--- /dev/null
+ GNU GENERAL PUBLIC LICENSE
+ Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.
+ 59 Temple Place, Suite 330, Boston, MA 02111 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+ Preamble
+
+ The licenses for most software are designed to take away your
+freedom to share and change it. By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users. This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it. (Some other Free Software Foundation software is covered by
+the GNU Library General Public License instead.) You can apply it to
+your programs, too.
+
+ When we speak of free software, we are referring to freedom, not
+price. Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+ To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+ For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have. You must make sure that they, too, receive or can get the
+source code. And you must show them these terms so they know their
+rights.
+
+ We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+ Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software. If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
+that any problems introduced by others will not reflect on the original
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+
+ Finally, any free program is threatened constantly by software
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+program proprietary. To prevent this, we have made it clear that any
+patent must be licensed for everyone's free use or not licensed at all.
+
+ The precise terms and conditions for copying, distribution and
+modification follow.
+\f
+ GNU GENERAL PUBLIC LICENSE
+ TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+ 0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License. The "Program", below,
+refers to any such program or work, and a "work based on the Program"
+means either the Program or any derivative work under copyright law:
+that is to say, a work containing the Program or a portion of it,
+either verbatim or with modifications and/or translated into another
+language. (Hereinafter, translation is included without limitation in
+the term "modification".) Each licensee is addressed as "you".
+
+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope. The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
+
+ 1. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
+conspicuously and appropriately publish on each copy an appropriate
+copyright notice and disclaimer of warranty; keep intact all the
+notices that refer to this License and to the absence of any warranty;
+and give any other recipients of the Program a copy of this License
+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a fee.
+
+ 2. You may modify your copy or copies of the Program or any portion
+of it, thus forming a work based on the Program, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+ a) You must cause the modified files to carry prominent notices
+ stating that you changed the files and the date of any change.
+
+ b) You must cause any work that you distribute or publish, that in
+ whole or in part contains or is derived from the Program or any
+ part thereof, to be licensed as a whole at no charge to all third
+ parties under the terms of this License.
+
+ c) If the modified program normally reads commands interactively
+ when run, you must cause it, when started running for such
+ interactive use in the most ordinary way, to print or display an
+ announcement including an appropriate copyright notice and a
+ notice that there is no warranty (or else, saying that you provide
+ a warranty) and that users may redistribute the program under
+ these conditions, and telling the user how to view a copy of this
+ License. (Exception: if the Program itself is interactive but
+ does not normally print such an announcement, your work based on
+ the Program is not required to print an announcement.)
+\f
+These requirements apply to the modified work as a whole. If
+identifiable sections of that work are not derived from the Program,
+and can be reasonably considered independent and separate works in
+themselves, then this License, and its terms, do not apply to those
+sections when you distribute them as separate works. But when you
+distribute the same sections as part of a whole which is a work based
+on the Program, the distribution of the whole must be on the terms of
+this License, whose permissions for other licensees extend to the
+entire whole, and thus to each and every part regardless of who wrote it.
+
+Thus, it is not the intent of this section to claim rights or contest
+your rights to work written entirely by you; rather, the intent is to
+exercise the right to control the distribution of derivative or
+collective works based on the Program.
+
+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of
+a storage or distribution medium does not bring the other work under
+the scope of this License.
+
+ 3. You may copy and distribute the Program (or a work based on it,
+under Section 2) in object code or executable form under the terms of
+Sections 1 and 2 above provided that you also do one of the following:
+
+ a) Accompany it with the complete corresponding machine-readable
+ source code, which must be distributed under the terms of Sections
+ 1 and 2 above on a medium customarily used for software interchange; or,
+
+ b) Accompany it with a written offer, valid for at least three
+ years, to give any third party, for a charge no more than your
+ cost of physically performing source distribution, a complete
+ machine-readable copy of the corresponding source code, to be
+ distributed under the terms of Sections 1 and 2 above on a medium
+ customarily used for software interchange; or,
+
+ c) Accompany it with the information you received as to the offer
+ to distribute corresponding source code. (This alternative is
+ allowed only for noncommercial distribution and only if you
+ received the program in object code or executable form with such
+ an offer, in accord with Subsection b above.)
+
+The source code for a work means the preferred form of the work for
+making modifications to it. For an executable work, complete source
+code means all the source code for all modules it contains, plus any
+associated interface definition files, plus the scripts used to
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+anything that is normally distributed (in either source or binary
+form) with the major components (compiler, kernel, and so on) of the
+operating system on which the executable runs, unless that component
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+
+If distribution of executable or object code is made by offering
+access to copy from a designated place, then offering equivalent
+access to copy the source code from the same place counts as
+distribution of the source code, even though third parties are not
+compelled to copy the source along with the object code.
+\f
+ 4. You may not copy, modify, sublicense, or distribute the Program
+except as expressly provided under this License. Any attempt
+otherwise to copy, modify, sublicense or distribute the Program is
+void, and will automatically terminate your rights under this License.
+However, parties who have received copies, or rights, from you under
+this License will not have their licenses terminated so long as such
+parties remain in full compliance.
+
+ 5. You are not required to accept this License, since you have not
+signed it. However, nothing else grants you permission to modify or
+distribute the Program or its derivative works. These actions are
+prohibited by law if you do not accept this License. Therefore, by
+modifying or distributing the Program (or any work based on the
+Program), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Program or works based on it.
+
+ 6. Each time you redistribute the Program (or any work based on the
+Program), the recipient automatically receives a license from the
+original licensor to copy, distribute or modify the Program subject to
+these terms and conditions. You may not impose any further
+restrictions on the recipients' exercise of the rights granted herein.
+You are not responsible for enforcing compliance by third parties to
+this License.
+
+ 7. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License. If you cannot
+distribute so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you
+may not distribute the Program at all. For example, if a patent
+license would not permit royalty-free redistribution of the Program by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
+apply and the section as a whole is intended to apply in other
+circumstances.
+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system, which is
+implemented by public license practices. Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+\f
+ 8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded. In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+ 9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time. Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number. If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation. If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+ 10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
+to ask for permission. For software which is copyrighted by the Free
+Software Foundation, write to the Free Software Foundation; we sometimes
+make exceptions for this. Our decision will be guided by the two goals
+of preserving the free status of all derivatives of our free software and
+of promoting the sharing and reuse of software generally.
+
+ NO WARRANTY
+
+ 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+ 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+ END OF TERMS AND CONDITIONS
+\f
+ Appendix: How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+ <one line to give the program's name and a brief idea of what it does.>
+ Copyright (C) 19yy <name of author>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111 USA
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+ Gnomovision version 69, Copyright (C) 19yy name of author
+ Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+ This is free software, and you are welcome to redistribute it
+ under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License. Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary. Here is a sample; alter the names:
+
+ Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+ `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+ <signature of Ty Coon>, 1 April 1989
+ Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs. If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library. If this is what you want to do, use the GNU Library General
+Public License instead of this License.
--- /dev/null
+/* Test application for Omron card reader
+ * Copyright (C) 2009 Nils Faerber <nils.faerber@kernelconcepts.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/select.h>
+
+#include "uart.h"
+
+#define DLE 0x10
+#define STX 0x02
+#define ETX 0x03
+#define ENQ 0x05
+#define ACK 0x06
+#define NAK 0x15
+#define EOT 0x04
+
+
+void send_command(int fd, char *cmd, int len)
+{
+unsigned char bcc;
+int pos;
+char *sbuf = NULL;
+unsigned int sbpos = 0;
+
+ sbuf = (char *)malloc(len + 5);
+ if (sbuf == NULL) {
+ perror("malloc");
+ return;
+ }
+
+ sbuf[sbpos++] = DLE;
+ sbuf[sbpos++] = STX;
+ bcc = 0;
+ pos = 0;
+ while (pos < len) {
+ sbuf[sbpos++] = cmd[pos];
+ bcc ^= cmd[pos];
+ if (cmd[pos] == DLE)
+ sbuf[sbpos++] = cmd[pos];
+ pos++;
+ }
+ sbuf[sbpos++] = DLE;
+ sbuf[sbpos++] = ETX;
+ bcc ^= ETX;
+ sbuf[sbpos++] = bcc;
+
+ write_uart(sbuf, sbpos);
+ free(sbuf);
+}
+
+int process_user_cmd(char *rxbuf, int len, int ufd)
+{
+int in_cmd = 0;
+
+ if (rxbuf[0] == 'i') {
+ fprintf(stderr, "Init permit request... ");
+ send_command(ufd, "C:2", 3);
+ in_cmd = 1;
+ }
+ if (rxbuf[0] == 'r') {
+ fprintf(stderr, "RESET request... ");
+ send_command(ufd, "C00", 3);
+ in_cmd = 1;
+ }
+ if (rxbuf[0] == 'e') {
+ fprintf(stderr, "Eject request... ");
+ send_command(ufd, "C30", 3);
+ in_cmd = 1;
+ }
+ if (rxbuf[0] == 's') {
+ fprintf(stderr, "Status request... ");
+ send_command(ufd, "C10", 3);
+ in_cmd = 1;
+ }
+ if (rxbuf[0] == 'S') {
+ fprintf(stderr, "Status request... ");
+ send_command(ufd, "C11", 3);
+ in_cmd = 1;
+ }
+ if (rxbuf[0] == '1') {
+ fprintf(stderr, "Status request... ");
+ send_command(ufd, "C61", 3);
+ in_cmd = 1;
+ }
+ if (rxbuf[0] == '2') {
+ fprintf(stderr, "Status request... ");
+ send_command(ufd, "C62", 3);
+ in_cmd = 1;
+ }
+ if (rxbuf[0] == '3') {
+ fprintf(stderr, "Status request... ");
+ send_command(ufd, "C63", 3);
+ in_cmd = 1;
+ }
+
+ if (rxbuf[0] == 'q') {
+ fprintf(stderr, "Exiting...\n");
+ in_cmd = -1;
+ }
+
+ return in_cmd;
+}
+
+void process_read_packet(char *rxbuf, int rxpos)
+{
+int bpos;
+
+ bpos = 2; // index into read buffer
+ if (rxbuf[bpos] == 'P') {
+ fprintf(stderr, "positive, ");
+ bpos++;
+ fprintf(stderr, "cmd was '%c%c', ", rxbuf[bpos], rxbuf[bpos+1]);
+ bpos+=2;
+ if (rxbuf[bpos]=='0' && rxbuf[bpos+1]=='0') {
+ fprintf(stderr, "no card present, ");
+ } else if (rxbuf[bpos]=='0' && rxbuf[bpos+1]=='1') {
+ fprintf(stderr, "card at takeout, ");
+ } else if (rxbuf[bpos]=='0' && rxbuf[bpos+1]=='2') {
+ fprintf(stderr, "card present, ");
+ } else
+ fprintf(stderr, "stat is '%c%c', ", rxbuf[bpos], rxbuf[bpos+1]);
+ } else if (rxbuf[bpos] == 'N') {
+ fprintf(stderr, "negative, ");
+ bpos++;
+ fprintf(stderr, "cmd was '%c%c', ", rxbuf[bpos], rxbuf[bpos+1]);
+ bpos+=2;
+ if (rxbuf[bpos]=='0' && rxbuf[bpos+1]=='0') {
+ fprintf(stderr, "undefined command, ");
+ } else if (rxbuf[bpos]=='0' && rxbuf[bpos+1]=='1') {
+ fprintf(stderr, "command sequence error, ");
+ } else if (rxbuf[bpos]=='0' && rxbuf[bpos+1]=='2') {
+ fprintf(stderr, "command data error, ");
+ } else if (rxbuf[bpos]=='0' && rxbuf[bpos+1]=='3') {
+ fprintf(stderr, "write track setting error, ");
+ } else if (rxbuf[bpos]=='4' && rxbuf[bpos+1]=='0') {
+ fprintf(stderr, "SS read error, ");
+ } else if (rxbuf[bpos]=='4' && rxbuf[bpos+1]=='1') {
+ fprintf(stderr, "ES read error, ");
+ } else if (rxbuf[bpos]=='4' && rxbuf[bpos+1]=='2') {
+ fprintf(stderr, "VRC read error, ");
+ } else if (rxbuf[bpos]=='4' && rxbuf[bpos+1]=='3') {
+ fprintf(stderr, "LRC read error, ");
+ } else if (rxbuf[bpos]=='4' && rxbuf[bpos+1]=='4') {
+ fprintf(stderr, "No encode read error, ");
+ } else if (rxbuf[bpos]=='4' && rxbuf[bpos+1]=='5') {
+ fprintf(stderr, "No data read error, ");
+ } else if (rxbuf[bpos]=='4' && rxbuf[bpos+1]=='6') {
+ fprintf(stderr, "Jitter read error, ");
+ } else
+ fprintf(stderr, "stat is '%c%c', ", rxbuf[bpos], rxbuf[bpos+1]);
+ }
+ bpos+=2;
+ if (bpos < rxpos-3)
+ fprintf(stderr, "\ndata: ");
+ while (bpos < rxpos-3) {
+ unsigned char c = rxbuf[bpos++];
+ if (c > 31 || c < 128)
+ fprintf(stderr, "%c", c);
+ else
+ fprintf(stderr, "0x%02x ", c);
+
+ }
+ fprintf(stderr, "\n");
+}
+
+int main(int argc, char **argv)
+{
+char rxbuf[256];
+int ufd, rxlen=0, rxpos=0, ret;
+int in_cmd = 0;
+fd_set rfds;
+struct timeval tval;
+
+ if (open_uart("/dev/ttyUSB0", B9600) != 0)
+ return -1;
+ ufd = uart_get_fd();
+ // fprintf(stderr, "UART fd = %d\n", ufd);
+ FD_ZERO(&rfds);
+ FD_SET(ufd, &rfds);
+ FD_SET(0, &rfds);
+ tval.tv_sec = 0;
+ tval.tv_usec = 5000000;
+
+ fprintf(stderr, "OMRON MVFW card reader terminal\nEnter 'h' for help\n");
+ while (1) {
+ ret = select((ufd+1), &rfds, NULL, NULL, &tval);
+ if (ret == 0) {
+ FD_ZERO(&rfds);
+ FD_SET(ufd, &rfds);
+ FD_SET(0, &rfds);
+ tval.tv_sec = 0;
+ tval.tv_usec = 5000000;
+ if (rxpos > 0)
+ fprintf(stderr, "Select tmo but buffer not empty!\n");
+ memset(rxbuf, 0, 256);
+ rxpos = 0; // invalidate buffer
+ } else if (ret > 0) {
+ if (FD_ISSET(ufd, &rfds)) {
+ // fprintf(stderr, "**** select something to read ****\n");
+ rxlen = uart_read(rxbuf+rxpos, 255-rxpos);
+ rxpos += rxlen;
+ // fprintf(stderr, " read %d bytes\n", rxlen);
+ if (rxpos == 2 && rxbuf[0] == DLE && rxbuf[1] == ACK && in_cmd == 1) {
+ fprintf(stderr, "got ACK requesting execute \n");
+ put_uart(DLE);
+ put_uart(ENQ);
+ in_cmd = 0;
+ memset(rxbuf, 0, 256);
+ rxpos = 0;
+ } else if (rxpos > 2 && rxbuf[rxpos-3]==DLE && rxbuf[rxpos-2]==ETX) {
+ // data is between DLE-STX and DLE-ETX-BCC
+ process_read_packet(rxbuf, rxpos);
+ memset(rxbuf, 0, 256);
+ rxpos = 0;
+ } else
+ fprintf(stderr, "buf not complete yet\n");
+ }
+ if (FD_ISSET(0, &rfds)) {
+ // fprintf(stderr, "**** keypress\n");
+ ret = read(0, rxbuf, 255);
+ if (ret > 0) {
+ in_cmd = process_user_cmd(rxbuf, ret, ufd);
+ if (in_cmd == -1) {
+ close(ufd);
+ exit(0);
+ }
+ }
+ }
+ FD_ZERO(&rfds);
+ FD_SET(ufd, &rfds);
+ FD_SET(0, &rfds);
+
+ fprintf(stderr, "\n> ");
+ } else {
+ fprintf(stderr, "select error\n");
+ break;
+ }
+ }
+
+ close_uart();
+
+return 0;
+}