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serial: fix issue with 8th bit being stripped when using parity

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When opening a serial port using serial_open_advanced which is
configured to be 8 data bits with a parity bit, the most significant
bit is strip from the data bits. This is caused by the ISTRIP flag
being set for the terminal attribute flags. Fix this by only setting
the ISTRIP flag when there are less than 8 data bits.

Signed-off-by: Ryan Barnett <ryan.barnett@rockwellcollins.com>
Signed-off-by: Vanya A. Sergeev <v@sergeev.io>
This commit is contained in:
Ryan Barnett
2018-04-23 14:17:50 -05:00
committed by Vanya A. Sergeev
parent 06f0d3e647
commit 537eeacc89
1 changed files with 4 additions and 1 deletions
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5
src/serial.c
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@@ -159,7 +159,10 @@ int serial_open_advanced(serial_t *serial, const char *path, uint32_t baudrate,
/* Ignore break characters */
termios_settings.c_iflag = IGNBRK;
if (parity != PARITY_NONE)
termios_settings.c_iflag |= (INPCK | ISTRIP);
termios_settings.c_iflag |= INPCK;
/* Only use ISTRIP when less than 8 bits as it strips the 8th bit */
if (parity != PARITY_NONE && databits != 8)
termios_settings.c_iflag |= ISTRIP;
if (xonxoff)
termios_settings.c_iflag |= (IXON | IXOFF);