DioInpByteSR

Function

Inputs a byte (8 bits) from an input port on the wireless I/O device.

Format

Ret = DioInpByteSR ( Id , PortNo , &Data , &Timestamp , Mode )

Parameters

Id [C:short] [Python: ctypes.c_short]
Specifies the device ID retrieved from DioInit.

PortNo [C:short] [Python: ctypes.c_short]
Specifies the logical input port number. The logical input port number is a number, which is assigned from the first input port of the device as 0 to the last one serially.

Data [C:unsigned char *] [Python: ctypes.POINTER(ctypes.c_ubyte)]
Specifies the address of variable to store the input datum.

Timestamp [C: unsigned short *] [Python: ctypes.POINTER(ctypes.c_ushort)]
Specify the address of the variable to store the timestamp.

Mode [C: unsigned char] [Python: ctypes.c_ubyte]
Specify where to refer to the input data.

Definition

Value

[Dec]

Description

DIONET_MODE_DIRECT

Refer to the input data of Terminal.

DIONET_MODE_AP

Refer to the input data of Gateway.

Return Value

Ret [C:long] [Python: ctypes.c_long]

Definition	Value [Dec]	Description
DIO_ERR_SUCCESS	0	Normal complete
DIO_ERR_DLL_INVALID_ID	10001	Invalid ID is specified.
DIO_ERR_DLL_CALL_DRIVER	10002	Driver cannot be called (failed in ioctl).
DIO_ERR_DLL_BUFF_ADDRESS	10100	Invalid data buffer address.
DIO_ERR_SYS_NOT_SUPPORTED	20001	This function cannot be used for this device.
DIO_ERR_SYS_PORT_NO	20100	Port number is outside of the specified available range.

The other errors: (See also: Error code details)

Initial Value

The initial value of the input datum is 0, if no external device is connected.

Remarks

Inputs a byte (8 bits) from the input port. When getting the necessary information of the bit, please use the bit operators of each language.
To acquire data, there are two methods. One is acquiring data stored in master unit, the other one is acquiring data directly from slave unit.
Please refer to the wireless I/O specification for features of each acquisition method.

For the data acquisition method, when acquiring the data stored in the master unit, you can acquire the time stamp of the data stored in the master unit.
The time stamp returns the time since the last update in seconds.
If the time stamp is longer than the update interval of the slave unit, the data from the slave unit is not reaching the master unit for some reason.
Please use it to check the validity of the data saved in the master unit.

Example

C	Ret = DioInpByte ( Id , PortNo , &Data , &Timestamp , Mode );
Python	Ret = cdio.DioInpByte ( Id , PortNo , ctypes.byref(Data) , ctypes.byref(Timestamp) , Mode )