Deep Dive w/Scott: Raspberry Pi Testing

Adafruit Industries

Join Scott as he continues to test CircuitPython on the Raspberry Pi. No Deep Dive next week. Links: https://adafruit.com https://adafru.it/discord https://github.com/adafruit/deep-dive-notes https://github.com/raspberrypi/firmware/wiki/Mailbox-property-interface https://www.raspberrypi.com/documentation/computers/processors.html https://forums.raspberrypi.com/viewtopic.php?t=72260 0:00 Getting started 0:03:27 Housekeeping 0:07:02 not talking about esp-s3 today :-) 0:07:28 working on CP reliability 0:08:31 BCM2711 datasheet - “precautions for correct memory ordering” read and write barriers 0:11:20 Does anyone know if the feather interface handles I2S?I'm thinking about making an Audio Codec feather board. 0:11:50 Does anyone know if the feather interface handles I2S?I'm thinking about making an Audio Codec feather board. 0:13:10 When you hit a problem on this project, do you ever jump over to the Pi OS source code - to see how they implement what it is you are struggling with - to get clues on how to proceed? 0:14:30 facebook tftp server ( fbtftp python implementation of tftp server)? 0:17:26 twitch off/on to reset 0:20:00 examine the build system (CI / continuous integration) on github 0:21:00 submodule dependency optimizations 0:23:45 live watching on youtube has some lag due to closed captions 0:24:25 would i need a debug hat hat or soldered-up SWD to help test? haven't done that on a RPi Zero 2 yet 0:25:58 Mailbox code 0:29:41 consider switching to Pie Zero 2 0:35:04 pi imager complete / sync 0:36:32 debug pi zero 2 boot 0:37:40 DWC2 is null - probably the issue 0:38:40 Did you try USB boot on any of your board? You can boot a PiZero just plugged on the USB with proper software on the other side. ( no ) 0:48:07 using svd to read VCMAILBOX STATUS1 0:58:21 you are using just one core of the RPi. Is there a plan to use more than just one core in the future? 0:59:45 boot to repl - not recovering from the flush 1:10:23 try a non-debug build 1:04:23 dump-stack - to find code lines for stack based addresses 1:05:29 USB handler looks like it is corrupting the stack 1:13:16 not-implemented error opcode 1:15:38 booted in widescreen - why? 1:16:20 still getting NotImplementedError: Opcode 1:17:00 So what fixed the USB? ( we don’t know it’s fixed yet - usb uart ) 1:18:30 this time it successfully restarted 1:19:01 plug in the USB 1:20:15 try restarting again 1:20:53 when printing temperature - we get the notimplemented opcode error 1:27:00 try again - USB pops up - 1:27:30 Is what’s on git supposed to be working right now? (yes) 1:28:50 port_get_raw_ticks #asm(“dsb sy”) memory barrier 1:34:00 discord #live_broadcast_chat for kernel8.img and firmware.disk.img.zip 1:35:50 “add --depth 1 or you'll be downloading 20 GB of submodule” 1:37:30 something about unplugging the USB 1:38:45 perhaps USB interrupt isn’t clearing something 1:46:04 Are the docs for this Broadcom stuff publicly available? And if so where would one find them? 1:48:01 this build does not work: 1:48:50 other documentation resources 1:49:15 can’t connect to jlink jtag debug till I disconnect USB 1:45:53 are the swd debug pins on the header? or configurable to the header? or is it time to heat up some testpoint pads? 1:51:48 turn on rando in ports in mpconfigport.mk CIRCUITPY_RANDOM = 1 1:53:44 import random works random.randint(0,9) 1:54:40 check “Ci” / it’s working 1:56:20 tinyusb doesn’t work :-( 1:57:45 these builds don’t work on zero 2 yet 1:58:10 report bug in tinyusb / Broadcom USB address / Pi Zero 2W github.com/hathach/tinyusb/issues 2:02:10 checking git status before commit 2:04:00 explaining the origin_build push 2:07:00 CP now has Russian support 2:07:45 pushes complete / ci will run again, zero 2W builds won’t work 2:08:12 wrap up 2:10:40 cat cam 2:11:10 end of feed Visit the Adafruit shop online - http://www.adafruit.com ----------------------------------------- LIVE CHAT IS HERE! http://adafru.it/discord Adafruit on Instagram: https://www.instagram.com/adafruit Subscribe to Adafruit on YouTube: http://adafru.it/subscribe New tutorials on the Adafruit Learning System: http://learn.adafruit.com/ -----------------------------------------