Hi Roberto, maybe Lup's article can help:
https://lupyuen.github.io/articles/spi2 Which platform do you use? Simon -- Hard- and Softwaredevelopment Consultant Ingenieurbüro-Filgis USt-IdNr.: DE305343278 On Fri, Mar 4, 2022 at 8:41 AM Roberto Bucher <roberto.buc...@supsi.ch> wrote: > Hi > > where can I found a simple example that send n bytes to the SPI and > receive m bytes? > > I can now see the /dev/spi but using simple methods like open and write > doesn't give me any signal on the bus... > > Thanks in advance > > Roberto > >