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Some improvements

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- Rename mutex to csMutex to better represent its purpose
- Move the empty transfer to update the line polarity to separate function
This commit is contained in:
Robin Müller 2022-05-11 11:24:06 +02:00
parent e06c457743
commit 56e4fca06f
No known key found for this signature in database
GPG Key ID: 71B58F8A3CDFA9AC
2 changed files with 36 additions and 16 deletions
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35
hal/src/fsfw_hal/linux/spi/SpiComIF.cpp
View File

@ -27,7 +27,7 @@ SpiComIF::SpiComIF(object_id_t objectId, std::string devname, GpioIF* gpioComIF)
#endif /* FSFW_VERBOSE_LEVEL >= 1 */
}
spiMutex = MutexFactory::instance()->createMutex();
csMutex = MutexFactory::instance()->createMutex();
}
ReturnValue_t SpiComIF::initializeInterface(CookieIF* cookie) {
@ -197,7 +197,7 @@ ReturnValue_t SpiComIF::performRegularSendOperation(SpiCookie* spiCookie, const
/* Pull SPI CS low. For now, no support for active high given */
if (gpioId != gpio::NO_GPIO) {
result = spiMutex->lockMutex(timeoutType, timeoutMs);
result = csMutex->lockMutex(timeoutType, timeoutMs);
if (result != RETURN_OK) {
#if FSFW_VERBOSE_LEVEL >= 1
#if FSFW_CPP_OSTREAM_ENABLED == 1
@ -208,6 +208,7 @@ ReturnValue_t SpiComIF::performRegularSendOperation(SpiCookie* spiCookie, const
#endif
return result;
}
updateLinePolarity(fileDescriptor);
ReturnValue_t result = gpioComIF->pullLow(gpioId);
if (result != HasReturnvaluesIF::RETURN_OK) {
#if FSFW_VERBOSE_LEVEL >= 1
@ -219,6 +220,8 @@ ReturnValue_t SpiComIF::performRegularSendOperation(SpiCookie* spiCookie, const
#endif
return result;
}
} else {
updateLinePolarity(fileDescriptor);
}
/* Execute transfer */
@ -248,7 +251,7 @@ ReturnValue_t SpiComIF::performRegularSendOperation(SpiCookie* spiCookie, const
if (gpioId != gpio::NO_GPIO) {
gpioComIF->pullHigh(gpioId);
result = spiMutex->unlockMutex();
result = csMutex->unlockMutex();
if (result != RETURN_OK) {
#if FSFW_CPP_OSTREAM_ENABLED == 1
sif::error << "SpiComIF::sendMessage: Failed to unlock mutex" << std::endl;
@ -291,7 +294,7 @@ ReturnValue_t SpiComIF::performHalfDuplexReception(SpiCookie* spiCookie) {
gpioId_t gpioId = spiCookie->getChipSelectPin();
if (gpioId != gpio::NO_GPIO) {
result = spiMutex->lockMutex(timeoutType, timeoutMs);
result = csMutex->lockMutex(timeoutType, timeoutMs);
if (result != RETURN_OK) {
#if FSFW_CPP_OSTREAM_ENABLED == 1
sif::error << "SpiComIF::getSendSuccess: Failed to lock mutex" << std::endl;
@ -314,7 +317,7 @@ ReturnValue_t SpiComIF::performHalfDuplexReception(SpiCookie* spiCookie) {
if (gpioId != gpio::NO_GPIO) {
gpioComIF->pullHigh(gpioId);
result = spiMutex->unlockMutex();
result = csMutex->unlockMutex();
if (result != RETURN_OK) {
#if FSFW_CPP_OSTREAM_ENABLED == 1
sif::error << "SpiComIF::getSendSuccess: Failed to unlock mutex" << std::endl;
@ -350,7 +353,7 @@ MutexIF* SpiComIF::getMutex(MutexIF::TimeoutType* timeoutType, uint32_t* timeout
if (timeoutMs != nullptr) {
*timeoutMs = this->timeoutMs;
}
return spiMutex;
return csMutex;
}
void SpiComIF::performSpiWiretapping(SpiCookie* spiCookie) {
@ -398,14 +401,6 @@ 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");
}
}
void SpiComIF::getSpiSpeedAndMode(int spiFd, spi::SpiModes& mode, uint32_t& speed) const {
@ -422,4 +417,14 @@ void SpiComIF::getSpiSpeedAndMode(int spiFd, spi::SpiModes& mode, uint32_t& spee
}
}
const std::string& SpiComIF::getSpiDev() const { return dev; }
const std::string& SpiComIF::getSpiDev() const {
return dev;
}
void SpiComIF::updateLinePolarity(int spiFd) {
clockUpdateTransfer.len = 0;
int retval = ioctl(spiFd, SPI_IOC_MESSAGE(1), &clockUpdateTransfer);
if (retval != 0) {
utility::handleIoctlError("SpiComIF::setSpiSpeedAndMode: Updating SPI default clock failed");
}
}

17
hal/src/fsfw_hal/linux/spi/SpiComIF.h
View File

@ -59,6 +59,17 @@ class SpiComIF : public DeviceCommunicationIF, public SystemObject {
GpioIF* getGpioInterface();
void setSpiSpeedAndMode(int spiFd, spi::SpiModes mode, uint32_t speed);
/**
* 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.
*
* It is recommended to call this function after #setSpiSpeedAndMode if the SPI bus
* has multiple SPI devices with different speed and SPI modes attached.
* @param spiFd
*/
void updateLinePolarity(int spiFd);
void getSpiSpeedAndMode(int spiFd, spi::SpiModes& mode, uint32_t& speed) const;
const std::string& getSpiDev() const;
@ -74,7 +85,11 @@ class SpiComIF : public DeviceCommunicationIF, public SystemObject {
GpioIF* gpioComIF = nullptr;
std::string dev = "";
MutexIF* spiMutex = nullptr;
/**
* Protects the chip select operations. Lock when GPIO is pulled low, unlock after it was
* pulled high
*/
MutexIF* csMutex = nullptr;
MutexIF::TimeoutType timeoutType = MutexIF::TimeoutType::WAITING;
uint32_t timeoutMs = 20;
spi_ioc_transfer clockUpdateTransfer = {};