GxAoDioSetClock

Purpose

Sets the DIO clock source and frequency.

Applies

GX1649, GX1649-1

Syntax

GxAoDioSetClock (nHandle, nClockSource, dFrequency, pnStatus)

Parameters

Name
Type
Description
nHandle
SHORT
Handle to a GX1649 board.
nClockSource
SHORT
 
Sets clock source:
0.   GXAO_1649_CLOCKSOURCE_INTERNAL
1.   GXAO_1649_CLOCKSOURCE_EXTERNAL
2.   GXAO_1649_CLOCKSOURCE_PXI0
3.   GXAO_1649_CLOCKSOURCE_PXI1
4.   GXAO_1649_CLOCKSOURCE_PXI2
5.   GXAO_1649_CLOCKSOURCE_PXI3
6.   GXAO_1649_CLOCKSOURCE_PXI4
7.   GXAO_1649_CLOCKSOURCE_PXI5
8.   GXAO_1649_CLOCKSOURCE_PXI6
9.   GXAO_1649_CLOCKSOURCE_PXI7
10. GXAO_1649_CLOCKSOURCE_STAR_TRIGGER
11. GXAO_1649_CLOCKSOURCE_GROUPA
dFrequency
DOUBLE
Sets DIO frequency, this is only relevant when pnClockSource is control by the card internally (GXAO_CLOCKSOURCE_INTERNAL)
pnStatus
PSHORT
Returned status: 0 on success, negative number on failure.

Comments

Default clock source is GXAO_CLOCKSOURCE_INTERNAL with frequency of 10MHz GXAO_CLOCKSOURCE_GROUPA can only be used when nGroup is set to B, C, and D, using group A clock source will synchronizes all group channels to use the same clock source as group A.

Example

The following example sets group A with clock source of internal with frequency of 5MHz:

 

SHORT nStatus;

 

GxAoDioSetClock (nHandle, GXAO_GROUPA, GXAO_CLOCKSOURCE_INTERNAL, 5000000, &nStatus);

 

See Also

GxAoDioGetClock, GxAoGetErrorString