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uart: disable timeout on read <= 0

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Signed-off-by: Le Jin <le.jin@siemens.com>
Signed-off-by: Ivan Mikhaylov <ivan.mikhaylov@siemens.com>
This commit is contained in:
Ivan Mikhaylov
2022-07-15 20:43:04 +00:00
committed by Tom Ingleby
parent 307a6f3bdd
commit 4450073721
1 changed files with 8 additions and 1 deletions
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9
src/uart/uart.c
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@@ -692,7 +692,14 @@ mraa_uart_set_timeout(mraa_uart_context dev, int read, int write, int interchar)
read = 1; read = 1;
} }
termio.c_lflag &= ~ICANON; /* Set non-canonical mode */ termio.c_lflag &= ~ICANON; /* Set non-canonical mode */
termio.c_cc[VTIME] = read; /* Set timeout in tenth seconds */ if (read > 0) {
termio.c_cc[VTIME] = read; /* Set timeout in tenth seconds */
termio.c_cc[VMIN] = 0;
} else {
termio.c_cc[VTIME] = 0; /* read <= 0 will disable timeout */
termio.c_cc[VMIN] = 1;
}
if (tcsetattr(dev->fd, TCSANOW, &termio) < 0) { if (tcsetattr(dev->fd, TCSANOW, &termio) < 0) {
syslog(LOG_ERR, "uart%i: set_timeout: tcsetattr() failed: %s", dev->index, strerror(errno)); syslog(LOG_ERR, "uart%i: set_timeout: tcsetattr() failed: %s", dev->index, strerror(errno));
return MRAA_ERROR_FEATURE_NOT_SUPPORTED; return MRAA_ERROR_FEATURE_NOT_SUPPORTED;