Readme.md

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?

• Client side
• Server side
• PFGA bin

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