spi list feature without ppi

[Haruki Kawakami]

Hi,

I want to use spi list feature without ppi. Is that possible?

Because I have to use the same spi module for OLED, SPI flash and accelerometer with FIFO, spi ppi that I have to set spi tx and rx buffer in advance can't be used.

Thank you.

[Ole Bauck]

What do you mean by using spi list without ppi? If you use the list feature you can configure the END-START shortcut to enable back to back transfers without involving the CPU.

The PTR containing the RAM address of the buffer and the MAXCNT containing the size of the buffer are double buffered which means that they can be updated immediately after the START event is received. If you don't use shortcut or ppi to automate the transfer I don't see why you want to use list feature as you can update the PTR and MAXCNT registers before starting a new transfer.