Delphi使用spcomm串列埠通訊 串列埠號大於10出錯的解決辦法 spcomm error opening serial port
阿新 • • 發佈：2019-02-06
//./com18是windows裡邊的SymbolLinkName，這個在WINAPI裡邊就需要這
樣寫，SPCOMM的這部分的原始碼如下：
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), & lt;------就是這裡，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寫法，串列埠號大於9這裡就出錯了
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), & lt;------就是這裡，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寫法，串列埠號大於9這裡就出錯了