Sets the transfer mode of the analog output
conversion data.
Format
Ret = AioSetAoTransferMode
( Id , AoTransferMode )
Parameters
Id
[ VB.NET : Short ] [ C, C++ : short ] [ C# : short ] [ Python : ctypes.c_short
]
Specifies the ID retrieved from AioInit function.
AoTransferMode
[ VB.NET : Short ] [ C, C++ : short ] [ C# : short ] [ Python : ctypes.c_short
]
Specifies the transfer mode from the following range.
0
Device
buffer mode
1
User
buffer mode
For the same device, if you want to use the
high-functional analog input and high-functional analog output at the
same time, it's necessary to unify the transfer mode.
Return value
Ret
[ VB.NET : Integer ] [ C, C++ : long ] [ C# : int ] [ Python : ctypes.c_long
]
Return values
Content
0
Normality
completion
7
Execute
AioResetDevice function
because the device has recovered from standby mode
10001
Invalid
Id was specified
Use the Id retrieved from AioInit
to specify the Id in this function.
10002
AIO
driver can't be called
At first, perform AioInit
function.
13580
The
value of AoTransferMode is outside the designated range of the
function
20001
This
function can't be used by this device
20002
Can
not use while by another device works
To use this function, analog output operation must be stopped.
20003
Can
not use because another process is using the device
When another process is using the device, all functions except
for those that support multi-process can not be performed.
23580
The
value of AoTransferMode is outside the designated range of the
device being used
Initial value
In all devices, AoTransferMode = 0
Remarks
Device
buffer mode
The output data
of the application are stored in device buffer memory carried
with the device or memory in the driver.
After the conversion
is started, the output data in device buffer are output to the
device.
Device buffer can
be used as FIFO memory or RING memory. (AioSetAoMemoryType)
Device buffer mode
can be used easier than User buffer mode, because the conversion
data are processed in the number of generatings and the function
that directly acquires the conversion data in Voltage is supplied.
And, we usually
recommend you use Device buffer mode, because we has supplied
the functionality for the most use.
User
buffer mode
Before the conversion
is started, you need register the application memory that stores
the conversion data. (AioSetAoTransferData)
After the conversion
is started, the conversion data are directly output to the device
via the driver.
You can select
whether the user buffer is "Overwrite the memory" or
the user buffer is "Not overwrite the memory." (AioSetAoMemoryType)
When the device
with the bus-master transfer functionality is used, the bus-master
transfer is automatically used in User buffer mode.
When the bus-master transfer is used, please select User buffer
mode.
This function cannot be used on devices without
the analog output function.
If the device is in operation, the function cannot be performed.
