Sending (sequential) break using windows (XP +) api

Question

Is there a better way to send a sequential break, then a setcommbreak - delay - clearcommbreak sequence?

I need to contact a microcontroller that uses serial break as the start of a 115k2 packet, and setcommbreak has two problems:

• with 115k2, the gap is well below 1 ms and it will receive a critical time.

• Since the gap should be embedded in the packet stream in the correct position, I expect problems with fifo.

Is there a better way to do this without moving serial communication into a stream without fifo? UART is usually 16550 +

I have a choice in the sense that the microcontroller setting can be switched (other firmware) to a more conventional batch format, but the manual warns that the “split” method involves checking the integrity of the serial interface hardware.

The compiler is Delphi (2009 / XE), but any code or even just a link is welcome.

Answer 1

The short answer is that serial programming with Windows is pretty limited: - (

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