nrf52840 QSPI flash performance

[nononoidea]

1. I am trying to test the QSPI flash performance in nrf52840_DK  ,but the QSPI init failed because of the event ready check,can i turn off the event check process?

2.  I cant found any  configuration  item  about  QSPI easy_dma   in sdk_config.h?what the DMA depth about QSPI easy_dma? is there any easy_dma configuration item in sdk_config.h?

[Simonr]

Hi

1. Why do you want to skip the EVENTS_READY check? This event makes sure that the QSPI peripheral is ready, and I suggest that you make sure it is before running QSPI tasks.

2. No, there aren't any configuration needed for EasyDMA in the QSPI peripheral as the QSPI peripheral automatically takes care of splitting DMA transfers into page writes.

Best regards,

Simon

[nononoidea]

on the one hand,i  have been testing   the flash performance, on the other, i am trying to repace the current flash chip with other chip , but the QSPI failed because of the EVENTS_READY check. Does the nrf52840 QSPI  just support the current chip on the  nrf52840-DK board?

[Simonr]

Hi

In order to make the example compatible with other external flash chips, you have to edit the parameters in nrf_serial_flash_params_t in the nrf_serial_flash_params.c file to match your external flash. The parameters should be listed in the flash datasheet.

Best regards,

Simon

[nononoidea]

I am using SDK16.0 QSPI  example  code to test the external flash. I found that QSPI send command 5 in the  init activate operation,   is it a necessary step ?  can I ignore the step to the next step?

[Simonr]

Hi

I'm sorry, but I don't understand what command or operation you're referring to, can you please specify what step you want to skip in the QSPI example?

Best regards,

Simon