SD card uninitialization

RE: SD card uninitialization

ovrebekk — Wed, 05 Aug 2020 08:36:18 GMT

Sorry for the slow response. Stian is currently out in vacation, and I will handle your case in the mean time.

As an exercise have you tried only initializing, using and uninitializing the SPI repeatedly for the SD card, without using it for your sensor also?

It would be interesting to know if it is the re-initialization of the SD card that fails, or if it is related to using the SPI for something else in between.

Unfortunately I don't have the hardware needed to test this myself right now, but I will try to acquire it by tomorrow so I can try to reproduce your issue.

Best regards
Torbjørn

RE: SD card uninitialization

WipfliRa — Thu, 30 Jul 2020 15:04:17 GMT

Hi, saving some IO would be nice and changing the hardware mean an other prototype. It can be done with 2 separate SPIs it already work on my DK. I don't want to use 13 IO instead of 10 (4 presure sensors, 2 accelerometre and 1 SD card)

RE: SD card uninitialization

Stian Røed Hafskjold — Sat, 25 Jul 2020 12:40:01 GMT

Hi, because of summer vacations I will have to look at your issue next week. It sounds to me like the uninit is not successful. Do you need to use the same SPI for both the sensor and the SD card? The nRF52832 has three SPIs. https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52832.ps.v1.1/peripheral_interface.html?cp=4_2_0_14_1#concept_shared_id