As Weddington, Eric wrote:
> int main () {
> while (1) {
> PORTC.OUT = 0x00;
> PORTD.OUT = 0xff;
> }
> }
main:
/* prologue: function */
/* frame size = 0 */
ldi r26,lo8(1600)
ldi r27,hi8(1600)
ldi r30,lo8(1632)
ldi r31,hi8(1632)
ldi r24,lo8(-1)
.L2:
adiw r26,4
st X,__zero_reg__
sbiw r26,4
std Z+4,r24
rjmp .L2
> And the corresponding flat register access:
>
> int main () {
> while (1) {
> PORTC_OUT = 0x00;
> PORTD_OUT = 0xff;
> }
> }
main:
/* prologue: function */
/* frame size = 0 */
ldi r24,lo8(-1)
.L2:
sts 1604,__zero_reg__
sts 1636,r24
rjmp .L2
The structure-based code looks a little cumbersome but is IMHO
correct.
--
cheers, J"org .-.-. --... ...-- -.. . DL8DTL
http://www.sax.de/~joerg/ NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)
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