RTK basic settings

In the basic setting you define the following:

Source for the Timertick
CPU on which the RTK is carried out
Basic time as basis for the multiplication factor for the calculation of the cycle time

Timer for real-time source

Which time is displayed on the selection list depends on the used hardware. This information is also displayed on the start page of the RTK configuration. Available can be:

Interrupt-Controller APIC
Interrupt-Controller PIC
HPET (High precision event timer)

The follwoing possibilities arisefrom this:

PIC without HPET
- Timer (8254 Timer), basic times: 334 µs, 143 µs, 112 µs, 53 µs
- Profiles (real-time clock), basic times: 488 µs, 244 µs, 122 µs
APIC without HPET
- Profiles (real-time clock), basic times: 488 µs, 244 µs, 122 µs
- Profiles (local APIC), basic times: choose anywhere between 50 - 500 µs
- Unused (8254 Timer), basic times: choose anywhere between 50 - 500 µs
APIC with HPET and Windows VISTA
- Timer (HPET timer o), basic times: 500 µs, 250 µs, 125 µs
- Profiles (local APIC), basic times: choose anywhere between 50 - 500 µs
- Unused (HPET timer 2), basic times: choose anywhere between 50 - 500 µs

Whether and to what extend basic times are available depends on the hardware (real-time clock) and the operating system. When using the 'timer' real-time source, the source for the Windows Timer Interrupt is used for the real time execution. In this case the set basic time must be an integral factor of the Windows Timer Interrupt basic time.

Real time source: depends on the operating system Select using list field (drop down).

We recommend the following basic setting: Unused (HPET Timer2).

Real time CPU: Select the CPU on which the process of the RTK should be carried out.

Basic time: Basic time of the timerticks. Depending on the real time source, the basic time is selected from a list or entered freely. During operation the multiplication factor for the timer ticks refers to the entered basic time.

Attention

When using Profile: real time source the kernel profiling must not be activated under any circumstances as long as a straton RTK application is executed. For more information about kernel profiling see: http://www.microsoft.com/downloads/details.aspx?familyid=9d467a69-57ff-4ae7-96ee-b18c4790cffd&displaylang=en