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Diffstat (limited to 'RS232')
| -rw-r--r-- | RS232/LICENSE | 687 | ||||
| -rw-r--r-- | RS232/RS-232.tar | bin | 0 -> 107520 bytes | |||
| -rw-r--r-- | RS232/demo_rx.c | 72 | ||||
| -rw-r--r-- | RS232/demo_tx.c | 67 | ||||
| -rw-r--r-- | RS232/doc.txt | 223 | ||||
| -rw-r--r-- | RS232/gpl.txt | 687 | ||||
| -rw-r--r-- | RS232/howto_compile.txt | 26 | ||||
| -rw-r--r-- | RS232/rs232.c | 747 | ||||
| -rw-r--r-- | RS232/rs232.h | 85 | ||||
| -rwxr-xr-x | RS232/test_rx | bin | 0 -> 13588 bytes |
10 files changed, 2594 insertions, 0 deletions
diff --git a/RS232/LICENSE b/RS232/LICENSE new file mode 100644 index 0000000..682b1b4 --- /dev/null +++ b/RS232/LICENSE @@ -0,0 +1,687 @@ + +This is free software, it is experimental and available under the +GPL License version 3. +Despite this software is intend to be useful, there is no warranty, +Use this software at your own risk! + +EDFbrowser may NOT be used in safety-critical applications, +such as life-support medical systems. +The author is NOT responsible for any consequences. +For research and educational purpose only. + + + 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. 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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/RS232/RS-232.tar b/RS232/RS-232.tar Binary files differnew file mode 100644 index 0000000..2915e88 --- /dev/null +++ b/RS232/RS-232.tar diff --git a/RS232/demo_rx.c b/RS232/demo_rx.c new file mode 100644 index 0000000..db9c41d --- /dev/null +++ b/RS232/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=2, /* /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/RS232/demo_tx.c b/RS232/demo_tx.c new file mode 100644 index 0000000..e723bf9 --- /dev/null +++ b/RS232/demo_tx.c @@ -0,0 +1,67 @@ + +/************************************************** + +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/RS232/doc.txt b/RS232/doc.txt new file mode 100644 index 0000000..c7930df --- /dev/null +++ b/RS232/doc.txt @@ -0,0 +1,223 @@ + +Library: RS-232 +Author: Teunis van Beelen +Url: http://www.teuniz.net/RS-232/ +E-mail: teuniz@gmail.com +License: GPLv3 + +Last revision: December 19, 2015 + + + +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. + 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. + + +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/RS232/gpl.txt b/RS232/gpl.txt new file mode 100644 index 0000000..682b1b4 --- /dev/null +++ b/RS232/gpl.txt @@ -0,0 +1,687 @@ + +This is free software, it is experimental and available under the +GPL License version 3. +Despite this software is intend to be useful, there is no warranty, +Use this software at your own risk! + +EDFbrowser may NOT be used in safety-critical applications, +such as life-support medical systems. +The author is NOT responsible for any consequences. +For research and educational purpose only. + + + 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. 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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/RS232/howto_compile.txt b/RS232/howto_compile.txt new file mode 100644 index 0000000..9cf92c0 --- /dev/null +++ b/RS232/howto_compile.txt @@ -0,0 +1,26 @@ + +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 + +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/RS232/rs232.c b/RS232/rs232.c new file mode 100644 index 0000000..0b2f116 --- /dev/null +++ b/RS232/rs232.c @@ -0,0 +1,747 @@ +/* +*************************************************************************** +* +* Author: Teunis van Beelen +* +* Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 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: December 19, 2015 */ + +/* 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 */ + + +int Cport[38], + error; + +struct termios new_port_settings, + old_port_settings[38]; + +char comports[38][16]={"/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>37)||(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]); + 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) + { + close(Cport[comport_number]); + perror("unable to adjust portsettings "); + return(1); + } + + if(ioctl(Cport[comport_number], TIOCMGET, &status) == -1) + { + 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) + { + 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); + + return(n); +} + + +int RS232_SendByte(int comport_number, unsigned char byte) +{ + int n; + + n = write(Cport[comport_number], &byte, 1); + if(n<0) return(1); + + return(0); +} + + +int RS232_SendBuf(int comport_number, unsigned char *buf, int size) +{ + return(write(Cport[comport_number], buf, size)); +} + + +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 */ + + +HANDLE Cport[16]; + + +char comports[16][10]={"\\\\.\\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>15)||(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++)); +} + + diff --git a/RS232/rs232.h b/RS232/rs232.h new file mode 100644 index 0000000..b2e0d38 --- /dev/null +++ b/RS232/rs232.h @@ -0,0 +1,85 @@ +/* +*************************************************************************** +* +* Author: Teunis van Beelen +* +* Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 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: December 19, 2015 */ + +/* For more info and how to use this libray, 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> + +#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); + +#ifdef __cplusplus +} /* extern "C" */ +#endif + +#endif + + diff --git a/RS232/test_rx b/RS232/test_rx Binary files differnew file mode 100755 index 0000000..d0e8bfd --- /dev/null +++ b/RS232/test_rx |