Information générale
Catégorie:
Fonctions Windows API
I need use Windows API control the serial port,But I don,t know,What,s Wrong transmit data unsuccess.
This is my Code:
#DEFINE GENERIC_READ 0x80000000
#DEFINE GENERIC_WRITE 0x40000000
#DEFINE OPEN_EXISTING 3
#DEFINE FILE_FLAG_OVERLAPPED 0x40000000
DECLARE INTEGER CreateFile IN kernel32;
STRING lpFileName, INTEGER dwDesiredAccess, INTEGER dwShareMode,;
INTEGER lpSecurityAttributes, INTEGER dwCreationDisposition,;
INTEGER dwFlagsAndAttributes, INTEGER hTemplateFile
DECLARE INTEGER CloseHandle IN kernel32 INTEGER hObject
DECLARE INTEGER WriteFile IN kernel32 INTEGER hFile,;
STRING @ lpBuffer,INTEGER nBt2Write,INTEGER @ lpBtWritten,INTEGER lpOverlapped
DECLARE INTEGER ReadFile IN kernel32 INTEGER hFile,;
STRING @ lpBuffer,INTEGER nNumberOfBytesToRead,INTEGER @ lpNumberOfBytesRead, INTEGER lpOverlapped
ICDEV = CreateFile('COM1', GENERIC_READ+GENERIC_WRITE, 0,0,;
OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0)
outdata=chr(65)+chr(66)+chr(67)
indata=space(6)
LOCAL j,p
j=0
&&What,s wrong WriteFile unsuccess
a=WriteFile(ICDEV,@OUTDATA,3,@j,0)
b=ReadFile(ICDEV,@indata,3,@j,0)
= CloseHandle(ICDEV)
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