Touch on Sunton ESP32-8048S043C

[oschettler]

I've installed sunton-8048s043c_full_16MB_v0.7.0-rc6_2f4092b.bin
The board has an 800x480 capacitive touch screen.

The display works nicely. However, I've noticed that the touch interface is of an incorrect scale:

When I touch the display a little below and right of the center, the pointer already is in the lower right corner.

The configuration for this board starts here:

openHASP/user_setups/esp32s3/sunton-esp32-s3-tft.ini

Line 123 in 6cf4262

[env:sunton-8048s043c_16MB]

I see TFT_WIDTH=800 and TFT_HEIGHT=480, but also TOUCH_WIDTH=480 and TOUCH_HEIGHT=272. Maybe this is the problem?

Best,
-- Olav

[fvanroie]

Are you sure it is the ESP32-8048S043C and not the ESP32-8048S050C ? Which link did you buy the display from?

If it is an actual ESP32-8048S043C (check the PCB code on the backside), maybe they changed the hardware revision of the touchscreen...

[oschettler]

The board has "ESP32-8048S043" on the back.

[oschettler]

I have compiled a version with TOUCH_WIDTH and THOUCH_HEIGHT fixed:

diff --git a/user_setups/esp32s3/sunton-esp32-s3-tft.ini b/user_setups/esp32s3/sunton-esp32-s3-tft.ini
index 7cbb14d8..73eec22e 100644
--- a/user_setups/esp32s3/sunton-esp32-s3-tft.ini
+++ b/user_setups/esp32s3/sunton-esp32-s3-tft.ini
@@ -144,8 +144,8 @@ build_flags =
     -D TFT_PREFER_SPEED=14000000  ; 1/2 of Typical DCLK Frequency
     -D TFT_AUTO_FLUSH=1
     ; Touch Settings
-    -D TOUCH_WIDTH=480
-    -D TOUCH_HEIGHT=272
+    -D TOUCH_WIDTH=800
+    -D TOUCH_HEIGHT=480
     -D TOUCH_DRIVER=0x911
     -D TOUCH_SCL=20
     -D TOUCH_SDA=19

To make it compile, in platform_override.ini, I also had to add:

extra_default_envs =
    sunton-8048s043c_16MB

I also needed to comment the upload_speed in platform.ini:

[env]
;upload_speed = 921600

With this, I get the full screen width for touch.

Thank you for this fine software.
-- Olav

[Gemelon]

I have the exact same display and I have the exact same problem, how do you resolve the problem?

[RyanEwen]

Do you guys get backlight flicker at 100% and a rolling effect at lower brightnesses? I also get some artifacts when changing pages. Not sure if it's just me