AVR-Chat

Hi,

Trying to get a bootloader going.  One on the first steps is to writing
the FLASH is to fill the temp buffer in  the Atmel Mega64 I'm using.

; void fill_temp_buffer (unsigned int data, unsigned int adr);
; bits 7:1 in adr addresses the word in the page... (2=first word,
4=second word etc..)
_fill_temp_buffer::
_write_page::
       XCALL __WAIT_SPMEN__
        MOV R31,R19        
        MOV R30,R18         ;move adress to z pointer (R31=ZH R30=ZL)


The call __WAIT_SPMEN__ is this:
__WAIT_SPMEN__:
        LDS     R27,SPMCR       ; load SPMCR to R27
        SBRC    R27,0          ; check SPMEN flag
        RJMP    __WAIT_SPMEN__ ; wait for SPMEN flag cleared        
        RET

When the Mega64 does the LDS R27,SPMCR it reads 0x41 from the SPMCR.
This would indicate that these bits are SET:
Bit 6 - RWWSB: Read-While-Write Section Busy
Bit 0 - SPMEN: Store Program Memory Enable

I'm in the bootloader memory area (Above 0xE000) and I haven't done
anything to set the SPMEN bit. What does happen the WAIT_SPMEN loops
forever because the SPMEN bit never goes low.  From my reading of the
SPEC sheet this should happen.  Is their a reason why this is happening?

I've looked at three different examples of bootload code and they are
all similar in this area.

Suggestions???

Regards, Bob Bryant