RE: SPI driver: MISO driving low.

M_VLV — Fri, 17 Aug 2018 11:19:59 GMT

Thanks for advice.

I have just set MISO line in high level after initialization SPI and data become same as on nrf51.

Regards

RE: SPI driver: MISO driving low.

Håkon Alseth — Thu, 14 Jun 2018 10:50:11 GMT

Hi,

[quote user=""]I.e. I send request for ID (REMS) and I got responce 0x00, 0x00, 0x01, 0x18 instead 0xFF, 0xFF, 0x01, 0x18.
Whatever, I thought, correct data still incoming.
But when I tried go futher on code to make test read-write-read data on flash, code is not working anymore. I suppose, this is because different behaviour of MISO line in comparation with nRF51.[/quote]

According to the datasheet that you linked to, the first two bytes are high-impedance (ie: could float high or low), so they should be discarded anyway. It is purely random that they are read as 0 on the nRF51 and 0xFF on the nRF52.

Have you tried scoping the SPI lines to see if there is any difference between the two implementations that could explain that it stops working on the nRF52 device?

Best regards,

Håkon