Eagle Technology PC104PLUS-26, Руководство пользователя

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PCI 730 & PC104P-30 User Manual Eagle Technology - Data Acquisition
ClkSrc Unsigned long This parameter is used to configure the clocking system of the ADC.
Format
Offset (bits) Description
0 Clock Source
ALLWAYS INTERNAL
8 Trigger Source (T0-T3)
Value Description
0 Internal
1
External – EXT_TRIGGER
Example Layout:
11 10 9 8 7 6 5 4 3 2 1 0
T3 T2 T1 T0 x x x x x x x x
Burst Unsigned long Not used
Range Unsigned long Not used
ChanList Pointer to an
unsigned long This is an array of unsigned longs which contains the channels to be sampled when scanning the ADC
sub-system. The max size of the channel list is half the FIFO depth.
GainList Pointer to an
unsigned long The gain list contains an array of unsigned longs which specifies the setup for each channel according to
the previous list. The table below shows the format for each channel.
Offset (bits) Description
0 Specifies the gain of the channel
Value Gain Range
0 1
±
2.5V
1 0.5 ± 5V
2 0.25 ±
10V
8 Specifies the input mode of the channel
Value Input Mode
0 Single Ended
1 Differential
Example Layout:
11 10 9 8 7 6 5 4 3 2 1 0
M
3
M
2 M
1 M
0 G
7 G
6 G
5 G
4 G
3 G
2 G
1 G
0
ListSize Unsigned long This parameter determines the length the two previous arrays. This is also the depth of the channel list
that is programmed to the board.
1.1.1.1 Digital triggering
If digital triggering is used, pin EXT_TRIGGER is used. This pin is active high and will start
the ADC process when it is high. The process will continue until it is stopped via software.
ACTIVEX CALL
Long EDREADX.Configure (plong Channels, plong Gains, long ListSize)
Parameter Type Description
Channels Pointer to a
long This is an array of longs that contains the channels to be sampled when scanning the ADC sub-system.
The max size of the channel list is half the FIFO depth.
Gains Pointer to a
long The gain list contains an array of longs that specifies the setup for each channel according to the
previous list. The table below shows the format for each channel.
Offset (bits) Description
0 Specifies the gain of the channel
Value Gain Range
0 1
±
2.5V
1 0.5 ±
5V
2 0.25 ±
10V
8 Specifies the input mode of the channel.
Value Input Mode
0 Single Ended
1 Differential
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