1 type-specific errors, 2 analog input modes – Sensoray 2600 User Manual
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Sensoray 2600 Programming Guide
38
Gateway Action Scheduling
7.6.1 Type-Specific Errors
In addition to the common IOM status bit flags (
STATUS_RST
and
STATUS_CERR
), this IOM type supports the following
type-specific flags. If any of these flags are asserted, a transaction error of type
GWERR_IOMSPECIFIC
will be generated:
7.6.2 Analog Input Modes
Input mode registers allow to set timing parameters of the analog-digital conversion for each channel. The enumerated
oversample ratio settings
,
speed multiplier
and
reference voltages
type names are defined in the
App2600.h
header file.
7.6.3 S26_Sched2612_SetMode()
Schedules the programming of the measurement mode for one channel on model 2612 IOM.
Prototype:
u32 S26_Sched2612_SetMode( XACT x, IOMPORT IomPort, u8 chan, u32 mode );
The
mode
parameter contains the OSR (oversample ratio) selector and speed multiplier enable bit:
Returns:
Error code as described in section 5.5. Zero is returned if the operation was successful.
Symbolic Name
Description
STATUS_2612_OVERFLOW
Differential input voltage exceeds ADC positive input limit.
STATUS_2612_UNDERFLOW
Differential input voltage exceeds ADC negative input limit.
STATUS_2612_EEPROM
EEPROM read/write error. This flag will be asserted if the 2412’s internal EEPROM checksum is invalid.
This can happen if S26_2612_RestoreCalibrations() is called before
S26_2612_RestoreCalibrations()
has been called at least once for the target channel.
Parameter
Type
Description
x
void *
Transaction handle obtained from S26_SchedOpen().
IomPort
u8
The IOM port number (on the MM) to which the target IOM is connected.
chan
u8
The channel number that is to be programmed. Legal values range from 0 to 3.
mode
u32
One of the OSR symbolic constants. To use t
he speed multiplier mode
, the MODE_2X
symbolic constant must be ORed with the OSR.
0
31
20
0
0
0
0
0
0
0
0
19
24
OSRSEL
8
16
The
OSRSEL
field selects the oversample ratio, which in
turn configures a number of other behavioral attributes.
Any of the following values may be specified:
The
M
bit enables the speed multiplier when set to logic
one, and it disables the multiplier when set to zero.
When enabled, the speed multiplier doubles the
conversion rate at the expense of one additional cycle
of latency.
The most significant nibble must be set to 0xA. All
other bits, which are reserved for future use, must be
set to zero.
OSRSEL
OSR
RMS
Noise
(µV)
Convert
Rate
(Hz)
First
Notch
(Hz)
–3dB
Point
(Hz)
Effective
Bits
1
64
23
3515.6
28125
1696
17.0
2
128
4.5
1757.8
14062.5
848
20.1
3
256
2.8
878.9
7031.3
424
20.8
4
512
2.0
439.5
3515.6
212
21.3
5
1024
1.4
219.7
1757.8
106
21.8
6
2048
1.1
109.9
878.9
53
22.1
7
4096
0.72
54.9
439.5
26.5
22.7
8
8192
0.53
27.5
219.7
13.2
23.2
9
16384
0.35
13.75
109.9
6.6
23.8
15
32768
0.28
6.875
54.9
3.3
24.1
M
0
0
0
0
0
0
0
0
0
0
0