SPI Arduino MEGA 2560 + LabView

[JSebastian]

excuse me, it was 5 us

[Nathan_B.]

That is strange that you would get that error with my VI.  Did you use my VI unmodified?  If yes, I would try and probe the "SPI Data" wire and the output of "Array Size" in "SPI Send Receive.vi" while it's running to see what is actually being sent to the subVI.

[JSebastian]

Yes, I used your VI unmodified.

I just got a good CS in pin 53. I tried with several DIO pins.

Later I check all block diagram for any problem to SPI Data because I always got the 8 most significant bits.

00101010

[Nathan_B.]

Any DIO pin should work for the CS (Chip Select).  Pin 53 is designated as SS (Slave Select) which is only required when the Arduino is being used as a SPI slave device.

[JSebastian]

I am going to do proofs today again.

Later I write you how they were

[JSebastian]

Hello Nathan. Today I got those signals at oscilloscope.

I tried transfering 1100101010101010.

Yellow signal is SPI Data (pin51) and blue signal is clock signal.

I don't know why bits sent don't have a continous transfer...first 8 MSB are sent.

I need 16 bits are sent continuosly.