Access to QSPI FLash over FLEXSPI from A53 core on IMX8MM in bare metal

[mare1490]

Hello .. I am doing bare metal application on IMX8MMini with A53 core. I do not want to use Linux, i want strictly bare metal application. I want to access QSPI flash over FlexSPI.

Is that possible from A53 core? Also, I want to do that from M4 side also. I would like to use IP commands. I see that in SDK for M4 there is no example for that, Could you refer some examples or starting point where I can see how this can be done?

Thank you and best regards

[mare1490]

Thank you for you answer.

1. I also have a question regarding FlexSPI clock. I can not find a ROOT clock for FLEXSPI in IMX8MM. In EVK-MIMXRT1050 there exists kCLOCK_FlexSpi. I see that for FlexSPI clock in IMX8MM it is necessary to enable QSPI clock, AHB and IPG, is that correct? What about Flexspi clock itself?

2.Regarding #define EXAMPLE_FLEXSPI_AMBA_BASE  FlexSPI_AMBA_BASE in EVK-MIMXRT1050.

What should I put in case of IMX8MM? Is that the address of QSPI?

Thank you in advance

[igorpadykov]

CCM and clocks may be different in these processors,

for FLEXSPI_*_BASE one can look at 10.2.2 Glossary for FlexSPI module Reference Manual

Best regards
igor

[igorpadykov]

Hi Marko

yes this is possible from A53 core. For M4 SDK example one can look at SDK_EVK-MIMXRT1050

(it has similar FlexSPI module)   https://mcuxpresso.nxp.com/en/welcome

Best regards
igor