Comments (5)
Any NPN transistor will probably do.
press the reset button several times.
It may work with one reset.
Sometimes it works with over 10 resets.
I don't have the exact scope, so I don't know the real cause.
from esp-idf-st7789.
in esp-idf5.0 i had to fix types in ESP_LOG calls.
Thank you for reporting.
This is a big change from ESP-IDF V4.4.
I have a lot of repositories, so I will gradually work on supporting ESP-IDF V5.
For the unsigned int32 logging format, an interim workaround is provided here.
espressif/esp-idf#9511
There are two types of ST7789 breakouts.
One has a CS pin and one does not have a CS pin.
I think there is an electrical problem around reset circuit in the breakout without the CS pin.
Perhaps the reset circuit requires a lot of current.
Ultimately I ended up using the following circuit.
And press the reset button several times.
ESP32 3V3 -------------------------------+
|
| Collector
/
/
ESP32 RES ------------R(2.2K)---------| SS8050
Base \
\
| Emitter
|
ST7789 RST -------------------------------+
|
|
|
|
ESP32 GND ------------R(220)-------------+
from esp-idf-st7789.
Thanks for the answer! I tried this connection (through a transistor) and nothing happened.
My circuit is using no-CS connection.
It turns out that this screen is faulty?
PS. I used 2N3904 instead SS8050
from esp-idf-st7789.
Changing devcfg.mode = 0; works for me.
from esp-idf-st7789.
Changed SPI mode from 2 to 3.
Test results are good.
No pull-up resistor is required on the reset pin.
from esp-idf-st7789.
Related Issues (20)
- TFT backlight not powered on for Lilygo TTGO T-Watch-2020 HOT 4
- Please add a LICENSE to this repository HOT 1
- IMAGE HOT 4
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- IMAGE HOT 14
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- PlatformIO IDE use
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- This Project can not work on esp32C3 HOT 6
- did you original this st7789 library? HOT 2
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- How to display 1 bit depth BMP image? HOT 34
- Slow Refresh Rate of ST7789 Screen Compared to ESP-IDF Screen Library HOT 5
- demo worked, but only 240x240? HOT 1
- SPI data is sampled on rising edge of clock, wrong mode? HOT 1
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from esp-idf-st7789.