Write to an A1-rated Micro SD card failed
#9
In our case most is solved , but one thing is strange..
We need half speed when writing card clock , but after that changing it back to full speed (50 Mhz atm) got it working.
AFAIK the clkdiv reg 0x0008 shouldn't have any effect without cardclock programmed, but from testing it has.

With our driver controller reports all speeds supported , but we are atm stuck with 3v3 signal voltage , and that means limit to 50Mhz.
The main driver needs modding for higher speed , and it would break OMAP port.. need to figure that out.

TBC.
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RE: Write to an A1-rated Micro SD card failed - by mgrunditz - 05-21-2021, 06:36 AM

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