src/fsfw/devicehandlers/DeviceHandlerBase.cpp

@@ -665,6 +665,11 @@ void DeviceHandlerBase::doGetWrite() {
 void DeviceHandlerBase::doSendRead() {
   ReturnValue_t result;
 
+  result = doSendReadHook();
+  if (result != RETURN_OK) {
+    return;
+  }
+
   size_t replyLen = 0;
   if (cookieInfo.pendingCommand != deviceCommandMap.end()) {
     replyLen = getNextReplyLength(cookieInfo.pendingCommand->first);
@@ -920,6 +925,8 @@ void DeviceHandlerBase::commandSwitch(ReturnValue_t onOff) {
   }
 }
 
+ReturnValue_t DeviceHandlerBase::doSendReadHook() { return RETURN_OK; }
+
 ReturnValue_t DeviceHandlerBase::getSwitches(const uint8_t** switches, uint8_t* numberOfSwitches) {
   return DeviceHandlerBase::NO_SWITCH;
 }

src/fsfw/devicehandlers/DeviceHandlerBase.h

@@ -1082,6 +1082,12 @@ class DeviceHandlerBase : public DeviceHandlerIF,
    */
   void commandSwitch(ReturnValue_t onOff);
 
+  /**
+   * @brief   This function can be used to insert device specific code during the do-send-read
+   *          step.
+   */
+  virtual ReturnValue_t doSendReadHook();
+
  private:
   /**
    * State a cookie is in.