Corrected bug in EDBG driver memory access routines. It was incorrectly using the FUSES memory type when in debug mode (that memory type isn't available in debug mode, only program mode. Was causing a target reset).

src/DebugToolDrivers/Microchip/Protocols/EDBG/AVR/EdbgAvr8Interface.cpp

@@ -720,7 +720,20 @@ namespace DebugToolDrivers::Microchip::Protocols::Edbg::Avr
             return this->readMemory(Avr8MemoryType::EEPROM, startAddress, bytes, excludedAddresses);
         }
 
-        if (memorySegmentDescriptor.type == TargetMemorySegmentType::FUSES) {
+        if (
+            memorySegmentDescriptor.type == TargetMemorySegmentType::FUSES
+            && this->programmingModeEnabled
+            && this->session.configVariant != Avr8ConfigVariant::DEBUG_WIRE
+        ) {
+            if (this->session.configVariant == Avr8ConfigVariant::XMEGA) {
+                return this->readMemory(
+                    Avr8MemoryType::FUSES,
+                    startAddress - this->session.fuseMemorySegment.startAddress,
+                    bytes,
+                    excludedAddresses
+                );
+            }
+
             return this->readMemory(Avr8MemoryType::FUSES, startAddress, bytes, excludedAddresses);
         }
 
@@ -790,7 +803,20 @@ namespace DebugToolDrivers::Microchip::Protocols::Edbg::Avr
             return this->writeMemory(Avr8MemoryType::EEPROM, startAddress, buffer);
         }
 
-        if (memorySegmentDescriptor.type == TargetMemorySegmentType::FUSES) {
+        if (
+            memorySegmentDescriptor.type == TargetMemorySegmentType::FUSES
+            && this->programmingModeEnabled
+            && this->session.configVariant != Avr8ConfigVariant::DEBUG_WIRE
+        ) {
+            if (this->session.configVariant == Avr8ConfigVariant::XMEGA) {
+                // Fuse addresses should be in relative form, for XMEGA (PDI) targets
+                return this->writeMemory(
+                    Avr8MemoryType::FUSES,
+                    startAddress - this->session.fuseMemorySegment.startAddress,
+                    buffer
+                );
+            }
+
             return this->writeMemory(Avr8MemoryType::FUSES, startAddress, buffer);
         }
 

src/DebugToolDrivers/Microchip/Protocols/EDBG/AVR/EdbgAvr8Session.cpp

@@ -22,6 +22,7 @@ namespace DebugToolDrivers::Microchip::Protocols::Edbg::Avr
         , ramMemorySegment(this->targetDescriptionFile.getRamMemorySegment())
         , eepromMemorySegment(this->targetDescriptionFile.getEepromMemorySegment())
         , ioMemorySegment(this->targetDescriptionFile.getIoMemorySegment())
+        , fuseMemorySegment(this->targetDescriptionFile.getFuseMemorySegment())
         , signatureMemorySegment(this->targetDescriptionFile.getSignatureMemorySegment())
         , programAppSection(this->programMemorySegment.tryGetSection("app_section"))
         , programBootSection(this->programMemorySegment.tryGetSection("boot_section"))

src/DebugToolDrivers/Microchip/Protocols/EDBG/AVR/EdbgAvr8Session.hpp

@@ -47,6 +47,7 @@ namespace DebugToolDrivers::Microchip::Protocols::Edbg::Avr
         const Targets::TargetDescription::MemorySegment& ramMemorySegment;
         const Targets::TargetDescription::MemorySegment& eepromMemorySegment;
         const Targets::TargetDescription::MemorySegment& ioMemorySegment;
+        const Targets::TargetDescription::MemorySegment& fuseMemorySegment;
         const Targets::TargetDescription::MemorySegment& signatureMemorySegment;
 
         const std::optional<