user_cvt_data_from_device| CIMPLICITY 11.1 Documentation

Converts data from the general toolkit format to a format compatible with the given point type.

The Device Communications Toolkit calls user_read_data() to read data for multiple points at the same address. The data returned by user_read_data() should be in a format consistent with the device domain and the host data format.

For example, data from a word domain should be returned in little endian format (least significant byte first). If data in the device is in big endian format (most significant byte first), you should byte swap the data within user_read_data().

The Device Communications Toolkit calls user_cvt_data_from_device() for individual points to perform data conversions specific to the point data type.

For example, if the point data type is INT (16 bit integer), it may be necessary to byte swap the little endian data returned from user_read_data().

You can find the template for this subroutine in:

usrtm_cvtfrom.c

Syntax

void user_cvt_data_from_device ( DEVICE_DATA *device_struct,
??????????????????????????????????????????????????????????????????ADDR_DATA *address_struct,
??????????????????????????????????????????????????????????????????int element_cnt,
??????????????????????????????????????????????????????????????????int element_size,
??????????????????????????????????????????????????????????????????int pnt_data_type,
??????????????????????????????????????????????????????????????????char *data_buffer)