For MCS51, I was wondering if there is anyway to specify a __code
variable that is in non-default code bank. Here is what I could like to
do...
__code __at (0x1FFF8) u8_t ieee_flash_addr[8];
The flash programmer will initialize address 0x1FFF8 - 0x1FFFF to the
IEEE address for this chip and this will be retained through code
reprogramming.
Currently I have to directly twiddle the FMAP bank control register:
u8_t orig_fmap;
u8_t ii;
/* Copy IEEE/Serialization Address from 0x1FFF8 (highest bytes in
BANK3) */
orig_fmap = FMAP;
FMAP=3;
for (ii=0; ii<8; ii++) { mac_address[ii] = flash_ieee_addr[ii]; }
FMAP=orig_fmap;
It would be cleaner if the compiler could take care of the FMAP change.
Of course this only works in nonbanked code.
thanks!
a*
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