r
sky10tt倒秒的个位r
P0TABdao_gge10x80r
sky11r
r
r
sky20r
P00xdfr
sky21r
delay5r
r
sky10r
P0TABdao_gge2r
sky11r
r
sky20r
P00xefr
sky21r
delay5倒秒的时位r
r
sky10ttt倒分的ge位r
P0TABdao_ffe
10x80r
sky11r
r
sky20r
P00xf7ttP00xfer
sky21r
delay5r
r
sky10r
P0TABdao_ffe
2r
sky11r
r
sky20r
P00xfbtP00xfdr
sky21r
delay5倒分和时中间一个间隔控制t分控制结束r
r
sky10ttt倒时的时位r
P0TABdao_sshi10x80r
sky11r
r
sky20r
P00xfdtP00xfbr
sky21r
delay5r
r
sky10r
P0TABdao_sshi2r
sky11r
r
sky20r
P00xfetP00xf7r
sky21r
delay5倒时控制结束r
r
r
r
r
分解秒，分，时。r
r
voidfe
jie控制8个数码管显示时间r
r
uchargge2gge1ffe
2ffe
1sshi2sshi1pao1pao2局部变量r
r
pao1pao_miao10r
pao2pao_miao10r
gge1miao10r
gge2miao10r
ffe
1fe
10r
ffe
2fe
10r
sshi1shi10r
sshi2shi10秒，分，时的分解r
r
r
sky10断控r
P0TABpao1秒的个位r
sky11r
r
sky20r
P00x7ftt0x7fr
sky21r
delay5r
r
sky10r
P0TABpao2秒的十位r
sky11r
r
sky20r
P00xbfr
sky21r
delay5r
r
sky10r
P0TABgge10x80r
sky11r
r
sky20r
P00xdfr
sky21r
delay5r
r
sky10r
P0TABgge2r
sky11r
r
sky20r
P00xefr
sky21r
delay5r
r
sky10r
P0TABffe
10x80r
sky11r
r
sky20r
P00xf7r
sky21r
delay5分控制结束r
r
sky10r
P0TABffe
2r
sky11r
r
sky20r
P00xfbr
sky21r
delay5分和时中间一个间隔控制r
r
sky10r
P0TABsshi10x80r
sky11r
r
sky20r
P00xfdr
sky21r
delay5r
r
sky10r
P0TABsshi2r
sky11r
r
sky20r
P00xfer
sky21r
delay5时控制结束r
r
ifshi5ampampfe
30ampamp0ltmiaoampampmiaolt20蜂鸣器20秒的报时r
r
fe
g_mi
g_qi1r
r
elsefe
g0否则让蜂鸣器停发r
r
函数结束，电路图略r
r
voidfe
g_mi
g_qiuchar
um1间断发声r
r
uchardidi_
umr
fordidi_
um
um1didi_
umgt0didi_
umr
r
fe
g1r
delay70r
r
r
r
r
r
ucharkey_sca
r
tr
P20xff对P2口进行赋初值r
ifP2amp0x0f0x0fdelay100键扫描，延时消抖r
ifP2amp0xff0xff在判断键值r
r
cou
tP2把P2口二进制给变量cou
tr
switchcou
tr
r
case0xfe时针加加r
r
r
ifs00若S0键按下r
r
r