fsfw-hal/linux/spi/SpiComIF.h

90 lines
3.0 KiB
C++

#ifndef LINUX_SPI_SPICOMIF_H_
#define LINUX_SPI_SPICOMIF_H_
#include "spiDefinitions.h"
#include <returnvalues/classIds.h>
#include <fsfw_hal/common/gpio/GpioIF.h>
#include <fsfw/devicehandlers/DeviceCommunicationIF.h>
#include <fsfw/objectmanager/SystemObject.h>
#include <vector>
#include <unordered_map>
class SpiCookie;
/**
* @brief Encapsulates access to linux SPI driver for FSFW objects
* @details
* Right now, only full-duplex SPI is supported.
* @author R. Mueller
*/
class SpiComIF: public DeviceCommunicationIF, public SystemObject {
public:
static constexpr uint8_t spiRetvalId = CLASS_ID::LINUX_SPI_COM_IF;
static constexpr ReturnValue_t OPENING_FILE_FAILED =
HasReturnvaluesIF::makeReturnCode(spiRetvalId, 0);
/* Full duplex (ioctl) transfer failure */
static constexpr ReturnValue_t FULL_DUPLEX_TRANSFER_FAILED =
HasReturnvaluesIF::makeReturnCode(spiRetvalId, 1);
/* Half duplex (read/write) transfer failure */
static constexpr ReturnValue_t HALF_DUPLEX_TRANSFER_FAILED =
HasReturnvaluesIF::makeReturnCode(spiRetvalId, 2);
SpiComIF(object_id_t objectId, GpioIF* gpioComIF);
ReturnValue_t initializeInterface(CookieIF * cookie) override;
ReturnValue_t sendMessage(CookieIF *cookie,const uint8_t *sendData,
size_t sendLen) override;
ReturnValue_t getSendSuccess(CookieIF *cookie) override;
ReturnValue_t requestReceiveMessage(CookieIF *cookie,
size_t requestLen) override;
ReturnValue_t readReceivedMessage(CookieIF *cookie, uint8_t **buffer,
size_t *size) override;
/**
* @brief This function returns the mutex which can be used to protect the spi bus when
* the chip select must be driven from outside of the com if.
*/
MutexIF* getMutex(MutexIF::TimeoutType* timeoutType = nullptr, uint32_t* timeoutMs = nullptr);
/**
* Perform a regular send operation using Linux iotcl. This is public so it can be used
* in the user callback if special handling is only necessary for certain commands.
* @param spiCookie
* @param sendData
* @param sendLen
* @return
*/
ReturnValue_t performRegularSendOperation(SpiCookie* spiCookie, const uint8_t *sendData,
size_t sendLen);
GpioIF* getGpioInterface();
void setSpiSpeedAndMode(int spiFd, spi::SpiModes mode, uint32_t speed);
void performSpiWiretapping(SpiCookie* spiCookie);
private:
struct SpiInstance {
std::vector<uint8_t> replyBuffer;
};
GpioIF* gpioComIF = nullptr;
MutexIF* spiMutex = nullptr;
MutexIF::TimeoutType timeoutType = MutexIF::TimeoutType::WAITING;
uint32_t timeoutMs = 20;
using SpiDeviceMap = std::unordered_map<address_t, SpiInstance>;
using SpiDeviceMapIter = SpiDeviceMap::iterator;
SpiDeviceMap spiDeviceMap;
ReturnValue_t performHalfDuplexReception(SpiCookie* spiCookie);
ReturnValue_t getReadBuffer(address_t spiAddress, uint8_t** buffer);
};
#endif /* LINUX_SPI_SPICOMIF_H_ */