Lup Yuen Lee 李立源 @lupyuen@qoto.org

@2ck Not yet, but I hope to use Blender soon 👍

#BL602 has an SPI Quirk ... We must use SPI Mode 1 instead of Mode 0 ... Let's fix this in #NuttX

https://lupyuen.github.io/articles/spi#spi-phase-looks-sus

Blender 3.0 released

https://www.blender.org/download/releases/3-0/

"Someone is hacking Receipt Printers with 'antiwork' messages"

https://www.engadget.com/someone-is-hacking-receipt-printers-with-pro-worker-messages-115040881.html

"Is #Pine64 Pine Store Limited traded publically?"

https://www.reddit.com/r/PINE64official/comments/r817go/is_pine_store_limited_traded_publically/?utm_medium=android_app&utm_source=share

"Got my Allwinner D1 #RISCV development board, with 2GB RAM"

https://www.reddit.com/r/RISCV/comments/r7nfzm/finally_got_my_allwinner_d1_development_board/?utm_medium=android_app&utm_source=share

Our #NuttX App reads an SX1262 Register ... But it returns garbage! There's a workaround for this #BL602 SPI Quirk

https://github.com/lupyuen/incubator-nuttx-apps/blob/spi_test/examples/spi_test2/spi_test2_main.c#L90-L119

Now our #NuttX App is ready to read an SX1262 Register over SPI!

https://github.com/lupyuen/incubator-nuttx-apps/blob/spi_test/examples/spi_test2/spi_test2_main.c#L90-L119

Here's our #NuttX App controlling SPI Chip Select via GPIO

https://github.com/lupyuen/incubator-nuttx-apps/blob/spi_test/examples/spi_test2/spi_test2_main.c#L42-L74

"Grab tumbles 33% on Nasdaq debut day"

https://www.businesstimes.com.sg/garage/grab-tumbles-33-on-nasdaq-debut-day-fails-to-sustain-initial-surge

#BL602 SPI Chip Select has a problem ... It goes High after EVERY byte ... Which is no-no for SX1262 ... Solution: We control Chip Select via GPIO

https://github.com/lupyuen/incubator-nuttx-apps/blob/spi_test/examples/spi_test2/spi_test2_main.c#L42-L74

Our #NuttX App transmits an SPI Command to SX1262 ... And reads the SPI Response from SX1262

https://github.com/lupyuen/incubator-nuttx-apps/blob/spi_test/examples/spi_test2/spi_test2_main.c#L54-L84

We implement the Read Operation for our #NuttX SPI Driver ... So that we can fetch the SPI Response from SX1262

https://github.com/lupyuen/incubator-nuttx/blob/spi_test/drivers/rf/spi_test_driver.c#L210-L233

"SiFive Performance P650 #RISCV core to outperform Arm Cortex-A77 performance per mm2"

https://www.cnx-software.com/2021/12/03/sifive-performance-p650-risc-v-core-to-outperform-arm-cortex-a77-performance-per-mm2/

"Milk Tea Vending Machine" (Robot Arm)

https://youtu.be/pz-4uHcViUg

SiFive Announces Latest #RISCV CPU: P650

https://www.tomshardware.com/news/sifive-announces-p650-riscv

Let's test #NuttX SPI with #BL602 and Semtech SX1262 LoRa Transceiver

https://www.semtech.com/products/wireless-rf/lora-core/sx1262

Why It’s So Difficult — And Costly — To Secure Chips

https://semiengineering.com/why-its-so-difficult-and-costly-to-secure-chips/

"New Vector, Scalar Cryptography and Hypervisor specifications will help accelerate the adoption of #RISCV across a variety of market segments" (IoT / AI / ML)

https://riscv.org/announcements/2021/12/riscv-ratifies-15-new-specifications/