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#define _CRT_SECURE_NO_WARNINGS; @1 {8 Z' v' u5 X
#include8 r2 B. ~' `% W7 E6 S; f* _! J: A
#include1 D5 [. J5 H. V& ^# K: C
#include "tchar.h"
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7 w4 X# d0 b( \3 y" E1 ~7 a" W#include! q8 H9 j1 Q9 q9 p6 {- ~* L" Z0 w; ^
#include
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int mAIn(), c( l2 F2 K4 p1 Q% K* m3 c- C6 z3 D
{
# g/ A$ \$ C- b" G1 t HANDLE hCom1;8 f6 f9 V+ |- l2 F9 O3 g
COMMtiMEOUTS TimeOuts;
' n9 g8 O6 L4 r4 ~ s DCB dcb1;
- M+ g; R! |; v. w7 ]! A# l DWORD i ;* V& f4 O0 v& D! R
DWORD wCount =4;+ }; n: H$ u& J5 K0 Y. l4 Q
DWORD wCount1;# o, J" V5 X4 y; ~
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unsigned char str[8];
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- k2 k! L7 Z& s+ p Y: K" b hCom1 = CreateFile("COM4",
2 N' c6 |8 M+ n& d! r+ k7 y GENERIC_READ | GENERIC_WRITE,& U, Z& m" C; b* o8 x6 B9 C
0,
# D- M9 } y2 e7 @# f, W NULL,6 S5 M: p; i* T `
OPEN_EXISTING,0 _$ ^) m4 O) o2 z7 m
0,& a6 p1 t& @, O' F: Y
NULL);
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- y; M- p: R+ u' C, j1 H if (hCom1==INVALID_HANDLE_VALUE )9 z# ~0 `- v" M& ?. a
{
1 S' ]: y* f6 S1 a8 f5 A$ O printf("read open failed\n");, Q" ~% w; G0 {0 x7 s( K' ?
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}
& W9 \1 o4 J$ h& H+ P else
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& w6 r2 |4 J7 I- C" r B printf("read open successed\n");
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SetupComm(hCom1, 20480, 20480);
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, T1 {4 Y7 t$ |3 s+ N" J //COMMTIMEOUTS TimeOuts;
! o- m* _! {4 @ TimeOuts.ReadIntervalTimeout =100;
; S J" U/ [0 E4 p! _: f v TimeOuts.ReadTotalTimeoutMultiplier =500;
$ T4 i3 m ]% S) C5 ?: ~ TimeOuts.ReadTotalTimeoutConstant = 5000;
$ Q1 R/ ^. F$ H1 q$ f: W: L% F TimeOuts.WriteTotalTimeoutMultiplier = 500;
$ ` W/ j3 p* } TimeOuts.WriteTotalTimeoutConstant = 2000;
& c3 W. d' z# k+ c x SetCommTimeouts(hCom1, &TimeOuts);
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# J, V! `8 X/ T2 ~) }# l U9 \ //DCB dcb1;
; k) ~, z" @8 J5 ]$ g% J GetCommState(hCom1, &dcb1);( i/ w1 _& c% J0 r; o" ^9 \
dcb1.BaudRate = 115200;& ~* n! J7 k- x( J" e9 I8 m
dcb1.ByteSize = 8;//一个字节8bit
: n/ o& H+ Y* k) I; ^ dcb1.Parity = NOPARITY;//无校验
, K+ q4 T4 h# m- c" M3 s- F% J/ D dcb1.StopBits = ONESTOPBIT;//1位停止位
+ U! u) `8 p) K) l$ U, l dcb1.fParity = FALSE;) K( l; g1 C6 J* G
dcb1.fNull = FALSE;/ U p; g: v2 Q" B
SetCommState(hCom1, &dcb1);
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/ o* s' h4 Y [# j PurgeComm(hCom1, PURGE_TXCLEAR|PURGE_RXCLEAR);
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if(!ReadFile(hCom1, str, wCount, &wCount1, NULL)): @' O9 k! G: a- j
{
; I: E' S5 e% X7 J, N. m1 V printf("read failed!"); D6 K9 ] E7 w( J9 P
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$ n! w& Z" K6 \3 _ else
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printf("read successed!");
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printf("wCount1:%d\n", wCount1);7 f! O8 g2 Q8 G3 G4 |' Q5 @. b
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- ~! G- A2 H2 d printf("read data is");" a2 ]8 v; A4 {& e" G0 ~% N; F9 n
for(i=0;i {, d* y D% q3 v8 e1 S6 ?
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printf("%02X", str);
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CloseHandle(hCom1);' j6 I" s$ P( f, e E
K i! z# i8 m& U4 t// system("pause");
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代码贴上来了，wCount1总是为0，不知道哪里出了问题，有没有大佬帮忙看下，感谢。
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发表于 2023-3-14 14:10
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支持！
反对！