武汉原创单片机培训课件：第10讲(教师版)

3?
T|?
!y?
3?
T C?y#
?
"d 7?
?? $?
H9

?
H9

^?
"dB?×1￥?
q
yTZ
T
2aI?e?a
P¨ZL

V¨ ?
LC ?
H e? aü
H a
q?
 a
z
?
 a?|?
3 a?|_? ?bN?
?
H 
9
 VT11?Y??o+
q?
3b
?
H9
à
$?

=?μ
??
H 9
 5

5
?
^9
?
^9

'?
^F b
??
Yq



/?

9


^9


=?

9


^?
Hb
9
?=? ê9
F?b
?
H
HW9
′ V[I?
!?
ZE
^9

=
!
?B?′
?aF 9
anb??9
′
 V
??V′?9
n￥
′
'??
?
H
HW9
′b
?
H9
T19

H
??
Yq

A?V?￥
??
{?bO??

￥Kú
q?
?V
Hò
q￥
b
?
?
H /9
￥2
1
?
H /9
F?
8051?

=?μ
? 16ê￥ VI??
H /9

?
1?
H 0

T0
?
H 1

T1

 VI?ê4T1?
H¨T19
¨bN?
yTZ
Ta?
H
HWa9
′a?a?hp?? V[???
!?,
 2?m
10.1
U
b
CPU
TCON (88H)
TH1 TL1 TH0 TL0
INT1
(P3.3)
INT0
(P3.2)
?
T1 (P3.5)
?
H
1
?
H
0
n


?
(8DH) (8BH) (8CH) (8AH)

?
=?9L
n yTZ
T
y
T
Z
T
70
T0 (P3.4)
70
TMOD (89H)
7070
m 10.1 8051?
H /9

 2m
?m V?
 8051?
H/9
??
H 0a?
H 1a?
HZ
T7i TMOD?
H e?7i TCONF?b
?
H 0
?
H 1
^ 16êFE9

sY?
? 8ê
¨7iF?
?
H 0? TH0 TL0F?
?
H 1?
TH1 TL1F?b TL0aTL1aTH0aTH1￥`ù1?GQ1
8AH～8DH

?7i ( V??`ùb?
H 0?
H 1
¨T9

H
?
?? T0

P3.4
T1

P3.5


{?
￥

9


{?B?


FE9
F 1
¨T?
H
H

=??
ù

9

???
ù
^?′

#9
′??
H

HW9
-??b
TMODaTCOND?
H 0a?
H 1WYV
=?9L#
 è
^ ?¤
 TMOD¨?
!??
H￥yTZ
T
 TCON
¨? e??
H￥?DT?b
CPU
TCON (88H)
TH1 TL1 TH0 TL0
INT1
(P3.3)
INT0
(P3.2)
?
T1 (P3.5)
?
H
1
?
H
0
n


?
(8DH) (8BH) (8CH) (8AH)

?
=?9L
n yTZ
T
y
T
Z
T
70
T0 (P3.4)
70
TMOD (89H)
7070
2
?
H /9
yTe ?
??
H /9

!?1?
HyTZ
T
H
9

=?
?
ù9


VB??
ù
9
9 1
°à9
nb?
H￥?
H
HWD"d￥??
q?
áM1
y
MCS-51?
￥B??
ù? 12???

F?

[
?T?
"d?¨ 12 MHz??
59
?
ù1

1us
?
^K
￥?
H?
ù

a?ê4?
H￥′ V|
ò??
H
HWb
??
H /9

!?19
yTZ
T
H
9
 ?1
{??? T0

P3.4
 T1

P3.5
￥???|9

??

￥/ ?
|( ?9
b
??
ù￥ S5P2
ùW?
"??
{?è
ü
?-B??
ù?"′1 1
aB?
?
ù?"′1 0
59
F 1b?￥9
′
^_?
?
{???è
ü?
3 1? 0￥μKMa
?/B??
ù
￥ S3P1
ù W 
? 9
?￥
 Vn
_?B?? 1? 0￥μ
KM 31
??
ù

[
Kú_?
q1??
q
￥ 1/24b9
??
{??|￥] b1
àμ+Y￥K
?
 ?A ?￡
{??|￥úè
üD?è
ü￥??
HW
B??
ù[
b
?
!?
?
H￥yTZ
Ti??
HyTa

?
Hü?$
!?￥yTZ
T? ?yT
?]¨ CPU
￥?T
HW
oμ9
9
n
H? V
? CPU
?-￥?Tb1??
H￥?|/B?)
b
3
?
H /9
￥Z
T7i e?7i
?
LT 5??1
 V?
??
H /9
yT-
-
 CPUA?|Bt


7

?1 e? 3
 ? ?
H /9
?
??V??1?
H /9
 ￥
Sb?
H /9

￥
SYV?
H /9
￥Z
T7i TMOD e?7
i TCON??b
1) ?
H /9
Z
T7i TMOD
TMOD1?
H  0a?
H 1￥yTZ
T7i
ì
T
?/

TMOD D7 D6 D5 D4 D3 D2 D1 D0
GATE M1 GATE M1
/CT
M0
T/C
M0
?
H 1 ?
H 0
TMOD￥? 4ê1?
H 0￥Z
T3

ú 4ê1?
H
 1￥Z
T3


ì￥cl??M]b
(1)?M1 M0
Z
Tê4êb?l?/

M1 M0 yTZ
T ?
a
ü
0 0 Z
T 0 13ê9

0 1 Z
T 1 16ê9

1 0 Z
T 2 1?
? 8ê9

1 1
Z
T 3
?
H 0
s?
? 8ê9

?
H 1
T?9
(2)?
?
ê4êb
H

!?1?
HyTZ
T

H

!?19
yTZ
Tb
(3) GATE

ê eêb? GATE=0
H
èq e?ê TR0
TR1? 1' V??
H
? GATE=1
H
èq e?ê TR0
TR1?? 1
]
H?

P3.2


P3.3
1úè
üZ V?
?
H
'
???a??
Hb
TMOD?
êù?
o
¨3?·
7
!?ú 4ê?l?
H 1
? 4ê?l?
H0?
HyTZ
Tbˉê
H

TMOD
μê (? 0b
TC /
?

!??
H 1yT?Z
T 1
?
HyTZ
TD???
í1
5 M1=0
M0=1

GATE=0
yN
ú 4ê?1
0001
?
H 0?¨
? 4ê V
i?

??
ê? V1
11

yZ
T 3
H
?
H 1T?9


B?|
!1 0000b
yN
·
7?
T1
 MOV TMOD
#10Hb
2) ?
H /9
 e?7i TCON
TCON￥T¨
^ e??
H￥?aT?
S??
H
￥n?f ?b?
H e?3 TCON￥ì
T?/

TCON

88H
 8FH 8EH 8DH 8CH 8BH 8AH 89H 88H
TR0
TF1 TR1 TF0 IE1 IT1 IE0 IT0
òêcl?/

(1) TCON.7 TF1
?
H 1nS?êb??
H 1
9
á
3n
H
??q1?? TF1=1b?
?
H
_ CPU??
H 1￥?hp
é? ? ? ? ?
a
??q1?b 0b?
à7
H
 TF1 VT°??
k
¨
N
Ho
?èqb 0b
(2) TCON.6 TR1
?
H 1? e?êb?èq? 1
b0 ??1>?
H 1b? GATE=1
O1úè
ü
H

TR1? 1??
H 1
? GATE=0
H
 TR1? 1' V??
H 1b
(3) TCON.5 TF0
?
H 0nS?êb?
#?T
f ?] TF1b
(4) TCON.4 TR0
?
H 0? e?êb?
#?
Tf ?] TR1b
(5) TCON.3 IE1
??? 1


hpS?êb
(6)TCON.2 IT1
??? 1(?Z
Tê4êb
(7)TCON.1 IE0
??? 0


hpS?êb
(8) TCON.0 IT0
??? 0(?Z
Tê4êb
1
INT
0
INT
TCON?￥? 4ê¨? e????
D?
H /9
í
1
|/B??o
b?"dˉê
H
 TCON￥
μê (b
0b
TCON￥3?1?1 88H
 V[êù?
bnS?ê
??
H? V[¨ê?T·
7b SETB TR1aJBC TF1b
3) ?
H /9
￥
S
???
H/9
￥?
^?èqI???￥

[
B
?
P¨?
H /9
-?1é?
Sb
S???
/

(1) ??yTZ
T —— TMOD?′b
è??′? 1
 MOV TMOD #10H
V
ü?
H
1yTZ
T 1
OyT?
HZ
Tb
(2) ???
H9
￥′ ——°¤|′? TH0a
TL0TH1aTL1b
?
H/9
 ￥ ′ yyTZ
T￥?]7?]b
!K
v9
′1 M
5ò?yTZ
T/￥ M′?/

Z
T 0

Z
T 1

Z
T 2

81922M
13
==
655362M
16
==
2562M
8
==
Z
T 3
?
H 0s?
? 8ê9


[
??
H￥
M′ (1 256b
y?
H /9
yT￥
Lé
^S,F 1”9


[
?K
v9
′ M′X?
H
′ X V9
?/

X = M?9
′
??
H 1?¨Z
T 1?
H
M=65536
y1p
50msn
BQ
??¨ 12 MHz??
59
?
ù T=1 μs
9
′

[
9
′1| 3CaB0sY??ó TH1aTL1b
(3) ? 31 7?
H /9
? ——°¤ IE7i
?′b
(4) ??
H /9
yT ——| TR0TR1?,1”b
GATE = 0
H
°¤?èq?ê?
GATE = 1
H

"èq?ê?
A?? ? ?? )F
M ?￥ è
ü
′?
?b
LT 5??1
?y GATE = 0

[°¤?
èq?ê?
·
71
 SETB TR1b
àN1?
?
H /9
￥
SV?X?8b
?
H/9
￥yTZ
T
?-
=? V?
YV TMOD7i ? M0aM1ê
é?
!?
 Vê4 4?yTZ
T
/
?Bé?
b
1
Z
T 0
Z
T 0?B? 13ê?
H /9
bm 5.2
^?
H 0Z
T0
H￥
 è
^2
?
H 1￥2?TD?
H 0
??M]b
??
12
C/T=0
C/T=1
e?
T0
TR0
GATE
&
Y1
1
INT0
?
TL0
5
ê
TH0
8
ê
TF0
m 10.2 ?
H 0

?
H 1
Z
T 0
H￥
 è
^2m
?m V?
 16êFE9


TH0 TL0
o¨
 13êb
?
 TH0]ú 8ê
 TL0]? 5ê

o¨? 5ê
ú 3ê?
¨
b? TL0? 5ên
H1?_ TH0éê
7 TH0n
H
_?ê TF0éê

?q1??ê

i
#h?b
? = 0
H

^ 71 ?¤ 12s

{
?
H 0
?
ù9

N
H
?
H 01?
Hb?
H
HW1
? = 1
H

^ 71D T0

P3.4
M ?
??9

? T0?
{?
????|è
ü?
3? 0? 1￥μKM
H
9
F 1
N
H
?
H 019
b
? GATE = 0
H

ê$
í
?|írb
ê
{è
1
u 7D
ê
 TR0°¤ e??
H 0￥?1>b TR0 =
1
¤Y e? 71
?
H 0V′ 7
S9
°ànbn
H
 16êF9
1 0
TF0?ê
i
#h?b?1?ì9

5?
H 03×?′
O3¨èq| TF0ˉê

LT 5
??1
?ü?¨
×?′?  JBC


7b TR0 = 0
5
D
ê$
í
 e? 71$1
T?9
b
? GATE = 1
H
D
ê￥
{?￥
{?è
ü TR0ê￥
???b? TR0 = 15D
êu 7
???|è
üYV??°
¤ 71?
H 0
?1úè
ü
H

?9

? 5T
?9

? TR0 = 0
5D
ê$
í
 e? 71$1
T?
9
b
è 10.1 ¨?
H 1
Z
T 0
LC 1 s￥ü
Hb
3
yZ
T 0?¨ 13ê9
,Kv?
H
HW1

8192?1 μs = 8.192 ms
yN
?
H
HW? V
^
LT 5??1

B"ê4 50ms
 Vê4?
H
HW1 5c ms
?ì 200Qb?
H
HWê?a
??9
′1 5000
5?
H 1￥′1
X = M?9
′ = 8192? 5000 = 3192 = C78H =
0110001111000B
y 13ê9
? TL1￥ú 3ê?¨
?A 0
TH1]ú 8
ê

[
 X￥
L=A′?1
X = 0110001100011000B = 6318H
'
 TH1 = 63H
TL1 = 18H
?y?¨Z
T 0?
H
#
TMOD = 00Hb
VI¤ 1 sü
H0???/

DELAY
 MOV R3
#200
? 5 ms9
?ì′
MOV TMOD
#00H

!?
H 11Z
T 0
MOV TH1
#63H
??
H′
MOV TL1
#18H
SETB TR1
? T1
LP1
 JBC TF1
LP2
°?9
n
SJMP LP1
?? 5 ms??9
LP2
 MOV TH1
#63H
×???
H′
MOV TL1
#18H
DJNZ R3
LP1
?? 1 s???ì
RET
Rí???
2
Z
T 1
?
HyT?Z
T 1
H

 2m?m 5.3
Ub
?m V?
Z
T 1?B? 16ê?
H /9

2D
?T+??DZ
T 0M]
?BμY
^=?9
ê
? ] b
T?
H¨
H?
H
HW1 (M – ?
H 0′ )?
Hò?
ù
?12=(65536 – ?
H 0′ )?
Hò?
ù? 12Z
T 1￥?¨X
 1 sü
H???
a
ü
? ú?
b
??
12
e?
T0
TR0
GATE
&
Y1
1
INT0
?TF0
TH0
(8
ê
)
C/T=0
C/T=1
TL0
(8
ê
)
m 10.3 ?
H 0

?
H 1
Z
T 1
H￥
 2m
?
H9
￥?¨
? 9
?
H9
′
$?
H9
′9

T

? 
/DyTZ
Tμ1 
Z
T 
H
/

Z
T 
H
/

Z
T a
H
/b
?
HWD??
qμ1 ?
HW GPTD
GPTD.);
H
?
μ4

GPTD.);
H
? μ4b
X???.)[
1p?
HNT

ksYp5y
T?Z
TaZ
TaZ
TaZ
T
H￥?
H′b
3
 òyTZ
T 



&? μ4μ4')
')?=é?

')


#

  #
?
 ? ê -@F ê 
? 5-
5-
#)

ú
ú
ê #
? 5)
5)#')b
ó yTZ
T

5′ 

μTμT&?'')
5)'')
5-)b
? yTZ
T

5′ 

μTμT
5))
5-)b
? yTZ
T

5Z
T
H
$·?
?ê?
H
?
H′ VsY9

9
ZE]Z
Tb
??
H′B?
?5-

6B?

?5)byN

5))
5-)b
V
 è? A?
 Z
T
H9
?
H ′1?
P
? 

T9

′a
1MDB/
?^p
??°¤¨
Z
T
OZ
T9
S?1Z
Tl
 Z
T?? V[¨Z
T
}9
Z
TDZ
TM1
í?a? b
? ?
H9
?¨??
ò ?ê4?
H9
 yTZ
T
ó 9
?
H9
?
H ′ ?


T9

? I??¨??
??
H9
￥
S
 ??l5.0%a??
H′a
!??"da
??
H9
??b
???I??
H9
????
?i
^?31×
?
H′
?31 ??Qˉ
P¨e?
H
HW
O?yTZ
T
5??
????×
?
H′b
k¨ 5Z
T I???
 1??
{?
ù 1
ù
μ4￥

Zo
X? GPTD.);b
3
? 9
?
H′
5′ 

μTμT&?)
5))
5-)
?
!?5.0%

    #)
5 e?ê
D5í1
5Z
T
5?
H
5?D í1
*/5
è I??? ?/

03( ) ˉê1?
-+.1 ."*/ ???
03( #) 5?? g1?
-+.1 *5 5????
03( ) ???
n1?
."*/ .07 5.0%
) ?5?
HZ
T
.07 5-
) ??
H′
.07 5)
) ??
H′!z
.07 *1
#?5úa5)
.07 *&
'') ?? 7?
4&5# 53 5?
4+.1  ??5?
03(


) 5????
n1?
*5 $1-


1









{o?|Q
n1?
3&5*














?Rí
} [
5 ~
?v[
 è5yTZ
T 
?/
1ps Y
????

?

ZoV 1
{

? GPTD.)[

è

Zo
z1 μT

é ¨?
H 9
 5

X???.);
?m
1p ?¨?
H5
Pm
??;=5%é?
eú
-b
3
?;=5é?
e
ú
-b'B
eòB
B
à

NT
à

NTb??.)[


? μT
5Z
TKv?
Ho
NT?b
|5?
HNT
9
Q
' V
LC
NT?
Hb
? 9
?
H′
5′ μTμT
&?$#)
5)$)
5-#)b
?
!?5.0%

    #

)
5Z
T
5
Dí1
5 e?ê
*/5
è I??? ?/

03( ) ˉê1?
-+.1 ."*/ ???
03( #) 5?? g1?
-+.1 *5 5????
03( ) ???
n1?
."*/.07
5.0%
) ?5?
HZ
T
.07 5)
$) ?5′NT
.07 5-
#) 
.07 *&
#5 7?
.07 3
") ?NT9
′
4&5# 53 5?
4+.1  ???
03(

)
*50
.07
5)
$)



×?5′NT
.07
5-0
#0)
%+/;
3
(03&5

NT??
$1-

1







NT?

{|Q
.07

3
")



ˉNT9
′
(03&5
3&5*
X?GPTD.)[
_?5??
￥


i|T
=
￥

A
UA
U
à


?T
?BQA
U′

!B
e
=

??
b
? 5
"1p
5¨T9
Z
T
5¨T?
H
Z
T
?
HNTb
03(
)
-+.1
."*/




???
3(
#)
-+.1
*5





5????
03(

#)
-+.1
*5M
5????
03(

)
."*/
.07
41
)



?\
.07
5.0%
)



?59
Z
T
5?
HZ
T
.07

5)
)



?5′
.07

5-
)




.07

5)
$)




?5′
.07
5-
#0)




4&5#
15









?51úa5)
.07

*&
#


50a1 g? 7?
? 7?
4&5#
53









50?
4&5#
53M
5?
.07

3
0")




?M00NT9
′
-%*3-$"--
%*3







?¨A
U0??
i???
4+.1
-%*3








?ìA
U
03(
)








5????
n1?
*5M
 .07
5)M
$)




×?5′
.07
5-
#0)




%+/;
3
(03&5




T??
T??Rí
$-3
53










T?
5T
.07
)
5-





:
cMT
=5??

?
.07
)
5)0






.07
5-0
)






9
5b
.07
5)
)





4&5#
53









50×??
.07

3
")




ˉM00NT9
′
164)
"DD









1C?
164)
148










164)
%1)










164)
%1-










-$"--
803,







?¨
) ?0??
101
%1-










ˉC?
101
%1)











101
148











101
"DD











(03&5
3&5*












5?Rí
X? GPTD.)[

kI l
H

Eè0ò??

es
H
sY
i 3a3a3?
 V°¤?¨A
U?? %*3b
3
 03(



)



ˉê1?
-+.1


*5





???
03(



#)



5?? g1?
-+.1


*5





5?
5??0?? *5
03(



)



???
n1?
45"35.07



3





e9
b 
.07



3




s9
b 
.07



3





H9
b 
.07



3




μ49
b 
.07



3




NT9
b 
.07



5.0%
)? 5?
HZ
T 
.07



5-
)
? 5?
H′ μ4
.07



5)
)
¨?1?ˉ?
H′
4&5#


53





? 5
8"*5
-$"--

%*3





A
U
Hò
Hs
ei???
4+.1


8"*5




?ìA
U
03(



) 5????
n1?
*5 .07



5)
$)
×? 5′ N4
.07



5-
#)
%+/;


3
(03&5

N4??
$
$1-



1




N4
?
{|Q
.07



3
")

ˉ
ˉ
N49
′
(03&53&5*












03( ) 5??0??
n1?
*5 */$ 3 μ49
9
$+/& 3

*5


NT
?
*5 +$ *5 ?
NT
RíRí
.07





3
 
NT
μ49
b 
*/$





3 NT9
9
$+/&




3

*5 
T
?
*5 +$ *5 ?
T
RíRí
.07
3
 
T
NT9
b 
*/$ 3 





e9
F 
$+/&




3

*5 

e
?

*5 +$ *5 ?

e
RíRí
.07 3
 

e
e9
b 
*/$ 3 






s9
Fs9
F 
$+/& 3

*5 
s
?s
?
*5 +$ *5 ?
ss
RíRí
.07 3
 
ss
s9
b 
*/$ 3 







H9
F 
$+/& 3

*5 
l
H
?
*5 +$ *5 ?
l
H
RíRí
.07 3
 
l
H
H9
b 
*5 3&5* RíRí
y??*/5a*/5X$]¨

k ?¨?
H9
5 ?Z???b
3
 ?¨?
H 9
 5 ?Z???
H? μ

?Hq

B
^ ??(?

V 1
{? /?
μr


=
^ |?
H 9

!??9
"?

'
?
H′1 '')
 ?B?

'
n(??
b
I??/

03(


) ˉê1?
-+.1

45"35







ˉê

S??45"35
03(


#) 5?? g1?
-+.1

*5









5??0??*5
03(


) 
S??
n1?
45"35 .07


41
)





?\
.07



5.0%
)


?59
Z
T n1
.07



5)
'')


?5′
.07



5-
'')



4&5#



15







?51úa5) n1
.07



*&
'')



?? 7?
4&5#


53








5?
4+.1


."*/







???
i??5?
03(



) 5??0??
n1?
*5 l 5??0??
3&5*















L
?¨?
HIB?
Hò??
iO¨
5|
HWA
U ?b
'1p

HWA
U?

5A
Ub
í
üAú
-b
?Z1p
 1,
YV?o??
HWb
2,9FB?
eV?
b
?
Ls

? "d
è[a|é?
Hò


B? LED
l
H
sò

eò]
êb
? N
H?????o
^
àμ?Q?￥b
? ?|?| 1 2]
H?/BQ
"d|é?
HW
!?
b
? ?1 2|sY_P_·M?
1ê4??￥ LEDb
? ?3 4|sY9Fh

??ê￥
′b
? ?|?| 3 4]
H?/BQ
"d||
HW
!?
b
? ?|?| 1 3]
H?/,"d|é?
eV9
H
b
? ?Q?/ 1 3
5|
eV9
H
b