eive/fsfw
eive/fsfw
15
1
Fork 0
forked from fsfw/fsfw
Code Issues Pull Requests Releases 1 Wiki Activity

update spi clock polarity

Browse Source 
- 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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
hal/src/fsfw_hal/linux/spi/SpiComIF.cpp
View File

@ -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.
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
View File

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