# lv_draw_eve_display.h (/api/drivers/draw/eve/lv_draw_eve_display_h)



<ApiSummary functions="12" />

Functions [#functions]

<ApiTabs items="[&#x22;Getters (1)&#x22;,&#x22;Other (11)&#x22;]">
  <ApiTab value="Getters (1)">
    <ApiMember kind="function" name="lv_draw_eve_display_get_user_data" file="drivers/draw/eve/lv_draw_eve_display.h" line="49" url="https://github.com/lvgl/lvgl/tree/a7b95c5b0839ce901c09c205610bc2c77cc3345d/src/drivers/draw/eve/lv_draw_eve_display.h#L49">
      lv_draw_eve_display_get_user_data [#lv_draw_eve_display_get_user_data]

      Get the `user_data` parameter that was passed to `lv_draw_eve_display_create`. Useful in the operation callback.

      ```c title=" " lineNumbers=1
      void * lv_draw_eve_display_get_user_data(lv_display_t *disp)
      ```

      <span className="sr-only">
        Parameters
      </span>

      | Name   | Type                                                     | Description                          |
      | ------ | -------------------------------------------------------- | ------------------------------------ |
      | `disp` | <ApiLink name="lv_display_t" display="lv_display_t *" /> | pointer to the lv\_draw\_eve display |

      **Returns:** `void *` — the `user_data` pointer
    </ApiMember>
  </ApiTab>

  <ApiTab value="Other (11)">
    <ApiMember kind="function" name="lv_draw_eve_display_create" file="drivers/draw/eve/lv_draw_eve_display.h" line="41" url="https://github.com/lvgl/lvgl/tree/a7b95c5b0839ce901c09c205610bc2c77cc3345d/src/drivers/draw/eve/lv_draw_eve_display.h#L41">
      lv_draw_eve_display_create [#lv_draw_eve_display_create]

      Create a display for the EVE draw unit.

      ```c title=" " lineNumbers=1
      lv_display_t * lv_draw_eve_display_create(const lv_draw_eve_parameters_t *params, lv_draw_eve_operation_cb_t op_cb, void *user_data)
      ```

      <span className="sr-only">
        Parameters
      </span>

      | Name        | Type                                                                                   | Description                                                                           |
      | ----------- | -------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------- |
      | `params`    | <ApiLink name="lv_draw_eve_parameters_t" display="const lv_draw_eve_parameters_t *" /> | Pointer to a struct of display parameters. Can be a temporary variable                |
      | `op_cb`     | <ApiLink name="lv_draw_eve_operation_cb_t" />                                          | A callback that will be called to perform pin and SPI IO operations with the EVE chip |
      | `user_data` | `void *`                                                                               | use `lv_draw_eve_display_get_user_data` to get this pointer inside the `op_cb`        |

      **Returns:** <ApiLink name="lv_display_t" display="lv_display_t *" /> — the EVE display
    </ApiMember>

    <ApiMember kind="function" name="lv_draw_eve_touch_create" file="drivers/draw/eve/lv_draw_eve_display.h" line="56" url="https://github.com/lvgl/lvgl/tree/a7b95c5b0839ce901c09c205610bc2c77cc3345d/src/drivers/draw/eve/lv_draw_eve_display.h#L56">
      lv_draw_eve_touch_create [#lv_draw_eve_touch_create]

      Create a touchscreen indev for the EVE display.

      ```c title=" " lineNumbers=1
      lv_indev_t * lv_draw_eve_touch_create(lv_display_t *disp)
      ```

      <span className="sr-only">
        Parameters
      </span>

      | Name   | Type                                                     | Description                          |
      | ------ | -------------------------------------------------------- | ------------------------------------ |
      | `disp` | <ApiLink name="lv_display_t" display="lv_display_t *" /> | pointer to the lv\_draw\_eve display |

      **Returns:** <ApiLink name="lv_indev_t" display="lv_indev_t *" /> — the EVE touchscreen indev
    </ApiMember>

    <ApiMember kind="function" name="lv_draw_eve_pre_upload_image" file="drivers/draw/eve/lv_draw_eve_display.h" line="66" url="https://github.com/lvgl/lvgl/tree/a7b95c5b0839ce901c09c205610bc2c77cc3345d/src/drivers/draw/eve/lv_draw_eve_display.h#L66">
      lv_draw_eve_pre_upload_image [#lv_draw_eve_pre_upload_image]

      Upload an image src to RAM\_G now instead of as-needed during rendering.

      ```c title=" " lineNumbers=1
      void lv_draw_eve_pre_upload_image(lv_display_t *disp, const void *src)
      ```

      <span className="sr-only">
        Parameters
      </span>

      | Name   | Type                                                     | Description                                       |
      | ------ | -------------------------------------------------------- | ------------------------------------------------- |
      | `disp` | <ApiLink name="lv_display_t" display="lv_display_t *" /> | pointer to the lv\_draw\_eve display              |
      | `src`  | `const void *`                                           | image src. The value passed to `lv_image_set_src` |
    </ApiMember>

    <ApiMember kind="function" name="lv_draw_eve_pre_upload_font_range" file="drivers/draw/eve/lv_draw_eve_display.h" line="77" url="https://github.com/lvgl/lvgl/tree/a7b95c5b0839ce901c09c205610bc2c77cc3345d/src/drivers/draw/eve/lv_draw_eve_display.h#L77">
      lv_draw_eve_pre_upload_font_range [#lv_draw_eve_pre_upload_font_range]

      Upload font glyphs to RAM\_G now instead of as-needed during rendering. Upload all the glyphs in the range of unicode code points (inclusive of the start and end values). It can be called multiple times with different ranges.

      ```c title=" " lineNumbers=1
      void lv_draw_eve_pre_upload_font_range(lv_display_t *disp, const lv_font_t *font, uint32_t unicode_range_start, uint32_t unicode_range_end)
      ```

      <span className="sr-only">
        Parameters
      </span>

      | Name                  | Type                                                     | Description                                                              |
      | --------------------- | -------------------------------------------------------- | ------------------------------------------------------------------------ |
      | `disp`                | <ApiLink name="lv_display_t" display="lv_display_t *" /> | pointer to the lv\_draw\_eve display                                     |
      | `font`                | <ApiLink name="lv_font_t" display="const lv_font_t *" /> | the font to upload glyphs from                                           |
      | `unicode_range_start` | <ApiLink name="uint32_t" />                              | the first unicode code point in the range of glyphs to upload            |
      | `unicode_range_end`   | <ApiLink name="uint32_t" />                              | the last unicode code point (inclusive) in the range of glyphs to upload |
    </ApiMember>

    <ApiMember kind="function" name="lv_draw_eve_pre_upload_font_text" file="drivers/draw/eve/lv_draw_eve_display.h" line="88" url="https://github.com/lvgl/lvgl/tree/a7b95c5b0839ce901c09c205610bc2c77cc3345d/src/drivers/draw/eve/lv_draw_eve_display.h#L88">
      lv_draw_eve_pre_upload_font_text [#lv_draw_eve_pre_upload_font_text]

      Upload font glyphs to RAM\_G now instead of as-needed during rendering. It will upload all the glyphs needed to render the string `text`. It can be called multiple times with different strings.

      ```c title=" " lineNumbers=1
      void lv_draw_eve_pre_upload_font_text(lv_display_t *disp, const lv_font_t *font, const char *text)
      ```

      <span className="sr-only">
        Parameters
      </span>

      | Name   | Type                                                     | Description                                                          |
      | ------ | -------------------------------------------------------- | -------------------------------------------------------------------- |
      | `disp` | <ApiLink name="lv_display_t" display="lv_display_t *" /> | pointer to the lv\_draw\_eve display                                 |
      | `font` | <ApiLink name="lv_font_t" display="const lv_font_t *" /> | the font to upload glyphs from                                       |
      | `text` | `const char *`                                           | the ASCII or UTF-8 string that will be iterated for glyphs to upload |
    </ApiMember>

    <ApiMember kind="function" name="lv_draw_eve_memread8" file="drivers/draw/eve/lv_draw_eve_display.h" line="99" url="https://github.com/lvgl/lvgl/tree/a7b95c5b0839ce901c09c205610bc2c77cc3345d/src/drivers/draw/eve/lv_draw_eve_display.h#L99">
      lv_draw_eve_memread8 [#lv_draw_eve_memread8]

      Call `EVE_memRead8` for custom low-level control of the display.

      ```c title=" " lineNumbers=1
      uint8_t lv_draw_eve_memread8(lv_display_t *disp, uint32_t address)
      ```

      <span className="sr-only">
        Parameters
      </span>

      | Name      | Type                                                     | Description                                          |
      | --------- | -------------------------------------------------------- | ---------------------------------------------------- |
      | `disp`    | <ApiLink name="lv_display_t" display="lv_display_t *" /> | the display returned by `lv_draw_eve_display_create` |
      | `address` | <ApiLink name="uint32_t" />                              | the EVE address to read from                         |

      **Returns:** <ApiLink name="uint8_t" /> — the read value
    </ApiMember>

    <ApiMember kind="function" name="lv_draw_eve_memread16" file="drivers/draw/eve/lv_draw_eve_display.h" line="107" url="https://github.com/lvgl/lvgl/tree/a7b95c5b0839ce901c09c205610bc2c77cc3345d/src/drivers/draw/eve/lv_draw_eve_display.h#L107">
      lv_draw_eve_memread16 [#lv_draw_eve_memread16]

      Call `EVE_memRead16` for custom low-level control of the display.

      ```c title=" " lineNumbers=1
      uint16_t lv_draw_eve_memread16(lv_display_t *disp, uint32_t address)
      ```

      <span className="sr-only">
        Parameters
      </span>

      | Name      | Type                                                     | Description                                          |
      | --------- | -------------------------------------------------------- | ---------------------------------------------------- |
      | `disp`    | <ApiLink name="lv_display_t" display="lv_display_t *" /> | the display returned by `lv_draw_eve_display_create` |
      | `address` | <ApiLink name="uint32_t" />                              | the EVE address to read from                         |

      **Returns:** <ApiLink name="uint16_t" /> — the read value
    </ApiMember>

    <ApiMember kind="function" name="lv_draw_eve_memread32" file="drivers/draw/eve/lv_draw_eve_display.h" line="115" url="https://github.com/lvgl/lvgl/tree/a7b95c5b0839ce901c09c205610bc2c77cc3345d/src/drivers/draw/eve/lv_draw_eve_display.h#L115">
      lv_draw_eve_memread32 [#lv_draw_eve_memread32]

      Call `EVE_memRead32` for custom low-level control of the display.

      ```c title=" " lineNumbers=1
      uint32_t lv_draw_eve_memread32(lv_display_t *disp, uint32_t address)
      ```

      <span className="sr-only">
        Parameters
      </span>

      | Name      | Type                                                     | Description                                          |
      | --------- | -------------------------------------------------------- | ---------------------------------------------------- |
      | `disp`    | <ApiLink name="lv_display_t" display="lv_display_t *" /> | the display returned by `lv_draw_eve_display_create` |
      | `address` | <ApiLink name="uint32_t" />                              | the EVE address to read from                         |

      **Returns:** <ApiLink name="uint32_t" /> — the read value
    </ApiMember>

    <ApiMember kind="function" name="lv_draw_eve_memwrite8" file="drivers/draw/eve/lv_draw_eve_display.h" line="123" url="https://github.com/lvgl/lvgl/tree/a7b95c5b0839ce901c09c205610bc2c77cc3345d/src/drivers/draw/eve/lv_draw_eve_display.h#L123">
      lv_draw_eve_memwrite8 [#lv_draw_eve_memwrite8]

      Call `EVE_memWrite8` for custom low-level control of the display.

      ```c title=" " lineNumbers=1
      void lv_draw_eve_memwrite8(lv_display_t *disp, uint32_t address, uint8_t data)
      ```

      <span className="sr-only">
        Parameters
      </span>

      | Name      | Type                                                     | Description                                          |
      | --------- | -------------------------------------------------------- | ---------------------------------------------------- |
      | `disp`    | <ApiLink name="lv_display_t" display="lv_display_t *" /> | the display returned by `lv_draw_eve_display_create` |
      | `address` | <ApiLink name="uint32_t" />                              | the EVE address to write to                          |
      | `data`    | <ApiLink name="uint8_t" />                               | the value to write                                   |
    </ApiMember>

    <ApiMember kind="function" name="lv_draw_eve_memwrite16" file="drivers/draw/eve/lv_draw_eve_display.h" line="131" url="https://github.com/lvgl/lvgl/tree/a7b95c5b0839ce901c09c205610bc2c77cc3345d/src/drivers/draw/eve/lv_draw_eve_display.h#L131">
      lv_draw_eve_memwrite16 [#lv_draw_eve_memwrite16]

      Call `EVE_memWrite16` for custom low-level control of the display.

      ```c title=" " lineNumbers=1
      void lv_draw_eve_memwrite16(lv_display_t *disp, uint32_t address, uint16_t data)
      ```

      <span className="sr-only">
        Parameters
      </span>

      | Name      | Type                                                     | Description                                          |
      | --------- | -------------------------------------------------------- | ---------------------------------------------------- |
      | `disp`    | <ApiLink name="lv_display_t" display="lv_display_t *" /> | the display returned by `lv_draw_eve_display_create` |
      | `address` | <ApiLink name="uint32_t" />                              | the EVE address to write to                          |
      | `data`    | <ApiLink name="uint16_t" />                              | the value to write                                   |
    </ApiMember>

    <ApiMember kind="function" name="lv_draw_eve_memwrite32" file="drivers/draw/eve/lv_draw_eve_display.h" line="139" url="https://github.com/lvgl/lvgl/tree/a7b95c5b0839ce901c09c205610bc2c77cc3345d/src/drivers/draw/eve/lv_draw_eve_display.h#L139">
      lv_draw_eve_memwrite32 [#lv_draw_eve_memwrite32]

      Call `EVE_memWrite32` for custom low-level control of the display.

      ```c title=" " lineNumbers=1
      void lv_draw_eve_memwrite32(lv_display_t *disp, uint32_t address, uint32_t data)
      ```

      <span className="sr-only">
        Parameters
      </span>

      | Name      | Type                                                     | Description                                          |
      | --------- | -------------------------------------------------------- | ---------------------------------------------------- |
      | `disp`    | <ApiLink name="lv_display_t" display="lv_display_t *" /> | the display returned by `lv_draw_eve_display_create` |
      | `address` | <ApiLink name="uint32_t" />                              | the EVE address to write to                          |
      | `data`    | <ApiLink name="uint32_t" />                              | the value to write                                   |
    </ApiMember>
  </ApiTab>
</ApiTabs>

Dependencies [#dependencies]

<FileIncludes includes="[&#x22;lv_conf_internal.h&#x22;, &#x22;lv_draw_eve_target.h&#x22;]" includedBy="[&#x22;lv_drivers.h&#x22;]" transitiveIncludes="[&#x22;lv_conf_kconfig.h&#x22;, &#x22;lv_types.h&#x22;]" />