add i2c fatal error counter

linux/devices/ImtqPollingTask.cpp

@@ -10,7 +10,9 @@
 
 #include "fsfw/FSFW.h"
 
-ImtqPollingTask::ImtqPollingTask(object_id_t imtqPollingTask) : SystemObject(imtqPollingTask) {
+ImtqPollingTask::ImtqPollingTask(object_id_t imtqPollingTask,
+    std::atomic_uint16_t& i2cFatalErrors): SystemObject(imtqPollingTask),
+    i2cFatalErrors(i2cFatalErrors) {
   semaphore = SemaphoreFactory::instance()->createBinarySemaphore();
   semaphore->acquire();
   ipcLock = MutexFactory::instance()->createMutex();
@@ -427,12 +429,20 @@ ReturnValue_t ImtqPollingTask::performI2cFullRequest(uint8_t* reply, size_t repl
     if (ioctl(fd, I2C_SLAVE, i2cAddr) < 0) {
       sif::warning << "Opening IMTQ slave device failed with code " << errno << ": "
                    << strerror(errno) << std::endl;
+      if(errno == EBUSY) {
+        i2cFatalErrors++;
+      }
     }
 
     int written = write(fd, cmdBuf.data(), cmdLen);
     if (written < 0) {
       sif::error << "IMTQ: Failed to send with error code " << errno
                  << ". Error description: " << strerror(errno) << std::endl;
+      // This is a weird issue which sometimes occurs on debug builds. All I2C buses are busy
+      // for all writes,
+      if(errno == EBUSY) {
+        i2cFatalErrors++;
+      }
       return returnvalue::FAILED;
     } else if (static_cast<size_t>(written) != cmdLen) {
       sif::error << "IMTQ: Could not write all bytes" << std::endl;

linux/devices/ImtqPollingTask.h

@@ -8,12 +8,13 @@
 #include "fsfw/objectmanager/SystemObject.h"
 #include "fsfw/tasks/ExecutableObjectIF.h"
 #include "mission/devices/devicedefinitions/imtqHelpers.h"
+#include <atomic>
 
 class ImtqPollingTask : public SystemObject,
                         public ExecutableObjectIF,
                         public DeviceCommunicationIF {
  public:
-  ImtqPollingTask(object_id_t imtqPollingTask);
+  ImtqPollingTask(object_id_t imtqPollingTask, std::atomic_uint16_t& i2cFatalErrors);
 
   ReturnValue_t performOperation(uint8_t operationCode) override;
   ReturnValue_t initialize() override;
@@ -28,6 +29,7 @@ class ImtqPollingTask : public SystemObject,
   ReturnValue_t comStatus = returnvalue::OK;
   MutexIF* ipcLock;
   MutexIF* bufLock;
+  std::atomic_uint16_t& i2cFatalErrors;
   I2cCookie* i2cCookie = nullptr;
   const char* i2cDev = nullptr;
   address_t i2cAddr = 0;