Products > Test Equipment
Capture 2 minutes SPI traffic and save it
dietert1:
The scope variant will be limited to 200 MSamples. In order to log 2 minutes that is about 1 MHz sampling, which isn't good enough for most SPI. Often SPI works at clock frequencies of several MHz up to 50 MHz or so.
That's why i thought about making a SPI sniffer, that can handle those higher clock rates without producing a vast overhead.
It could use some GPIOs as inputs for the nCS signals to tag recorded SPI transactions per bus device.
Regards, Dieter
TomKatt:
The $149 DSlogic Plus LA can stream 3 channels at 100MHz (or 6 channels at 50MHz) sampling rate over usb to pc for ~160 seconds. The $299 DSLogic U3Pro16 is USB3 and can stream 6 channels at 500MHz. Their DSview software is based on Sigrok Pulseview and has basically the same feature set, including SPI decoding.
Depending on the task, I often switch between scope and LA for serial comms work. The LA is great for decoding, but only the scope can identify signal issues (timing, missing or runt pulses, etc).
pilot5599:
Thanks everyone!
I figured out the way to save the memory in csv format. I also found out how to configure the scope to decode the digital channels.
Thanks again!
Navigation
[0] Message Index
[*] Previous page
Go to full version