添加智能灯固件代码

firmware/esp-idf/wumei-smart-firmware/examples/storage/spiffsgen/README.md

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+# SPIFFS Image Generation on Build Example
+
+(See the README.md file in the upper level 'examples' directory for more information about examples.)
+
+This example demonstrates how to use the SPIFFS image generation tool [spiffsgen.py](../../../components/spiffs/spiffsgen.py) to automatically create a SPIFFS
+filesystem image from the contents of a host folder during build, with an option of
+automatically flashing the created image on invocation of `idf.py -p PORT flash`.
+For more information, see description of `spiffsgen.py` on the ESP-IDF Programming Guide under API Reference > Storage > SPIFFS Filesystem.
+
+The following gives an overview of the example:
+
+1. There is a directory `spiffs_image` from which the SPIFFS filesystem image will be created.
+
+2. The function `spiffs_create_partition_image` is used to specify that a SPIFFS image
+should be created during build for the `storage` partition. For CMake, it is called from [the main component's CMakeLists.txt](./main/CMakeLists.txt);
+for Make, from the [project Makefile](./Makefile). `FLASH_IN_PROJECT` specifies that the created image
+should be flashed on invocation of `idf.py -p PORT flash` together with app, bootloader, partition table, etc.
+For both build systems, the image is created on the example's build directory with the output filename `storage.bin`.
+
+3. Upon invocation of `idf.py -p PORT flash monitor`, application loads and
+finds there is already a valid SPIFFS filesystem in the `storage` partition with files same as those in `spiffs_image` directory. The application is then
+able to read those files.
+
+## How to use example
+
+### Build and flash
+
+To run the example, type the following command:
+
+```Makefile
+# Make
+make flash monitor
+```
+or 
+```CMake
+# CMake
+idf.py -p PORT flash monitor
+```
+
+(To exit the serial monitor, type ``Ctrl-]``.)
+
+See the Getting Started Guide for full steps to configure and use ESP-IDF to build projects.
+
+## Example output
+
+Here is the example's console output:
+
+```
+...
+I (10) example: Initializing SPIFFS
+I (110) example: Partition size: total: 896321, used: 171935
+I (110) example: Reading hello.txt
+I (110) example: Read from hello.txt: Hello World!
+I (110) example: Computing alice.txt MD5 hash
+I (330) example: Computed MD5 hash of alice.txt: deeb71f585cbb3ae5f7976d5127faf2a
+I (330) example: SPIFFS unmounted
+```
+
+The logic of the example is contained in a [single source file](./main/spiffsgen_example_main.c), and it should be relatively simple to match points in its execution with the log outputs above.