Description
Hi all, I have started experimenting with LVGL in the previous weeks. I have this display, with the RA8875 controller, and FT5206 Capacitive touch controller (I am planning to add support after making the display work).
What are the issues I am encoutering out of the box?
When using the lv_port_esp32 example, I encounter multiple issues, namely:
- The display’s backlight does not turn on, since this specific display uses the internal RA8875’s PWM signal 1, so it should be activated by SPI. (Solved)
- I am not able to select “Half duplex” mode for the SPI. (Solved?)
- After solving the above, the display remains white (See picture in the end).
My MCU is an ESP32 based developer board (Wemos LOLIN32).
How did I solve the above issues?
- I added some code in order to update the PWM register to set the brightness. I have started working on making it more “publishable”, however some support would be needed in order to make a pull request in the future.
- I temporarily Commented the “memory clear” part of the initialization procedure.
// Perform a memory clear (wait maximum of 100 ticks)
ra8875_write_cmd(RA8875_REG_MCLR, 0x80);
for(i = 100; i != 0; i--) {
/* commenting start */
// if ((ra8875_read_cmd(RA8875_REG_MCLR) & 0x80) == 0x00)
// break;
// }
/* commenting end*/
vTaskDelay(1);
}
/* commenting start */
// if (i == 0) {
// ESP_LOGW(TAG, "WARNING: Memory clear timed out; RA8875 may be unresponsive.");
// }
/* commenting end*/
What do I want to achieve?
I would like a fully working display, in order to start to work on porting support for the touch controller.
What have I tried so far?
See “How did I solve the above issues?”
Screenshot and/or video
sdkconfig.txt (59.4 KB)
log.txt (17.6 KB)