Справочник Пользователя для National Instruments 321645c-01

Chapter 2

Function Reference — RTSI_Clock

©

 National Instruments Corporation

2-287

NI-DAQ FRM for PC Compatibles

Connects or disconnects the system clock from the RTSI bus if the device can be programmed 
to do so. You can connect or disconnect the other device system clock signals to and from the 
RTSI bus using jumper settings.

connect indicates whether to connect or disconnect the system clock from the RTSI bus.

0:

Disconnect.

1:

Connect.

dir indicates the direction of the connection. If connect is 0, dir is meaningless.

0:

Receive clock signal from the RTSI bus trigger line.

1:

Transmit clock signal to the RTSI bus trigger line.

RTSI_Clock

 can connect the onboard system clock of an AT-MIO-16X, AT-MIO-64F-5, 

AT-AO-6/10, or a DIO 6533 (DIO-32HS) to the RTSI bus. Calling 

RTSI_Clock

 with 

connect equal to 1 and dir equal to 1 configures the specified deviceNumber to transmit its 
system clock signal onto the RTSI bus. You do not need to specify a RTSI bus trigger line 
because NI-DAQ uses a dedicated line. Calling 

RTSI_Clock

 with connect equal to 1 and dir 

equal to 0 configures the specified deviceNumber to use the signal on the RTSI bus dedicated 
clock pin as this device system clock. In this way, the two devices are controlled by a single 
system clock.

Calling 

RTSI_Clock

 with connect equal to 0 disconnects the clock signal from the RTSI bus. 

RTSI_Clear

 also disconnects the clock signal from the RTSI bus.

i16

assigned by configuration utility

i16

connect or disconnect the system clock

i16

direction of the connection