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Disable input and output processing on Unix serial ports

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Disabling output processing is necessary since otherwise
sending a LF character (ASCII 0x0A) will automatically insert
a CR character (ASCII 0x0D).
Disabling input processing should prevent this when
receiving data.
This commit is contained in:
Armin Wolf 2023-09-01 21:20:35 +02:00 • committed by Adam Honse
parent 0279aafb97
commit fa52f4d7e0
1 changed files with 4 additions and 1 deletions
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5
serial_port/serial_port.cpp
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@ -318,10 +318,13 @@ bool serial_port::serial_open()
options.c_lflag &= ~ECHOE; // Disable erasure
options.c_lflag &= ~ECHONL; // Disable new-line echo
options.c_lflag &= ~ISIG; // Disable interpretation of INTR, QUIT and SUSP
options.c_lflag &= ~IEXTEN; // Disable input processing
options.c_iflag &= ~(IXON | IXOFF | IXANY); // Turn off s/w flow ctrl
options.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL); // Disable any special handling of received bytes
options.c_oflag &= ~OPOST; // Disable output processing;
/*-----------------------------------------*\
| Set the port configuration options |
\*-----------------------------------------*/
@ -420,7 +423,7 @@ bool serial_port::serial_open()
/*-----------------------------------------*\
| Configure additional parameters |
\*-----------------------------------------*/
options.c_lflag &= ~(ICANON | ISIG | ECHO);
options.c_lflag &= ~(ICANON | IEXTEN | ISIG | ECHO);
options.c_iflag &= ~(INLCR | ICRNL);
options.c_iflag |= IGNPAR | IGNBRK;