Michael Schnell schrieb:
On 02/18/2011 03:14 AM, Hans-Peter Diettrich wrote:
Quite a bit. Applications don't have to care about such hardware details,
Yep and this is why user land software can't (and should not) detect the
point in time the data it issued towards the serial port actually has
left the box. These systems (Windows, Linux, Mac) are not supposed to
support hard realtime after all.
There exists no guarantee for undisturbed transmission. Secure software
must be prepared to re-transmit the data, in its protocol, regardless of
realtime requirements. It's perfectly sufficient when the software is
informed that the next data packet can be supplied for transmission.
DoDi
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