Description
Following my last post, I have made a bunch of progress. I have created code for communicating with my display, and now I’m trying to create a minimal LVGL example.
What MCU/Processor/Board and compiler are you using?
A LilyGo T-Display-S3, which combines an ESP32S3 with an st7789.
I’m using PlatformIO with the Arduino framework and LVGL 9.
What do you want to achieve?
A minimal example. I just want to set the display to a nice color or print a letter.
What have you tried so far?
This gist shows the code I have so far:
ESP32 st7789 minimal example (github.com)
display.h and display.cpp contain my code for communicating with the display.
Now I’m trying to create an LVGL example in main.cpp. I’m very much confused about what to do here. A bunch of examples seem to make use of a lv_disp_drv_t, which I don’t understand. Are there many ways to do the same thing, or is there one ideal way?
Following Generic MIPI DCS compatible LCD Controller driver — LVGL documentation, I’m trying to use lv_st7789_create.
I’m following many examples I have seen that create a flush_cb = [](lv_display_t *disp, const lv_area_t *area, uint8_t *pix_map);, but that doesn’t match the signature of the send_color argument expected by lv_st7789_create.
So, I don’t know how to implement send_cmd_cb and send_color_cb.
What am I missing to display my first example on the screen?
Also, is my setup to handle the ticks good? I have seen mentions of a LV_TICK_CUSTOM that can be defined. It sounds like that could be used to avoid handling time manually.