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author | patacongo <patacongo@7fd9a85b-ad96-42d3-883c-3090e2eb8679> | 2011-12-19 19:24:09 +0000 |
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committer | patacongo <patacongo@7fd9a85b-ad96-42d3-883c-3090e2eb8679> | 2011-12-19 19:24:09 +0000 |
commit | add995c32e86f9de8fa8fc05172435332c25a895 (patch) | |
tree | 0191fde92a5c4dcd55a24b2aa760fa4c88713242 /apps/examples/usbserial/host.c | |
download | px4-firmware-add995c32e86f9de8fa8fc05172435332c25a895.tar.gz px4-firmware-add995c32e86f9de8fa8fc05172435332c25a895.tar.bz2 px4-firmware-add995c32e86f9de8fa8fc05172435332c25a895.zip |
Completes coding of the PWM module
git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@4200 7fd9a85b-ad96-42d3-883c-3090e2eb8679
Diffstat (limited to 'apps/examples/usbserial/host.c')
-rw-r--r-- | apps/examples/usbserial/host.c | 293 |
1 files changed, 293 insertions, 0 deletions
diff --git a/apps/examples/usbserial/host.c b/apps/examples/usbserial/host.c new file mode 100644 index 000000000..751b7530c --- /dev/null +++ b/apps/examples/usbserial/host.c @@ -0,0 +1,293 @@ +/**************************************************************************** + * 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 <termios.h> +#include <fcntl.h> +#include <errno.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_INONLY +# define COUNTER_NEEDED 1 +# endif +#endif + +#define DEFAULT_TTYDEV "/dev/ttyUSB0" +#define BUFFER_SIZE 1024 + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +static const char *g_ttydev = DEFAULT_TTYDEV; + +#ifndef CONFIG_EXAMPLES_USBSERIAL_ONLYBIG +static const char g_shortmsg[] = "Sure... You betcha!!\n"; +#endif + +#ifndef CONFIG_EXAMPLES_USBSERIAL_ONLYSMALL +static const char g_longmsg[] = + "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"; +#endif + +#ifndef CONFIG_EXAMPLES_USBSERIAL_OUTONLY +static char g_iobuffer[BUFFER_SIZE]; +#endif + +/**************************************************************************** + * 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) +{ + struct termios tty; +#ifndef CONFIG_EXAMPLES_USBSERIAL_OUTONLY + ssize_t nbytes; +#endif +#ifdef COUNTER_NEEDED + int count = 0; +#endif + int fd; + int ret; + + /* 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"); + + /* Configure the serial port in raw mode (at least turn off echo) */ + + ret = tcgetattr(fd, &tty); + if (ret < 0) + { + printf("main: ERROR: Failed to get termios for %s: %s\n", g_ttydev, strerror(errno)); + close(fd); + return 1; + } + + tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON); + tty.c_oflag &= ~OPOST; + tty.c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN); + tty.c_cflag &= ~(CSIZE|PARENB); + tty.c_cflag |= CS8; + + ret = tcsetattr(fd, TCSANOW, &tty); + if (ret < 0) + { + printf("main: ERROR: Failed to set termios for %s: %s\n", g_ttydev, strerror(errno)); + close(fd); + return 1; + } + + /* Wait for and/or send messages -- forever */ + + for (;;) + { + /* Test IN messages (device-to-host) */ + +#ifndef CONFIG_EXAMPLES_USBSERIAL_OUTONLY + printf("main: Reading from the serial driver\n"); + printf("main: ... (Control-C to terminate) ...\n"); + nbytes = read(fd, g_iobuffer, BUFFER_SIZE-1); + if (nbytes < 0) + { + printf("main: ERROR: Failed to read from %s: %s\n", g_ttydev, strerror(errno)); + close(fd); + return 2; + } + else if (nbytes == 0) + { + printf("main: End-of-file encountered\n"); + break; + } + + g_iobuffer[nbytes] = '\0'; + printf("main: Received %d bytes:\n", nbytes); + printf(" \"%s\"\n", g_iobuffer); +#else + printf("main: Waiting...\n"); + sleep(5); +#endif /* CONFIG_EXAMPLES_USBSERIAL_OUTONLY */ + + /* Test OUT messages (host-to-device) */ + +#ifndef CONFIG_EXAMPLES_USBSERIAL_INONLY +#if !defined(CONFIG_EXAMPLES_USBSERIAL_ONLYSMALL) && !defined(CONFIG_EXAMPLES_USBSERIAL_ONLYBIG) + count++; + if (count < 5) + { + printf("main: Sending %d bytes..\n", sizeof(g_shortmsg)); + nbytes = write(fd, g_shortmsg, sizeof(g_shortmsg)); + } + else + { + printf("main: Sending %d bytes..\n", sizeof(g_longmsg)); + nbytes = write(fd, g_longmsg, sizeof(g_longmsg)); + count = 0; + } +#elif !defined(CONFIG_EXAMPLES_USBSERIAL_ONLYSMALL) + printf("main: Sending %d bytes..\n", sizeof(g_longmsg)); + nbytes = write(fd, g_longmsg, sizeof(g_longmsg)); +#else /* !defined(CONFIG_EXAMPLES_USBSERIAL_ONLYBIG) */ + printf("main: Sending %d bytes..\n", sizeof(g_shortmsg)); + nbytes = write(fd, g_shortmsg, sizeof(g_shortmsg)); +#endif + + /* Test if write was successful */ + + 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); +#endif /* CONFIG_EXAMPLES_USBSERIAL_INONLY */ + } + + close(fd); + return 0; +} + |