[問題] VC2010 writefile to RS232
開發平台(Platform): (Ex: VC++, GCC, Linux, ...)
VC++ 2010 Express
額外使用到的函數庫(Library Used): (Ex: OpenGL, ...)
vc內建的windows.h
問題(Question):
使用writefile這個function後
在想要輸入的字串中
char data[] = "0xFF";
想要送出1個byte 16進位資料如 0xFF 結果送出的字串被當成 4個bytes 0xFF
預期的正確結果(Expected Output):
送出RS232是1個byte以0xFF表示
錯誤結果(Wrong Output):
送出4個bytes的0xFF,應該是被當4個字元來看待
程式碼(Code):(請善用置底文網頁, 記得排版)
主要的部分:
char data[] = "0xFF";
DWORD size = (DWORD)strlen(data);
WriteFile( hFile, data, size, &dwBytesWritten, NULL);
補充說明(Supplement):
確定DCB設置都沒問題,COM1的機器也收的到
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※ 編輯: mjchicken (1.165.163.65), 07/31/2014 09:14:41
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※ 編輯: mjchicken (1.165.163.65), 07/31/2014 11:38:13
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