# CrossPoint User Guide Welcome to the **CrossPoint** firmware. This guide outlines the hardware controls, navigation, and reading features of the device. ## 1. Hardware Overview The device utilises the standard buttons on the Xtink X4 (in the same layout as the manufacturer firmware, by default): ### Button Layout | Location | Buttons | | --------------- | ---------------------------------------------------- | | **Bottom Edge** | **Back**, **Confirm**, **Left**, **Right** | | **Right Side** | **Power**, **Volume Up**, **Volume Down**, **Reset** | Button layout can be customized in **[Settings](#35-settings)**. --- ## 2. Power & Startup ### Power On / Off To turn the device on or off, **press and hold the Power button for half a second**. In **[Settings](#35-settings)** you can configure the power button to trigger on a short press instead of a long one. To reboot the device (for example if it's frozen, or after a firmware update), press and release the Reset button, and then hold the Power button for a few seconds. ### First Launch Upon turning the device on for the first time, you will be placed on the **[Home](#31-home-screen)** screen. > [!NOTE] > On subsequent restarts, the firmware will automatically reopen the last book you were reading. --- ## 3. Screens ### 3.1 Home Screen The Home Screen is the main entry point to the firmware. From here you can navigate to **[Reading Mode](#4-reading-mode)** with the most recently read book, **[Book Selection](#32-book-selection)**, **[Settings](#35-settings)**, or the **[File Upload](#34-file-upload-screen)** screen. ### 3.2 Book Selection The Book Selection acts as a folder and file browser. * **Navigate List:** Use **Left** (or **Volume Up**), or **Right** (or **Volume Down**) to move the selection cursor up and down through folders and books. You can also long-press these buttons to scroll a full page up or down. * **Open Selection:** Press **Confirm** to open a folder or read a selected book. ### 3.3 Reading Mode See [Reading Mode](#4-reading-mode) below for more information. ### 3.4 File Upload Screen The File Upload screen allows you to upload new e-books to the device. When you enter the screen, you'll be prompted with a WiFi selection dialog and then your X4 will start hosting a web server. See the [webserver docs](./docs/webserver.md) for more information on how to connect to the web server and upload files. > [!TIP] > Advanced users can also manage files programmatically or via the command line using `curl`. See the [webserver docs](./docs/webserver.md) for details. ### 3.5 Settings The Settings screen allows you to configure the device's behavior. There are a few settings you can adjust: - **Sleep Screen**: Which sleep screen to display when the device sleeps: - "Dark" (default) - The default dark sleep screen - "Light" - The same default sleep screen, on a white background - "Custom" - Custom images from the SD card, see [Sleep Screen](#36-sleep-screen) below for more information - "Cover" - The book cover image (Note: this is experimental and may not work as expected) - **Status Bar**: Configure the status bar displayed while reading: - "None" - No status bar - "No Progress" - Show status bar without reading progress - "Full" - Show status bar with reading progress - **Extra Paragraph Spacing**: If enabled, vertical space will be added between paragraphs in the book. If disabled, paragraphs will not have vertical space between them, but will have first-line indentation. - **Short Power Button Click**: Whether to trigger the power button on a short press or a long press. - **Reading Orientation**: Set the screen orientation for reading: - "Portrait" (default) - Standard portrait orientation - "Landscape CW" - Landscape, rotated clockwise - "Inverted" - Portrait, upside down - "Landscape CCW" - Landscape, rotated counter-clockwise - **Front Button Layout**: Configure the order of the bottom edge buttons: - Back, Confirm, Left, Right (default) - Left, Right, Back, Confirm - Left, Back, Confirm, Right - **Side Button Layout**: Swap the order of the up and down volume buttons from Previous/Next to Next/Previous. This change is only in effect when reading. - **Reader Font Family**: Choose the font used for reading: - "Bookerly" (default) - Amazon's reading font - "Noto Sans" - Google's sans-serif font - "Open Dyslexic" - Font designed for readers with dyslexia - **Reader Font Size**: Adjust the text size for reading; options are "Small", "Medium", "Large", or "X Large". - **Reader Line Spacing**: Adjust the spacing between lines; options are "Tight", "Normal", or "Wide". - **Reader Paragraph Alignment**: Set the alignment of paragraphs; options are "Justified" (default), "Left", "Center", or "Right". - **Time to Sleep**: Set the duration of inactivity before the device automatically goes to sleep. - **Refresh Frequency**: Set how often the screen does a full refresh while reading to reduce ghosting. - **Check for updates**: Check for firmware updates over WiFi. ### 3.6 Sleep Screen You can customize the sleep screen by placing custom images in specific locations on the SD card: - **Single Image:** Place a file named `sleep.bmp` in the root directory. - **Multiple Images:** Create a `sleep` directory in the root of the SD card and place any number of `.bmp` images inside. If images are found in this directory, they will take priority over the `sleep.bmp` file, and one will be randomly selected each time the device sleeps. > [!NOTE] > You'll need to set the **Sleep Screen** setting to **Custom** in order to use these images. > [!TIP] > For best results: > - Use uncompressed BMP files with 24-bit color depth > - Use a resolution of 480x800 pixels to match the device's screen resolution. --- ## 4. Reading Mode Once you have opened a book, the button layout changes to facilitate reading. ### Page Turning | Action | Buttons | | ----------------- | ------------------------------------ | | **Previous Page** | Press **Left** _or_ **Volume Up** | | **Next Page** | Press **Right** _or_ **Volume Down** | The role of the volume (side) buttons can be swapped in **[Settings](#35-settings)**. ### Chapter Navigation * **Next Chapter:** Press and **hold** the **Right** (or **Volume Down**) button briefly, then release. * **Previous Chapter:** Press and **hold** the **Left** (or **Volume Up**) button briefly, then release. ### System Navigation * **Return to Book Selection:** Press **Back** to close the book and return to the **[Book Selection](#32-book-selection)** screen. * **Return to Home:** Press and **hold** the **Back** button to close the book and return to the **[Home](#31-home-screen)** screen. * **Chapter Menu:** Press **Confirm** to open the **[Table of Contents/Chapter Selection](#5-chapter-selection-screen)**. --- ## 5. Chapter Selection Screen Accessible by pressing **Confirm** while inside a book. 1. Use **Left** (or **Volume Up**), or **Right** (or **Volume Down**) to highlight the desired chapter. 2. Press **Confirm** to jump to that chapter. 3. *Alternatively, press **Back** to cancel and return to your current page.* --- ## 6. Current Limitations & Roadmap Please note that this firmware is currently in active development. The following features are **not yet supported** but are planned for future updates: * **Images:** Embedded images in e-books will not render.