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UartComIF: set O_NONBLOCK in canonical mode

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When using the non-canonical mode, the file descriptor can be opened
in blocking mode because the VTIME and VMIN termios parameters are
used to configure non-blocking mode. However, in canonical mode, the fd needs to be opened with O_NONBLOCK
This commit is contained in:
Robin Müller 2021-08-22 19:48:35 +02:00
parent 7d0377845b
commit 5454169e20
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1 changed files with 7 additions and 1 deletions
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8
hal/src/fsfw_hal/linux/uart/UartComIF.cpp
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@ -60,7 +60,13 @@ int UartComIF::configureUartPort(UartCookie* uartCookie) {
struct termios options = {};
std::string deviceFile = uartCookie->getDeviceFile();
int fd = open(deviceFile.c_str(), O_RDWR);
int flags = O_RDWR;
if(uartCookie->getUartMode() == UartModes::CANONICAL) {
// In non-canonical mode, don't specify O_NONBLOCK because these properties will be
// controlled by the VTIME and VMIN parameters and O_NONBLOCK would override this
flags |= O_NONBLOCK;
}
int fd = open(deviceFile.c_str(), flags);
if (fd < 0) {
sif::warning << "UartComIF::configureUartPort: Failed to open uart " << deviceFile <<