Skip to content
Permalink
Branch: master
Find file Copy path
Fetching contributors…
Cannot retrieve contributors at this time
106 lines (50 sloc) 2.24 KB

20180506a - SPI timing on Raspberry

The objective of this experiment is to test what is the limiting factor on the Raspberry Pi communication.

With a clock set at 200khz or 16MHz, the transfer speed is the same. Does this lie with the overheads?

Clock issues

Original clock at 200khz

One sees 8 bits for 4us, that's around 500khz

CS is down during 10us

90us between 2 bytes

Boosting the clock to 15Mhz

Now 8 bits are less than 1 us, I'd say around 800ns

Same 90us delay between two bytes

Automated list of supporting files for the experiment 20180506a

List of files

md

python

Modules

Images of the Experiment

Others

Understanding lag in Raspberry Pi SPI (category: oscilloscope).

Understanding lag in Raspberry Pi SPI (category: oscilloscope).

Understanding lag in Raspberry Pi SPI (category: oscilloscope).

Understanding lag in Raspberry Pi SPI (category: oscilloscope).

Understanding lag in Raspberry Pi SPI (category: oscilloscope).

[](@autogenerated - invisible comment)

You can’t perform that action at this time.