SPI default data

[durga_choudhury]

MCU: S32K148

IDE S32DS 3.6.6

OS: Windows 11

What does the 'SPI default data' in peripherals tool mean (see the screen shot below)? (It is generated as 0 by the tool, I edited it to 0x12).

To put some context to my question, I am chasing a strange issue like this:

I have peripherals on all 3 of SPI buses. If I configure SPI2 alone, I can read/write the peripheral attached to it just fine. However, if I configure more peripherals, or if SPI2 is not the first SPI logical device, I cannot read it, even though all the initialization/read/write are returning SUCCESS. This is with RTD v3.0.0 with non-autosar drivers. When I say 'cannot read it', I mean that the read call is returning a data of 0x0, even when I configure the 'SPI default data' to something else, which makes me wonder what this field is supposed to do.

[PetrS · Accepted solution]

Hi,

this parameter specifies the default data transmitted when the pointer passed to transfer function of the driver is NULL

BR, Petr