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发表于 2010-2-23 10:18:13
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\\.\com18是windows里边的SymbolLinkName，这个在WINAPI里边就需要这样写，SPCOMM的这部分的源代码如下：
procedure TComm.StartComm;
var
hNewCommFile: THandle;
begin
// Are we already doing comm?
if (hCommFile <> 0) then
raise ECommsError.Create( 'This serial port already opened' );
hNewCommFile := CreateFile( PChar(FCommName), <------就是这里，要加上\\.\
GENERIC_READ or GENERIC_WRITE,
0, {not shared}
nil, {no security ??}
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL or FILE_FLAG_OVERLAPPED,
0 {template} );
if hNewCommFile = INVALID_HANDLE_VALUE then
raise ECommsError.Create( 'Error opening serial port' );
^^^^^^^^^^^^^^^^^^^^^^^^^^^如果不是SymbolLinkName写法，串口号大于9这里就出错了 |
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