IOWarrior 24 Outpout Max Rate

[manurc]

Hi everyone
I whish to use a IOWarrior 24 to drive a CNC milling machine, my software is written with delphi 2005 using the iowkit.dll
I use port0 to drive a 74hc245 to set the step inputs of the motor drivers

normally, I should send an output info every 1 ms, but the iowritte instruction seem to limit to 5 ms between each new output

i tried to set the IOWritteSetTimeOut value to 1, but there is no communication any more

Is there a way to get a higher speed ?

Thanks
Manu

[Guido Körber]

The speed you can achieve in output direction depends on the USB host controller in your computer. If it is a UHCI controller then 3msec is the fastest the hardware will go, for OHCI it is about 0.3msec.