TheBackShed.com

Forum Index : Microcontroller and PC projects : ILI8341 BREADBOARD

Author

Message

georgestheking
Newbie

Joined: 21/12/2021
Location: Belgium
Posts: 32

Posted: 02:17pm 24 Feb 2023

Copy link to clipboard

Print this post

Hi,

There is a new breadboard from China for the pico including I/O and a ILI9341 LCD.
I am trying to use it.
I use the last version of PICOMITE.

first line to init SPI : OPTION system spi GP10,GP11,GP8

i get "Error : DScard already configured"

Any idea ?

Best regards

Georges

matherp
Guru

Joined: 11/12/2012
Location: United Kingdom
Posts: 10633

Posted: 02:25pm 24 Feb 2023

Copy link to clipboard

Print this post

OPTION RESET first?

JohnS
Guru

Joined: 18/11/2011
Location: United Kingdom
Posts: 4148

Posted: 03:09pm 24 Feb 2023

Copy link to clipboard

Print this post

georgestheking said There is a new breadboard from China for the pico including I/O and a ILI9341 LCD.

URL please

John

georgestheking
Newbie

Joined: 21/12/2021
Location: Belgium
Posts: 32

Posted: 04:11pm 24 Feb 2023

Copy link to clipboard

Print this post

Here is the link :

https://fr.aliexpress.com/item/1005004743550177.html?spm=a2g0o.cart.0.0.37c5378dD9TQEh&mp=1&gatewayAdapt=glo2fra

Best regards

Georges

georgestheking
Newbie

Joined: 21/12/2021
Location: Belgium
Posts: 32

Posted: 04:14pm 24 Feb 2023

Copy link to clipboard

Print this post

An for support

https://wiki.52pi.com/index.php?spm=a2g0o.detail.1000023.1.2da3N9ZwN9ZwZx&title=EP-0164

Best regards

Georges

Mixtel90

Guru

Joined: 05/10/2019
Location: United Kingdom
Posts: 8304

Posted: 04:35pm 24 Feb 2023

Copy link to clipboard

Print this post

I'm not certain that that display is compatible with MMBasic. Someone else may know better, but the signals are unfamiliar to me. It looks rather like a serial data input rather than SPI.

The touch device has the signals I would expect for SPI, but it has no IRQ signal.
Edited 2023-02-25 02:41 by Mixtel90

Mick

Zilog Inside! nascom.info for Nascom & Gemini
Preliminary MMBasic docs & my PCB designs

matherp
Guru

Joined: 11/12/2012
Location: United Kingdom
Posts: 10633

Posted: 04:40pm 24 Feb 2023

Copy link to clipboard

Print this post

Based on a brief examination of the pinout of this board there is no way to use it in MMBasic - the wiring appears to be catastrophically stupid - different SPI for touch and the display with the display bitbanged: GP7 for WR makes no sense
Edited 2023-02-25 02:42 by matherp

JohnS
Guru

Joined: 18/11/2011
Location: United Kingdom
Posts: 4148

Posted: 05:06pm 24 Feb 2023

Copy link to clipboard

Print this post

Is it this

In which case is it OK?

edit: was working URL but now I'm getting Bad Gateway

pins used here

John
Edited 2023-02-25 03:10 by JohnS

matherp
Guru

Joined: 11/12/2012
Location: United Kingdom
Posts: 10633

Posted: 05:30pm 24 Feb 2023

Copy link to clipboard

Print this post

Quote In which case is it OK?

See my reply above

JohnS
Guru

Joined: 18/11/2011
Location: United Kingdom
Posts: 4148

Posted: 05:46pm 24 Feb 2023

Copy link to clipboard

Print this post

matherp said

Quote In which case is it OK?

See my reply above

I didn't understand such as "GP7 for WR makes no sense" when GPIO7 isn't called WR.

Sorry. Still mystified.

John

matherp
Guru

Joined: 11/12/2012
Location: United Kingdom
Posts: 10633

Posted: 06:44pm 24 Feb 2023

Copy link to clipboard

Print this post

GP15 WR, GP7 SDI, still complete nonsense

JohnS
Guru

Joined: 18/11/2011
Location: United Kingdom
Posts: 4148

Posted: 06:56pm 24 Feb 2023

Copy link to clipboard

Print this post

Thanks.

John

Mixtel90

Guru

Joined: 05/10/2019
Location: United Kingdom
Posts: 8304

Posted: 08:19pm 24 Feb 2023

Copy link to clipboard

Print this post

Just a guess based on the mnemonics - it isn't SPI.

RST - reset (fair enough!)
CS - device select (probably active low)
RS - register select (to change values in them - probably active low)
WR - write - not sure of polarity
SDI - serial data IO

It's not going to work with MMBasic anyway.

Mick

Zilog Inside! nascom.info for Nascom & Gemini
Preliminary MMBasic docs & my PCB designs

Print this page

To reply to this topic, you need to log in.