Lup Yuen Lee 李立源 @lupyuen@qoto.org

#BL602 and #ST7789 run on Windows ... The primitive, geometric kind 😉

https://lupyuen.github.io/articles/display#display-image-on-st7789

How #PineCone #BL602 @PINE64 renders a photo on #ST7789 over #SPI

https://lupyuen.github.io/articles/display#display-image-on-st7789

Thai Captcha ... With American Tractors? 🤔

Thailand Post looks so adorable!

#RISCV #PineCone #BL602 @PINE64 with #ST7789 Display ... Featuring Jewel Changi, Singapore

https://en.m.wikipedia.org/wiki/Jewel_Changi_Airport

8 #ST7789 Init Commands that every dev needs to know ... And how we use them on #BL602

https://lupyuen.github.io/articles/display#initialise-st7789-display

#ST7789 Display will let us flip it, reverse it ... Here's how we do the #SPI thang on #BL602

https://lupyuen.github.io/articles/display#set-display-orientation

#ST7789 accepts SPI Commands in an unusual way ... Here's how we send them with #BL602

https://lupyuen.github.io/articles/display#transmit-st7789-commands

#BL602 SPI code from previous article .... Works OK for transmitting data to #ST7789

https://lupyuen.github.io/articles/display#transfer-spi-data

Sorry I goofed ... #BL602 and #ST7789 work fine at 5 MHz. Here's the update...

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

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

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

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

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

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

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

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 🤔

#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