diff options
Diffstat (limited to 'lib/hidflash/rs232.c')
| -rw-r--r-- | lib/hidflash/rs232.c | 314 |
1 files changed, 314 insertions, 0 deletions
diff --git a/lib/hidflash/rs232.c b/lib/hidflash/rs232.c new file mode 100644 index 00000000..ce7de085 --- /dev/null +++ b/lib/hidflash/rs232.c @@ -0,0 +1,314 @@ +/* +*************************************************************************** +* +* 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" +#include <string.h> +#include <stdio.h> + +#if defined(__linux__) || defined(__FreeBSD__) || defined(__APPLE__) /* Linux & FreeBSD */ + + int tty_fd; + struct termios old_termios; + struct termios new_termios; + + + int RS232_OpenComport(char *comport) { + + char str[64]= "/dev/"; + strcat(str, comport); + + tty_fd = open(str, O_RDWR | O_NOCTTY); + if (tty_fd < 0) { + fprintf(stderr, "error, counldn't open [%s]\n", str); + return 1; + } + if (tcgetattr(tty_fd, &old_termios) != 0) { + fprintf(stderr, "tcgetattr(fd, &old_termios) failed: %s\n", strerror(errno)); + return 1; + } + memset(&new_termios, 0, sizeof(new_termios)); + new_termios.c_iflag = IGNPAR; + new_termios.c_oflag = 0; + new_termios.c_cflag = CS8 | CREAD | CLOCAL | HUPCL; + new_termios.c_lflag = 0; + new_termios.c_cc[VINTR] = 0; + new_termios.c_cc[VQUIT] = 0; + new_termios.c_cc[VERASE] = 0; + new_termios.c_cc[VKILL] = 0; + new_termios.c_cc[VEOF] = 4; + new_termios.c_cc[VTIME] = 0; + new_termios.c_cc[VMIN] = 1; + //new_termios.c_cc[VSWTC] = 0; + new_termios.c_cc[VSTART] = 0; + new_termios.c_cc[VSTOP] = 0; + new_termios.c_cc[VSUSP] = 0; + new_termios.c_cc[VEOL] = 0; + new_termios.c_cc[VREPRINT] = 0; + new_termios.c_cc[VDISCARD] = 0; + new_termios.c_cc[VWERASE] = 0; + new_termios.c_cc[VLNEXT] = 0; + new_termios.c_cc[VEOL2] = 0; + + + if (cfsetispeed(&new_termios, B1200) != 0) { + fprintf(stderr, "cfsetispeed(&new_termios, B1200) failed: %s\n", strerror(errno)); + return 1; + } + if (cfsetospeed(&new_termios, B1200) != 0) { + fprintf(stderr, "cfsetospeed(&new_termios, B1200) failed: %s\n", strerror(errno)); + return 1; + } + + if (tcsetattr(tty_fd, TCSANOW, &new_termios) != 0) { + fprintf(stderr, "tcsetattr(fd, TCSANOW, &new_termios) failed: %s\n", strerror(errno)); + return 1; + } + + return 0; +//====================================================================================== + } + + + int RS232_SendByte(unsigned char byte) { + int n = write(tty_fd, &byte, 1); + if(n < 0) { + if(errno == EAGAIN) { + return 0; + } else { + return 1; + } + } + + + return(0); + } + +/* + int RS232_ReadByte() { + unsigned char c; + if (read(tty_fd,&c,1)>0) { + return c; + } + + return -1; + } +*/ + + void RS232_CloseComport() { + + tcsetattr(tty_fd, TCSANOW, &old_termios); + close(tty_fd); + + } + + + void RS232_enableDTR() { + int status; + + if(ioctl(tty_fd, TIOCMGET, &status) == -1) { + perror("unable to get portstatus"); + } + + status |= TIOCM_DTR; /* turn on DTR */ + + if(ioctl(tty_fd, TIOCMSET, &status) == -1) { + perror("unable to set portstatus"); + } + } + + + void RS232_disableDTR() + { + int status; + + if(ioctl(tty_fd, TIOCMGET, &status) == -1) { + perror("unable to get portstatus"); + } + + status &= ~TIOCM_DTR; /* turn off DTR */ + + if(ioctl(tty_fd, TIOCMSET, &status) == -1) { + perror("unable to set portstatus"); + } + } + + + void RS232_enableRTS() + { + int status; + + if(ioctl(tty_fd, TIOCMGET, &status) == -1) { + perror("unable to get portstatus"); + } + + status |= TIOCM_RTS; /* turn on RTS */ + + if(ioctl(tty_fd, TIOCMSET, &status) == -1) { + perror("unable to set portstatus"); + } + } + + + void RS232_disableRTS() { + int status; + + if(ioctl(tty_fd, TIOCMGET, &status) == -1) { + perror("unable to get portstatus"); + } + + status &= ~TIOCM_RTS; /* turn off RTS */ + + if(ioctl(tty_fd, TIOCMSET, &status) == -1) { + perror("unable to set portstatus"); + } + } + + void RS232_send_magic(){ + write(tty_fd,"1EAF",4); + } + + +#else /* windows */ + +HANDLE Cport; + +char mode_str_2[] = "baud=9600 data=8 parity=n stop=1 dtr=off rts=off"; + +int RS232_OpenComport(char *comport) +{ + + //printf("%s\n %s\n %s\n %p\n", mode_str_2, comports[comport_number], comport, Cport); + + char str[32] = "\\\\.\\"; + strcat(str, comport); + //printf("%s\n", str); + + Cport = CreateFileA(str, + GENERIC_READ|GENERIC_WRITE, + 0, /* no share */ + NULL, /* no security */ + OPEN_EXISTING, + 0, /* no threads */ + NULL); /* no templates */ + + if(Cport==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_2, &port_settings)) + { + printf("> unable to set comport dcb settings\n"); + CloseHandle(Cport); + return(1); + } + + if(!SetCommState(Cport, &port_settings)) + { + printf("> unable to set comport cfg settings\n"); + CloseHandle(Cport); + return(1); + } + + COMMTIMEOUTS Cptimeouts; + + Cptimeouts.ReadIntervalTimeout = MAXDWORD; + Cptimeouts.ReadTotalTimeoutMultiplier = 0; + Cptimeouts.ReadTotalTimeoutConstant = 0; + Cptimeouts.WriteTotalTimeoutMultiplier = 0; + Cptimeouts.WriteTotalTimeoutConstant = 0; + + if(!SetCommTimeouts(Cport, &Cptimeouts)) + { + printf("> unable to set comport time-out settings\n"); + CloseHandle(Cport); + return(1); + } + + return(0); +} + + +int RS232_SendByte(unsigned char byte) +{ + int n; + + WriteFile(Cport, &byte, 1, (LPDWORD)((void *)&n), NULL); + + if(n<0) return(1); + + return(0); +} + +void RS232_CloseComport() +{ + CloseHandle(Cport); +} + +void RS232_enableDTR() +{ + EscapeCommFunction(Cport, SETDTR); +} + + +void RS232_disableDTR() +{ + EscapeCommFunction(Cport, CLRDTR); +} + + +void RS232_enableRTS() +{ + EscapeCommFunction(Cport, SETRTS); +} + + +void RS232_disableRTS() +{ + EscapeCommFunction(Cport, CLRRTS); +} + +void RS232_send_magic() +{ + int n; + + WriteFile(Cport, "1EAF", 4, (LPDWORD)((void *)&n), NULL); +} + +#endif + |