Updates for SPI

1. Better names for functions
2. Reply size is set to 0

hal/src/fsfw_hal/linux/spi/SpiComIF.cpp

@@ -15,11 +15,6 @@
 #include <cerrno>
 #include <cstring>
 
-/* Can be used for low-level debugging of the SPI bus */
-#ifndef FSFW_HAL_LINUX_SPI_WIRETAPPING
-#define FSFW_HAL_LINUX_SPI_WIRETAPPING                  0
-#endif
-
 SpiComIF::SpiComIF(object_id_t objectId, GpioIF* gpioComIF):
         SystemObject(objectId), gpioComIF(gpioComIF) {
     if(gpioComIF == nullptr) {
@@ -193,7 +188,7 @@ ReturnValue_t SpiComIF::performRegularSendOperation(SpiCookie *spiCookie, const
     spiCookie->getSpiParameters(spiMode, spiSpeed, nullptr);
     setSpiSpeedAndMode(fileDescriptor, spiMode, spiSpeed);
     spiCookie->assignWriteBuffer(sendData);
-    spiCookie->assignTransferSize(sendLen);
+    spiCookie->setTransferSize(sendLen);
 
     bool fullDuplex = spiCookie->isFullDuplex();
     gpioId_t gpioId = spiCookie->getChipSelectPin();
@@ -202,12 +197,26 @@ ReturnValue_t SpiComIF::performRegularSendOperation(SpiCookie *spiCookie, const
     if(gpioId != gpio::NO_GPIO) {
         result = spiMutex->lockMutex(timeoutType, timeoutMs);
         if (result != RETURN_OK) {
+#if FSFW_VERBOSE_LEVEL >= 1
 #if FSFW_CPP_OSTREAM_ENABLED == 1
             sif::error << "SpiComIF::sendMessage: Failed to lock mutex" << std::endl;
+#else
+            sif::printError("SpiComIF::sendMessage: Failed to lock mutex\n");
+#endif
+#endif
+            return result;
+        }
+        ReturnValue_t result = gpioComIF->pullLow(gpioId);
+        if(result != HasReturnvaluesIF::RETURN_OK) {
+#if FSFW_VERBOSE_LEVEL >= 1
+#if FSFW_CPP_OSTREAM_ENABLED == 1
+            sif::warning << "SpiComIF::sendMessage: Pulling low CS pin failed" << std::endl;
+#else
+            sif::printWarning("SpiComIF::sendMessage: Pulling low CS pin failed");
+#endif
 #endif
             return result;
         }
-        gpioComIF->pullLow(gpioId);
     }
 
     /* Execute transfer */
@@ -218,7 +227,7 @@ ReturnValue_t SpiComIF::performRegularSendOperation(SpiCookie *spiCookie, const
             utility::handleIoctlError("SpiComIF::sendMessage: ioctl error.");
             result = FULL_DUPLEX_TRANSFER_FAILED;
         }
-#if FSFW_HAL_LINUX_SPI_WIRETAPPING == 1
+#if FSFW_HAL_SPI_WIRETAPPING == 1
         performSpiWiretapping(spiCookie);
 #endif /* FSFW_LINUX_SPI_WIRETAPPING == 1 */
     }
@@ -335,6 +344,7 @@ ReturnValue_t SpiComIF::readReceivedMessage(CookieIF *cookie, uint8_t **buffer,
 
     *buffer = rxBuf;
     *size = spiCookie->getCurrentTransferSize();
+    spiCookie->setTransferSize(0);
     return HasReturnvaluesIF::RETURN_OK;
 }
 
@@ -388,11 +398,11 @@ GpioIF* SpiComIF::getGpioInterface() {
 void SpiComIF::setSpiSpeedAndMode(int spiFd, spi::SpiModes mode, uint32_t speed) {
     int retval = ioctl(spiFd, SPI_IOC_WR_MODE, reinterpret_cast<uint8_t*>(&mode));
     if(retval != 0) {
-        utility::handleIoctlError("SpiTestClass::performRm3100Test: Setting SPI mode failed!");
+        utility::handleIoctlError("SpiComIF::setSpiSpeedAndMode: Setting SPI mode failed");
     }
 
     retval = ioctl(spiFd, SPI_IOC_WR_MAX_SPEED_HZ, &speed);
     if(retval != 0) {
-        utility::handleIoctlError("SpiTestClass::performRm3100Test: Setting SPI speed failed!");
+        utility::handleIoctlError("SpiComIF::setSpiSpeedAndMode: Setting SPI speed failed");
     }
 }

hal/src/fsfw_hal/linux/spi/SpiComIF.h

@@ -1,6 +1,7 @@
 #ifndef LINUX_SPI_SPICOMIF_H_
 #define LINUX_SPI_SPICOMIF_H_
 
+#include "fsfw/FSFW.h"
 #include "spiDefinitions.h"
 #include "returnvalues/classIds.h"
 #include "fsfw_hal/common/gpio/GpioIF.h"

hal/src/fsfw_hal/linux/spi/SpiCookie.cpp

@@ -121,7 +121,7 @@ bool SpiCookie::isFullDuplex() const {
     return not this->halfDuplex;
 }
 
-void SpiCookie::assignTransferSize(size_t transferSize) {
+void SpiCookie::setTransferSize(size_t transferSize) {
     spiTransferStruct.len = transferSize;
 }
 

hal/src/fsfw_hal/linux/spi/SpiCookie.h

@@ -103,10 +103,10 @@ public:
     void assignReadBuffer(uint8_t* rx);
     void assignWriteBuffer(const uint8_t* tx);
     /**
-     * Assign size for the next transfer.
+     * Set size for the next transfer. Set to 0 for no transfer
      * @param transferSize
      */
-    void assignTransferSize(size_t transferSize);
+    void setTransferSize(size_t transferSize);
     size_t getCurrentTransferSize() const;
 
     struct UncommonParameters {
@@ -158,8 +158,6 @@ private:
             std::string spiDev, const size_t maxSize, spi::SpiModes spiMode, uint32_t spiSpeed,
             spi::send_callback_function_t callback, void* args);
 
-    size_t currentTransferSize = 0;
-
     address_t spiAddress;
     gpioId_t chipSelectPin;
     std::string spiDevice;