Hi I have started a small lvgl project using esp32-wrover (8MB PSRAM) and il9488 and xpt2046. But when I run the program, the screen turns black and does not respond.
spi:
clk_pin: 41 ##display SCK and T_CLK
mosi_pin: 42 ##display SDI(MOSI)/touch T_DIN
miso_pin: 40 ##display SDO(MISO)/touch T_DO
display:
- platform: ili9xxx
model: ILI9488_A
cs_pin: 1
dc_pin: 2
reset_pin: 5
invert_colors: false
auto_clear_enabled: false
update_interval: never
id: my_display
touchscreen:
platform: xpt2046
id: touch
cs_pin: 7
interrupt_pin: 15
update_interval: 50ms
threshold: 400
calibration:
x_min: 289
x_max: 3752
y_min: 211
y_max: 3868
transform:
mirror_x: true
mirror_y: true
swap_xy: true
on_touch:
- lambda: |-
ESP_LOGI("cal", "x=%d, y=%d, x_raw=%d, y_raw=%0d",
touch.x,
touch.y,
touch.x_raw,
touch.y_raw
);
lvgl:
displays:
- my_display
pages:
- id: main_page
widgets:
- label:
align: CENTER
text: 'Hello World!'
Please help
andrew_NH
September 3, 2024, 2:22am
2
Any errors in the logs? Can we see the rest of your code?
Can you make sure the text is white?
text_color: 0x000000
1 Like
I tested the text with different colors. And there is no error in the log
esphome:
name: 15-biglcd-lvgl
on_boot:
then:
esp32:
board: esp32-s3-devkitc-1
framework:
type: arduino
# Enable logging
logger:
logs:
component: none
sensor: none
http_request: none
text_sensor: none
# Enable Home Assistant API
api:
reboot_timeout: 0s
ota:
- platform: esphome
password: !secret ota_password
wifi:
ssid: !secret wifi_ssid
password: !secret wifi_password
reboot_timeout: 0s
# manual_ip:
# static_ip: 192.168.1.115
# gateway: 192.168.1.1
# subnet: 255.255.255.0
# dns1: 8.8.8.8
# dns2: 4.4.4.4
# Enable fallback hotspot (captive portal) in case wifi connection fails
ap:
ssid: "15-biglcd-lvgl"
password: !secret web_server_password
web_server:
port: 80
auth:
username: admin
password: !secret web_server_password
psram:
mode: octal
speed: 80MHz
binary_sensor:
- platform: status
name: "Node Status"
id: system_status
debug:
update_interval: 15s
text_sensor:
- platform: debug
device:
name: "Device Info"
reset_reason:
name: "Reset Reason"
sensor:
- platform: debug
free:
name: "Heap Free"
block:
name: "Heap Max Block"
loop_time:
name: "Loop Time"
psram:
name: "Free PSRAM"
spi:
clk_pin: 41 ##display SCK and T_CLK
mosi_pin: 42 ##display SDI(MOSI)/touch T_DIN
miso_pin: 40 ##display SDO(MISO)/touch T_DO
display:
- platform: ili9xxx
model: ILI9488_A
cs_pin: 1
dc_pin: 2
reset_pin: 5
invert_colors: false
auto_clear_enabled: false
update_interval: never
id: my_display
touchscreen:
platform: xpt2046
id: touch
cs_pin: 7
interrupt_pin: 15
update_interval: 50ms
threshold: 400
calibration:
x_min: 289
x_max: 3752
y_min: 211
y_max: 3868
transform:
mirror_x: true
mirror_y: true
swap_xy: true
on_touch:
- lambda: |-
ESP_LOGI("cal", "x=%d, y=%d, x_raw=%d, y_raw=%0d",
touch.x,
touch.y,
touch.x_raw,
touch.y_raw
);
lvgl:
displays:
- my_display
pages:
- id: main_page
widgets:
- label:
align: CENTER
text: 'Hello World!'
Do you need to add your touchscreen id to lvgl?
You have this.
Should it be like this?
I cant really see that being the cause for your black screen but, it didnt look right.
1 Like
Hello, using touch had no effect on the blank screen
andrew_NH
September 3, 2024, 3:39pm
6
Make sure you are updated to 2024.8.1 there are LVGL bug fixes in this release
Are you turning on the backlight for the screen?
Rename your touchscreen to my_touchscreen then use the code below. my_touchscreen is the name in a lot of examples and it’s good to keep consistency. The new format is to use - display_id: name instead of just - name
lvgl:
displays:
- display_id: my_display
touchscreens:
- touchscreen_id: my_touchscreen
1 Like
Ya, i didnt think it was the primary issue, just thought id throw the suggestion out there to try.
If I were you, id go ask in the Esphome Discord channel. Thats where all the developers and really smart people hang out. Youll shouldnt have a problem getting help in there.
1 Like
andrew_NH:
Make sure you are updated to 2024.8.1 there are LVGL bug fixes in this release
Are you turning on the backlight for the screen?
Rename your touchscreen to my_touchscreen then use the code below. my_touchscreen is the name in a lot of examples and it’s good to keep consistency. The new format is to use - display_id: name instead of just - name
lvgl:
displays:
- display_id: my_display
touchscreens:
- touchscreen_id: my_touchscreen
Hi, I am using the latest version 2024.8.3
I even tested with a st7789v LCD and a new esp32-s3 board and had exactly the same problem.
I changed the name of the touch screen to my_touchscreen, but the problem is still not solved
Fallingaway24:
Ya, i didnt think it was the primary issue, just thought id throw the suggestion out there to try.
If I were you, id go ask in the Esphome Discord channel. Thats where all the developers and really smart people hang out. Youll shouldnt have a problem getting help in there.
Thanks for your suggestion
Today I tested with ssd1306 and esp32 and I had the same problem
Does anyone really know where the problem comes from??
clydebarrow
September 6, 2024, 11:03am
11
First confirm your display is working - remove the LVGL stuff and add show_test_card: true and remove update_interval: never in the display config. That should show a test pattern.
Then restore the LVGL config, get rid of the “none” settings for logs (component at least) and copy the complete serial log and post it here.
Are you sure your chip has octal PSRAM? You should see lines like this in the log:
[20:52:10]I (287) MSPI Timing: PSRAM timing tuning index: 10
[20:52:10]I (288) esp_psram: Found 8MB PSRAM device
[20:52:10]I (288) esp_psram: Speed: 80MHz
[20:52:10]I (321) mmu_psram: Read only data copied and mapped to SPIRAM
[20:52:10]I (408) mmu_psram: Instructions copied and mapped to SPIRAM
[20:52:10]I (408) cpu_start: Multicore app
Then at some point you should see:
[21:02:11][C][lvgl:284]: LVGL Setup starts
[21:02:11][C][lvgl:335]: LVGL Setup complete
When the log does the config dump (magenta color) there should be a line like this:
[20:52:15][C][lvgl:086]: LVGL:
You should not see:
[20:58:31][E][component:082]: Component lvgl is marked FAILED
But with your current config you won’t anyway, since you are filtering out all component logs.
You could try setting buffer_size: 25% in the LVGL config - that should enable it to work even without PSRAM.
Posting the complete log here will help diagnosis.
2 Likes
Hello, I tested with this method and there was no problem with the LCD
[20:02:12][C][psram:020]: PSRAM:
[20:02:12][C][psram:021]: Available: NO
[20:02:12][C][status:034]: Status Binary Sensor 'Node Status'
[20:02:12][C][status:034]: Device Class: 'connectivity'
[20:02:12][C][lvgl:032]: LVGL:
[20:02:12][E][component:082]: Component lvgl is marked FAILED
The model I have is ESP32-S3-DevKitC-1 , M0N16R8, but I don’t know what is the cause of this error.
My problem was solved by adding these few lines,
esphome:
name: "15-disp-lvgl"
platformio_options:
build_flags: "-DBOARD_HAS_PSRAM"
board_build.arduino.memory_type: qio_opi
[11:04:42][C][psram:020]: PSRAM:
[11:04:42][C][psram:021]: Available: YES
[11:04:42][C][psram:024]: Size: 8191 KB
