You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
297 lines
12 KiB
297 lines
12 KiB
/**************************************************************************** |
|
* examples/usbserial/host.c |
|
* |
|
* Copyright (C) 2008 Gregory Nutt. All rights reserved. |
|
* Author: Gregory Nutt <gnutt@nuttx.org> |
|
* |
|
* 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 |
|
|
|
#ifdef CONFIG_CDCACM |
|
# define DEFAULT_TTYDEV "/dev/ttyACM0" |
|
#else |
|
# define DEFAULT_TTYDEV "/dev/ttyUSB0" |
|
#endif |
|
#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; |
|
} |
|
|
|
|