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Deep Dive w/Scott: Pin Muxing

Deep Dive w/Scott: Pin Muxing

Adafruit Industries vor 1 Monat

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1:05:36

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Adafruit Industries

198 Episoden

DIY electronics projects & much more

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Join Scott as he discusses dynamic pin muxing in the Zephyr port.
For example, pin muxing allows user code to use any I2C on any
capable pins. He'll also answer any questions folks have. Visit the
Adafruit shop online - http://www.adafruit.com Thanks to dcd for
timecodes 0:00 Getting started 0:37 join the discord
#live-broadcast-chat channel on http://adafru.it/discord 1:00 Scott
welcomes you to the deep dive, working for open source hardware
company http://www.adafruit.com/ 1:38 Circuit Python (CP) runs on
microcontrollers 2:52 "Snake Acceleration", (using micropyton v1.28
native modules to speed things up) in CP v10.4 5:10 The new
bootloader hopefully will go into CP v10.4 also 6:00 Github
adafruit/circuitpython insights 6:30 Picogame and CI speedup 7:45
CP is a fork of micropython 8:54 Zephyr Pin Muxing / github zephyr
"Introduce Dynamic pinctrl" #18255 9:19 Zephyr device tree file
zephyrproject-rtos / zephyr / boards / adafruit / feather_nrf52840
dtsi example 12:20 CP allows specifying pins at run time (
https://learn.adafruit.com/circuitpython-essentials/circuitpython-i2c
) 13:30 Goal is to get zephyr port to allow dynamic pin control
14:20 nRF54LM20 datasheet 16:34 iMX RT1011
adafruit.com/product/4950 pin names, mapped to 17:07 main guide (
learn.adafruit.com/adafruit-metro-m7-with-airlift ) 17:27 Follow
D10 to cpu on fab print https://learn.adafruit.com/assets/119301
17:50 schematic trace D10 net name to GPIO_06 on iMX RT1010
https://learn.adafruit.com/assets/119300 19:20 pins.c in board
folder 20:39 i.MX RT1010 datasheet block diagram / IOMUX / pin
muxing background 26:28 down in the weeds with the i.MX RT1010
processor reference manual 28:55 Chapter 10-12 IOMUX Controller
(Port / Pin / Pad ) 30:00 Intel 8080 die shot - example ioring /
pad 30:50 RT1011 IORING pad and IOMUX 32:39 IOMUXC functional
description / peripheral to pad muxing 35:19 GPIOMUX diagram and
scheme 36:40 GPIO pad structure 38:30 settings to connect function
to chips pin, and board pin 39:30 github adafruit circuitpython /
ports / mimxrt10xx / common-hal / busio / I2C.c 40:50
common_hal_busio_i2c_construct() parameters 41:00 #if
CIRCUITPY_REQUIRE_I2C_PULLUPS and "No pull up found" exception
42:11 searching the mcu_i2c sda and scl lists 43:30 refer to
datasheet 43:23 and lists in periph.c 45:17 goals for zephyr 46:36
compare to nRF54LM20A data sheet 53:17 peripher and subsystem
assignment 8.9.4 ( Nordic PSEL ) 54:30 dynamic_bus.h
dynamic_bus_i2c_allocate(), spi, and uart API 57:54
dynamic_bus_gpio.c implementation 58:45 zephyr dts structures 59:41
stm32c0 arm m0 small package wrinkle 1:02:43 alternate function
mapping 1:03:47 wrap up pin muxing background 1:04:00 discord ( see
above ) live all week, also, deep divers role 1:05:21 see you next
week ----------------------------------------- LIVE CHAT IS HERE!
http://adafru.it/discord Subscribe to Adafruit on YouTube:
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System: http://learn.adafruit.com/
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