Pure SPI? #57

BOOM-Mentoring · 2021-01-13T18:03:37Z

How to make an SPI-only solution, that is, no USB -- A tool to program the CSR or QCC chips directly with SPI commands, say from an Arduino.

Which parts of this code would be needed?

Is a command map available?

lorf · 2021-01-14T04:09:47Z

Hi!

Csr-spi-ftdi only implements transport layer of the protocol, You would need to implement it in Arduino (see https://github.com/Frans-Willem/CsrSpiDrivers). On top of that You would need to implement functionality you want (e.g. flashing firmware, controlling the device with BCCMD or configuring it with PS Keys).

Here are some pointers:

Protocol analysis: https://web.archive.org/web/20190116215601/http://jernej87.blogspot.com/2012/10/csrs-usb-programmer-protocol-analysis.html
Flash dumper: https://github.com/lorf/csrprogrammer
BlueCore 4 flash programmer: https://web.archive.org/web/20180125112520/http://members.efn.org/~rick/work/rpi.csr.html
BlueZ stack has BCCMD implementation over other transports: https://github.com/bluez/bluez/blob/utils-3.36/tools/bccmd.c
Some useful information may be found by searching for "BlueSuiteSource_V2_5" and "BlueCore BCCMD Commands".

BOOM-Mentoring · 2021-01-14T06:19:08Z

Thank you, Lorf! Would you be willing to volunteer a little more time to help us solve this? We need some hand-holding on this. That would be fantastic, and i'd be super grateful. You’d be helping us uplift teens in-crisis. We don’t have the expertise in-house to follow those awesome clues you shared. We'll list you on our Advisers page. https://boo.ma/advisers The BOOM is a Resident at Autodesk, we won awards from Protolabs and Not Impossible Awards. We're a member of Engineers Without Borders. We've been featured in Make Magazine. Unfortunately, we're not funded, so we rely on volunteers. https://boo.ma/makezine Thx! John The BOOM Mentoring San Francisco, CA 94124 https://theboom.org https://facebook.com/bayviewboom https://twitter.com/bayviewboom