[Ovmsdev] SDCard speeds.

[Michael Balzer]

I think the actual max speed of the SPI host is 20 MHz, I never got 
anything higher to work. 20 MHz is my current config and works fine with 
all SD cards I tested.

Joshua Jung reported an issue with SD cards, that was resolved by a 
hardware replacement (I assume he meant replacing the module):
https://github.com/openvehicles/Open-Vehicle-Monitoring-System-3/issues/1107

So there may be a hardware issue with some modules.

Regards,
Michael


Am 23.03.25 um 04:52 schrieb Michael Geddes via OvmsDev:
> I while ago I was talking about issues with my SDCard, and I've just 
> had a friend have some similar issues. Both these issues were fixed 
> with setting the max frequency to 15MHz
> config set sdcard maxfreq.khz 15000
>
> This does end up making things a bit slower, but at least it works.  
> The reported max of my card is 25Mhz.  I'm concerned that the default 
> is misbehaving. Is this a software issue? or is it a hardware issue?
>
> //.ichael
>
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-- 
Michael Balzer * Am Rahmen 5 * D-58313 Herdecke
Fon 02330 9104094 * Handy 0176 20698926

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