Lup Yuen Lee 李立源 @lupyuen@qoto.org

Quick check of #BL602 Boot2 Disassembly ... To be sure that it matches the Boot2 Bootloader that we have been flashing to BL602. Great exercise for learning #RISCV Assembly! 👍

https://github.com/lupyuen/bl_iot_sdk/releases/download/v8.0.2/bl602_boot2.S

When #BL602 boots, it runs the Boot2 Bootloader Firmware at 0x2300 0000 ... Which loads the Application Firmware into (yikes!) 0x2300 0000 ... Let's investigate how the Bootloader makes this self-overlay possible

https://github.com/lupyuen/bl_iot_sdk/blob/master/tools/flash_tool/bl602/builtin_imgs/blsp_boot2.map#L6884

#BL602 Linker Map shows Boot2 Code is always loaded at 0x2300 0300 ... Let's find out what's inside

https://github.com/lupyuen/bl_iot_sdk/releases/download/v8.0.1/sdk_app_blinky.map

My hunch: #BL602 Boot2 and ESP32 Secure Boot V2 have similar bootloader features 🤔

https://docs.espressif.com/projects/esp-idf/en/latest/esp32/security/secure-boot-v2.html

#BL602 "Boot2" ... The Boot Code that starts every BL602 Firmware ... Shall I unravel and document the code? 🤔

https://github.com/bouffalolab/bl_iot_sdk/tree/master/customer_app/bl602_boot2/bl602_boot2

"The #RISCV #BL602 Book" ... Everything about BL602 spanning 18 articles ... And still growing! 👍

https://lupyuen.github.io/articles/book

uLisp for #PineTime Smartwatch? 🤔

https://www.reddit.com/r/PINE64official/comments/nm70kz/simulate_riscv_bl602_with_webassembly_ulisp_and/?utm_medium=android_app&utm_source=share

Ah Heng Chicken Curry Bee Hoon Mee (Michelin Recommended)

https://danielfooddiary.com/2019/03/07/ahheng/

Here's why our #BL602 Simulator runs a stream of Simulation Events

https://lupyuen.github.io/articles/wasm?20#why-simulate-a-stream-of-events

Will our #BL602 Simulator run Actual BL602 Firmware in #WebAssembly? It might be possible!

https://lupyuen.github.io/articles/wasm?19#can-we-simulate-any-bl602-firmware

Here's how we added #BL602 Simulator to #Blockly ... To simulate our drag-n-drop programs

https://lupyuen.github.io/articles/wasm?18#simulate-blockly-programs

Drag-n-drop #Blockly (Scratch) programs ... And run them with #BL602 Simulator! Try it here

https://lupyuen.github.io/articles/wasm?16#add-simulator-to-blockly

#uLisp will generate an Infinite List of Simulation Events when it's stuck in a loop ... Here's how we stop it for our #BL602 Simulator

https://lupyuen.github.io/articles/wasm?15#simulate-loops

Simulating Time Delays with #BL602 Simulator ... I think we can travel back in time 🤔

https://lupyuen.github.io/articles/wasm?12#simulate-delays

Here's how we flip the Simulated LED on #BL602 Simulator

https://lupyuen.github.io/articles/wasm?11#flip-the-simulated-led

How uLisp #WebAssembly passes Simulation Events to the #BL602 Simulator

https://lupyuen.github.io/articles/wasm?10#get-the-simulation-events

How #uLisp adds a #BL602 Simulation Event

https://lupyuen.github.io/articles/wasm?8#add-a-simulation-event

Singapore Fried Kway Teow 新加坡炒粿条 🤤

Support our local food & beverage 👍

#uLisp sends a stream of Simulation Events to our #BL602 Simulator ... Here's how it works

https://lupyuen.github.io/articles/wasm?5#simulate-bl602-hardware