Lup Yuen Lee 李立源 @lupyuen@qoto.org

#OpenOCD Bit Bang strikes again 😉

https://github.com/jeanthom/openocd-dirtyjtag/issues/3

"Most productive on Sunday" ... This weirdo has no life! 😂

https://open.engineer/lupyuen

"Serious" vulnerability found in Libgcrypt, #GnuPG's crypto library

https://www.helpnetsecurity.com/2021/01/29/libgcrypt-vulnerability/

Another #BL602 trap! "vfs_spi_init_fullname" doesn't return the SPI Device ... It passes the SPI Device to AliOS! Let's create our own function to init the SPI Port without AliOS 🤔

https://github.com/lupyuen/bl_iot_sdk/blob/spi/components/hal_drv/bl602_hal/hal_spi.c#L504-L571

Programming language for #Excel now Turing Complete

https://visualstudiomagazine.com/articles/2021/01/27/excel-lambda.aspx?m=1

Nope #BL602 it's a trap! Should call "vfs_spi_init_fullname" to init the SPI port

https://github.com/lupyuen/bl_iot_sdk/blob/spi/components/hal_drv/bl602_hal/hal_spi.c#L504-L571

Init the #BL602 SPI Port ... Looks easy

https://github.com/lupyuen/bl_iot_sdk/blob/spi/customer_app/sdk_app_spi/sdk_app_spi/demo.c#L41-L58

Time for #OpenSource Educational Content? 🤔

https://www.theguardian.com/education/2021/jan/29/price-gouging-from-covid-student-ebooks-costing-up-to-500-more-than-in-print

...But #BL602 SPI HAL doesn't implement all AliOS SPI Functions 🤔

https://github.com/lupyuen/bl_iot_sdk/blob/spi/components/hal_drv/bl602_hal/hal_spi.c#L368

#BL602 SPI Functions are the same as AliOS ... Time to practice my Chinese reading skills

https://help.aliyun.com/document_detail/161063.html?spm=a2c4g.11186623.6.576.391045c4bGoNKS

RF Explorer in #WandaVision? I got one too! 🙂

https://www.seeedstudio.com/RF-Explorer-Signal-Generator-COMBO-p-2944.html

But if AliOS is really a complete Embedded Operating System ... Why does #BL602 IoT SDK still need FreeRTOS? 🤔

https://github.com/alibaba/AliOS-Things

"AOS" means "AliOS" ... So #BL602 IoT SDK is actually built on AliOS! But no worries ... I can port the BL602 HAL to #Mynewt ... Without AliOS 😉

https://github.com/lupyuen/bl_iot_sdk/blob/master/customer_app/sdk_app_i2c/sdk_app_i2c/main.c#L159-L196

20 years later ... I'm still Handling Interrupts 😉

https://www.yumpu.com/en/document/read/19235930/pc-choices-object-oriented-operating-system

"PC-Choices Object-oriented Operating System" ... Found my Master's Thesis from 1992! 🥲

https://www.yumpu.com/en/document/view/19235930/pc-choices-object-oriented-operating-system

#BL602 SPI DMA is used by AliOS VFS file system ... Which is bundled with the BL602 IoT SDK

https://pine64.github.io/bl602-docs/Components/Middleware/vfs/vfs.html