Is there a QuadSPI driver for m4?

[evanthompson]

On an i.MX7D processor, I would like to use the QuadSPI (qspi) peripheral from the cortex m4 core. The nxp-provided m4 drivers for bare metal and FreeRTOS include an 'ecspi' driver for the ecspi peripheral, but there is not a driver for the quadspi peripheral included.

Is an m4 QuadSPI driver available anywhere?

Note: this is not a question about booting from quadspi or Execute In Place (XIP) from quadspi flash. I am asking about using the quadspi as a peripheral at runtime, from the m4 (and the m4 is executing out of another memory like TCM or DDR).

[jeff_hane]

If you have the FlexSPI driver enabled in Linux it will configure the interface to be memory mapped so there is no need for a driver on the M4

jeff

[evanthompson]

That may be true for reads (I have not tried it), but the QuadSPI does not support memory-mapped writes (the peripheral's AHB Bus interface only provides a read operation).

[jeff_hane]

Ah, sorry I am using an iMX8 which does both read/write

[jamesbone · Accepted solution]

Unfortunately Nop, the SDK provided with the FReeRTOS and the baremetal drivers that you already review are the only drivers that we have ,since usually as you also mention the QuadSPI we leave it for booting device and not as a peripheral. I apologize for the inconvenience.

We can offer you our Professional Services, they can help you in develop the proper driver for the Quad SPI. here is the link for more details :

NXP Professional Services | NXP 

Have a great day,
TIC

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