Thank you danielmartynek for answer me; yes you are right, the question is very generic because I've different kind of troubles, but let me be more specific, then.
That is exactly what I'm trying to do, but I'm supposed to write low level code, and that's not exactly what I can see from the examples.
First of all, I found something more studying libraries' implementation and surfing the internet, but it's not clear which is the correct "routine" that should be implemented: how can I set the correct mode? should I write the register address and then the data? How can I do it?
To be clear, the most similar thing I found is this: HMC5883L triple axis magnetometer interfacing with LPC2148 | ARM7.. but I didn't found anything about the equivalent registers of the S32K148EVB, I found no documentation about the list of command bytes and registers of the EVB, unlike the IMU that have some description of its registers in the datasheet. How does this program work? When I write the byte in the correct register, what makes it shift from the master to the slave? Does it happens automatically after the initialization of SPI?
I found also this: https://pdfserv.maximintegrated.com/en/an/AN4184.pdf that is a different way to work, but controlling the single pins seems to me not a good alternative, how can the clock be a real clock for example?
And I found also this very interesting: https://www.nxp.com/docs/en/application-note/AN5413.pdf but I can't understand where it writes the data byte, given the fact that no address is written (should I write the correct address and then the correct byte in the same way? How does the slave know when I'm writing a register address or a byte to be written there?) . Which pins does it use? Why does it says:
* Pin number | Function
* ----------------- |------------------
* PTB14 | LPSPI1_SCK
* PTB15 | LPSPI1_SIN
* PTB16 | LPSPI1_SOUT
* PTB17 | LPSPI1_PCS3
if in the documentation https://www.nxp.com/docs/en/quick-reference-guide/S32K148EVB-QSG.pdf it says in HMI mapping that:
SBC_SCK - PTA28(LPSPI1_SCK)
SBC_MISO - PTA29(LPSPI1_SIN)
SBC_MOSI - PTA27(LPSPI1_SOUT)
SBC_CS - PTA26(LPSPI1_PCS0) ?
And another problem is... where is PTA26 that seems to be mentioned only here?
Thank you in advance for any help, I hope I've been more clear.
Best Regards, Marco
