spi com if almost finished

linux/spi/SpiComIF.h

@@ -0,0 +1,61 @@
+#ifndef LINUX_SPI_SPICOMIF_H_
+#define LINUX_SPI_SPICOMIF_H_
+
+#include <fsfw/devicehandlers/DeviceCommunicationIF.h>
+#include <fsfw/objectmanager/SystemObject.h>
+#include <linux/gpio/GpioIF.h>
+
+#include <vector>
+#include <unordered_map>
+
+/**
+ * @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:
+    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;
+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;
+
+    /**
+     * @brief   This function opens an SPI device and binds the opened file
+     *          to a specific SPI address.
+     * @param deviceFile    The name of the device file. E.g. spi-0
+     * @param i2cAddress    The address of the SPI slave device.
+     * @param fileDescriptor    Pointer to device descriptor.
+     * @return  RETURN_OK if successful, otherwise RETURN_FAILED.
+     */
+    ReturnValue_t openDevice(std::string deviceFile, int* fileDescriptor, bool nonBlocking = false);
+
+    ReturnValue_t getReadBuffer(address_t spiAddress, uint8_t** buffer);
+};
+
+
+
+#endif /* LINUX_SPI_SPICOMIF_H_ */