📄 115.2k串行口通信程序.mht
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=C4=D2=D1=B1=BB=E4=AF=C0=C0 2058 =B4=CE</TD></TR>
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id=3Dfont_word=20
style=3D"FONT-SIZE: 14px; FONT-FAMILY: =
=CB=CE=CC=E5, Verdana, Arial, Helvetica, =
sans-serif">//115.2k=B4=AE=D0=D0=BF=DA=CD=A8=D0=C5=B3=CC=D0=F2=A3=AC=D0=A3=
=D1=E9=B7=BD=CA=BD=CE=AA=BC=F2=B5=A5=CB=AB=CF=F2=D0=A3=D1=E9,<BR>//=B6=F8=
=C7=D2=CA=C7=B1=D8=D2=AA=B5=C4=A3=AC=D2=F2=CE=AA=C8=CE=BA=CE=B2=C9=D3=C3=D6=
=D0=B6=CF=A1=A2crc=B5=C8=B5=C4=B7=BD=B7=A8<BR>//=BE=F9=BA=DC=C4=D1=B1=A3=D6=
=A4=CB=D9=B6=C8=BA=CD=B1=DC=C3=E2=B4=ED=CE=F3.<BR>//=D7=DC=CC=E5=CB=D9=B6=
=C85KB/=C3=EB<BR><BR><BR><BR>//=B5=A5=C6=AC=BB=FA=B3=CC=D0=F2<BR>//=CA=B9=
=D3=C322.1184=BE=A7=D5=F1<BR>unsigned char time,b_break,b_break=
_3;<BR>//35.555ms<BR>void int_t0(void) interrupt 1 {<=
BR> TH0=3D0;<BR> if ((++b_break_3)>2) b_break=3D1;=
<BR> time++;<BR>}<BR><BR><BR>unsigned char rec(void) =
{<BR> TH0=3D0;b_break_3=3D0;b_break=3D0;<BR> while (RI=3D=3D=
0) {<BR> if (b_break) return(1); //=B5=
=C8=B4=FDpc=B7=A2=CB=CD100ms=B3=AC=CA=B1<BR> }<BR> RI=3D0;<BR>&=
nbsp;SBUF=3DSBUF;<BR> return(SBUF);<BR>}<BR>/*=B7=B5=BB=D81=B1=ED=CA=
=BE=CA=A7=B0=DC*/<BR>bit sen(unsigned char d) {<BR>&n=
bsp;SBUF=3Dd;<BR> TH0=3D0;b_break_3=3D0;b_break=3D0;<BR> while&=
nbsp;(RI=3D=3D0) {<BR> if (b_break) return(1);&=
nbsp; //=B5=C8=B4=FDpc=CB=CD=BB=D8=CF=E0=CD=AC=D7=D6=BD=DA=CA=FD=BE=DD=
=A3=AC100ms=B3=AC=CA=B1<BR> }<BR> RI=3D0;<BR> if (SBU=
F!=3Dd) return(1);<BR> return(0);<BR>}<BR><BR>void main(vo=
id) {<BR> unsigned int i;<BR> unsigned char=
d;<BR> EA=3D1;<BR> SCON=3D0xd8;PCON=3D0x80;<BR> TMOD=
=3D0x21;<BR> TL1=3DTH1=3D0xff;TR1=3D1;<BR> TH0=3D0;ET0=3DTR0=3D=
1;<BR> while (1) {<BR> d=3Drec();<BR> &nbs=
p;if ((!b_break)&&(d=3D=3D0x55)) {<BR>  =
;d=3Drec();<BR> if (!b_break) {<BR>  =
; if (d=3D=3D0xaa) {<BR> &nbs=
p;//=BD=D3=CA=D5=B5=BDpc=CB=CD=C0=B4=B5=C4=D2=AA=C7=F3=B7=A2=CB=CD=D6=B8=C1=
=EE0xaa55<BR> for (i=3D0;i<1000;i++)=
{<BR> if (sen(i)) {<BR=
> //=B7=A2=CB=CD=B4=ED=CE=F3<BR>=
break;<BR> &nb=
sp; }<BR> }<BR> =
} else if (dd=3D=3D0xaa) {<BR>  =
; //=BD=D3=CA=D5=B5=BDpc=CB=CD=C0=B4=B5=C4=D2=AA=C7=F3=BD=D3=CA=
=D5=D6=B8=C1=EE0xaaaa<BR> for (i=3D0;i&=
lt;1000;i++) {<BR> d=3Drec();<BR>=
if (!b_break) {<BR> &n=
bsp; //=D5=FD=C8=B7=BD=D3=CA=D5=B4=A6=C0=ED<=
BR> } else {<BR> =
//=BD=D3=CA=D5=B4=ED=CE=F3=B4=A6=C0=ED<BR>&=
nbsp; break;<BR> &nbs=
p; }<BR> }<BR> &=
nbsp;}<BR> }<BR> }<BR> }<BR>}<BR><BR><BR=
><BR>//=B5=E7=C4=D4=B3=CC=D0=F2tc2.0<BR>#include "stdio.h"<BR>#inclu=
de "dos.h"<BR>#include "process.h"<BR>#include "string.h"<=
BR>#include "conio.h"<BR>#include <dir.h><BR><BR><BR>unsi=
gned char time_out;<BR><BR>void init_com1(void) {<BR>=
outportb(0x3fb,0x80);<BR> outportb(0x3f8,1);<BR> outportb=
(0x3f9,0x0);<BR> outportb(0x3fb,0x3);<BR>}<BR>void sen_com1(uns=
igned char d) {<BR> long i;<BR> time_out=3D=
0;<BR> while (!(inportb(0x3fd)&0x20));<BR> outportb(0x=
3fd,0x0);<BR> outportb(0x3f8,d);<BR> i=3Dclock();<BR> whil=
e (1) {<BR> if (clock()>(i+8)) {time_ou=
t=3D1;return;}<BR> if ((inp(0x3fd)&0x1)=3D=3D1) =
break;<BR> }<BR> if (inp(0x3f8)!=3Dd) {time_out=3D2;r=
eturn;}<BR>}<BR>unsigned char rec_com1(void) {<BR> lo=
ng i;<BR> unsigned char d;<BR> time_out=3D0;<BR>=
i=3Dclock();<BR> while (1) {<BR> if =
(clock()>(i+8)) {time_out=3D1;return(0);}<BR> if =
((inp(0x3fd)&1)=3D=3D1) break;<BR> }<BR> d=3Dinp(0x3f8=
);<BR> while (!(inportb(0x3fd)&0x20));<BR> outportb(0x=
3fd,0x0);<BR> outportb(0x3f8,d);<BR> return(d);<BR>}<BR>void&nb=
sp;main(void) {<BR> int i;<BR> long st;<BR> =
;init_com1();<BR> st=3Dclock();<BR> sen_com1(0xaa);<BR> if=
(time_out) {printf("CPU not ready!");exit(-1);}<BR>&=
nbsp;sen_com1(0xaa);<BR> if (time_out) {printf("CPU n=
ot ready!");exit(-1);}<BR> for (i=3D0;i<1000;i++) =
{<BR> sen_com1(i);<BR> if (time_out) {pri=
ntf("CPU not ready!");exit(-1);}<BR> }<BR> printf("To=
tal use %3.2f S.",(clock()-st)/18.2);<BR> exit(1);<BR=
>}</FONT></TD></TR>
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