WIZ550io Using LabView

TCP/IP Chip W5500
1

Hello!

My WIZ550io respond to ping normally. Using LabView TCP read function fails. IP address is set to 192.168.1.2 and port to 10002.
I would like to communicate through SPI with LMP90100 (National Semiconductor) sensor interface chip. It is possible to do this with WIZ550io?

2

Hi,

Yes, you can. Read sensor data and then send the data to WIZ550io.

3

Hello Franci,
you must make sure to work with SPI in Variable Length Date Mode (VDM) and act with 2 separate CS to select the SPI device and communicate through a bit banging protocol.
The Wiz550io can also work in FDM (fixed length data mode), but that will not work with other SPI devices because it does not release the MISO ( see 2.3 W5500 datasheet section ).