennedy - June 26, 1963\n"; + +/**************************************************************************** + * show_usage + ****************************************************************************/ + +static void show_usage(const char *progname, int exitcode) +{ + fprintf(stderr, "USAGE: %s [<ttydev>]\n", progname); + exit(exitcode); +} + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * main + ****************************************************************************/ + +int main(int argc, char **argv, char **envp) +{ + ssize_t nbytes; + int fd; + + /* Handle input parameters */ + + if (argc > 1) + { + if (argc > 2) + { + fprintf(stderr, "Too many arguments on command line\n"); + show_usage(argv[0], 1); + } + g_ttydev = argv[1]; + } + + /* Open the USB serial device for blocking read/write */ + + do + { + printf("main: Opening USB serial driver\n"); + fd = open(g_ttydev, O_RDWR); + if (fd < 0) + { + printf("main: ERROR: Failed to open %s: %s\n", g_ttydev, strerror(errno)); + printf("main: Assume not connected. Wait and try again.\n"); + printf("main: (Control-C to terminate).\n"); + sleep(5); + } + } + while (fd < 0); + printf("main: Successfully opened the serial driver\n"); + + /* Wait for hello... */ + + for (;;) + { + printf("main: Reading from the serial driver\n"); + printf("main: ... (Control-C to terminate) ...\n"); + nbytes = read(fd, g_buffer, BUFFER_SIZE-1); + if (nbytes < 0) + { + printf("main: ERROR: Failed to read from %s: %s\n", g_ttydev, strerror(errno)); + close(fd); + return 2; + } + + g_buffer[nbytes] = '\0'; + printf("main: Received %d bytes:\n", nbytes); + printf(" \"%s\"\n", g_buffer); + printf("main: Sending %d bytes..\n", sizeof(g_outmsg)); + nbytes = write(fd, g_outmsg, sizeof(g_outmsg)); + if (nbytes < 0) + { + printf("main: ERROR: Failed to write to %s: %s\n", g_ttydev, strerror(errno)); + close(fd); + return 2; + } + printf("main: %d bytes sent\n", nbytes); + } + + /* Won't get here, but if we did this what we would have to do */ + + close(fd); + return 0; +} + diff --git a/nuttx/examples/usbserial/main.c b/nuttx/examples/usbserial/main.c index 11afce34f..9a890a2ad 100644 --- a/nuttx/examples/usbserial/main.c +++ b/nuttx/examples/usbserial/main.c @@ -39,8 +39,11 @@ #include <nuttx/config.h> +#include <sys/types.h> +#include <sys/stat.h> #include <stdio.h> #include <unistd.h> +#include <fcntl.h> #include <errno.h> #include <debug.h> @@ -64,10 +67,41 @@ # endif #endif +#define IOBUFFER_SIZE 256 + /**************************************************************************** * Private Data ****************************************************************************/ +static const char g_shortmsg[] = "Hello, World!!\n"; +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"; +static char g_iobuffer[IOBUFFER_SIZE]; + /**************************************************************************** * Public Functions ****************************************************************************/ @@ -91,8 +125,12 @@ void user_initialize(void) int user_start(int argc, char *argv[]) { - FILE *stream; + int infd; + int outfd; + int count; + ssize_t nbytes; int ret; + int i; /* Initialize the USB serial driver */ @@ -105,27 +143,24 @@ int user_start(int argc, char *argv[]) } message("user_start: Successfully registered the serial driver\n"); - /* Open the USB serial device for output */ + /* Open the USB serial device for writing (blocking) */ do { message("user_start: Opening USB serial driver\n"); - stream = fopen("/dev/ttyUSB0", "w"); - if (!stream) + outfd = open("/dev/ttyUSB0", O_WRONLY); + if (outfd < 0) { int errcode = errno; - message("user_start: ERROR: Failed to open /dev/ttyUSB0: %d\n", errcode); + 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 0 /* BUG: May report the wrong error */ if (errcode == ENOTCONN) -#endif { message("user_start: Not connected. Wait and try again.\n"); sleep(5); } -#if 0 /* BUG: May report the wrong error */ else { /* Give up on other errors */ @@ -133,40 +168,82 @@ int user_start(int argc, char *argv[]) message("user_start: Aborting\n"); return 2; } -#endif } } - while (!stream); + while (outfd < 0); + + /* Open the USB serial device for reading (non-blocking) */ + + 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; + } + message("user_start: Successfully opened the serial driver\n"); /* Then say hello -- forever */ + count = 0; for (;;) { - message("user_start: Saying hello\n"); - ret = fprintf(stream, "Hello, World!!\n"); - if (ret < 0) + if (count < 8) { - message("user_start: ERROR: fprintf failed: %d\n", errno); - fclose(stream); - return 3; + 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; } - ret = fflush(stream); - if (ret < 0) + if (nbytes < 0) { - message("user_start: ERROR: fflush failed: %d\n", errno); - fclose(stream); + message("user_start: ERROR: write failed: %d\n", errno); + close(infd); + close(outfd); return 4; } + /* Poll for incoming messages */ + message("user_start: Waiting\n"); - sleep(5); + for (i = 0; i < 5; i++) + { + 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); + close(outfd); + return 6; + } + } + else + { + message("user_start: Received %d bytes:\n", nbytes); + if (nbytes > 0) + { + message("user_start: "); + (void)fwrite(g_iobuffer, 1, nbytes, stdout); + } + } + sleep(1); + } } /* Won't get here, but if we did this what we would have to do */ - fclose(stream); + close(infd); + close(outfd); return 0; } |