topic launch flash command, fallowing program cann't be executed in S12 / MagniV Microcontrollers

launch flash command, fallowing program cann't be executed

gogoranger — Sat, 07 Apr 2012 21:13:30 GMT

hi. i have a problem.

After i launch flash commad. the fallowing program cann't be executed( i use LED_OFF to indicate command complete, but LED do not off, and interrupt cann't enable ). so i have to reset my MCU. and after reset, the flash command is executed Successfully.

fallowing is my code:

LED_ON(D27);

if(!FCLKDIV_FDIVLD){
FCLKDIV = 0x03;
}
while(!FSTAT_CCIF)
;
if(( FSTAT_ACCERR || FSTAT_FPVIOL )){

FSTAT = 0x30;
}
FCCOBIX = 0;
FCCOB = 0x0A7F; /*erase sector */
FCCOBIX = 1;
FCCOB = 0x4000;

Erase_ROM();

LED_OFF(D27);

#pragma CODE_SEG __NEAR_SEG ramcodeseg

void Erase_ROM(void) {

asm
{
PSHC // remember I-bit state
SEI // disable interrupts
}

FSTAT = 0x80; //launch command

while(!FSTAT_CCIF); //wait for done

asm PULC; // restore I-bit

}
#pragma CODE_SEG DEFAULT

can anyone helps me?thanks!!!!

Re: launch flash command, fallowing program cann't be executed

gogoranger — Sat, 07 Apr 2012 21:17:57 GMT

sorry, i forgot to mention that my MCU is MC9S12XF512

Re: launch flash command, fallowing program cann't be executed

kef — Sat, 07 Apr 2012 23:20:10 GMT

Did you check what address Erase_ROM is allocated at? In case ramcodeseg placement is not defined in PRM file, Erase_ROM probably ends in flash, which is wrong. Your PRM file should have line like below in the PLACEMENT section:

ramcodeseg INTO RAM;

Re: launch flash command, fallowing program cann't be executed

gogoranger — Mon, 09 Apr 2012 10:39:40 GMT

hi! thank you for your help!

fallowing is my prm file:

RAM2 = READ_WRITE 0x3000 TO 0x3FFF ALIGN 2[1:1];

ramcodeseg INTO RAM2;

fallowing is my map file:

Name Module Addr hSize dSize Ref Section

Erase_ROM 2000 F 15 2 ramcodeseg

is there any else possible error?

Re: launch flash command, fallowing program cann't be executed

gogoranger — Tue, 10 Apr 2012 22:42:47 GMT

hi! i think i have no error in prm file.

could you give me more suggestion to solve my problem?

my flash command can be accomplish, but fallowing line in program can not be execute.

thank you very much!!!!!!!

Re: launch flash command, fallowing program cann't be executed

kef — Tue, 10 Apr 2012 23:35:54 GMT

Do you have no warning about missing prototype? Are Erase_ROM and surrounding __NEAR_SEG block #pragmas defined before Erase_ROM is called? It is not enough to put just prototype above caller. It may be that Erase_ROM is called with CALL instruction, while it returns with RTS...

Re: launch flash command, fallowing program cann't be executed

gogoranger — Wed, 11 Apr 2012 14:18:34 GMT

hi!

you are right!! it works!!

i use "FAR_SEG" replace "NEAR_SEG"

#pragma CODE_SEG __FAR_SEG ramcodeseg

thank you!!!