Also I m going to do a session on chip bringup at the next E open-source-silicon.dev #mpw-6plus-silicon

Also, I'm going to do a session on chip bringup at...

Matt Venn

01/19/2024, 12:31 PM

Also, I'm going to do a session on chip bringup at the next Efabless webinar. What kind of things do you want me to demonstrate?

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Matt Venn

01/19/2024, 12:32 PM

I'm thinking show: • simple firmware to toggle leds • flashing firmware and check it's working • use hkdebug to get chip id information • use hkdebug to enable / setup PLL • send serial data from caravel to the host PC • use the logic analyser • use the wishbone bus Anything else that would be useful?

htamas

01/19/2024, 5:33 PM

If there is enough time, I would add * use hkdebug to reboot caravel without disconnecting usb * reconfigure the io pads * use the bidirectional/monitored modes to access io_in/io_out from firmware * make PLL setup persistent by writing the registers from firmware * use an external clock via xclk and the J6 jumper * receive serial data from the host

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Anton Maurovic

01/20/2024, 6:10 AM

Maybe worth a mention: old firmware API (direct named register reads/writes) vs. new (function calls as abstractions) -- are both usable on MPW6 (and all since)? I gather the new API, e.g. with

GPIOs_configure(…)

, is strongly recommended

Anish

01/20/2024, 8:49 AM

using hkdebug to directly interface with the IOs using the monitored interface is pretty handy I'd think

Anish

01/20/2024, 8:49 AM

doing that via Python from a host computer was definitely easier than trying to do it from firmware in my experience

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