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Cant set any data in SDMMC register on STM32L496VGT

Question asked by Luke Iliffe on Jan 19, 2018
Latest reply on Jan 19, 2018 by Luke Iliffe

Hello everyone,

           I have a really weird issue with running an SD card on a STM32L496VGT. I can't seem to set any bit in any SDMMC registers. I've tried hard setting a value using my debug tool with the code paused before it gets to the DMA initialization and I cant even do that. I have looked at the disassembly to make sure that actual assembly generated by my test code which is trying to write 3 to the clock divide factor  does nothing (images of code attached). Has anyone seen this before or have any ideas what might be going on.