Lup Yuen Lee 李立源 @lupyuen@qoto.org

Why my #BL602 I2C Program crashed ... And the 2 levels of BL602 I2C HAL

https://github.com/lupyuen/bl_iot_sdk/releases/tag/v1.0.1

$1 #PinePhone pogo pin breakout board lets you connect add-ons without removing the back cover

https://linuxsmartphones.com/1-pinephone-pogo-pin-breakout-board-lets-you-connect-add-ons-without-removing-the-back-cover/

When the #BL602 I2C HAL looks dubious ... Refer to the BL602 Reference Manual!

https://github.com/bouffalolab/bl_docs/tree/main/BL602_RM/en

How we hack #PineCone #BL602 #RISCV on Saturday Night @PINE64

https://github.com/lupyuen/bl_iot_sdk/blob/i2c/customer_app/sdk_app_i2c/sdk_app_i2c/demo.c#L216-L308

#BL602 I2C program doesn't crash now ... But it doesn't read any data from the BME280 Sensor 🤔

https://github.com/lupyuen/bl_iot_sdk/blob/i2c/customer_app/sdk_app_i2c/sdk_app_i2c/demo.c#L216-L308

Found the bug in my #BL602 I2C program ... There are two levels of BL602 I2C API: 1️⃣ High Level (which calls FreeRTOS) 2️⃣ Low Level (which doesn't call FreeRTOS) ... I'm using the Low Level API, so I shouldn't call "hal_i2c_init" in the High Level API

https://github.com/lupyuen/bl_iot_sdk/blob/i2c/customer_app/sdk_app_i2c/sdk_app_i2c/main.c#L187-L190

#ESP32 #EPaper Inkplate gives Kindle Displays a second chance

https://hackaday.com/2021/01/22/esp32-inkplate-gives-kindle-displays-a-second-chance/

Here's how we dump the #RISCV Disassembly from the #BL602 ELF Executable

https://github.com/lupyuen/bl_iot_sdk/releases/tag/v1.0.1

Let's hunt for MEPC (Machine Exception Program Counter) 0x2300 8fe2 in the #RISCV Disassembly ... Yep my buggy code crashed in the #BL602 I2C Interrupt Handler 🤔

https://github.com/lupyuen/bl_iot_sdk/releases/download/v1.0.1/sdk_app_i2c.S

My First #RISCV Exception on #PineCone #BL602 🤔

https://github.com/lupyuen/bl_iot_sdk/blob/i2c/customer_app/sdk_app_i2c/sdk_app_i2c/demo.c#L234-L308

600 Views of my Buggy C Code for #BL602 I2C ... Time to Hyperventilate 😲

https://github.com/lupyuen/bl_iot_sdk/blob/i2c/customer_app/sdk_app_i2c/sdk_app_i2c/demo.c#L234-L308

Check out the awesome web demo: https://zalo.github.io/CascadeStudio/

3WheelsBot: a bot with B of #Beaglebone

https://gabrieldai.gitlab.io/posts/miloco-3wheelsbot/

#TinyML Benchmark: Arduino #Portenta H7 vs #Teensy 4.0 vs #STM32 Nucleo H743ZI2

https://eloquentarduino.github.io/2021/01/tinyml-benchmark-arduino-portenta-h7-vs-teensy-4-0-vs-stm32-nucleo-h743zi2/

Full Live-Scripted #CAD Kernel in the Browser

https://github.com/zalo/CascadeStudio

Why #Webcams aren’t good enough

https://reincubate.com/support/how-to/why-are-webcams-bad/

Affordable #STM32 H7 Dev Boards

https://www.cnx-software.com/2021/01/23/devebox-stm32h7-development-boards-are-made-for-factory-automation/