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I am trying to update the STM32L486 files so that I can utilize the RAM2 section of RAM, and I’m real close, but I can’t quite figure out what I’m missing for the memory map. It’s showing the same data in two separate sections and I can’t figure out why.
- I have updated the linker file and added a section that writes to RAM2 instead of RAM.
- I have updated the code to apply the necessary attribute to the appropriate variables
- I modified the startup assembly code to wipe RAM2 section like it does for the .bss section
- I updated the stm32.xml file to display RAM2 properties.
- The .map file confirms things are located at the correct addresses
- The code runs and works correctly.
- Using the debugger I have confirmed that the variables are located in the correction memory location
- The VisualGDB Embedded Memory Explorer shows the new RAM sector and allocates the appropriate items to it
The only thing not working:
The RAM2 section information ALSO shows up in the RAM1 information when using VisualGDBs Memory Explorer.
I have attached an image showing the memory explorer.
I have attached my modified stm32.xml file to manually add a RAM2 section.——————————————————————————————–
Here is the relevant section of my .map file that shows the address of .rm2data is where I think it is
*(COMMON) 0x20012aac . = ALIGN (0x4) 0x20012aac _ebss = . 0x20012aac __bss_end__ = _ebss ._user_heap_stack 0x20012aac 0x604 load address 0x0805f960 0x20012ab0 . = ALIGN (0x8) *fill* 0x20012aac 0x4 0x20012ab0 PROVIDE (end = .) [!provide] PROVIDE (_end = .) 0x20012cb0 . = (. + _Min_Heap_Size) *fill* 0x20012ab0 0x200 0x200130b0 . = (. + _Min_Stack_Size) *fill* 0x20012cb0 0x400 0x200130b0 . = ALIGN (0x8) 0x200130b0 _sirm2data = LOADADDR (.rm2data) .rm2data 0x10000000 0x3d30 load address 0x200130b0 0x10000000 . = ALIGN (0x8) 0x10000000 _srm2data = . *(.rm2data) .rm2data 0x10000000 0x145c Debug/usbd_composite.o 0x10000000 USBD_CDC_CfgHSDesc 0x10000114 USBD_CDC_CfgFSDesc 0x10000228 USBD_CDC_OtherSpeedCfgDesc .rm2data 0x1000145c 0x200 Debug/usbd_composite_desc.o 0x1000145c USBD_StrDesc .rm2data 0x1000165c 0x22d0 Debug/usbUtils.o .rm2data 0x1000392c 0x400 Debug/svcShellStorageMgr.o *(.rm2data*) 0x10003d30 . = ALIGN (0x8) *fill* 0x10003d2c 0x4 0x10003d30 _erm2data = . -------------------------------------------------------------------------------------------- Here is the relevant section of my linker in case I'm missing something/* User_heap_stack section, used to check that there is enough RAM left */ ._user_heap_stack : { . = ALIGN(8); PROVIDE ( end = . ); PROVIDE ( _end = . ); . = . + _Min_Heap_Size; . = . + _Min_Stack_Size; . = ALIGN(8); } >RAM /* used by the startup to initialize ram2 data */ _sirm2data = LOADADDR(.rm2data); .rm2data : { . = ALIGN(8); _srm2data = .; /* create a global symbol at data start */ *(.rm2data) /* .data sections */ *(.rm2data*) /* .data* sections */ . = ALIGN(8); _erm2data = .; /* define a global symbol at data end */ } >RAM2 AT> RAMAny ideas of why the Embedded Memory Explorer is duplicating the information?
Thanks!
Well, I apparently can’t upload .xml files, so here it is
<?xml version="1.0"?> <EmbeddedProfile xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <ToolchainID>com.visualgdb.arm-eabi</ToolchainID> <ToolchainVersion> <GCC>10.3.1</GCC> <GDB>10.2.90</GDB> <Revision>1</Revision> </ToolchainVersion> <BspID>com.visualgdb.bsp.in-place</BspID> <BspVersion>1.0</BspVersion> <McuID>STM32L486QC</McuID> <MCUDefinitionFile>stm32l486xx.xml</MCUDefinitionFile> <MCUProperties> <Entries /> </MCUProperties> <BSPSourceFolderName>Device-specific files</BSPSourceFolderName> <InPlaceMCU> <ID>STM32L486QC</ID> <UserFriendlyName>STM32L486QC</UserFriendlyName> <CompilationFlags> <PreprocessorMacros> <string>SYS_NAME=$(SYS_NAME)</string> <string>RUNNING_FREE_RTOS</string> <string>USE_CUBEMX_USB</string> <string>STM32L486QC</string> <string>STM32L486xx</string> <string>ARM_MATH_CM4</string> <string>__CORTEX_M4__</string> <string>REV3</string> </PreprocessorMacros> <IncludeDirectories> <string>../../../STM32_FrameworksL4/Drivers/CMSIS/Device/ST/STM32L4xx/Include</string> <string>../../../STM32_FrameworksL4/Drivers/STM32L4xx_HAL_Driver/Inc</string> <string>../../../STM32_FrameworksL4/Drivers/STM32L4xx_HAL_Driver/Inc/Legacy</string> <string>../../../STM32_FrameworksL4/Middlewares/Third_Party/FreeRTOS/Source/CMSIS_RTOS_V2</string> <string>../../../STM32_FrameworksL4/Middlewares/Third_Party/FreeRTOS/Source/include</string> <string>../../../STM32_FrameworksL4/Middlewares/Third_Party/FreeRTOS/Source/portable/GCC/ARM_CM7/r0p1</string> <string>../../../STM32_FrameworksL4/Middlewares/ST/STM32_USB_Device_Library/Core/Inc</string> <string>../../../STM32_FrameworksL4/Drivers/CMSIS/Include</string> <string>../../../CryptoV3.1.3/AccHw_Crypto/STM32L4/Middlewares/ST/STM32_Crypto/Inc</string> <string>../../../PtxComps</string> <string>../../../PtxComps/Services</string> <string>../../../PtxComps/ControlComps</string> <string>../../../PtxComps/Utils</string> <string>../../../PtxComps/HwComps</string> <string>../../../PtxComps/HwDrivers</string> <string>../../../PtxComps/Tasks</string> <string>../../../PtxComps/Init</string> <string>../../../PtxComps/ThirdParty/include</string> <string>../../../PtxComps/ThirdParty/littlefs-2.4.2</string> <string>../../../PtxComps/Utils</string> <string>../../../PtxComps/USB</string> <string>../../../PtxComps/USB/Composite</string> <string>../../../PtxComps/USB/RNDIS</string> <string>../../../PtxComps/Utils/Crypto</string> <string>../../CubeMXRev3/Inc</string> <string>../../Code</string> </IncludeDirectories> <CFLAGS>-Wall -Wextra -Wno-unknown-pragmas -Wno-unused-parameter -ffunction-sections -fdata-sections</CFLAGS> <CXXFLAGS>-Wall -Wextra -Wno-unknown-pragmas -Wno-unused-parameter -ffunction-sections -fdata-sections</CXXFLAGS> <LDFLAGS>--specs=nano.specs --specs=nosys.specs</LDFLAGS> <ASFLAGS>-Wall -Wextra -Wno-unknown-pragmas -Wno-unused-parameter -ffunction-sections -fdata-sections</ASFLAGS> <LinkerScript>../../CubeMXRev3/STM32L486QGIx_FLASH_APP.ld</LinkerScript> <COMMONFLAGS>-mcpu=cortex-m4 -mthumb -mfpu=fpv4-sp-d16 -mfloat-abi=hard</COMMONFLAGS> <EnableLinkerGroups>true</EnableLinkerGroups> </CompilationFlags> <AdditionalSourceFiles /> <AdditionalHeaderFiles /> <MemoryMap> <Memories> <MCUMemory> <Name>FLASH</Name> <Address>134217728</Address> <Size>1048576</Size> <AddressSpaceSize>0</AddressSpaceSize> <Flags>IsDefaultFLASH</Flags> </MCUMemory> <MCUMemory> <Name>RAM</Name> <Address>536870912</Address> <Size>98304</Size> <AddressSpaceSize>0</AddressSpaceSize> <Flags>None</Flags> </MCUMemory> <MCUMemory> <Name>RAM2</Name> <Address>268435456</Address> <Size>32768</Size> <AddressSpaceSize>0</AddressSpaceSize> <Flags>None</Flags> </MCUMemory> </Memories> </MemoryMap> <AdditionalSystemVars> <SysVarEntry> <Key>com.sysprogs.bspoptions.arm.core</Key> <Value>M4</Value> </SysVarEntry> <SysVarEntry> <Key>com.sysprogs.stm32.hal_header_prefix</Key> <Value>stm32l4xx</Value> </SysVarEntry> <SysVarEntry> <Key>com.sysprogs.bspoptions.stm32.hal_system_file</Key> <Value>STM32L4xxxx/CMSIS_HAL/Device/ST/STM32L4xx/Source/Templates/system_stm32l4xx.c</Value> </SysVarEntry> <SysVarEntry> <Key>com.sysprogs.bspoptions.stm32.hal_config_template_file</Key> <Value>STM32L4xxxx/STM32L4xx_HAL_Driver/Inc/STM32L4xx_hal_conf_template.h</Value> </SysVarEntry> <SysVarEntry> <Key>com.sysprogs.stm32.hal_device_family</Key> <Value>STM32L486xx</Value> </SysVarEntry> </AdditionalSystemVars> <ConfigurableProperties> <PropertyGroups> <PropertyGroup> <Properties> <PropertyEntry xsi:type="Enumerated"> <Name>Execute from</Name> <UniqueID>com.sysprogs.bspoptions.primary_memory</UniqueID> <OmitPrefixIfEmpty>false</OmitPrefixIfEmpty> <SuggestionList> <Suggestion> <UserFriendlyName>FLASH</UserFriendlyName> <InternalValue>flash</InternalValue> </Suggestion> <Suggestion> <UserFriendlyName>SRAM</UserFriendlyName> <InternalValue>sram</InternalValue> </Suggestion> </SuggestionList> <DefaultEntryIndex>0</DefaultEntryIndex> <AllowFreeEntry>false</AllowFreeEntry> </PropertyEntry> <PropertyEntry xsi:type="Enumerated"> <Name>Floating point support</Name> <UniqueID>com.sysprogs.bspoptions.arm.floatmode</UniqueID> <OmitPrefixIfEmpty>false</OmitPrefixIfEmpty> <SuggestionList> <Suggestion> <UserFriendlyName>Software</UserFriendlyName> <InternalValue>-mfloat-abi=soft</InternalValue> </Suggestion> <Suggestion> <UserFriendlyName>Hardware</UserFriendlyName> <InternalValue>-mfloat-abi=hard</InternalValue> </Suggestion> <Suggestion> <UserFriendlyName>Unspecified</UserFriendlyName> <InternalValue /> </Suggestion> </SuggestionList> <DefaultEntryIndex>0</DefaultEntryIndex> <AllowFreeEntry>false</AllowFreeEntry> </PropertyEntry> <PropertyEntry xsi:type="Boolean"> <Name>Exclude the startup file from project</Name> <UniqueID>com.sysprogs.mcuoptions.ignore_startup_file</UniqueID> <OmitPrefixIfEmpty>false</OmitPrefixIfEmpty> <DefaultValue>false</DefaultValue> <ValueForTrue>1</ValueForTrue> </PropertyEntry> <PropertyEntry xsi:type="Enumerated"> <Name>C Library Type</Name> <UniqueID>com.sysprogs.toolchainoptions.arm.libctype</UniqueID> <OmitPrefixIfEmpty>false</OmitPrefixIfEmpty> <SuggestionList> <Suggestion> <UserFriendlyName>Default</UserFriendlyName> <InternalValue /> </Suggestion> <Suggestion> <UserFriendlyName>Newlib-nano</UserFriendlyName> <InternalValue>--specs=nano.specs</InternalValue> </Suggestion> <Suggestion> <UserFriendlyName>Newlib-nano with floating point support in printf()</UserFriendlyName> <InternalValue>--specs=nano.specs -u _printf_float</InternalValue> </Suggestion> <Suggestion> <UserFriendlyName>Newlib-nano with floating point support in printf() and scanf()</UserFriendlyName> <InternalValue>--specs=nano.specs -u _printf_float -u _scanf_float</InternalValue> </Suggestion> </SuggestionList> <DefaultEntryIndex>1</DefaultEntryIndex> <AllowFreeEntry>false</AllowFreeEntry> </PropertyEntry> <PropertyEntry xsi:type="Enumerated"> <Name>Implementations for _sbrk(), etc.</Name> <UniqueID>com.sysprogs.toolchainoptions.arm.libnosys</UniqueID> <OmitPrefixIfEmpty>false</OmitPrefixIfEmpty> <SuggestionList> <Suggestion> <UserFriendlyName>None</UserFriendlyName> <InternalValue /> </Suggestion> <Suggestion> <UserFriendlyName>Minimal (no semihosting)</UserFriendlyName> <InternalValue>--specs=nosys.specs</InternalValue> </Suggestion> <Suggestion> <UserFriendlyName>Support semihosting</UserFriendlyName> <InternalValue>--specs=rdimon.specs</InternalValue> </Suggestion> </SuggestionList> <DefaultEntryIndex>1</DefaultEntryIndex> <AllowFreeEntry>false</AllowFreeEntry> </PropertyEntry> </Properties> <CollapsedByDefault>false</CollapsedByDefault> </PropertyGroup> </PropertyGroups> </ConfigurableProperties> <HierarchicalPath>STM32\STM32L4</HierarchicalPath> <FamilyID>STM32L4</FamilyID> <FLASHSize>1048576</FLASHSize> <FLASHBase>134217728</FLASHBase> <RAMBase>536870912</RAMBase> <RAMSize>98304</RAMSize> <RAM2Base>268435456</RAM2Base> <RAM2Size>32768</RAM2Size> <MCUDefinitionFile>stm32l486xx.xml</MCUDefinitionFile> <AdditionalSourcesRequiredForTesting>false</AdditionalSourcesRequiredForTesting> </InPlaceMCU> <MCUMakFile>stm32.mak</MCUMakFile> <ReferencedFrameworks /> <FrameworkProperties> <Entries> <KeyValue> <Key>com.sysprogs.bspoptions.stm32.ll_driver</Key> <Value /> </KeyValue> </Entries> </FrameworkProperties> <TestFrameworkProperties> <Entries /> </TestFrameworkProperties> </EmbeddedProfile>
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