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authorHaoran S. Diao <0@hairydiode.xyz>2019-04-13 13:03:52 -0400
committerHaoran S. Diao <0@hairydiode.xyz>2019-04-13 13:03:52 -0400
commit479abdfc5ffbaafa4b00f46cf589309dc0ec071b (patch)
tree08f6b251ad8a47a4aa7e9b4fc0615a8d36aafd7a
parent511faa6d6d7cf46cba1e7e29ac0f0f102d87a812 (diff)
added RS-232 Library, also covered by the GPL
-rw-r--r--RS-232/LICENSE677
-rwxr-xr-xRS-232/Makefile42
-rw-r--r--RS-232/demo_rx.c72
-rw-r--r--RS-232/demo_tx.c66
-rw-r--r--RS-232/doc.txt230
-rw-r--r--RS-232/gpl.txt677
-rw-r--r--RS-232/howto_compile.txt28
-rw-r--r--RS-232/rs232.c820
-rw-r--r--RS-232/rs232.h87
9 files changed, 2699 insertions, 0 deletions
diff --git a/RS-232/LICENSE b/RS-232/LICENSE
new file mode 100644
index 0000000..e43d6cf
--- /dev/null
+++ b/RS-232/LICENSE
@@ -0,0 +1,677 @@
+
+
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+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.
+
+ 16. Limitation of Liability.
+
+ IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+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.
+
+ 17. Interpretation of Sections 15 and 16.
+
+ If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+ END OF TERMS AND CONDITIONS
+
+ 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
+state 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) <year> <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 3 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, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+ If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+ <program> Copyright (C) <year> <name of author>
+ This program 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, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+ You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+ The GNU 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 Lesser General
+Public License instead of this License. But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
+
diff --git a/RS-232/Makefile b/RS-232/Makefile
new file mode 100755
index 0000000..6af5201
--- /dev/null
+++ b/RS-232/Makefile
@@ -0,0 +1,42 @@
+#
+#
+# Author: Teunis van Beelen
+#
+# email: teuniz@gmail.com
+#
+#
+
+CC = gcc
+CFLAGS = -Wall -Wextra -Wshadow -Wformat-nonliteral -Wformat-security -Wtype-limits -o2
+
+objects = rs232.o
+
+all: test_rx test_tx
+
+test_rx : $(objects) demo_rx.o
+ $(CC) $(objects) demo_rx.o -o test_rx
+
+test_tx : $(objects) demo_tx.o
+ $(CC) $(objects) demo_tx.o -o test_tx
+
+demo_rx.o : demo_rx.c rs232.h
+ $(CC) $(CFLAGS) -c demo_rx.c -o demo_rx.o
+
+demo_tx.o : demo_tx.c rs232.h
+ $(CC) $(CFLAGS) -c demo_tx.c -o demo_tx.o
+
+rs232.o : rs232.h rs232.c
+ $(CC) $(CFLAGS) -c rs232.c -o rs232.o
+
+clean :
+ $(RM) test_rx test_tx $(objects) demo_rx.o demo_tx.o rs232.o
+
+#
+#
+#
+#
+
+
+
+
+
diff --git a/RS-232/demo_rx.c b/RS-232/demo_rx.c
new file mode 100644
index 0000000..94bd8c3
--- /dev/null
+++ b/RS-232/demo_rx.c
@@ -0,0 +1,72 @@
+
+/**************************************************
+
+file: demo_rx.c
+purpose: simple demo that receives characters from
+the serial port and print them on the screen,
+exit the program by pressing Ctrl-C
+
+compile with the command: gcc demo_rx.c rs232.c -Wall -Wextra -o2 -o test_rx
+
+**************************************************/
+
+#include <stdlib.h>
+#include <stdio.h>
+
+#ifdef _WIN32
+#include <Windows.h>
+#else
+#include <unistd.h>
+#endif
+
+#include "rs232.h"
+
+
+
+int main()
+{
+ int i, n,
+ cport_nr=0, /* /dev/ttyS0 (COM1 on windows) */
+ bdrate=9600; /* 9600 baud */
+
+ unsigned char buf[4096];
+
+ char mode[]={'8','N','1',0};
+
+
+ if(RS232_OpenComport(cport_nr, bdrate, mode))
+ {
+ printf("Can not open comport\n");
+
+ return(0);
+ }
+
+ while(1)
+ {
+ n = RS232_PollComport(cport_nr, buf, 4095);
+
+ if(n > 0)
+ {
+ buf[n] = 0; /* always put a "null" at the end of a string! */
+
+ for(i=0; i < n; i++)
+ {
+ if(buf[i] < 32) /* replace unreadable control-codes by dots */
+ {
+ buf[i] = '.';
+ }
+ }
+
+ printf("received %i bytes: %s\n", n, (char *)buf);
+ }
+
+#ifdef _WIN32
+ Sleep(100);
+#else
+ usleep(100000); /* sleep for 100 milliSeconds */
+#endif
+ }
+
+ return(0);
+}
+
diff --git a/RS-232/demo_tx.c b/RS-232/demo_tx.c
new file mode 100644
index 0000000..bd43fb4
--- /dev/null
+++ b/RS-232/demo_tx.c
@@ -0,0 +1,66 @@
+
+/**************************************************
+
+file: demo_tx.c
+purpose: simple demo that transmits characters to
+the serial port and print them on the screen,
+exit the program by pressing Ctrl-C
+
+compile with the command: gcc demo_tx.c rs232.c -Wall -Wextra -o2 -o test_tx
+
+**************************************************/
+
+#include <stdlib.h>
+#include <stdio.h>
+
+#ifdef _WIN32
+#include <Windows.h>
+#else
+#include <unistd.h>
+#endif
+
+#include "rs232.h"
+
+
+
+int main()
+{
+ int i=0,
+ cport_nr=0, /* /dev/ttyS0 (COM1 on windows) */
+ bdrate=9600; /* 9600 baud */
+
+ char mode[]={'8','N','1',0},
+ str[2][512];
+
+
+ strcpy(str[0], "The quick brown fox jumped over the lazy grey dog.\n");
+
+ strcpy(str[1], "Happy serial programming!\n");
+
+ if(RS232_OpenComport(cport_nr, bdrate, mode))
+ {
+ printf("Can not open comport\n");
+
+ return(0);
+ }
+
+ while(1)
+ {
+ RS232_cputs(cport_nr, str[i]);
+
+ printf("sent: %s\n", str[i]);
+
+#ifdef _WIN32
+ Sleep(1000);
+#else
+ usleep(1000000); /* sleep for 1 Second */
+#endif
+
+ i++;
+
+ i %= 2;
+ }
+
+ return(0);
+}
+
diff --git a/RS-232/doc.txt b/RS-232/doc.txt
new file mode 100644
index 0000000..863ad22
--- /dev/null
+++ b/RS-232/doc.txt
@@ -0,0 +1,230 @@
+
+Library: RS-232
+Author: Teunis van Beelen
+Url: http://www.teuniz.net/RS-232/
+E-mail: teuniz@gmail.com
+License: GPLv3
+
+Last revision: November 22, 2017
+
+
+
+int RS232_OpenComport(int comport_number, int baudrate, const char * mode)
+
+ Opens the comport, comportnumber starts with 0 (see the list of numbers).
+ Baudrate is expressed in baud per second i.e 115200 (see the list of possible baudrates).
+ Mode is a string in the form of "8N1", "7E2", etc.
+ 8N1 means eight databits, no parity, one stopbit. If in doubt, use 8N1 (see the list of possible modes).
+ Returns 1 in case of an error.
+ In case the comport is already opened (by another process),
+ it will not open the port but raise an error instead.
+
+int RS232_PollComport(int comport_number, unsigned char *buf, int size)
+
+ Gets characters from the serial port (if any). Buf is a pointer to a buffer
+ and size the size of the buffer in bytes.
+ Returns the amount of received characters into the buffer. This can be less than size or zero!
+ It does not block or wait, it returns immediately, no matter if any characters have been received or not.
+ After succesfully opening the COM-port, connect this function to a timer.
+ The timer should have an interval of approx. 20 to 100 milliSeconds.
+ Do not forget to stop the timer before closing the COM-port.
+ Allways check the return value! The return value tells you how many bytes
+ are actually received and present in your buffer!
+
+int RS232_SendByte(int comport_number, unsigned char byte)
+
+ Sends a byte via the serial port. Returns 1 in case of an error.
+
+int RS232_SendBuf(int comport_number, unsigned char *buf, int size)
+
+ Sends multiple bytes via the serial port. Buf is a pointer to a buffer
+ and size the size of the buffer in bytes.
+ Returns -1 in case of an error, otherwise it returns the amount of bytes sent.
+ This function blocks (it returns after all the bytes have been processed).
+
+void RS232_CloseComport(int comport_number)
+
+ Closes the serial port.
+
+void RS232_cputs(int comport_number, const char *text)
+
+ Sends a string via the serial port. String must be null-terminated.
+
+int RS232_GetPortnr(const char *devname)
+
+ Returns the comport number based on the device name e.g. "ttyS0" or "COM1".
+ (Doesn't mean the device actually exists!)
+ Returns -1 when not found.
+
+
+The following functions are normally not needed but can be used to set or check the status of the control-lines:
+================================================================================================================
+
+void RS232_enableDTR(int comport_number)
+
+ Sets the DTR line high (active state).
+
+void RS232_disableDTR(int comport_number)
+
+ Sets the DTR line low (non active state).
+
+void RS232_enableRTS(int comport_number)
+
+ Sets the RTS line high (active state).
+
+void RS232_disableRTS(int comport_number)
+
+ Sets the RTS line low (non active state).
+
+int RS232_IsDSREnabled(int comport_number)
+
+ Checks the status of the DSR-pin. Returns 1 when the the DSR line is high (active state), otherwise 0.
+
+int RS232_IsCTSEnabled(int comport_number)
+
+ Checks the status of the CTS-pin. Returns 1 when the the CTS line is high (active state), otherwise 0.
+
+int RS232_IsDCDEnabled(int comport_number)
+
+ Checks the status of the DCD-pin. Returns 1 when the the DCD line is high (active state), otherwise 0.
+
+
+The following functions are normally not needed but can be used to empty the rx/tx buffers:
+===========================================================================================
+
+("discards data written to the serial port but not transmitted, or data received but not read")
+
+void RS232_flushRX(int comport_number)
+
+ Flushes data received but not read.
+
+void RS232_flushTX(int comport_number)
+
+ Flushes data written but not transmitted.
+
+void RS232_flushRXTX(int comport_number)
+
+ Flushes both data received but not read, and data written but not transmitted.
+
+
+
+Notes:
+
+You don't need to call RS232_PollComport() when you only want to send characters.
+Sending and receiving do not influence eachother.
+
+The os (kernel) has an internal buffer of 4096 bytes (for traditional onboard serial ports).
+USB/Serial-converter drivers use much bigger buffers (multiples of 4096).
+If this buffer is full and a new character arrives on the serial port,
+the oldest character in the buffer will be overwritten and thus will be lost.
+
+After a successfull call to RS232_OpenComport(), the os will start to buffer incoming characters.
+
+tip: To get access to the serial port on Linux, you need to be a member of the group "dialout".
+
+Note: Traditional (on-board) UART's usually have a speed limit of max. 115200 baud.
+ Special cards and USB to Serial converters can usually be set to higher baudrates.
+
+
+List of comport numbers, possible baudrates and modes:
+
+ Linux windows
+0 ttyS0 COM1
+1 ttyS1 COM2
+2 ttyS2 COM3
+3 ttyS3 COM4
+4 ttyS4 COM5
+5 ttyS5 COM6
+6 ttyS6 COM7
+7 ttyS7 COM8
+8 ttyS8 COM9
+9 ttyS9 COM10
+10 ttyS10 COM11
+11 ttyS11 COM12
+12 ttyS12 COM13
+13 ttyS13 COM14
+14 ttyS14 COM15
+15 ttyS15 COM16
+16 ttyUSB0 n.a.
+17 ttyUSB1 n.a.
+18 ttyUSB2 n.a.
+19 ttyUSB3 n.a.
+20 ttyUSB4 n.a.
+21 ttyUSB5 n.a.
+22 ttyAMA0 n.a.
+23 ttyAMA1 n.a.
+24 ttyACM0 n.a.
+25 ttyACM1 n.a.
+26 rfcomm0 n.a.
+27 rfcomm1 n.a.
+28 ircomm0 n.a.
+29 ircomm1 n.a.
+ FreeBSD
+30 cuau0 n.a.
+31 cuau1 n.a.
+32 cuau2 n.a.
+33 cuau3 n.a.
+34 cuaU0 n.a.
+35 cuaU1 n.a.
+36 cuaU2 n.a.
+37 cuaU3 n.a.
+
+Linux windows
+50 n.a.
+75 n.a.
+110 110
+134 n.a.
+150 n.a.
+200 n.a.
+300 300
+600 600
+1200 1200
+1800 n.a.
+2400 2400
+4800 4800
+9600 9600
+19200 19200
+38400 38400
+57600 57600
+115200 115200
+230400 128000
+460800 256000
+500000 500000
+576000 n.a.
+921600 n.a.
+1000000 1000000
+1152000 n.a.
+1500000 n.a.
+2000000 n.a.
+2500000 n.a.
+3000000 n.a.
+3500000 n.a.
+4000000 n.a.
+
+Mode
+8N1
+8O1
+8E1
+8N2
+8O2
+8E2
+7N1
+7O1
+7E1
+7N2
+7O2
+7E2
+6N1
+6O1
+6E1
+6N2
+6O2
+6E2
+5N1
+5O1
+5E1
+5N2
+5O2
+5E2
+
+
diff --git a/RS-232/gpl.txt b/RS-232/gpl.txt
new file mode 100644
index 0000000..e43d6cf
--- /dev/null
+++ b/RS-232/gpl.txt
@@ -0,0 +1,677 @@
+
+
+ GNU GENERAL PUBLIC LICENSE
+ Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+ Preamble
+
+ The GNU General Public License is a free, copyleft license for
+software and other kinds of works.
+
+ The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works. By contrast,
+the GNU General Public License is intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users. We, the Free Software Foundation, use the
+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors. 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
+them 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 prevent others from denying you
+these rights or asking you to surrender the rights. Therefore, you have
+certain responsibilities if you distribute copies of the software, or if
+you modify it: responsibilities to respect the freedom of others.
+
+ For example, if you distribute copies of such a program, whether
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+
+ Developers that use the GNU GPL protect your rights with two steps:
+(1) assert copyright on the software, and (2) offer you this License
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+authors' sake, the GPL requires that modified versions be marked as
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+
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+ The precise terms and conditions for copying, distribution and
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+ (at your option) any later version.
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+ This is free software, and you are welcome to redistribute it
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+
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+may consider it more useful to permit linking proprietary applications with
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+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
+
diff --git a/RS-232/howto_compile.txt b/RS-232/howto_compile.txt
new file mode 100644
index 0000000..de152cb
--- /dev/null
+++ b/RS-232/howto_compile.txt
@@ -0,0 +1,28 @@
+
+Compiling the demo's can be done as follows:
+
+gcc demo_rx.c rs232.c -Wall -Wextra -o2 -o test_rx
+
+gcc demo_tx.c rs232.c -Wall -Wextra -o2 -o test_tx
+
+or use the makefile by entering "make"
+
+Run the demo by typing:
+
+./test_rx
+
+or
+
+./test_tx
+
+
+
+To include this library into your project:
+
+Put the two files rs232.h and rs232.c in your project/sourcedirectory.
+
+Write #include "rs232.h" in your sourcefiles that needs access to the library.
+
+Add the file rs232.c to your project settings (in order to get it compiled and linked with your program).
+
+
diff --git a/RS-232/rs232.c b/RS-232/rs232.c
new file mode 100644
index 0000000..31edd53
--- /dev/null
+++ b/RS-232/rs232.c
@@ -0,0 +1,820 @@
+/*
+***************************************************************************
+*
+* Author: Teunis van Beelen
+*
+* Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 Teunis van Beelen
+*
+* Email: teuniz@gmail.com
+*
+***************************************************************************
+*
+* 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 3 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, see <http://www.gnu.org/licenses/>.
+*
+***************************************************************************
+*/
+
+
+/* Last revision: November 22, 2017 */
+
+/* For more info and how to use this library, visit: http://www.teuniz.net/RS-232/ */
+
+
+#include "rs232.h"
+
+
+#if defined(__linux__) || defined(__FreeBSD__) /* Linux & FreeBSD */
+
+#define RS232_PORTNR 38
+
+
+int Cport[RS232_PORTNR],
+ error;
+
+struct termios new_port_settings,
+ old_port_settings[RS232_PORTNR];
+
+char *comports[RS232_PORTNR]={"/dev/ttyS0","/dev/ttyS1","/dev/ttyS2","/dev/ttyS3","/dev/ttyS4","/dev/ttyS5",
+ "/dev/ttyS6","/dev/ttyS7","/dev/ttyS8","/dev/ttyS9","/dev/ttyS10","/dev/ttyS11",
+ "/dev/ttyS12","/dev/ttyS13","/dev/ttyS14","/dev/ttyS15","/dev/ttyUSB0",
+ "/dev/ttyUSB1","/dev/ttyUSB2","/dev/ttyUSB3","/dev/ttyUSB4","/dev/ttyUSB5",
+ "/dev/ttyAMA0","/dev/ttyAMA1","/dev/ttyACM0","/dev/ttyACM1",
+ "/dev/rfcomm0","/dev/rfcomm1","/dev/ircomm0","/dev/ircomm1",
+ "/dev/cuau0","/dev/cuau1","/dev/cuau2","/dev/cuau3",
+ "/dev/cuaU0","/dev/cuaU1","/dev/cuaU2","/dev/cuaU3"};
+
+int RS232_OpenComport(int comport_number, int baudrate, const char *mode)
+{
+ int baudr,
+ status;
+
+ if((comport_number>=RS232_PORTNR)||(comport_number<0))
+ {
+ printf("illegal comport number\n");
+ return(1);
+ }
+
+ switch(baudrate)
+ {
+ case 50 : baudr = B50;
+ break;
+ case 75 : baudr = B75;
+ break;
+ case 110 : baudr = B110;
+ break;
+ case 134 : baudr = B134;
+ break;
+ case 150 : baudr = B150;
+ break;
+ case 200 : baudr = B200;
+ break;
+ case 300 : baudr = B300;
+ break;
+ case 600 : baudr = B600;
+ break;
+ case 1200 : baudr = B1200;
+ break;
+ case 1800 : baudr = B1800;
+ break;
+ case 2400 : baudr = B2400;
+ break;
+ case 4800 : baudr = B4800;
+ break;
+ case 9600 : baudr = B9600;
+ break;
+ case 19200 : baudr = B19200;
+ break;
+ case 38400 : baudr = B38400;
+ break;
+ case 57600 : baudr = B57600;
+ break;
+ case 115200 : baudr = B115200;
+ break;
+ case 230400 : baudr = B230400;
+ break;
+ case 460800 : baudr = B460800;
+ break;
+ case 500000 : baudr = B500000;
+ break;
+ case 576000 : baudr = B576000;
+ break;
+ case 921600 : baudr = B921600;
+ break;
+ case 1000000 : baudr = B1000000;
+ break;
+ case 1152000 : baudr = B1152000;
+ break;
+ case 1500000 : baudr = B1500000;
+ break;
+ case 2000000 : baudr = B2000000;
+ break;
+ case 2500000 : baudr = B2500000;
+ break;
+ case 3000000 : baudr = B3000000;
+ break;
+ case 3500000 : baudr = B3500000;
+ break;
+ case 4000000 : baudr = B4000000;
+ break;
+ default : printf("invalid baudrate\n");
+ return(1);
+ break;
+ }
+
+ int cbits=CS8,
+ cpar=0,
+ ipar=IGNPAR,
+ bstop=0;
+
+ if(strlen(mode) != 3)
+ {
+ printf("invalid mode \"%s\"\n", mode);
+ return(1);
+ }
+
+ switch(mode[0])
+ {
+ case '8': cbits = CS8;
+ break;
+ case '7': cbits = CS7;
+ break;
+ case '6': cbits = CS6;
+ break;
+ case '5': cbits = CS5;
+ break;
+ default : printf("invalid number of data-bits '%c'\n", mode[0]);
+ return(1);
+ break;
+ }
+
+ switch(mode[1])
+ {
+ case 'N':
+ case 'n': cpar = 0;
+ ipar = IGNPAR;
+ break;
+ case 'E':
+ case 'e': cpar = PARENB;
+ ipar = INPCK;
+ break;
+ case 'O':
+ case 'o': cpar = (PARENB | PARODD);
+ ipar = INPCK;
+ break;
+ default : printf("invalid parity '%c'\n", mode[1]);
+ return(1);
+ break;
+ }
+
+ switch(mode[2])
+ {
+ case '1': bstop = 0;
+ break;
+ case '2': bstop = CSTOPB;
+ break;
+ default : printf("invalid number of stop bits '%c'\n", mode[2]);
+ return(1);
+ break;
+ }
+
+/*
+http://pubs.opengroup.org/onlinepubs/7908799/xsh/termios.h.html
+
+http://man7.org/linux/man-pages/man3/termios.3.html
+*/
+
+ Cport[comport_number] = open(comports[comport_number], O_RDWR | O_NOCTTY | O_NDELAY);
+ if(Cport[comport_number]==-1)
+ {
+ perror("unable to open comport ");
+ return(1);
+ }
+
+ /* lock access so that another process can't also use the port */
+ if(flock(Cport[comport_number], LOCK_EX | LOCK_NB) != 0)
+ {
+ close(Cport[comport_number]);
+ perror("Another process has locked the comport.");
+ return(1);
+ }
+
+ error = tcgetattr(Cport[comport_number], old_port_settings + comport_number);
+ if(error==-1)
+ {
+ close(Cport[comport_number]);
+ flock(Cport[comport_number], LOCK_UN); /* free the port so that others can use it. */
+ perror("unable to read portsettings ");
+ return(1);
+ }
+ memset(&new_port_settings, 0, sizeof(new_port_settings)); /* clear the new struct */
+
+ new_port_settings.c_cflag = cbits | cpar | bstop | CLOCAL | CREAD;
+ new_port_settings.c_iflag = ipar;
+ new_port_settings.c_oflag = 0;
+ new_port_settings.c_lflag = 0;
+ new_port_settings.c_cc[VMIN] = 0; /* block untill n bytes are received */
+ new_port_settings.c_cc[VTIME] = 0; /* block untill a timer expires (n * 100 mSec.) */
+
+ cfsetispeed(&new_port_settings, baudr);
+ cfsetospeed(&new_port_settings, baudr);
+
+ error = tcsetattr(Cport[comport_number], TCSANOW, &new_port_settings);
+ if(error==-1)
+ {
+ tcsetattr(Cport[comport_number], TCSANOW, old_port_settings + comport_number);
+ close(Cport[comport_number]);
+ flock(Cport[comport_number], LOCK_UN); /* free the port so that others can use it. */
+ perror("unable to adjust portsettings ");
+ return(1);
+ }
+
+/* http://man7.org/linux/man-pages/man4/tty_ioctl.4.html */
+
+ if(ioctl(Cport[comport_number], TIOCMGET, &status) == -1)
+ {
+ tcsetattr(Cport[comport_number], TCSANOW, old_port_settings + comport_number);
+ flock(Cport[comport_number], LOCK_UN); /* free the port so that others can use it. */
+ perror("unable to get portstatus");
+ return(1);
+ }
+
+ status |= TIOCM_DTR; /* turn on DTR */
+ status |= TIOCM_RTS; /* turn on RTS */
+
+ if(ioctl(Cport[comport_number], TIOCMSET, &status) == -1)
+ {
+ tcsetattr(Cport[comport_number], TCSANOW, old_port_settings + comport_number);
+ flock(Cport[comport_number], LOCK_UN); /* free the port so that others can use it. */
+ perror("unable to set portstatus");
+ return(1);
+ }
+
+ return(0);
+}
+
+
+int RS232_PollComport(int comport_number, unsigned char *buf, int size)
+{
+ int n;
+
+ n = read(Cport[comport_number], buf, size);
+
+ if(n < 0)
+ {
+ if(errno == EAGAIN) return 0;
+ }
+
+ return(n);
+}
+
+
+int RS232_SendByte(int comport_number, unsigned char byte)
+{
+ int n = write(Cport[comport_number], &byte, 1);
+ if(n < 0)
+ {
+ if(errno == EAGAIN)
+ {
+ return 0;
+ }
+ else
+ {
+ return 1;
+ }
+ }
+
+ return(0);
+}
+
+
+int RS232_SendBuf(int comport_number, unsigned char *buf, int size)
+{
+ int n = write(Cport[comport_number], buf, size);
+ if(n < 0)
+ {
+ if(errno == EAGAIN)
+ {
+ return 0;
+ }
+ else
+ {
+ return -1;
+ }
+ }
+
+ return(n);
+}
+
+
+void RS232_CloseComport(int comport_number)
+{
+ int status;
+
+ if(ioctl(Cport[comport_number], TIOCMGET, &status) == -1)
+ {
+ perror("unable to get portstatus");
+ }
+
+ status &= ~TIOCM_DTR; /* turn off DTR */
+ status &= ~TIOCM_RTS; /* turn off RTS */
+
+ if(ioctl(Cport[comport_number], TIOCMSET, &status) == -1)
+ {
+ perror("unable to set portstatus");
+ }
+
+ tcsetattr(Cport[comport_number], TCSANOW, old_port_settings + comport_number);
+ close(Cport[comport_number]);
+
+ flock(Cport[comport_number], LOCK_UN); /* free the port so that others can use it. */
+}
+
+/*
+Constant Description
+TIOCM_LE DSR (data set ready/line enable)
+TIOCM_DTR DTR (data terminal ready)
+TIOCM_RTS RTS (request to send)
+TIOCM_ST Secondary TXD (transmit)
+TIOCM_SR Secondary RXD (receive)
+TIOCM_CTS CTS (clear to send)
+TIOCM_CAR DCD (data carrier detect)
+TIOCM_CD see TIOCM_CAR
+TIOCM_RNG RNG (ring)
+TIOCM_RI see TIOCM_RNG
+TIOCM_DSR DSR (data set ready)
+
+http://man7.org/linux/man-pages/man4/tty_ioctl.4.html
+*/
+
+int RS232_IsDCDEnabled(int comport_number)
+{
+ int status;
+
+ ioctl(Cport[comport_number], TIOCMGET, &status);
+
+ if(status&TIOCM_CAR) return(1);
+ else return(0);
+}
+
+
+int RS232_IsCTSEnabled(int comport_number)
+{
+ int status;
+
+ ioctl(Cport[comport_number], TIOCMGET, &status);
+
+ if(status&TIOCM_CTS) return(1);
+ else return(0);
+}
+
+
+int RS232_IsDSREnabled(int comport_number)
+{
+ int status;
+
+ ioctl(Cport[comport_number], TIOCMGET, &status);
+
+ if(status&TIOCM_DSR) return(1);
+ else return(0);
+}
+
+
+void RS232_enableDTR(int comport_number)
+{
+ int status;
+
+ if(ioctl(Cport[comport_number], TIOCMGET, &status) == -1)
+ {
+ perror("unable to get portstatus");
+ }
+
+ status |= TIOCM_DTR; /* turn on DTR */
+
+ if(ioctl(Cport[comport_number], TIOCMSET, &status) == -1)
+ {
+ perror("unable to set portstatus");
+ }
+}
+
+
+void RS232_disableDTR(int comport_number)
+{
+ int status;
+
+ if(ioctl(Cport[comport_number], TIOCMGET, &status) == -1)
+ {
+ perror("unable to get portstatus");
+ }
+
+ status &= ~TIOCM_DTR; /* turn off DTR */
+
+ if(ioctl(Cport[comport_number], TIOCMSET, &status) == -1)
+ {
+ perror("unable to set portstatus");
+ }
+}
+
+
+void RS232_enableRTS(int comport_number)
+{
+ int status;
+
+ if(ioctl(Cport[comport_number], TIOCMGET, &status) == -1)
+ {
+ perror("unable to get portstatus");
+ }
+
+ status |= TIOCM_RTS; /* turn on RTS */
+
+ if(ioctl(Cport[comport_number], TIOCMSET, &status) == -1)
+ {
+ perror("unable to set portstatus");
+ }
+}
+
+
+void RS232_disableRTS(int comport_number)
+{
+ int status;
+
+ if(ioctl(Cport[comport_number], TIOCMGET, &status) == -1)
+ {
+ perror("unable to get portstatus");
+ }
+
+ status &= ~TIOCM_RTS; /* turn off RTS */
+
+ if(ioctl(Cport[comport_number], TIOCMSET, &status) == -1)
+ {
+ perror("unable to set portstatus");
+ }
+}
+
+
+void RS232_flushRX(int comport_number)
+{
+ tcflush(Cport[comport_number], TCIFLUSH);
+}
+
+
+void RS232_flushTX(int comport_number)
+{
+ tcflush(Cport[comport_number], TCOFLUSH);
+}
+
+
+void RS232_flushRXTX(int comport_number)
+{
+ tcflush(Cport[comport_number], TCIOFLUSH);
+}
+
+
+#else /* windows */
+
+#define RS232_PORTNR 16
+
+HANDLE Cport[RS232_PORTNR];
+
+
+char *comports[RS232_PORTNR]={"\\\\.\\COM1", "\\\\.\\COM2", "\\\\.\\COM3", "\\\\.\\COM4",
+ "\\\\.\\COM5", "\\\\.\\COM6", "\\\\.\\COM7", "\\\\.\\COM8",
+ "\\\\.\\COM9", "\\\\.\\COM10", "\\\\.\\COM11", "\\\\.\\COM12",
+ "\\\\.\\COM13", "\\\\.\\COM14", "\\\\.\\COM15", "\\\\.\\COM16"};
+
+char mode_str[128];
+
+
+int RS232_OpenComport(int comport_number, int baudrate, const char *mode)
+{
+ if((comport_number>=RS232_PORTNR)||(comport_number<0))
+ {
+ printf("illegal comport number\n");
+ return(1);
+ }
+
+ switch(baudrate)
+ {
+ case 110 : strcpy(mode_str, "baud=110");
+ break;
+ case 300 : strcpy(mode_str, "baud=300");
+ break;
+ case 600 : strcpy(mode_str, "baud=600");
+ break;
+ case 1200 : strcpy(mode_str, "baud=1200");
+ break;
+ case 2400 : strcpy(mode_str, "baud=2400");
+ break;
+ case 4800 : strcpy(mode_str, "baud=4800");
+ break;
+ case 9600 : strcpy(mode_str, "baud=9600");
+ break;
+ case 19200 : strcpy(mode_str, "baud=19200");
+ break;
+ case 38400 : strcpy(mode_str, "baud=38400");
+ break;
+ case 57600 : strcpy(mode_str, "baud=57600");
+ break;
+ case 115200 : strcpy(mode_str, "baud=115200");
+ break;
+ case 128000 : strcpy(mode_str, "baud=128000");
+ break;
+ case 256000 : strcpy(mode_str, "baud=256000");
+ break;
+ case 500000 : strcpy(mode_str, "baud=500000");
+ break;
+ case 1000000 : strcpy(mode_str, "baud=1000000");
+ break;
+ default : printf("invalid baudrate\n");
+ return(1);
+ break;
+ }
+
+ if(strlen(mode) != 3)
+ {
+ printf("invalid mode \"%s\"\n", mode);
+ return(1);
+ }
+
+ switch(mode[0])
+ {
+ case '8': strcat(mode_str, " data=8");
+ break;
+ case '7': strcat(mode_str, " data=7");
+ break;
+ case '6': strcat(mode_str, " data=6");
+ break;
+ case '5': strcat(mode_str, " data=5");
+ break;
+ default : printf("invalid number of data-bits '%c'\n", mode[0]);
+ return(1);
+ break;
+ }
+
+ switch(mode[1])
+ {
+ case 'N':
+ case 'n': strcat(mode_str, " parity=n");
+ break;
+ case 'E':
+ case 'e': strcat(mode_str, " parity=e");
+ break;
+ case 'O':
+ case 'o': strcat(mode_str, " parity=o");
+ break;
+ default : printf("invalid parity '%c'\n", mode[1]);
+ return(1);
+ break;
+ }
+
+ switch(mode[2])
+ {
+ case '1': strcat(mode_str, " stop=1");
+ break;
+ case '2': strcat(mode_str, " stop=2");
+ break;
+ default : printf("invalid number of stop bits '%c'\n", mode[2]);
+ return(1);
+ break;
+ }
+
+ strcat(mode_str, " dtr=on rts=on");
+
+/*
+http://msdn.microsoft.com/en-us/library/windows/desktop/aa363145%28v=vs.85%29.aspx
+
+http://technet.microsoft.com/en-us/library/cc732236.aspx
+*/
+
+ Cport[comport_number] = CreateFileA(comports[comport_number],
+ GENERIC_READ|GENERIC_WRITE,
+ 0, /* no share */
+ NULL, /* no security */
+ OPEN_EXISTING,
+ 0, /* no threads */
+ NULL); /* no templates */
+
+ if(Cport[comport_number]==INVALID_HANDLE_VALUE)
+ {
+ printf("unable to open comport\n");
+ return(1);
+ }
+
+ DCB port_settings;
+ memset(&port_settings, 0, sizeof(port_settings)); /* clear the new struct */
+ port_settings.DCBlength = sizeof(port_settings);
+
+ if(!BuildCommDCBA(mode_str, &port_settings))
+ {
+ printf("unable to set comport dcb settings\n");
+ CloseHandle(Cport[comport_number]);
+ return(1);
+ }
+
+ if(!SetCommState(Cport[comport_number], &port_settings))
+ {
+ printf("unable to set comport cfg settings\n");
+ CloseHandle(Cport[comport_number]);
+ return(1);
+ }
+
+ COMMTIMEOUTS Cptimeouts;
+
+ Cptimeouts.ReadIntervalTimeout = MAXDWORD;
+ Cptimeouts.ReadTotalTimeoutMultiplier = 0;
+ Cptimeouts.ReadTotalTimeoutConstant = 0;
+ Cptimeouts.WriteTotalTimeoutMultiplier = 0;
+ Cptimeouts.WriteTotalTimeoutConstant = 0;
+
+ if(!SetCommTimeouts(Cport[comport_number], &Cptimeouts))
+ {
+ printf("unable to set comport time-out settings\n");
+ CloseHandle(Cport[comport_number]);
+ return(1);
+ }
+
+ return(0);
+}
+
+
+int RS232_PollComport(int comport_number, unsigned char *buf, int size)
+{
+ int n;
+
+/* added the void pointer cast, otherwise gcc will complain about */
+/* "warning: dereferencing type-punned pointer will break strict aliasing rules" */
+
+ ReadFile(Cport[comport_number], buf, size, (LPDWORD)((void *)&n), NULL);
+
+ return(n);
+}
+
+
+int RS232_SendByte(int comport_number, unsigned char byte)
+{
+ int n;
+
+ WriteFile(Cport[comport_number], &byte, 1, (LPDWORD)((void *)&n), NULL);
+
+ if(n<0) return(1);
+
+ return(0);
+}
+
+
+int RS232_SendBuf(int comport_number, unsigned char *buf, int size)
+{
+ int n;
+
+ if(WriteFile(Cport[comport_number], buf, size, (LPDWORD)((void *)&n), NULL))
+ {
+ return(n);
+ }
+
+ return(-1);
+}
+
+
+void RS232_CloseComport(int comport_number)
+{
+ CloseHandle(Cport[comport_number]);
+}
+
+/*
+http://msdn.microsoft.com/en-us/library/windows/desktop/aa363258%28v=vs.85%29.aspx
+*/
+
+int RS232_IsDCDEnabled(int comport_number)
+{
+ int status;
+
+ GetCommModemStatus(Cport[comport_number], (LPDWORD)((void *)&status));
+
+ if(status&MS_RLSD_ON) return(1);
+ else return(0);
+}
+
+
+int RS232_IsCTSEnabled(int comport_number)
+{
+ int status;
+
+ GetCommModemStatus(Cport[comport_number], (LPDWORD)((void *)&status));
+
+ if(status&MS_CTS_ON) return(1);
+ else return(0);
+}
+
+
+int RS232_IsDSREnabled(int comport_number)
+{
+ int status;
+
+ GetCommModemStatus(Cport[comport_number], (LPDWORD)((void *)&status));
+
+ if(status&MS_DSR_ON) return(1);
+ else return(0);
+}
+
+
+void RS232_enableDTR(int comport_number)
+{
+ EscapeCommFunction(Cport[comport_number], SETDTR);
+}
+
+
+void RS232_disableDTR(int comport_number)
+{
+ EscapeCommFunction(Cport[comport_number], CLRDTR);
+}
+
+
+void RS232_enableRTS(int comport_number)
+{
+ EscapeCommFunction(Cport[comport_number], SETRTS);
+}
+
+
+void RS232_disableRTS(int comport_number)
+{
+ EscapeCommFunction(Cport[comport_number], CLRRTS);
+}
+
+/*
+https://msdn.microsoft.com/en-us/library/windows/desktop/aa363428%28v=vs.85%29.aspx
+*/
+
+void RS232_flushRX(int comport_number)
+{
+ PurgeComm(Cport[comport_number], PURGE_RXCLEAR | PURGE_RXABORT);
+}
+
+
+void RS232_flushTX(int comport_number)
+{
+ PurgeComm(Cport[comport_number], PURGE_TXCLEAR | PURGE_TXABORT);
+}
+
+
+void RS232_flushRXTX(int comport_number)
+{
+ PurgeComm(Cport[comport_number], PURGE_RXCLEAR | PURGE_RXABORT);
+ PurgeComm(Cport[comport_number], PURGE_TXCLEAR | PURGE_TXABORT);
+}
+
+
+#endif
+
+
+void RS232_cputs(int comport_number, const char *text) /* sends a string to serial port */
+{
+ while(*text != 0) RS232_SendByte(comport_number, *(text++));
+}
+
+
+/* return index in comports matching to device name or -1 if not found */
+int RS232_GetPortnr(const char *devname)
+{
+ int i;
+
+ char str[32];
+
+#if defined(__linux__) || defined(__FreeBSD__) /* Linux & FreeBSD */
+ strcpy(str, "/dev/");
+#else /* windows */
+ strcpy(str, "\\\\.\\");
+#endif
+ strncat(str, devname, 16);
+ str[31] = 0;
+
+ for(i=0; i<RS232_PORTNR; i++)
+ {
+ if(!strcmp(comports[i], str))
+ {
+ return i;
+ }
+ }
+
+ return -1; /* device not found */
+}
+
+
+
+
+
+
+
+
+
+
+
diff --git a/RS-232/rs232.h b/RS-232/rs232.h
new file mode 100644
index 0000000..4a8bdcf
--- /dev/null
+++ b/RS-232/rs232.h
@@ -0,0 +1,87 @@
+/*
+***************************************************************************
+*
+* Author: Teunis van Beelen
+*
+* Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 Teunis van Beelen
+*
+* Email: teuniz@gmail.com
+*
+***************************************************************************
+*
+* 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 3 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, see <http://www.gnu.org/licenses/>.
+*
+***************************************************************************
+*/
+
+/* Last revision: August 5, 2017 */
+
+/* For more info and how to use this library, visit: http://www.teuniz.net/RS-232/ */
+
+
+#ifndef rs232_INCLUDED
+#define rs232_INCLUDED
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdio.h>
+#include <string.h>
+
+
+
+#if defined(__linux__) || defined(__FreeBSD__)
+
+#include <termios.h>
+#include <sys/ioctl.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <limits.h>
+#include <sys/file.h>
+#include <errno.h>
+
+#else
+
+#include <windows.h>
+
+#endif
+
+int RS232_OpenComport(int, int, const char *);
+int RS232_PollComport(int, unsigned char *, int);
+int RS232_SendByte(int, unsigned char);
+int RS232_SendBuf(int, unsigned char *, int);
+void RS232_CloseComport(int);
+void RS232_cputs(int, const char *);
+int RS232_IsDCDEnabled(int);
+int RS232_IsCTSEnabled(int);
+int RS232_IsDSREnabled(int);
+void RS232_enableDTR(int);
+void RS232_disableDTR(int);
+void RS232_enableRTS(int);
+void RS232_disableRTS(int);
+void RS232_flushRX(int);
+void RS232_flushTX(int);
+void RS232_flushRXTX(int);
+int RS232_GetPortnr(const char *);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif
+
+