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#define _CRT_SECURE_NO_WARNINGS
9 ^7 g$ k4 i |5 ]#include u$ x; h5 ~8 U
#include
' r" I1 H# M, u) Z/ O/ C' F#include "tchar.h"
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, F: Z: l0 h/ A( n5 i7 I r/ s#include
: _% v) e7 s# \/ u% l2 g, Z q# B#include% A8 D" ~1 h1 u+ ^6 `% o* x
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int mAIn()
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. |8 a9 ?+ _, d, P& j HANDLE hCom1;. b) w$ n [6 f0 ~) P" C
COMMtiMEOUTS TimeOuts; 9 B6 v1 I A" \! @
DCB dcb1;/ J; L1 I9 @3 M" |, L1 u
DWORD i ;
5 V8 Z' N% e* G; \. w# v& k DWORD wCount =4;; K' o# g; e6 f0 ~9 o
DWORD wCount1; b1 r( c5 ^6 q( @0 s9 D/ Z4 @* f: ~
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unsigned char str[8];
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hCom1 = CreateFile("COM4",
7 Y! E: ?7 h' [ c GENERIC_READ | GENERIC_WRITE,% y+ c; O5 `" d8 @' t
0,
. L# s9 c& `8 \0 P' t1 {7 u NULL,
8 i1 h, H* K& M% ^' }# A OPEN_EXISTING,
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NULL);
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) u% R6 f/ e7 s9 D if (hCom1==INVALID_HANDLE_VALUE )7 M7 K; `8 ^; ~1 Q1 h V- M
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printf("read open failed\n");3 g$ E5 n! h4 A! ]2 g* ?0 C/ E& B
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}
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{
. K: B- d9 M' e8 |' I printf("read open successed\n");
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8 s) t) K3 B3 i1 x SetupComm(hCom1, 20480, 20480);
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//COMMTIMEOUTS TimeOuts;
7 T. `! Y/ S" P: `$ ]+ V t TimeOuts.ReadIntervalTimeout =100;8 w, X! a. V# W
TimeOuts.ReadTotalTimeoutMultiplier =500;* R9 D$ @% ^6 `
TimeOuts.ReadTotalTimeoutConstant = 5000; $ l- ]: X9 K$ Z
TimeOuts.WriteTotalTimeoutMultiplier = 500;- u2 \ A4 A4 g# f. F9 B
TimeOuts.WriteTotalTimeoutConstant = 2000;3 C3 v6 m# r; m
SetCommTimeouts(hCom1, &TimeOuts);( @5 p4 W; d8 f, Y
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//DCB dcb1;
! F8 P, z* D6 K GetCommState(hCom1, &dcb1);
) q; f; v% X0 q: w2 Q dcb1.BaudRate = 115200;2 J: y2 z k2 U) \, d3 E2 P+ w L
dcb1.ByteSize = 8;//一个字节8bit
; j6 u% o; D4 d: _5 C dcb1.Parity = NOPARITY;//无校验6 o0 Y% `- L7 K+ ^( A
dcb1.StopBits = ONESTOPBIT;//1位停止位
- t/ j Q! K& f, p0 T+ o dcb1.fParity = FALSE;9 U+ N6 C$ k+ p$ a7 C0 y- D% j1 Q
dcb1.fNull = FALSE;& k+ J1 z/ q; P1 J- A- ]# P
SetCommState(hCom1, &dcb1);* e1 S3 ^$ I2 E. F. l- v8 ]
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PurgeComm(hCom1, PURGE_TXCLEAR|PURGE_RXCLEAR);
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" j1 ~ a$ u8 d, M4 o. G$ E! w if(!ReadFile(hCom1, str, wCount, &wCount1, NULL))$ i* |9 a. q' D& z* z8 G
{
0 @) P4 g* R {$ w4 r6 K2 u: { printf("read failed!");1 w! B' f: b9 x5 ^, r' Y) V
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}
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printf("read successed!");8 h# m' _& a, j
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3 I1 x% t5 w) A4 k S printf("wCount1:%d\n", wCount1);
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printf("read data is");
5 Z% b2 L. O* A7 X/ h for(i=0;i {
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printf("%02X", str);
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}
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CloseHandle(hCom1);% `* v6 I2 q9 i2 f8 \- ^
: Y q( D! M# ~// 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。4 E/ N! Z" A2 |2 t
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发表于 2023-3-14 14:10
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支持！
反对！