USB VISA WRITE 4 bytes to FPGA

[Rajesh$]

hi, 

i am new to lab view. 

my requirement is:

i have to sent some(5)  bytes of data to FPGA. 

using VISA WRITE function.

i have tried using some VI's available as example. 

but showing some errors.

please review my code(attached) and suggest to overcome the issue.

[Rajesh$]

attachmets

[GerdW]

Hi Rajesh,

to send data to your FPGA you should use either access FPGA control directly or use a FIFO.

Both ways are explained in the example projects coming with LabVIEW RT and FPGA module!

(I guess you talk about a LabVIEW project involving a NI FPGA target, don't you?)

[Rajesh$]

no its NOT NI FPGA.

its xilinx FPGA . it has USB port. so i am using VISA.

I am accessing using NI VISA. 

[GerdW]

Hi Rajesh,

sending 5 bytes is quite easy:

[Rajesh$]

i am not able to find the < array of U8> pallets.

i got all except < array of U8> 

[GerdW]

Hi Rajesh,

this is just a numeric array control labelled "array of U8" to make the datatype of that array clearly visible…

(Ofcourse that array needs to contains atleast 5 elements to be able to send 5 bytes. Btw. why did you change the subject line of your messages from "5" to "4"?)

[Rajesh$]

Is it the same pallet which you mentioned ?

please confirm ?

[Rajesh$]

typing mistake : 4 to 5

[GerdW]

Hi Rajesh,

I labelled that array as "array of U8", but you created an "array of I32" instead.

I wonder why you did that…