launch flash command, fallowing program cann't be executed

[gogoranger]

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!!!!

[kef]

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;

[gogoranger]

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? 

[gogoranger]

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!!!!!!!

[kef]

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...

[gogoranger]

hi!

you are right!! it works!!

i use "FAR_SEG" replace "NEAR_SEG" 

#pragma CODE_SEG __FAR_SEG ramcodeseg 

thank you!!!

[gogoranger]

sorry, i forgot to mention that my MCU is MC9S12XF512