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////////////////////////////////////////////////////////////////////////////////
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//
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// Filename: dumpuart.cpp
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//
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// Project: OpenArty, an entirely open SoC based upon the Arty platform
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//
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// Purpose: To produce any and all data from the UART port onto an output
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// pipe and/or an output file. This replaces the minicom
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// interface. This is necessary because 1) minicom can take a while to
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// set up, 2) the default interface is at 115200 Baud (not minicom's
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// default), 3) this produces an unfiltered/unbuffered terminal output,
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// and 4) it also guarantees that output goes to a file (when requested).
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//
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// This program was originally a part of the S6SoC suite of host programs. It
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// has since been modified for the OpenArty project--mostly by just changing the
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// data speed from 9.6kB to 115.2kB.
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//
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//
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// Creator: Dan Gisselquist, Ph.D.
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// Gisselquist Technology, LLC
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//
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////////////////////////////////////////////////////////////////////////////////
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//
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// Copyright (C) 2015-2017, Gisselquist Technology, LLC
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//
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// This program is free software (firmware): you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as published
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// by the Free Software Foundation, either version 3 of the License, or (at
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// your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but WITHOUT
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// ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY or
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// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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// for more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with this program. (It's in the $(ROOT)/doc directory. Run make with no
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// target there if the PDF file isn't present.) If not, see
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// <http://www.gnu.org/licenses/> for a copy.
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//
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// License: GPL, v3, as defined and found on www.gnu.org,
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// http://www.gnu.org/licenses/gpl.html
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//
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//
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////////////////////////////////////////////////////////////////////////////////
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//
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//
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//
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <strings.h>
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#include <ctype.h>
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#include <string.h>
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#include <signal.h>
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#include <assert.h>
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#include <termios.h>
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int main(int argc, char **argv) {
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const char *dev = argv[1];
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const char *fname = (argc>=3)?argv[2]:NULL;
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int ttyfd = -1, dumpfd = -1;
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ttyfd = open(dev, O_RDONLY);
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if (fname)
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dumpfd = open(fname, O_CREAT|O_TRUNC|O_WRONLY, 0644);
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// Set the baud rate ...
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{
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struct termios tb;
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tcgetattr(ttyfd, &tb);
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// Set to raw mode
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cfmakeraw(&tb);
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// Non-canonical mode (no line editing ...)
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tb.c_lflag &= (~(ICANON));
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// Set no parity
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tb.c_cflag &= (~(PARENB));
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// Set 8 data bits
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tb.c_cflag &= (~(CSIZE));
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tb.c_cflag |= CS8;
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// Turn on hardware flow control
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tb.c_cflag |= CRTSCTS;
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// One stop bit
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tb.c_cflag &= (~(CSTOPB));
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// 115200 Baud
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cfsetspeed(&tb, B115200);
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// Block until at least one byte is available
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tb.c_cc[VMIN] = 1;
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tb.c_cc[VTIME] = 0;
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// Commit the changes
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tcsetattr(ttyfd, TCSANOW, &tb);
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}
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/*
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if (isatty(STDOUT_FILENO)) {
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struct termios tb;
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tcgetattr(STDOUT_FILENO, &tb);
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}
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*/
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char buf[64];
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int nr;
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while((nr=read(ttyfd, buf, sizeof(buf)))>0) {
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if (dumpfd >= 0)
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write(dumpfd, buf, nr);
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write(STDOUT_FILENO, buf, nr);
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}
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close(ttyfd);
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if (dumpfd >= 0)
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close(dumpfd);
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}
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