April 1, 2014 AT 4:00 am
From the Forums – Beaglebone Black SPI with Microchip 25LC512 #beagleboneblack @TXInstruments @beagleboardorg
“Maddox” on the Adfruit Forums shared Beaglebone Black SPI with Microchip 25LC512:
As a learning experience, I got a little microchip flash chip (25LC512) working with my BBB. I thought the steps I went through and performance observed could be useful to others, so I wrote a blog post about the details here with links to the git repo for code and performance traces from my Saleae logic analyzer (wonderful tool).
Synopsis:
SPI through libsoc library can issue commands every ~100 usec (observed between 77 and 125 usec). Random 1 byte reads can complete every ~100 usec as well. 128 bytes can be transferred from the BBB to/from the 25LC512 in ~200 usec. A long block of sequential reads run at about 640 KB/s….
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