I had a similar issue (doesn't quite seem the same though).The fix in this post solved my problem. (see the post near the bottom by Hockuba.Krzysztof October 12, 2018 at 8:06 AM)https://community.st.com/s/question/0D50X00009XkeZ4SAJ/stm32l4-sdmmc-com...
A co-worker found this post and let me know about it.I'm here to say this works perfectly for our STM32F7 development. Without this fix, we would would not have reliable SD Card support.Thank you so much for finding the issue and posting the fix!Add...
Posted on November 28, 2017 at 20:11 This solution worked for me. I found it on this forum: https://community.st.com/0D50X00009XkgffSAB Basically, just add ' __DSB();' just before the check when Tx Buffer is unavailable. @ https://communit...
Posted on November 21, 2017 at 02:59Did you find a solution to this problem? I have the same problem and don't want to waste too much time if you already know the answer. Thanks for sharing.