SPI - lcd interface with ILI9341 driver Topic is solved

[Lyris]

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

datasheet link

Lyris

[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 some guidance.

Lyris

[Giovanni]

You can do that using PAL, GPIO is very fast, I don't understand what you mean with delays.

Giovanni

[Lyris]

Is it the proper configuration for high speed GPIO ?

Code: Select all

palSetPadMode(GPIOB, DCX_PAD, PAL_MODE_OUTPUT_PUSHPULL | PAL_STM32_OSPEED_HIGHEST);

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

Thanks,

Lyris

[Giovanni]

There is a delay function in the GPT driver.

Giovanni

[Lyris]

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.