USB 6008 SPI

[CalosGonzalez]

Good afternoon:

Can be implemented SPI communication with the NI6008? What channels are used for MISO, MOSI, SCK, SS? Is there any example?

Thank.

[johnsold]

No. The USB-6008 has only software timed digital inputs and outputs. The maximum update rate is ~150 Hz with significant timing jitter.

Lynn

[CalosGonzalez · Accepted solution]

Ok, Thank. After publishing query, I found the next post: http://forums.ni.com/t5/Multifunction-DAQ/SPI-device-with-NI-USB-6009/td-p/603919

[nathand]

I haven't tried this, but I suspect you could make it work, just really really slowly. You would need to generate a sequence like set clock high and MOSI line, set clock low, read MISO line, repeat. You can use whichever digital lines you want for each purpose since you'll have to write all the code yourself. You might be able to find a pure software-timed example somewhere on this forum, I think I saw one once.

[nathand]

Here's the thread with a purely software-timed SPI implementation: http://forums.ni.com/t5/Digital-I-O/Implementing-I2C-or-SPI-with-Pxi6508-in-Labview/td-p/554383 I've only briefly looked at the code and never ran it, but I don't see any reason that it couldn't be used as a model for a master-only implementation on a USB-6008.