Lup Yuen Lee 李立源 @lupyuen@qoto.org

Overview on MCUBoot @ Zephyr RTOS

https://jimmywongiot.com/2021/05/26/overview-on-mcuboot-zephyr-rtos/

GTA with Machine Learning: "A Video Game That Looks Like Reality!"

https://youtu.be/22Sojtv4gbg

"Teach all upper-secondary students finance, economics amid rising interest in #cryptocurrencies"
https://www.todayonline.com/voices/teach-all-upper-secondary-students-finance-economics-amid-rising-interest-cryptocurrencies

#BL602 runs #TensorFlow Lite Model that infers "y = sin(x)" ... Output looks reasonably accurate!

https://github.com/lupyuen/bl_iot_sdk/tree/tflite/customer_app/sdk_app_tflite

#TensorFlow Lite runs OK on #BL602 yay! 🎉 This pre-trained TensorFlow Model is supposed to infer "y = sin(x)" ... Let's verify the output! 🥧

https://github.com/lupyuen/bl_iot_sdk/tree/tflite/customer_app/sdk_app_tflite

Best part of this New #BL604 Gadget

😍

Happy Belated Pink Dot!

https://youtu.be/n3Ge4-Qstv4

#TensorFlow Lite builds OK on #BL602 yay! Let's flash and run the firmware! 🤩

https://github.com/lupyuen/bl_iot_sdk/tree/tflite/customer_app/sdk_app_tflite

We set the #BL602 Global Destructor "__dso_handle" to null ... Since we're not destroying the Static TensorFlow Variables

https://github.com/lupyuen/bl_iot_sdk/blob/tflite/customer_app/sdk_app_tflite/sdk_app_tflite/demo.c#L20-L22

We disable Thread-Safe Initialisation by setting "-fno-threadsafe-statics" ... This fixes the Missing Functions "__cxa_guard_acquire" and "__cxa_guard_release" in #BL602 TensorFlow

https://github.com/lupyuen/bl_iot_sdk/blob/tflite/customer_app/sdk_app_tflite/sdk_app_tflite/bouffalo.mk#L37-L41

Aha "CPPFLAGS" should be defined in #BL602 "bouffalo.mk" ... Not "Makefile" 🙄

https://github.com/lupyuen/bl_iot_sdk/blob/tflite/customer_app/sdk_app_tflite/sdk_app_tflite/bouffalo.mk#L28-L41

Monumental Supply-Chain Attack on Airlines (SITA) Traced to State Actor

https://threatpost.com/supply-chain-attack-airlines-state-actor/166842/

Just realised that "CPPFLAGS" works for building #BL602 C++ Libraries, but not for BL602 C++ Apps ... Dang

https://github.com/lupyuen/bl_iot_sdk/blob/tflite/customer_app/sdk_app_tflite/Makefile#L12-L20

This #BL604 LCD looks complicated 🤔

#OpenSource and Mental Health

https://www.redox-os.org/news/open-source-mental-health/

Final few Missing Functions for TensorFlow Lite on #BL602 ... Let's find out what they are

https://github.com/lupyuen/bl_iot_sdk/tree/tflite/customer_app/sdk_app_tflite

Setting this flag will tell TensorFlow Lite to use Static Memory (instead of Heap Memory) on #BL602 ... Neat!

https://github.com/lupyuen/tflite-bl602/blob/main/bouffalo.mk#L46-L49

Our #BL602 Build of TensorFlow Lite calls "new" and "delete" to Allocate and Deallocate C++ Objects in Heap Memory ... But it's supposed to use Static Memory, not Heap Memory ... Let's find out why

https://github.com/lupyuen/bl_iot_sdk/tree/tflite/customer_app/sdk_app_tflite

Source Folders for TensorFlow Lite are defined in the #BL602 Makefiles "bouffalo.mk" and "component.mk"

https://github.com/lupyuen/tflite-bl602/blob/main/bouffalo.mk