Lup Yuen Lee 李立源

with ST7789 Display and Graphics ... Let's make it work on Apache RTOS!

github.com/lupyuen/st7789-nutt

1
Lup Yuen Lee 李立源

We'll use the ST7789 Display Driver that comes with Apache RTOS ... Batteries all included! 🔋

github.com/lupyuen/st7789-nutt

1
Lup Yuen Lee 李立源

wraps the ST7789 Display Driver as an LCD Device "/dev/lcd0" ... Which will be used by Graphics Library

github.com/lupyuen/st7789-nutt

1
Lup Yuen Lee 李立源

Here's how we load the LCD Driver at startup

github.com/lupyuen/st7789-nutt

1
Lup Yuen Lee 李立源

Then we load the ST7789 Display Driver at Startup

github.com/lupyuen/st7789-nutt

1
Lup Yuen Lee 李立源

Here's how we connect ST7789 Display to PineCone @PINE64

github.com/lupyuen/st7789-nutt

1+
Lup Yuen Lee 李立源

Remember to patch the bug for SPI Poll Send in SPI Driver ... Before testing ST7789 Display

qoto.org/@lupyuen/108014321608

1
Lup Yuen Lee 李立源

SPI Driver will control the ST7789 Data / Command Pin ... Here's the patch

qoto.org/@lupyuen/108020639863

1
Lup Yuen Lee 李立源

only talks SPI Mode 3 to ST7789 Display ... Wonder why 🤔

github.com/lupyuen/st7789-nutt

1
Lup Yuen Lee 李立源

Let's render a Pink Screen when boots ... To verify that the ST7789 Display Driver works

github.com/lupyuen/st7789-nutt

1
Lup Yuen Lee 李立源

Why is AAAA pink? Because ST7789 Display encodes colours as RGB565 ... 5 bits of Red, 6 bits of Green, 5 bits of Blue

github.com/lupyuen/st7789-nutt

1+
Lup Yuen Lee 李立源
Follow

Apache RTOS boots with a Pink Screen on ST7789 Display! 🎉

github.com/lupyuen/st7789-nutt

· · Tusky · 1 · 0 · 3
Lup Yuen Lee 李立源

ST7789 Display Driver feels laggy on ... Hope to fix this with SPI DMA

github.com/lupyuen/st7789-nutt

1
Lup Yuen Lee 李立源

Let's test the Library and Demo App bundled with Apache RTOS

github.com/lupyuen/st7789-nutt

1
Lup Yuen Lee 李立源

's Demo App inits the ST7789 Display, renders some widgets and handles LVGL Events

github.com/lupyuen/st7789-nutt

1
Lup Yuen Lee 李立源

Demo runs OK with ST7789 Display on Apache RTOS! 🎉

github.com/lupyuen/st7789-nutt

1
Lup Yuen Lee 李立源

RTOS is bundled with 7.3.0 ... But latest version of LVGL is 8.2.0 ... And LVGL 8 is NOT backward compatible with LVGL 7 🤔

github.com/lupyuen/st7789-nutt

1
Lup Yuen Lee 李立源

Apache RTOS renders graphics on ST7789 Display with Library ... All shall be explained in this article

lupyuen.github.io/articles/st7

1
Lup Yuen Lee 李立源

Here's how we connect ST7789 Display to and -C3

lupyuen.github.io/articles/st7

1
Lup Yuen Lee 李立源

RTOS controls ST7789's Data / Command Pin through the SPI Driver

lupyuen.github.io/articles/st7

1
Lup Yuen Lee 李立源

How we fixed SPI Send on

lupyuen.github.io/articles/st7

1
Lup Yuen Lee 李立源

talks to ST7789 only in SPI Mode 3 ... Wonder why 🤔

lupyuen.github.io/articles/st7

1
Lup Yuen Lee 李立源

Before loading the ST7789 Driver, we load the LCD Driver "/dev/lcd0"

lupyuen.github.io/articles/st7

1
Lup Yuen Lee 李立源

Here's how we load the ST7789 Display Driver on RTOS

lupyuen.github.io/articles/st7

1
Lup Yuen Lee 李立源

Let's test the ST7789 Display Driver on RTOS ... And render a pink screen!

lupyuen.github.io/articles/st7

1
Lup Yuen Lee 李立源

Why is AAAA pink? Because of RGB565 colour encoding

lupyuen.github.io/articles/st7

1
Lup Yuen Lee 李立源

Here's how we configure the ST7789 Display Driver in RTOS

lupyuen.github.io/articles/st7

1
Lup Yuen Lee 李立源

Running the ST7789 Display Driver on RTOS

lupyuen.github.io/articles/st7

1
Lup Yuen Lee 李立源

Inside the Demo App for RTOS

lupyuen.github.io/articles/st7

1
Lup Yuen Lee 李立源

How we enable Graphics Library and LVGL Demo App on Apache RTOS

lupyuen.github.io/articles/st7

1
Lup Yuen Lee 李立源

Here's how we run the Demo App on RTOS

lupyuen.github.io/articles/st7

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