Loading application code on on chip ROM

Arunabha Deb

Other Parts Discussed in Thread: TMS320C5515

/**********************************************************/

/*                                                        */

/*         LINKER command file for LEAD3 memory map       */

/*                                                        */

/**********************************************************/



 

MEMORY

{

    PAGE 0:



        MMR     : origin = 0000000h, length = 00000c0h 

        SPRAM   : origin = 00000c0h, length = 0000040

        DARAM0  : origin = 0000100h, length = 0003F00h

        DARAM1  : origin = 0004000h, length = 0004000h

        DARAM2  : origin = 0008000h, length = 0004000h

        DARAM3  : origin = 000c000h, length = 0004000h



        SARAM0  : origin = 0010000h, length = 0004000h

        SARAM1  : origin = 0014000h, length = 0004000h

        SARAM2  : origin = 0018000h, length = 0004000h

        SARAM3  : origin = 001c000h, length = 0004000h

        SARAM4  : origin = 0020000h, length = 0004000h

        SARAM5  : origin = 0024000h, length = 0004000h

        SARAM6  : origin = 0028000h, length = 0004000h

        SARAM7  : origin = 002c000h, length = 0004000h

        SARAM8  : origin = 0030000h, length = 0004000h

        SARAM9  : origin = 0034000h, length = 0004000h

        SARAM10 : origin = 0038000h, length = 0004000h

        SARAM11 : origin = 003c000h, length = 0004000h

        SARAM12 : origin = 0040000h, length = 0004000h

        SARAM13 : origin = 0044000h, length = 0004000h

        SARAM14 : origin = 0048000h, length = 0004000h

        SARAM15 : origin = 004c000h, length = 0004000h



        CE0     : origin = 0050000h, length = 03b0000h 

        CE1     : origin = 0400000h, length = 0400000h

        CE2     : origin = 0800000h, length = 0400000h

        CE3     : origin = 0c00000h, length = 03f8000h



        PDROM   : origin = 0ff8000h, length = 07f00h

        VECS    : origin = 0ffff00h, length = 00100h  /* reset vector */

}	



 

SECTIONS

{

        vectors  : {} > VECS   PAGE 0         /* interrupt vector table */

        .cinit   : {} > SARAM0 PAGE 0

        .text     >> PDROM 

        isrs     : {} > SARAM2 PAGE 0



        .stack   : {} > DARAM0 PAGE 0

        .sysstack: {} > DARAM0 PAGE 0

        .sysmem  : {} > DARAM1 PAGE 0

        .data    : {} > DARAM1 PAGE 0

        .bss     : {} > DARAM1 PAGE 0

        .const   : {} > DARAM1 PAGE 0



        .coeffs  : {} > DARAM2 PAGE 0

        .dbuffer : {} > DARAM3 PAGE 0

        files    : {} > DARAM2 PAGE 0         /* User-defined sections */

        statvar  : {} > DARAM2 PAGE 0

        statarry : {} > DARAM2 PAGE 0

        tempvar  : {} > DARAM2 PAGE 0

        temparry : {} > DARAM2 PAGE 0

}

Everyone

I am working with TMS320c5515 ezdsp usbstick board.I want to load my code on onchip rom such that upon reset my application code should run instead of USB_stick_sample code which is preloaded with the board.I tried to edit the .text section of linker file with PDROM but my ccs4 is showing error.I dnt know really how can i run my application code upon reset.i dnt want to use any external memory for my application code as it is quite small in size.Please anyone help me with this.

I have attached my linker file below.

With regards

Arun

over 11 years ago

0 Steve Tsang over 11 years ago

TI__Mastermind 23785 points

1. "ROM" stands for Read Only Memory which means that you can only READ from it.

2. The on-chip ROM contains the bootloader code and one of its function is to load application code from supported peripherals. Refer to Bootloader Application Report on how it works: http://www.ti.com/general/docs/lit/getliterature.tsp?baseLiteratureNumber=sprabd7&fileType=pdf

3. You can erase the pre-loaded demo code. Refer to this C5515 Boot-Image Programmer page for detials: http://processors.wiki.ti.com/index.php/C5515_Boot-Image_Programmer

4. There are many C5515 related documentations on C5515 product page: http://www.ti.com/product/TMS320C5515/technicaldocuments

Regards.

0 Arunabha Deb over 11 years ago in reply to Steve Tsang

Intellectual 710 points

I dnt want to go for an external memory for my design.I want to make my pcb as small as possible.If I dnt want to go for external memory then is there no way to run my own application code upon reset.Please give me some insight about this.I have seen the documents related to bootloader.But as per my understandings these are for booting from external memory.In Ezdsp usbstick board one nor flash is present.Is it not possible to use tms320c5515 without an external memory if i want to run my own code upon reset?

Thanks

Arun

0 Steve Tsang over 11 years ago in reply to Arunabha Deb

TI__Mastermind 23785 points

I am not sure I understand your question. I will try to explain how it works:

There is a bootloader program that runs from ROM at power-on to load a boot-image from a peripheral to the internal RAM of the DSP. It is always invoked after power-on-reset. Once the transfer is completed, the bootloader switches control to the user code so that it is automatically executed. Please note that application program runs on internal memory (SARAM and/or DARAM). Contents of internal memory is gone when power goes off.

Hope this help.

Regards.

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Loading application code on on chip ROM