Unable to write/read to SDHC Cards NRF52840.

Question

Hi There, 
 
 I am presently running a BLE peripheral example on a custom board with SD Card data logging functionality, The SD Card library has worked fine until now , Since I have discovered that it would not work for any SDHC card. 
 nRF5 SDK v17.0.2 
 I have tested this for different manufacturers i.e. SanDisk, Kingston etc. 
 The initialization process fails: It returns 0x01 -> RES_ERROR, /* 1: R/W Error */ 
 NRF_LOG_INFO("Initializing disk 0 (SDC)...");
 for (uint32_t retries = 3; retries && disk_state; --retries)
 {
 disk_state = disk_initialize(0);
 }
 if (disk_state)
 {
 NRF_LOG_INFO("Disk initialization failed.",disk_state);
 return;
 } 
 Is this a known issue ? 
 Are there any configuration flags required to make this work for SDHC cards ? 
 
 Cheers,

Kenneth · Accepted Answer

I could find some cases (for the nRF5 SDK) that hopefully are relevant to solving the problem: https://devzone.nordicsemi.com/f/nordic-q-a/54164/fatfs-example-doesn-t-work-with-sdhc https://devzone.nordicsemi.com/f/nordic-q-a/54805/it-takes-time-to-write-to-the-sdhc-card 
 Best regards, Kenneth

Unable to write/read to SDHC Cards NRF52840.

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