AioStartAiSync

Function

Start AD conversion based on the condition settings. This function returns after A/D convert finished.

Format

Ret = AioStartAiSync ( Id , TimeOut )

Parameters

Id [ C, C++ : short ] [ Python : ctypes.c_short ]
Specifies the Device ID retrieved from AioInit function.

TimeOut [ C, C++ : long ] [ Python : ctypes.c_long ]
The timeout period until the function returns is specified in millisecond.
If 0 is specified, it keeps waiting until operation stops.

Return value

Ret [ C, C++ : long ] [ 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.
12382	Timeout occurred. Please reset the device, or extend the timeout period.
20001	This function can't be used by this device
20002	Can not use while by another device works To use this function, analog input 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.
21460	Because sampling clock period error occurs, you must reset a device
21461	Virtual memory can't be allocated Memory is insufficient. Terminate the unnecessary applications.
21463	In the software start, set up the repeat number in 1
21466	A user buffer isn't set up
21469	Buffer overflow error occurred, you must reset a memory

Remarks

When this function is executed, AD conversion is started based on the set condition.
The sampling clock period error and AD conversion error are automatically reset.

If Device buffer is used, the memory in the device are not reset. If the older conversion data exists in the memory, the latest conversion data are stored after the older data.
If User buffer is used, the conversion data are stored from the head of buffer whose memory is reset when perform this function.

AioStartAi function returns processing at once after it executes it.
But, AioStartAiSync function doesn't return processing until either of the following conditions consist though.
- Operation end of device
- Operation stop by overflow, and sampling clock period error, etc.
- Generation of time-out

This function cannot be used on devices without the analog input function.
This function can be executed if the device is in operation.

Example

Start AD conversion without time-out.

C, C++	long Ret; Ret = AioStartAiSync ( Id, 0 );
Python	Ret = ctypes.c_long() Ret.value = caio.AioStartAiSync ( Id, 0 )