Need help for STM32F103ZGT6 in Keil. Have reset problems. Please help.

You don't need a scatter file for variables placed at absolute addresses.

You can use a scatter file for forcing placing of things, but you then use some naming scheme to match the code or variables in your program to the relevant zones specified in the scatter file.

Another thing - depending on what memory regions you use and if you want the data initialized before reaching main(), you may have to adjust the startup file to make sure that the specific memory regions are powered up and enabled. So if using memory areas in external memory, then the startup file must get the memory controller configuration for that external RAM. If using RAM located in a peripherial device, that peripherial may need to be powered up so the RAM block is powered up and accessible.

In your case, you have a rule for .ANY (+ZI) for RW_IRAM1. What would match your rule in EXT_RAM2?

You don't need a scatter file for variables placed at absolute addresses.

You can use a scatter file for forcing placing of things, but you then use some naming scheme to match the code or variables in your program to the relevant zones specified in the scatter file.

Another thing - depending on what memory regions you use and if you want the data initialized before reaching main(), you may have to adjust the startup file to make sure that the specific memory regions are powered up and enabled. So if using memory areas in external memory, then the startup file must get the memory controller configuration for that external RAM. If using RAM located in a peripherial device, that peripherial may need to be powered up so the RAM block is powered up and accessible.

In your case, you have a rule for .ANY (+ZI) for RW_IRAM1. What would match your rule in EXT_RAM2?

If you look a the two examples you see they tell you how to set up the hardware and the Keil enviroment to use an external SRAM

SRAM This example provides a basic example of how to use the FSMC firmware library and an associate driver to perform read/write operations on the IS61WV51216BLL SRAM memory mounted on STM3210E-EVAL board.

SRAM DataMemory This example shows how to use the external SRAM mounted on STM3210E-EVAL or
STM32100E-EVAL board as program data memory and internal SRAM for Stack.

In each of the example directories there is a readme file listing the steps.

I dont work with the STM32F10X family on a day to day basis so am not really able to advise you much more than to point you at ST provided examples set up for the Keil Tools.

Sorry

Hmm,

I am quite confused about these settings.

In STM32 there is a Memory Space "FSMC bank1 & bank2", which is located at location 0x60000000 till 0x6FFFFFFF. As the SRAM size of STM32103FZGT6 is 96K, I feel, I need more RAM to store the Display Data, which is in "GuiLib_DisplayBuf[][]" of size 261120 bytes.

Frankly telling, I dont have much idea of Scatter File.

I just want a solution for allocating the variable "GuiLib_DisplayBuf[][]" to FSMC bank location of STM32. During declaration of "GuiLib_DisplayBuf[][]" as below I have allocated it to 0x60020000.

typedef union
{
        GuiConst_INT8U  Bytes[GuiConst_BYTE_LINES][GuiConst_BYTES_PR_LINE];
        GuiConst_INT16U Words[GuiConst_BYTE_LINES][GuiConst_BYTES_PR_LINE/ 2];
} DisplayBufUnion;
extern DisplayBufUnion GuiLib_DisplayBuf __attribute__((at(0x60020000)));

After doing this, i am getting a warning

.\ST\stm32_testprojekt.sct(19): warning: L6314W: No section matches pattern *(ZI).

with build details

Program Size: Code=46242 RO-data=38542 RW-data=316 ZI-data=408852

I dont know exactly, what is this ZI.

Now, I want to know what changes should be done in scatter file or any other file.

Rgds
Shankar

No. It isn't your line:

extern DisplayBufUnion GuiLib_DisplayBuf __attribute__((at(0x60020000)));

that is generating the warning.

It's your change to the scatter file that is generating the warning.

ZI, by the way, stands for zero-initialized variables.

Why do you manually create a scatter file, unless you use any features that requiers a scatter file? If you use your "at" declaration in the code, and add the address range of your external RAM in the project settings, you can ignore that scatter file.

But whatever you do, you must make sure that the startup file configures the memory controller for that external RAM range.

This example shows how to use the external SRAM mounted on STM3210E-EVAL or
STM32100E-EVAL board as program data memory and internal SRAM for Stack.
This example doesn't use the default library startup files. Use the EWARM, MDK-ARM,
HiTOP, RIDE or TrueSTUDIO startup files provided within this folder.

• MDK-ARM - in Project->Options for Target window, select 'RAM1'and enter 0x68000000 as start address with size of 0x100000 (IRAM1 must be un-checked) - uncomment "#define DATA_IN_ExtSRAM " in the "system_stm32f10x.c" file

/**********************/
Just a quick point - remember I was swagging it and havent a scoobie about your hardware!

Does the display have built in display RAM ? - Do you have the commands to read/write to the display RAM ? ( if this is the case you just set up the micro as standalone and set up the FSMC to drive the display - loads of examples of that.

If your using emWin and a display they support check the Keil boards examples to see what needs to be done.

I doubt its the compiler version that needs to changed just getting the right hardware config etc

Hello,

Thank you very much to all of you.

Thanks a lot for your valuable time. I will work a little bit and learn it properly in the Documents referred by you..

If any further doubts, will post my comments here..

Thanks
Shankar