ESP32 | LovyanGFX vs. TFT_eSPI Comparison (ft. 4-wire SPI Interface)

Today's video is about to compare the graphics library LovyanGFX and TFT_eSPI in a 4-wire SPI interface environment.

*Updates*
- Both are set the SPI clock frequency 60 MHz, but they’re operating at 40 MHz internally.
- The SPI clock for fill write operation was set to 27 MHz, resulting in slower fill-related parts of LovyanGFX. You can expect faster performance at 40 MHz normally.

[LovyanGFX]

[TFT_eSPI]

[ER-TFTM035-6 Interfacing Document]

#ESP32 #LovyanGFX #TFTeSPI #4wire #SPI #LVGL

[GadgetAddict]

Great comparison and another example of how powerful the esp32 can be.

[bondold]

Thanks for introducing LovyanGFX to everyone !

The ESP32 cannot set the APB clock to 60MHz.
In fact, either 40MHz or 80MHz is selected.
LovyanGFX selects 40MHz, so we need to check whether TFT_eSPI selects 40MHz or 80MHz.

[mはげ]

Great! It’s interesting. I'm looking forward to results on a real project with this lovyanGFX.

[สุพงศ์เอง]

ESP32 8-bit paralell pins + tocusceen in lvgl please

[deanstarman]

I hope there is a video using a 8-bit parallel mode!!!

[bondold]

He had set LovyanGFX's fill operation to 27MHz, so the bench conditions are not right; LovyanGFX's fill score is unreasonably low.

[nafisahmed]

Love your videos, please teach how to setup LVGL library and configurations for arduino environment.

[gordsh]

Hi Eric, can I use Lovyan GFX with LVGL (SquareLine)?

[michaelomode]

this is not a fair comparison, of course spi is slower than serial. have you bechmarked espi paralell? That would be a better comparisson, I bet you it will be the same...

[paintcob]

Greetings Eric! Thanks for the video, I wanted to ask you about the lovyanGFX library. I'm trying to show a Sprite and it's been difficult, since it only shows the black screen, I'm working with the WT-SC01 module, here is the code:

#define LGFX_USE_V1
#include <LovyanGFX.hpp>
#define LGFX_AUTODETECT
#include <LGFX_AUTODETECT.hpp>

static LGFX lcd;
static LGFX_Sprite sprite(&lcd);

void setup(void)
{
lcd.init();
lcd.setRotation(1);
sprite.createSprite(480, 320);

}
void loop()
{

sprite.fillCircle(50, 50, 50, TFT_BLUE);
sprite.fillCircle(120, 120, 120, TFT_RED);
sprite.pushSprite(0, 0);
delay(100);

}

With the use of the TFT_eSPI library it works perfectly, but I have decided to use the LovyanGFX library since you recommend it in this video for the use of LVGL

[alfredopreciadomolina]

I have tried it with a rpi display wich has support for 125 Mhz SPI, the maximum speed for esp32 is 80Mhz, but the results have been really noticeable working with lovyangfx.

[tobozo]

hey great video :-)

looks like the 60MHz APB speed is ignored by both drivers, so the benchmark may be invalid.

In the LVGL scroll demo, TFT_eSPI appears to be throttled down by the bus (5% cpu for 33 fps ? naaah), which is symptomatic of setting an invalid APB speed.


May I suggest you re-run the benchmark at 40MHz, then run it again at 80MHz, and compare the results ?

This will eventually show that 80MHz can't be achieved with this display (hardware limitations or secondary effects of using loose cables + breadboard).