ChibiOS Free Embedded RTOS

Hi guys,

I figured out that my LCD what actually not working.
Seems like miso and mosi of my device are connected together somewhere...

I'll give some relevant feedback as I get my new high quality lcd working.

Is it the proper configuration for high speed GPIO ?


Is there a function to make a delay of 40ns to make a fast clock ?

Thanks,

Lyris

Hello,

I would like to change the state of a GPIO between a SPI read and write without inducing any delay. Is it possible ?

Right now I got this using ChibiOS SPI:

https://imgur.com/a/ABu8v2z

GPIOs are too slow to do that. I am ready to do some low level driver if necessary but I need ...

It is page 38-39 of the datasheet linked by Fxcoder

datasheet link

Lyris

Ok I thought I could send more clock cycle and discard some data.

I found out that ChibiOS got some contrib for ili9341 driver:

Probably worth spending time to have a look at

https://github.com/ChibiOS/ChibiOS-Contrib/blob/master/os/various/devices_lib/lcd

Hello guys,

I think my lcd is internaly hard-wired to work without chip select pin and only in 8 bits mode with mosi and miso wires since the chinese seller provides the following informations:


Feature:

Size: 2.4 inches
Drive chip: ILI9341
Touch type: without touching
Resolution: 240*320 ...

Ok I'll do that with GPIO thanks.

Lyris

Hello,

I would like to read the status of a lcd with a SPI 5 wire bus. The datasheet gives:

https://imgur.com/a/dHOGWJc

https://imgur.com/a/dHOGWJc

Question 1, should I have a rx buffer of size 32 and discard the 1 data bit during the dummy cycle with the spiStartIgnore ...

Make sense, thank you.

Hi Giovanni,

No the board is not connected to anything but the logic analyzer. I just wanted to check the signals.

Lyris