[心得] 因為在這裡找到好多資料希望對想了解RS …
分享一下 有錯請大力的噓下去謝謝你
/*
This is a test program for receiving data from other computer.
RS-232 Test:
RS-232 male
-------------
\ 1 2 3 4 5 /
\ 6 7 8 9 /
---------
To send and to receive data on your computer
when you connect pin 2 and pin 3 togeter.
To connect your RS-232 like this
-----------------------
\ --- --- /
\ 1 |2|--|3| 4 5 /
\ --- --- /
\ 6 7 8 9 /
---------------
Albert Liu
10,10,2010
*/
#include <windows.h>
#include <stdio.h>
#include <conio.h> //for _getch() and _kbhit();
#include <string>
#include <cmath>
using namespace std;
int main(){
//To declare a handle for your comport
HANDLE hComm;
//To declare an object for setting the Comport
DCB dcb;
//To declare a string for saving temp string.
string Temp;
//To declare some variables for receiving massage
char inbuff[1024];
DWORD nBytesRead,dwError;
COMSTAT cs;
//end// for receiving
//To declare some variables for keybord control
int ky,end=FALSE;
//end// for keybord control
//To declare a delay timer.
int T_dela=0;
//To declare some variables for sending massage
const char *SendData;
unsigned long lrc, BS;
char str1[]="I am a test string.";
printf("%s\n",str1);
//end// for sending
//To open COM3 for this program
hComm = CreateFile("COM3", //usually "COM1" or "COM2"
GENERIC_READ | GENERIC_WRITE,
0,
NULL,
OPEN_EXISTING,
0,
0);
//It will turn off the program
//when it can't find any comport to connect
if (hComm == INVALID_HANDLE_VALUE){
printf("wrong port connection.\n");
return 0;
}
//To get COM3 state
GetCommState(hComm,&dcb);
//To set COM3 parameters
dcb.BaudRate = CBR_9600;
dcb.fOutxCtsFlow = FALSE;
dcb.fRtsControl = RTS_CONTROL_DISABLE;
dcb.fDtrControl = DTR_CONTROL_DISABLE;
dcb.fOutxDsrFlow = FALSE;
dcb.fOutX = FALSE;
dcb.fInX = FALSE;
dcb.ByteSize = 8;
dcb.Parity = NOPARITY;
dcb.StopBits = ONESTOPBIT;
//end// COM3 parameters
//To set the parameters to COM3 now
if (!SetCommState(hComm, &dcb)){
printf("setting error.\n");
return 0;
}
//Clearn COM3 data
PurgeComm(hComm, PURGE_RXCLEAR);
//To give Temp a string.
//you can set input here
Temp=str1;
SendData = Temp.c_str();
BS=strlen(SendData);
//sending data now
WriteFile(hComm, SendData,BS,&lrc,NULL);
//To count how many time have to delay for sending data.
T_dela=(int)ceil((double)ceil((double)(BS*8)/6)*8/(dcb.BaudRate*0.001));
// 1 char = 8 bit so BS*8
Sleep(T_dela);
//to find the error or receiving COM3's state.
ClearCommError(hComm,&dwError,&cs);
if (cs.cbInQue > sizeof(inbuff)){
PurgeComm(hComm, PURGE_RXCLEAR);
printf("your massage is too big\n");
return 0;
}
//To read the data from COM3 when you push "Esc".
while (!end){
//when you hit the key bord
if (_kbhit()){
//to get the button you hit
//'\x1B' = "Esc"
if((ky = _getch())=='\x1B'){
//to read the data from COM3 now
ReadFile(hComm,
inbuff,
cs.cbInQue,
&nBytesRead,
NULL);
//break;
end = TRUE;
}
}
}
//To add a char '\0' to the end of the string.
inbuff[cs.cbInQue]='\0';
printf("I get this massage = %s \n",inbuff);
return 0;
}
我測試好多次了如果不是貼上來被換了字應該可以動
希望對你有幫助
按"Esc"之後會秀出
I get this massage = I am a test string.
記得把你的RS-232要接腳
2(RXD 接收資料)跟3(TXD傳送資料) 接起來喔(用電線接起來>.<)
確認以上(硬體軟體)都對了以後如果編譯還是不能過
MS Win2003 R2 PSDK 去 google 搜索這個安裝一下
參考資料：
C++ Builder與RS-232 串列通訊控制 文魁資訊
串列資料傳送技術入門 建宏出版社
Window 下之馬達控制入門 全華科技圖書股份有限公司
PTT.cc C/C++ 板
PTT的大大 clarkman
http://msdn.microsoft.com/en-us/library/ms810467.aspx
--
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