RE: I have a problem!!!

MainOFF — Fri, 22 Sep 2017 15:48:01 GMT

Nordic support team is so enthusiastic. I hope this solution will be added in an other SDK version . Thanks you again!!!

RE: I have a problem!!!

MainOFF — Fri, 22 Sep 2017 15:38:17 GMT

thanks you for your support! I was implemented your code and my project was run correctly.

RE: I have a problem!!!

MainOFF — Fri, 22 Sep 2017 02:00:16 GMT

Thanks you for your suggestion. I am going to test it when I go home and report my result for you. if you have any other solution please tell me!

RE: I have a problem!!!

Jørgen Holmefjord — Thu, 21 Sep 2017 19:09:37 GMT

Hi,

The issue seems to be related to the SD card initialization and the communication between nrf_block_dev_sdc and app_sdcard. When you call disk_initialize(), block_dev_sdc_init() will be called, which again calls app_sdc_init(). This call will succeed the first time, as the SPI interface is only initialized and a transfer is started, before a success error code is returned. app_sdcard will try to initialize the card, and when this fails, it will uninit itself. Unfortunately, no event is passed to nrf_block_dev_sdc to signalize this, so this module is still initialized. This will result in m_active_sdc_dev being set, even though no SD card is enabled, giving wrong error code returns when you have connected the SD card.

[EDIT:] After talking to the developer, we came up with a better solution to this issue. There is in fact an event passed from app_sdcard to nrf_block_dev_sdc when the init of the SD card fails. This event contains an error code/result field, but block_dev_sdc is not uninitialized if field containt an error. The error is however passed to block_dev, where an error reported back to your disk_initializecall. The result of this is block_dev_sdc will be left inited even if an error occurred, causing the issue you are seeing.

To solve this issue, you need to do the following changes:

Between line 83 and 84 of the file nrf_block_dev_sdc.c, add the following code:

if(p_event->result != SDC_SUCCESS) { nrf_block_dev_t const * block_dev = &(p_sdc_dev->block_dev); ret_code_t err_code = block_dev_sdc_uninit(block_dev); APP_ERROR_CHECK(err_code); }
In file app_sdcard.c, remove the call to APP_ERROR_CHECK(app_sdc_uninit()); on line 951.

I will report this bug internally to have it fixed in future SDK releases.

Best regards,

Jørgen

RE: I have a problem!!!

Jørgen Holmefjord — Thu, 21 Sep 2017 14:51:33 GMT

Which SDK version are you using?

RE: I have a problem!!!

Jørgen Holmefjord — Wed, 20 Sep 2017 12:32:06 GMT

What seems to not work? Could you give a more detailed explanation on what happens when you use this code?