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mflash_drv.c - writing to flash while XIP

Question asked by mmlee on Aug 28, 2019
Latest reply on Aug 30, 2019 by jeremyzhou

I'm trying to get the mflash_drv.c to work, which seems to be be able to write to the hyperflash while XIP from it.

I found the driver in SDK_2.6.1_EVKB-IMXRT1050\rtos\amazon-freertos\lib\third_party\mcu_vendor\nxp\mflash\mimxrt1052

I'm on the EVKB running from hyperflash.


I've put all the mflash_drv.c functions into ITCM (verified by looking at the PC), as well as all the fsl_flexspi.c functions.


I'm calling mflash_drv_init(); first and then mflash_drv_write_page();. 

The mflash_drv_write_page() always results in a reset after calling CLOCK_DisableClock(kCLOCK_FlexSpi); in mflash_drv_write_page_internal().

I don't really understand why.


Any idea what I'm doing wrong? Is it possible that my clocks or pins are wrong? How is this driver supposed to be used?