On Tue, 1 Sep 2020 20:31:57 +0200 (CEST), Michael Van Canneyt via fpc-pascal <fpc-pascal@lists.freepascal.org> wrote:
>Yes, but you can only override a virtual constructor. The TThread >constructor is not virtual. I am doing the setup in a different way so I don't have to use Create. My new FpSerialPort works fine now with the simple test application. But now I have to plug it into the larger service app I am porting and I have come across a piece of code where the alternative com port classes used on Windows have a way to check how many bytes are in the outgoing buffer ready to be transfered. The existing code waits until there are less than 16 bytes left to transfer before it fills the Tx buffer with another packet of 512 bytes. In order to do this it checks the state of the Tx buffer: Using LazSerial (Windows and Linux): while FComm.SynSer.SendingData > 16 do (waiting for it to empty) Using AsyncPro (Windows): while FComm.OutBuffUsed > 16 do Using an older but simpler serial comp on Windows: while FComm.TxWaiting > 16 do Is there anything comparable available via the serial unit? I have not found anything so I guess it has to be an addition to get it done.... The binary data to send can in worst case be 1 Mbytes in size even though normally it varies between 1 and a few hundred bytes per operation. Any suggestions? -- Bo Berglund Developer in Sweden _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org https://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
