ATMEGA328P ILI9488 hardware SPI not work

barmaleyka · Post by **barmaleyka** » Wed Nov 08, 2023 12:45 pm

Hello. With the ATMEGA328P microcontroller, the ILI9488 SPI display does not work hardware SPI, the MK just hangs. The software SPI works, but very slowly.

Post by **medelec35** » Wed Nov 08, 2023 2:36 pm

Hello.
Can you post your fcfx and .c files please.
Have you run Library updates to make sure you are sung the latest components?

barmaleyka · Post by **barmaleyka** » Thu Nov 09, 2023 5:15 am

: img.PNG (44.48 KiB) Viewed 17607 times

Flowcode1.fcfx: (11.87 KiB) Downloaded 725 times

Flowcode1.c: (110.11 KiB) Downloaded 722 times

Post by **medelec35** » Thu Nov 09, 2023 11:28 am

Hello.
Can you try the attached please.
If it works, it's because the O/P is the SS on SPI hardware.
If unconnected or low, it puts the SPI in slave mode and causes it to lock up.
SS must be either connected to a pull up resistor or set output to high.

barmaleyka · Post by **barmaleyka** » Thu Nov 09, 2023 12:27 pm

Hello. Yes, the MK is working, but the display does not work, the screen is white.

Post by **medelec35** » Thu Nov 09, 2023 1:07 pm

Sorry, I have just spotted you have PrintNumber, then ClearDispaly straight after.
That means you won't see any chars printed.
Try both of the attached projects

barmaleyka · Post by **barmaleyka** » Thu Nov 09, 2023 1:23 pm

Unfortunately both options didn't work

Post by **medelec35** » Thu Nov 09, 2023 5:51 pm

Hello.
I have just ordered a display.
Hopefully, I will then be able to resolve this for you.

Chadb · Post by **Chadb** » Tue Nov 14, 2023 1:30 pm

Hey, I ordered a 3.5" display that claims to be an ILI9488. Reading the comments on Amazon it is actually a ILI9481. I haven't gotten mine yet but might explain why there are some issues. I am going to try to get one of these working with the ESP32. There are a lot of these on Amazon now, so it would seem that this is going to be an issue for driver support.

https://www.amazon.com/dp/B0BWJHK4M6?re ... tails&th=1

Chad

Post by **jgu1** » Tue Nov 14, 2023 4:13 pm

Hi Chad!

I can recommend to use the Ili9488 display with ESP32. Ben have managed to speed these display up and they are really fast. You can also use ST7796 4" and this is the fastest. Have a look here: viewtopic.php?f=3&t=1851

I have some examble with these display as I use as standard setup when I made a new project included touch fuction, I can share with you if you want?

Look forvard to see if Martin is able to speed up with AVR, I know form earlyer these are little slow

Br jorgen

ATMEGA328P ILI9488 hardware SPI not work

ATMEGA328P ILI9488 hardware SPI not work

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Re: ATMEGA328P ILI9488 hardware SPI not work

Re: ATMEGA328P ILI9488 hardware SPI not work

Re: ATMEGA328P ILI9488 hardware SPI not work

Re: ATMEGA328P ILI9488 hardware SPI not work

Re: ATMEGA328P ILI9488 hardware SPI not work

Re: ATMEGA328P ILI9488 hardware SPI not work

Re: ATMEGA328P ILI9488 hardware SPI not work

Re: ATMEGA328P ILI9488 hardware SPI not work