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SPI HAL improvement

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- Initialize line state
This commit is contained in:
Robin Müller
2022-03-07 16:13:04 +01:00
parent 5912ddd2a2
commit 32f420c4f0
2 changed files with 9 additions and 0 deletions
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8
hal/src/fsfw_hal/linux/spi/SpiComIF.cpp
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@@ -401,4 +401,12 @@ void SpiComIF::setSpiSpeedAndMode(int spiFd, spi::SpiModes mode, uint32_t speed)
if (retval != 0) {
utility::handleIoctlError("SpiComIF::setSpiSpeedAndMode: Setting SPI speed failed");
}
// This updates the SPI clock default polarity. Only setting the mode does not update
// the line state, which can be an issue on mode switches because the clock line will
// switch the state after the chip select is pulled low
clockUpdateTransfer.len = 0;
retval = ioctl(spiFd, SPI_IOC_MESSAGE(1), &clockUpdateTransfer);
if (retval != 0) {
utility::handleIoctlError("SpiComIF::setSpiSpeedAndMode: Updating SPI default clock failed");
}
}