SPI Digital Waveform Library

[ram8421]

hi David,

 i have couple questions here...

1. what is the range of SCLK frequency this module will support??
2. what is the exact ratio need to be set between SCLK and sample rate??

Please clarify...

[RiyaKarmakar]

I am using SPI waveform library for working with HSDIO-6548. I have sent 24 bits of data to one of the customer device. The device is working great. Now the problem is I have to send 384 bits of data to the customer device for burst read and write . Can you help me with some code so that I can send these number of bits to HSDIO using SPI waveform library 

[Plantes]

Dear David,
I would like to know if there is a way to implement sequential byte send to a single slave with variable CS idle?
I attached below the desirable timing diagram.

timing diagram

Thank you in advance

Afonso Plantes

[Plantes]

Never mind, I have already solved it.

[PriyadarsiniS]

how can we control SS/ chip select line .. in SPI using HSDIO:

Is there any chance of making chip select (High) de-assert at middle bit of particular transactions without modifying the behavior of other signals (sclk, mosi, miso) in SPI Communication using HSDIO.

We can't help everyone, But everyone can help someone 

[PriyadarsiniS]

Is there any chance of making chip select (High) de-assert at middle bit of particular transactions without modifying the behavior of other signals (sclk, mosi, miso) in SPI Communication using HSDIO.

We can't help everyone, But everyone can help someone 

[rioriorio]

Hi, 

is this SDW can be used with NI 9402. David mentioned that

"We can only use the SDW waveform with a clocked digital I/O device"

I am really new with the labview and DAQ. please give me some advice

thanks

[rioriorio]

Hi Plantes,

Can you share with us how to set the CS idle time?

[stevesteve]

If you just want to send SPI data to a device (digital pot for example) the a 6509 works fine providing you don't need to send all the data very quickly.

In Labview configure a 8 line port as an output, use 3 of the lines for enable, clock, data. If there are 8 bits of serial data (plus start stop bits) to be sent, then make a sequence of 8 port writes (plus start stop). Then for each of the port write set the:

clock high & data (bit 1 value), write to port

wait a few mS

 clock low & data (bit 1 value), write to port

wait a few mS

The repeat for the other bits.

As its a port write then the clock & data will be in sync. It may take some 60mS or more in this example to do the complete write, but it does work.

[Plantes]

Hi rioriorio

I just changed SPI timing (ticks).Idle. Now, I can have differents CS Idles for my MOSI array.

[rioriorio]

Thank you Plantes