STM32 porting lvgl8.2

One . Preface

Transplanted for most of the day , The final success lies in stm32 On the platform lvgl8.2, I'm really tired .lvgl As a recently popular embedded GUI Open source library , Very powerful , So I chose it . In the process of transplantation , Stepped on many pits , Share it here , Avoid stepping on the pit repeatedly , A waste of time .
Let's first look at the transplant effect , The picture taken by mobile phone is not very clear , You can barely see the effect .
The complete project will be in WeChat official account FPGA The journey give .
The official account of WeChat reply STM32 transplant LVGL Get download link . If the migration fails , For comparison .

Two . Related preparations

1. Prepare one stm32 Complete project , With timer interrupt , as well as lcd Screen drive .
2. lvgl The source code file , The latest one is 8.3 edition .

When you are ready, you can transplant .

3、 ... and . Migration start

1. stay stm32 Project directory , Create a folder lvgl, It is stored in this lvgl All files for .
2. take lvgl Medium src,examples/porting, These two folders , as well as lv_conf_template.h and lvgl.h Copy to the lvgl In the folder .
   
3. Get rid of porting All under folder template suffix .lv_conf_template.h It's also .
   4. take src and porting All files under the folder are added into stm32 List of projects ( Remember all the files , No doubt. ), It's time to test patience . After adding , Then add three more paths
   
4. take lv_conf.g ,lv_port_disp.c and lv_port_disp.h Medium if 0 Change to if 1
   
5. Choose one of the following three , Then comment out the remaining two , then draw_buf That line , Just change it to the one you selected .
   
6. This is the point , stay disp_init Add screen initialization function , And then in disp_flush Add drawing function in . This is to draw the rectangular area . notes Meaning focus ,color_p It's a pointer . It stores this area , Pixel value of each point . Instead of this area showing a color . This is where I misunderstood , I've been debugging for a long time .
   
7. Medium timer interrupt medium , Add this function .
   
8. Main function , initialization lvgl, And display devices , And call timer_handler
   
9. stay lv_conf.h Open the following two macros , Run the program , If there is no mistake , It will be at the bottom of the screen , See the memory usage and frame rate . In this way, there is no need to use routines to determine lvgl Whether it can be displayed normally .
   End