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archetypes/post.md

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content/projects/How I sped up Yocto setup with Docker.md

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 comments: false
 description: "Enhancing given environments to avoid extra work."
 canonicalURL: "https://canonical.url/to/page"
-disableHLJS: true # to disable highlightjs
 disableShare: false
 disableHLJS: false
 hideSummary: false

content/projects/esp32-display/index.md

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+---
+title: "Esp32 OLED Counter Display"
+date: 2025-11-10T19:10:33+02:00
+tags: []
+author: "Elias Ahokas"
+showToc: true
+TocOpen: false
+draft: false
+hidemeta: false
+comments: false
+description: "Desc Text."
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+UseHugoToc: true
+cover:
+    image: ""
+    alt: ""
+    caption: ""
+    relative: false
+    hidden: true
+
+---
+
+![Project working](photo_2025-11-10_15-36-01.jpg)
+
+Integrating LVGL embedded graphics library with SSD1306 OLED display on ESP32.
+
+[Source code](https://git.sirian.me/sirian/oled-counter-esp32/src/branch/main)
+
+## Project goal
+
+Get LVGL working on a 128x64 monochrome OLED display connected to ESP32 with I2C. Quick googling resulted only in outdated libraries. This implementation uses the latest libraries to ensure future proofing.
+
+## Main challenge
+
+LVGL outputs pixels in a linear framebuffer format but the display uses page addressing where the screen is divided into 8 horizontal pages of 128x8 pixels. Required implementing a custom flush callback to convert between these formats.
+
+## Implementation
+
+- Custom I2C driver for SSD1306 using ESP-IDF's master driver API
+- Multi-threaded FreeRTOS architecture separating rendering, display updates and application logic
+- Pixel format conversion algorithm for transforming LVGL's I1 framebuffer to SSD1306 page format
+- Queue based page transmission system for non blocking I2C operations
+- Semaphore protected flush pipeline ensuring thread safe rendering

content/projects/hello_portfolio.md

@@ -10,7 +10,6 @@ hidemeta: false
 comments: false
 description: "Desc Text."
 canonicalURL: "https://canonical.url/to/page"
-disableHLJS: true # to disable highlightjs
 disableShare: false
 disableHLJS: false
 hideSummary: false