i
cludereg52hr
defi
eucharu
sig
edcharr
defi
eui
tu
sig
edi
tr
ucharcodetable0XC00XF90XA40XB00X990X920X820XF80X800X90r
sbitkeyP33r
ui
t
umr
r
voiddelayui
tzr
r
ui
tijr
forizi0ir
forj110j0jr
r
r
voidkey_sca
r
r
ifkey0r
r
delay1r
ifkey0r
r
whilekeyr
umr
if
um9999r
um0r
r
r
r
voidmai
r
r
while1r
r
key_sca
r
r
P00xfe位选P000，选中第一个数码管，其阳极与Vcc相通r
P1table
um1000送数码管上要显示的数据r
delay1延时点亮数码管r
r
P00xfdr
P1table
um1000100r
delay1r
r
P00xfbr
P1table
um10010r
delay1r
r
P00xf7r
P1table
um10r
delay1ttr
r
r
r
r
数码管显示过程：位选确定哪个管子显示、段选确定在数码管上显示什么。依次点亮各个数码管从而达到动态显示r
r
通过按键改变显示内容。r
r