The config looks ok, no problems there.

First, if you absolutely need the performance and have the pins to spare, I suggest you switch to 4 bit sdio it should 2x to 3x the speed. If you cannot/do not want to, try using SPI instead to see if anything changes.

Still, 150KB/s is really slow, with a ...

Hey, I've tried your suggestions as well as something else, but still this behaveour persists.

About interrupts. Ive tried portENTER_CRITICAL, taskENTER_CRITICAL_FROM_ISR and taskENTER_CRITICAL. All of them provoke a core panic as soon as f_read is called. Ive seen some people suggesting that FatFS ...

Hey everyone!

In a recent proyect ive found myself having to really optimize read speeds from an sdcard and have encountered a weird behaveour I just cant fix or even explain.
Introducing the issue, im trying to reproduce GIFs directly from an SD card. So, using the SDMMC driver Ive mounted the ...