S32KのトピックRe: S32K341 QuadSPI

S32K341 QuadSPI

Mateusz_K — Tue, 14 May 2024 13:39:49 GMT

I want to use external flash with S32K341. I am trying to read id of the external flash memory. When I try to do using IP command, I get stuck waiting for SR[BUSY] flag to become 0. Data, cs, and clk lines quiet. Data lines are in a high state, clk is low. I want to use internal FIRC.

What steps duirng the initialization am i missing?

1. QuadSPI clock enable in MC_ME

2. Pin setup, copied from the example in RTD package, considering S32K342 quad spi.

3. Enable QuadSPI by MCR module

4. Unlocking LUT, writing sequence (cmd(0x9F), read, stop) on 0 index, locking LUT

5. Starting by writing address 0x00 to SFAR and 0 to IPCR[SEQID], 4 to IDATSZ

Why are the no signal on data lines?

Re: S32K341 QuadSPI

davidtosenovjan — Wed, 15 May 2024 13:00:15 GMT

Why you are not using NXP drivers?

A driver is a part of RTD FLS drivers pack (real-time time flash driver, supporting internal flash as well as QuadSPI):
https://www.nxp.com/design/software/automotive-software-and-tools/real-time-drivers-rtd:AUTOMOTIVE-RTD

Otherwise there is an appnote dealing with QuadSPI:

https://www.nxp.com/docs/en/application-note/AN12193.pdf

QuadSPI is highly configurable module because it uses look-up tables for SPI commands what should theoretically allow user to adapt the code to any SPI memory.

Re: S32K341 QuadSPI

Mateusz_K — Thu, 16 May 2024 12:09:46 GMT

Thank you for the answer. I am communicating with the device with through ARM DAP. I am relaying on the drivers but not using them.

I managed to properly initialize the device. Now I want to read the ID of the Ext flash. I am sending proper command, and getting right answer. RBSR register shows that new data appeared in the buffer. But when I read the RDBR register there is no data in them.