Lup Yuen Lee 李立源 @lupyuen@qoto.org

#BL602 SPI talks to #ST7789 Display at Max Speed ... 4 MHz 🚀

https://lupyuen.github.io/articles/display#initialise-spi-port

"Why not find a boyfriend or girlfriend? Why not get married? Do you plan to have a child?" 😱

https://amp.scmp.com/news/china/politics/article/3121239/chinas-stay-home-lunar-new-year-welcome-break-tradition-many

How we connect #PineCone #BL602 @PINE64 to #ST7789 SPI Display

https://lupyuen.github.io/articles/display#connect-bl602-to-st7789-spi-display

What's causing the Chip Shortage affecting PS5, cars and more?

https://www.cnbc.com/2021/02/10/whats-causing-the-chip-shortage-affecting-ps5-cars-and-more.html

1️⃣ Start with 6502 2️⃣ Take away the odd digits 3️⃣ We get 602 ... #BL602 🤔

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

... Because any Sufficiently Advanced Technology (like #RISCV, #BL602 and #LoRa) is indistinguishable from Magic 😉

https://en.m.wikipedia.org/wiki/Clarke%27s_three_laws

Next Magical Trick: #BL602 with #LoRa SX1276 @Tindie ! 👏

https://www.tindie.com/products/m2m/lora-module-for-breadboard-with-antenna/

Everything about #BL602, #ST7789 Display and #LVGL Library shall be explained here ... Stay tuned!

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

Here's how we code #BL602 graphical apps with #LVGL ... Hoping this will be the Standard Way to code BL602 apps on ALL operating systems: FreeRTOS, Mynewt, RIOT, Zephyr, Rust, ... Just like #PineTime!

https://github.com/lupyuen/bl_iot_sdk/blob/st7789/customer_app/sdk_app_st7789/sdk_app_st7789/lvgl.c#L30-L79

What if @PINE64 sold a "Deconstructed #PineTime" ... Breadboard-Friendly 1️⃣ #BL602 (#RISCV, WiFi, BLE) 2️⃣ Display 3️⃣ Touch Panel 4️⃣ Accelerometer 5️⃣ Heart Rate SpO2 6️⃣ Vibrator 7️⃣ Flash 8️⃣ Battery Mgmt 9️⃣ #LoRa 🤔

Is #RustLang Game yet?

https://arewegameyet.rs/

Black Hat #RustLang - Deep dive into offensive security

https://academy.kerkour.com/black-hat-rust

#BL602 SPI DMA to #ST7789 at 4 MHz ... Works OK now! 🎉 Green LED shows the Screen Refresh duration 🚀

https://youtu.be/PkP-CeYLXUA

Researcher hacks over 35 tech firms in npm and PyPI attack

https://www.bleepingcomputer.com/news/security/researcher-hacks-over-35-tech-firms-in-novel-supply-chain-attack/

#BL602 SPI talking to #ST7789 at 4 MHz ... Works perfectly if the SPI Transmit Buffer is located in RAM ... Transmitting from Flash ROM might be too slow for 4 MHz DMA

https://github.com/lupyuen/bl_iot_sdk/blob/st7789/customer_app/sdk_app_st7789/sdk_app_st7789/display.c#L79-L194

Here's how we set SPI Timeout in #BL602 SPI HAL ... Default is to Wait Forever, which can cause problems with 4 MHz SPI

https://github.com/lupyuen/bl_iot_sdk/blob/st7789/components/hal_drv/bl602_hal/hal_spi.c#L346-L350

#BL602 SPI 4 MHz works with #ST7789 ... But only when we set the SPI Timeout 🤔

https://github.com/lupyuen/bl_iot_sdk/blob/st7789/customer_app/sdk_app_st7789/sdk_app_st7789/demo.c#L99-L107