nrfjprog qspi erase/read failing

RE: nrfjprog qspi erase/read failing

Sigurd Hellesvik — Wed, 22 May 2024 09:02:35 GMT

[quote user="IanS"]

I looked into the QSPI lines using an oscilloscope and found that the CS line had a low slew rate and couldn't transition between hi/lo fast enough for QSPI, even at 2MHz. SPI worked because there were large delays around asserting/de-asserting the CS line. There must be some configuration for that.

The low slew rate appears to be caused by an internal RC circuit for reset pin 0.18 on the module I'm using (BT840XE).

[/quote]

Good job!

[quote user="IanS"]

I swapped the CS line to another free pin and QSPI works fine, with nrfjprog as well. Although, for nrfjprog to work, I need to program the sample first. nrfjprog doesn't allow me to read over qspi when the program is erased.

It's unfortunate that nrfjprog would indicate it was reading the external memory and fill a file with bad data when it was actually not reading anything. Or it would hang and require the process to be killed manually on Windows.

[/quote]

Thanks for the report on this!

RE: nrfjprog qspi erase/read failing

Ian — Fri, 17 May 2024 21:29:40 GMT

The low slew rate appears to be caused by an internal RC circuit for reset pin 0.18 on the module I'm using (BT840XE).

RE: nrfjprog qspi erase/read failing

Sigurd Hellesvik — Mon, 13 May 2024 11:58:09 GMT

[quote user="IanS"]Shouldn't nrfjprog be able to read/erase the qspi regardless of the ncs sdk version?[/quote]

Agreed. I just like to always ask.

[quote user="IanS"]When running the sample, it prints "device not ready" in main.c. It looks like this is due to a timeout at the end of nrfx_qspi_init.[/quote]

It could look like you do not get a connection to the QSPI at all, then.

Connect an oscillosocpe or logic analyzer to the QSPI lines and see if you can see any communication here.

RE: nrfjprog qspi erase/read failing

Ian — Fri, 10 May 2024 22:54:18 GMT

NCS 1.9.2

Although, when I'm trying to use nrfjprog, the device is erased. Shouldn't nrfjprog be able to read/erase the qspi regardless of the ncs sdk version?

This is a custom board, so I added a basic.dts for the it. I copied the qspi dts config from nrf52840dk_nrf52840.dts and only changed the pinout.

When running the sample, it prints "device not ready" in main.c. It looks like this is due to a timeout at the end of nrfx_qspi_init.

RE: nrfjprog qspi erase/read failing

Sigurd Hellesvik — Fri, 10 May 2024 10:27:14 GMT

Hi,

Which version of the SDK do you use?

Try the JESD216 sample. Does that work?

Regards,
Sigurd Hellesvik