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update spi clock polarity

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- Perform an empty SPI transfer after setting speed and mode
This commit is contained in:
Robin Müller 2022-02-22 18:58:20 +01:00
parent 19f8e41c7f
commit d88d7c938f
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) { if (retval != 0) {
utility::handleIoctlError("SpiComIF::setSpiSpeedAndMode: Setting SPI speed failed"); 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.
clockUpdateTransfer.len = 0;
retval = ioctl(spiFd, SPI_IOC_MESSAGE(1), &clockUpdateTransfer);
if (retval != 0) {
utility::handleIoctlError("SpiComIF::setSpiSpeedAndMode: Updating SPI default clock failed");
}
} }

1
hal/src/fsfw_hal/linux/spi/SpiComIF.h
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@ -74,6 +74,7 @@ class SpiComIF : public DeviceCommunicationIF, public SystemObject {
MutexIF* spiMutex = nullptr; MutexIF* spiMutex = nullptr;
MutexIF::TimeoutType timeoutType = MutexIF::TimeoutType::WAITING; MutexIF::TimeoutType timeoutType = MutexIF::TimeoutType::WAITING;
uint32_t timeoutMs = 20; uint32_t timeoutMs = 20;
spi_ioc_transfer clockUpdateTransfer = {};
using SpiDeviceMap = std::unordered_map<address_t, SpiInstance>; using SpiDeviceMap = std::unordered_map<address_t, SpiInstance>;
using SpiDeviceMapIter = SpiDeviceMap::iterator; using SpiDeviceMapIter = SpiDeviceMap::iterator;