Not able to write and read more than 16KB data in the qspi memory on nrf52840

RE: Not able to write and read more than 16KB data in the qspi memory on nrf52840

Rajat — Fri, 28 Feb 2020 10:40:14 GMT

That fixed it
I used a timeout in wait_for_peripheral function. But to write big chunks of data , i think we need to wait untill the whole data is written.

Its fixed now.

Thanks

RE: Not able to write and read more than 16KB data in the qspi memory on nrf52840

Edvin — Tue, 18 Feb 2020 14:43:06 GMT

Please try to right click the link you want to send from infocenter and click "copy link address". The link in the URL doesn't update when you click links in infocenter. What function did you refer to?

When you do your tests, do you wait for the writes to finish before you read back?

Best regards,

Edvin

RE: Not able to write and read more than 16KB data in the qspi memory on nrf52840

Rajat — Fri, 14 Feb 2020 04:39:26 GMT

Correct me if i am wrong
Disable function for the softdevice is used is this one
https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.s140.api.v6.0.0%2Findex.html&cp=4_5_3_4
But it doesn't help , same problem

RE: Not able to write and read more than 16KB data in the qspi memory on nrf52840

Rajat — Fri, 14 Feb 2020 04:25:07 GMT

If it were a buffer problem , it would have also occured when i do only the writing the data.
But problem arises only when i try to read it back after writing

RE: Not able to write and read more than 16KB data in the qspi memory on nrf52840

Rajat — Fri, 14 Feb 2020 04:24:01 GMT

MY_DATA_SIZE is 65532 and Hardware is quectel bg-96(based on nrf52840) with the same qspi memory as the nrf52 PDK.
Chip Name is MX25R6435F

RE: Not able to write and read more than 16KB data in the qspi memory on nrf52840

Edvin — Thu, 13 Feb 2020 15:48:35 GMT

Hello,

When you use nrf_drv_qspi_write(m_my_buffer, MY_DATA_SIZE); what is the buffer size of m_my_buffer, and what is MY_DATA_SIZE?

somewhere you have initialized m_my_buffer[n]. What is n?

Perhaps you can show me how you use nrf_drv_qspi_write and read? However, it sounds like some buffer overflow. Does this also happen if you do not use the softdevice (Just for testing and root cause investigation)?

What HW do you use? Is it the nRF52840 DK? Or is it custom HW? If it is custom, what external QSPI flash do you use?

Best regards,

Edvin

RE: Not able to write and read more than 16KB data in the qspi memory on nrf52840

Rajat — Thu, 13 Feb 2020 06:04:15 GMT

Correction :

2. If i write more than 16KB data to QSPI memory and read it back after writing is finished , I am not able to read the data , the software get paused saying , unknown function at 0x000000978