esp32 MIPI驱动程序

<h1 align="center"> LittlevGL - Open-source Embedded GUI Library</h1> <p align="center"> <a href="https://github.com/littlevgl/lvgl/blob/master/LICENCE.txt"><img src="https://img.shields.io/badge/licence-MIT-blue.svg"></a> <a href="https://github.com/littlevgl/lvgl/releases/tag/v5.3"><img src="https://img.shields.io/badge/version-v5.3-blue.svg"></a> <br> <img src="https://littlevgl.com/github/cover_ori_reduced_2.gif"> </p> <p align="center"> LittlevGL provides everything you need to create a Graphical User Interface (GUI) on embedded systems with easy-to-use graphical elements, beautiful visual effects and low memory footprint. </p> <h4 align="center"> <a href="https://littlevgl.com">Website </a> &middot; <a href="https://littlevgl.com/live-demo">Live demo</a> &middot; <a href="https://docs.littlevgl.com/#PC-simulator">Simulator</a> &middot; <a href="https://docs.littlevgl.com/">Docs</a> &middot; <a href="https://blog.littlevgl.com/">Blog</a> </h4> <!-- <p align="center"> :star: Star the project if you like it! And share with your friends <a href="https://twitter.com/intent/tweet?text=LittlevGL%20is%20a%20free%20and%20open%20source%20embedded%20GUI%20library%20with%20easy-to-use%20graphical%20elements,%20beautiful%20visual%20effects%20and%20low%20memory%20footprint.&url=https://littlevgl.com/&hashtags=littlevgl,embedded,gui,free,opensource"><img src="https://img.shields.io/twitter/url/http/shields.io.svg?style=social"></a> </p> --> ### Features * **Powerful building blocks** buttons, charts, lists, sliders, images, etc. * **Advanced graphics** with animations, anti-aliasing, opacity, smooth scrolling * **Various input devices** touch pad, mouse, keyboard, encoder, buttons, etc. * **Multi-language support** with UTF-8 encoding * **Fully customizable** graphical elements * **Hardware independent** to use with any microcontroller or display * **Scalable** to operate with little memory (64 kB Flash, 10 kB RAM) * **OS, External memory and GPU** supported but not required * **Single frame buffer** operation even with advances graphical effects * **Written in C** for maximal compatibility * **Simulator** to develop on PC without embedded hardware * **Tutorials, examples, themes** for rapid development * **Documentation** and API references online ### Supported devices Basically, every modern controller - which is able to drive a display - is suitable to run LittlevGL. The minimal requirements: - **16, 32 or 64-bit** microcontroller or processor - **&gt; 16 MHz** clock speed - **&gt; 8 kB RAM for static data** and **&gt; 2 KB RAM for dynamic data** (graphical objects) - **&gt; 64 kB flash** program memory - **Optionally ~1/10 screen sized memory** for buffered drawing (on 240 × 320, 16-bit colors it's 15 kB) Just to mention some **platforms**: - STM32F1, STM32F3, [STM32F4](https://blog.littlevgl.com/2017-07-15/stm32f429_disco_port), [STM32F7](https://github.com/littlevgl/stm32f746_disco_no_os_sw4stm32) - Microchip dsPIC33, PIC24, PIC32MX, PIC32MZ - NXP Kinetis, LPC, iMX - [Linux frame buffer](https://blog.littlevgl.com/2018-01-03/linux_fb) (/dev/fb) - [Raspberry PI](http://www.vk3erw.com/index.php/16-software/63-raspberry-pi-official-7-touchscreen-and-littlevgl) - [Espressif ESP32](https://github.com/littlevgl/esp32_ili9431) - Nordic nrf52 - Quectell M66 ### Quick start in a simulator The easiest way to get started with LittlevGL is to run it in a simulator on your PC without any embedded hardware. Choose a project with your favourite IDE: | Eclipse | CodeBlock | Visual Studio | PlatfomIO | Qt Creator | |-------------|----------- |---------------|-----------|------------| | [](https://github.com/littlevgl/pc_simulator_sdl_eclipse) | [](https://github.com/littlevgl/pc_simulator_win_codeblocks) | [](https://github.com/littlevgl/visual_studio_2017_sdl_x64) | [](https://github.com/littlevgl/pc_simulator_sdl_platformio) | [](https://blog.littlevgl.com/2019-01-03/qt-creator) | | Cross-platform<br>with SDL | Native Windows | Cross-platform<br>with SDL | Cross-platform<br>with SDL | Cross-platform<br>with SDL | ### Porting to an embedded hardware In the most simple case you need to do these steps: 1. Copy `lv_conf_templ.h` as `lv_conf.h` next to `lvgl` and set at least `LV_HOR_RES`, `LV_VER_RES` and `LV_COLOR_DEPTH`. 2. Call `lv_tick_inc(x)` every `x` milliseconds in a Timer or Task (`x` should be between 1 and 10) 3. Call `lv_init()` 4. Register a function which can **copy a pixel array** to an area of the screen: ```c lv_disp_drv_t disp_drv; /*Descriptor of a display driver*/ lv_disp_drv_init(&disp_drv); /*Basic initialization*/ disp_drv.disp_flush = disp_flush; /*Set your driver function*/ lv_disp_drv_register(&disp_drv); /*Finally register the driver*/ void disp_flush(int32_t x1, int32_t y1, int32_t x2, int32_t y2, const lv_color_t * color_p) { int32_t x, y; for(y = y1; y <= y2; y++) { for(x = x1; x <= x2; x++) { sep_pixel(x, y, *color_p); /* Put a pixel to the display.*/ color_p++; } } lv_flush_ready(); /* Tell you are ready with the flushing*/ } ``` 5. Register a function which can **read an input device**. E.g. for a touch pad: ```c lv_indev_drv_init(&indev_drv); /*Descriptor of a input device driver*/ indev_drv.type = LV_INDEV_TYPE_POINTER; /*Touch pad is a pointer-like device*/ indev_drv.read = touchpad_read; /*Set your driver function*/ lv_indev_drv_register(&indev_drv); /*Finally register the driver*/ bool touchpad_read(lv_indev_data_t * data) { static lv_coord_t last_x = 0; static lv_coord_t last_y = 0; /*Save the state and save the pressed cooridnate*/ data->state = touchpad_is_pressed() ? LV_INDEV_STATE_PR : LV_INDEV_STATE_REL; if(data->state == LV_INDEV_STATE_PR) touchpad_get_xy(&last_x, &last_y); /*Set the coordinates (if released use the last pressed cooridantes)*/ data->point.x = last_x; data->point.y = last_y; return false; /*Return `false` because we are not buffering and no more data to read*/ } ``` 6. Call `lv_task_handler()` periodically every few milliseconds. For a detailed description check the [Online documatation](https://docs.littlevgl.com/#Porting) or the [Porting tutorial](https://github.com/littlevgl/lv_examples/blob/master/lv_tutorial/0_porting/lv_tutorial_porting.c) ### Code examples #### Create a button with a label and assign a click callback ```c lv_obj_t * btn = lv_btn_create(lv_scr_act(), NULL); /*Add a button the current screen*/ lv_obj_set_pos(btn, 10, 10); /*Set its position*/ lv_obj_set_size(btn, 100, 50); /*Set its size*/ lv_btn_set_action(btn, LV_BTN_ACTION_CLICK, btn_action);/*Assign a callback to the button*/ lv_obj_t * label = lv_label_create(btn, NULL); /*Add a label to the button*/ lv_label_set_text(label, "Button"); /*Set the labels text*/ lv_res_t btn_action(lv_obj_t * btn) { printf("Clicked\n"); return LV_RES_OK; } ```  #### Modify the styles ```c static lv_style_t style_btn_rel; /*A variable to store the released style*/ lv_style_copy(&style_btn_rel, &lv_style_plain); /*Initialize from a built-in style*/ style_btn_rel.body.border.color = LV_COLOR_HEX3(0x269); style_btn_rel.body.border.width = 1; style_btn_rel.body.main_color = LV_COLOR_HEX3(0xADF); style_btn_rel.body.grad_color = LV_COLOR_HEX3(0x46B); style_btn_rel.body.shadow.width = 4; style_btn_rel.body.shadow.type = LV_SHADOW_BOTTOM; style_btn_rel.body