topic Re: (KL serial bootloader and userapp)how to modify scf file of userapplication in KEIL in Kinetis Microcontrollers

(KL serial bootloader and userapp)how to modify scf file of userapplication in KEIL

fugrace — Fri, 28 Feb 2014 15:04:52 GMT

hI,everyone,I'm design an easy uart bootloader on KL14,the test bootloader has only jump code ,which is bellow:

// relocate vector table

SCB_VTOR = RELOCATED_VECTORS;//0x10000;

// Jump to user application

JumpToUserApplication((RELOCATED_VECTORS),(RELOCATED_VECTORS+4));//*(unsigned long*) //*((unsigned long*)

JumpToUserApplication

msr msp, r0

msr psp, r0

mov pc, r1

END

but it almost never works. I said almost because once it works,it succeed in jumps to where my application locates and it works! but one day later,after some flash changing,

I can never make it work again.

SO now,I wonder if it's because my scf file which decides my code's placement under KEIL.

I want to locate it in 0x10000,so I move the userapp's bin file entirely to this address.

Is it ok?or how should I modify it?

Really appreciate your help,I've worked for a whole week!

Re: (KL serial bootloader and userapp)how to modify scf file of userapplication in KEIL

fugrace — Fri, 28 Feb 2014 15:07:03 GMT

attach my scf file bellow:(128K flash,16K RAM):

; *************************************************************

; *** Scatter-Loading Description File generated by uVision ***

; *************************************************************

LR_IROM1 0x00000000 0x00020000 { ; load region size_region

ER_IROM1 0x00000000 0x00020000 { ; load address = execution address

*.o (RESET, +First)

*(InRoot$$Sections)

.ANY (+RO)

}

RW_IRAM1 0x1FFFF000 0x00001000 { ; RW data

.ANY (+RW +ZI)

}

RW_IRAM2 0x20000000 0x00003000 { ; RW data

.ANY (+RW +ZI)

*(runinram)

}

Re: (KL serial bootloader and userapp)how to modify scf file of userapplication in KEIL

Kan_Li — Tue, 04 Mar 2014 03:45:57 GMT

Hi Fu Grace,

Please kindly refer to page 30 of http://cache.freescale.com/files/microcontrollers/doc/app_note/AN2295.pdf for more details on memory allocation. You may find bootloader demos for KL part in "an2295sw\src\Kinetis\KEIL_uV4" which is from an2295sw.zip(http://cache.freescale.com/files/microcontrollers/doc/app_note/AN2295SW.zip) .

Hope that helps,

Have a great day,
Kan

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Re: (KL serial bootloader and userapp)how to modify scf file of userapplication in KEIL

fugrace — Wed, 19 Mar 2014 07:51:59 GMT

Hi,Kan, sorry for replying late.Thanks for your help.

Now I've known the answer.the user code should be loaded in the moved address.for example 0x1000;

then your sct file should be like this:

LR_IROM1 0x00001000 0x00020000 { ; load region size_region

ER_IROM1 0x00001000 0x00020000 { ; load address = execution address

*.o (RESET, +First)

*(InRoot$$Sections)

.ANY (+RO)

}

RW_IRAM1 0x1FFFF000 0x00001000 { ; RW data

.ANY (+RW +ZI)

}

RW_IRAM2 0x20000000 0x00003000 { ; RW data

.ANY (+RW +ZI)

*(runinram)

}