MDIO to RS232 communication

[scott.F]

I am trying to communicate with Puma AEL1002 board from Aeluro using Labview. It has MDIO (Management data nput/output) interface. I know the format: 32 bit preamble (all 1), 2-bit start of frame, 2-bit Opcode, 5-pit port address, 5-pit device address, 2-bit turnaround, 16-bit address/data, totally 64 bits for each command.

There are some software writen in C. But I know very little about C, always use Labview.

Can anybody give me a example ? I tried to use Visa write/read command to send hex in the case structure, it just doesn't work.

I probablly can get C code, if so, can anyone help me to combine it into Labview?

Thank you very much

Scott.F

[Henrik_Volkers]

Doesn't sound like a RS232 communication..., however you seem to have a cable to plug in the RS232 port

So I assume the device is using the hardware handshaking lines (DTR,CTS,CTR...) to establish a communication with DI,DO&CLK  and some voltage level circuitry is build in the rs232 plug. Correct?

Then the next would be to find out what RS232 line is used for DI,DO&CLK  and use the VISA property node to toggle the lines, resp. to read the line status to send and receive data.

[scott.F]

Hi Henrik,

You are right, there is a converter between RS232 to MDIO. I will follow your suggestion. Need to ask my friend about D1, D0 and clock.

Thank you so much

Scott F

[Henrik_Volkers]

A nice general information on rs232:  http://www.arcelect.com/rs232.htm

or search the NI site.

One way to find out: With a scope compare the flow control lines with the MDIO lines to find out which lines are used.

Dno't be afraid to rate a good answer

[kevin1234]

HI:Scott.F

Can you give the sample vi for me，I have same problem ---how get the mdio with labview？

kevin

[JÞB]

Kevin

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