SD Card And NRF52832

RE: SD Card And NRF52832

Jørgen Holmefjord — Tue, 09 Apr 2019 07:34:36 GMT

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RE: SD Card And NRF52832

Shahrear — Tue, 09 Apr 2019 07:27:22 GMT

How big SD Card we can mount? 32GB Possible? do i need to format it first or nrf will format?

RE: SD Card And NRF52832

Jørgen Holmefjord — Mon, 18 Jun 2018 08:04:07 GMT

It should be possible to use same pins, but you cannot use both SPI instances at the same time. I would recommend using two set of pins for two instances, or uninit the driver/SDC library and reinit SPI for the second device on same instance. Please also have a look at this thread.

RE: SD Card And NRF52832

Anar — Fri, 15 Jun 2018 12:33:42 GMT

Can I use the same pins for 2 different instances of SPI?

RE: SD Card And NRF52832

Jørgen Holmefjord — Fri, 15 Jun 2018 08:51:26 GMT

Please have a look at my answer in this thread. It would be much simpler to use a second SPI instance for other SPI devices.

RE: SD Card And NRF52832

Anar — Thu, 14 Jun 2018 19:37:54 GMT

Yeah, I have almost solved this problem.

Can I also ask you one more question?
How can I use fatfs example and spi peripheral in one project? (The same pins and instance)
Because when I try to use SPI functions (like transfer) after the disk (sd card) initializing it gives me error and reset.

RE: SD Card And NRF52832

Jørgen Holmefjord — Wed, 13 Jun 2018 12:15:36 GMT

I gave you some suggestions on checking the voltage levels. Did you do this? Otherwise you need to contact the developers of the board and ask for details on how to use the SD card slot with external 3.3V devices.

RE: SD Card And NRF52832

Anar — Wed, 13 Jun 2018 11:48:40 GMT

Yeah, I know that the issue must be with the board, but is there solution for this?

RE: SD Card And NRF52832

Jørgen Holmefjord — Wed, 13 Jun 2018 11:25:35 GMT

I would recommend that you check the voltage levels of the outputs of the U3 IC according to the schematics, to make sure it is within acceptable range for the SD card.

Since the example is working when you connect it to the SD card directly, there is no issue on the nRF chip. The issue must be with the board where the SD card slot is mounted.

RE: SD Card And NRF52832

Anar — Wed, 13 Jun 2018 10:28:26 GMT

I connected it like this :

miso -> p0.24
mosi -> p0.23
sck -> p0.25
cs -> p0.22
vcc -> vdd
gnd -> gnd

And I also set the jumper to 3.3V voltage level, but still getting the same error
<info> app: FATFS example started.
<info> app: Initializing disk 0 (SDC)...
<info> app: Disk initialization failed.

I'm using SDK 15.

RE: SD Card And NRF52832

Jørgen Holmefjord — Wed, 13 Jun 2018 08:03:00 GMT

Hi,

Your board have a TXB0106 Voltage-Level Translator to support 5V signals from Arduino and other platforms. If you have set the board in 5V mode (Jumper J1), the VCC input of port B of the level translator is most likely connected to 5V. The specifications say Logic High Signal is minimum 0.65 x VCC = 0.65 x 5V = 3.25V. The GPIOS of the nRF52832 might not provide this level. On our DK it is usually between 2.8 and 3.0V.

Have you cheked the position of the jumper, and could you try setting it to 3.3V if it was set to 5V?

Best regards,
Jørgen

RE: SD Card And NRF52832

Anar — Tue, 12 Jun 2018 16:20:56 GMT

Additionally, I also tried to connect this board to arduino and it works fine!