arm
PINSEL0 EQU 0XE002C000
IO0PIN EQU 0X00280000
IO0SET EQU 0XE0028004
IO0CLR EQU 0XE002800C
IO0DIR EQU 0XE0028008
mov r0,#0x000000ff
mov r1,#0xffffff00
LDR a4,=PINSEL0
LDR a1,=IO0DIR
LDR a2,=IO0CLR
; LDR a3,=IO0PIN
STR r1,[a4]
STR r0,[a1]
; STR r0,[a3]
STR r0,[a2]
我用的是LPC2106,为什么P0口不能输出啊。