《深入研究》
因為 Zero 系列是單面組件放置，過去 Zero/Zero W 使用 Broadcom BCM2835 SoC (ARM1176JZF-S 單核心)，其 SoC 和 SDRAM 使用 package-on-package(PoP)封裝技術，可以將 SDRAM 封裝直接位於 SoC 的頂部，看起來像是這樣。
圖片來源：New product: Raspberry Pi Zero 2 W on sale now at $15
而 Zero 2 W 使用四個 Cortex-A53 核心，因為四核心的處理電路面積會超過原本的大小，無法直接使用原本的 PoP 技術，因此在 Pi 2 以後的樹莓派都是將 SoC 和 SDRAM 分離。
但隨著半導體技術的演進，在 2011 年的 BCM2763 曾使用 system-in-package (SiP)封裝技術(將 128MB SDRAM 和 SoC 晶片直接封裝在一起)又被應用在這次的 Zero 2 W。這次的封裝技術 RP3A0 是新一代的 SiP，可結合 BCM2710A1 晶片和 4Gbit Micron LPDDR2，看起來像是這樣。
圖片來源：New product: Raspberry Pi Zero 2 W on sale now at $15
The 33th the Raspberry Pi meetup, the topic is “Raspberry Pi 4 + Ubuntu and Boot Analysis”.
Speaker 1: Taiten(Canonical)
Topic：Snap your application for embedded system
1) Snap and Ubuntu Store for IoT
2) Snap vs Docker
3) Snap your app demo
Speaker 2: StarNight
Topic: A journey to boot Linux on Raspberry Pi
Outline:
I will share several possible boot process of Linux distribution on Raspberry Pi, and the boot process of a Linux distribution with OSTree technology. Take Endless OS booting on Raspberry Pi as an example.
Lightning Talk 1: Alvin(Creative5)
Topic: Running Compal 5G module on Raspberry Pi 4
第三十三次 Raspberry Pi 社群聚會，希望能透過社群活動的分享和交流，找到更多 Raspberry Pi 的可能。本次主題是「Raspberry Pi 4 + Ubuntu 和系統開機分析 」。
分享者1：Taiten(Canonical)
題目：Snap your application for embedded system
1) Snap and Ubuntu Store for IoT
2) Snap vs Docker
3) Snap your app demo
分享者2：StarNight
題目：A journey to boot Linux on Raspberry Pi
大綱：本次將分享幾個 Linux distribution 在 Raspberry Pi 的可能開機過程，以及自己實做一個搭配 OSTree 技術的 Linux distribution 的開機流程。以 Endless OS 在 Raspberry Pi 上開機為例。
透過觀察幾個 Linux distribution 的開機過程，發現 U-Boot 可以做到將開機過程分為「高度硬體相關」與「一般系統皆可通用」的兩大步驟。特別是「一般系統皆可通用」的開機步驟，滿足搭配 OSTree 技術的系統(包含，但不限於)有方便、一致的開機模式需求。更進一步，有機會解決各硬體專屬 Device Tree 的佈署問題。
這次將分享如何實做讓系統在 Raspberry Pi 上開機的過程！
2020-05-27:
* Added Bookshelf application
* Added Raspberry Pi Diagnostics application
* Added magnifier plugin to taskbar - needs magnifier application installed from Recommended Software to enable
* Added Magnifier application to Recommended Software
* Added marketing questionnaire as initial Chromium tab
* Version 0.25 of Scratch 2 included - uses external application to access IMU on SenseHAT
* Version 1.0.5 of Scratch 3 included - uses external application to access IMU on SenseHAT
* Version 32.0.0.371 of Flash player included
* Version 1.0.6 of Node-RED included
* Version 6.7.1 of VNC Server included
* Version 6.20.113 of VNC Client included
* Internal audio outputs enabled as separate ALSA devices
* MagPi preinstall removed and replaced with Beginner’s Guide
* MagPi weblink removed from main menu
* Chromium made default application for PDF files
* Common icon loading code for lxpanel plugins used
* Italian translations added
* Initial move of mouse pointer to menu button disabled
* Padding at left of menu button removed
* Focus behaviour changed so that focus moves to desktop if no windows are opened - improves reliability of Orca screen reader
* Bug fix - focus bug in volume plugin
* Bug fix - keyboard repeat interval bug in Mouse & Keyboard Settings
* Bug fix - battery detection bug in battery plugin
* Bug fix - spurious active areas on taskbar when plugins are hidden
* Bug fix - occasional crash in file manager on file selection
* Disk ID is now regenerated on first boot
* Updated udev rules
- Remove unused argon rule
- Add vcsm-cma to video group
- Add pwm to gpio group
* i2cprobe: More flexible I2C/SPI alias mapping
* Raspberry Pi firmware 21e1fe3477ffb708a5736ed61a924fd650031136
* Linux kernel 4.19.118
Pi 3B+ 這次新增了 MaxLinear MxL7704 電源管理 IC，可有更好的溫度管理策略。例如在 70°C 以下可以使用 1.4GHz 全速運轉；但超過了 70°C 就會降到 1.2GHz 的速度。可用 Sysbench 看溫度/頻率的曲線圖。
圖片來源：RASPBERRY PI 3 MODEL B+ ON SALE NOW AT $35
2018-03-13:
* Raspberry Pi 3 B+ support
* WiFi is disabled until wireless regulatory domain is set (Pi 3 B+ only)
- The domain can be done through 'Raspberry Pi Configuration' (rc_gui),
'raspi-config' or by setting 'country=' to an appropriate ISO 3166
alpha2 country code in /etc/wpa_supplicant/wpa_supplicant.conf.
* Default wireless regulatory domain is now unset
* Added support to desktop for different screen sizes and resolutions,
including multiple preset options in Appearance Settings and pixel doubling
option in Raspberry Pi Configuration
* Version 2.1.16 of Thonny included
* Version 29.0.0.113 of Adobe PepperFlash player included
* Version 1.2.post1 of Pygame Zero included
* Bluetooth plugin now supports connection to Bluetooth LE HID devices
* Network plugin now indicates 5G-compatible APs
* Latest changes to Bluez ALSA service merged
- service now started on CLI boot as well as GUI boot
* Latest changes to dhcpcd networking plugin merged
* Improved support for running on pi-top devices
* Small design changes to PiX theme and icons
* Bug fix - hide spurious window resize handles
* Bug fix - Scratch 2 remote GPIO state block now works correctly
* Updated WiFi Firmware
- brcmfmac43455-sdio 7.45.154
- brcmfmac43430-sdio 7.45.98.38
* New packages:
- policykit-1
- obconf
- python-buttonshim python3-buttonshim
- python-unicornhathd python3-unicornhathd
- python-pantilthat python3-pantilthat
* Linux kernel 4.9.80+
* Raspberry Pi firmware 3347884c7df574bbabeff6dca63caf686e629699
