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lock the device, fix baudrate setting

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This commit is contained in:
John-Michael Baier
2020-12-09 22:32:13 +01:00
parent 65c302ae1a
commit 7784b89e33
1 changed files with 13 additions and 8 deletions
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src/tools/ebuspicloader.cpp
+13 -8
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@@ -568,23 +568,28 @@ int openSerial(std::string port) {
return -1; return -1;
} }
// backup terminal settings if (flock(fd, LOCK_EX|LOCK_NB)) {
if (tcgetattr(fd, &termios_original)!=0) { close(fd);
memset(&termios_original, 0, sizeof(termios_original)); std::cerr<<"unable to lock "<<port<<std::endl;
return -1;
} }
// backup terminal settings
tcgetattr(fd, &termios_original);
// configure terminal settings // configure terminal settings
struct termios termios = termios_original; struct termios termios;
memset(&termios, 0, sizeof(termios));
if (cfsetspeed(&termios, BAUDRATE)!=0) { if (cfsetspeed(&termios, BAUDRATE)!=0) {
std::cerr<<"unable to set speed "<<std::endl; std::cerr<<"unable to set speed "<<std::endl;
close(fd); close(fd);
return -1; return -1;
} }
termios.c_iflag = 0;//IGNPAR;//IGNBRK|IGNPAR|IGNCR; termios.c_iflag |= 0;//IGNPAR;//IGNBRK|IGNPAR|IGNCR;
termios.c_oflag = 0; termios.c_oflag |= 0;
termios.c_cflag = CS8 | CREAD | CLOCAL; termios.c_cflag |= CS8 | CREAD | CLOCAL;
termios.c_lflag = 0; termios.c_lflag |= 0;
termios.c_cc[VMIN] = 1; termios.c_cc[VMIN] = 1;
termios.c_cc[VTIME] = 0; termios.c_cc[VTIME] = 0;
if (tcsetattr(fd, TCSANOW, &termios)!=0) { if (tcsetattr(fd, TCSANOW, &termios)!=0) {