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uart: Added timeout support for uart read

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Signed-off-by: Henry Bruce <henry.bruce@intel.com>
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
This commit is contained in:
Henry Bruce
2015-12-17 15:31:48 -08:00
committed by Brendan Le Foll
parent a708e08101
commit 63604ef5cc
1 changed files with 19 additions and 1 deletions
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20
src/uart/uart.c
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@@ -425,7 +425,25 @@ mraa_uart_set_timeout(mraa_uart_context dev, int read, int write, int interchar)
return MRAA_ERROR_INVALID_HANDLE;
}
return MRAA_ERROR_FEATURE_NOT_IMPLEMENTED;
struct termios termio;
// get current modes
if (tcgetattr(dev->fd, &termio)) {
syslog(LOG_ERR, "uart: tcgetattr() failed");
return MRAA_ERROR_FEATURE_NOT_SUPPORTED;
}
if (read > 0) {
read = read / 100;
if (read == 0)
read = 1;
}
termio.c_lflag &= ~ICANON; /* Set non-canonical mode */
termio.c_cc[VTIME] = read; /* Set timeout in tenth seconds */
if (tcsetattr(dev->fd, TCSANOW, &termio) < 0) {
syslog(LOG_ERR, "uart: tcsetattr() failed");
return MRAA_ERROR_FEATURE_NOT_SUPPORTED;
}
return MRAA_SUCCESS;
}
const char*