lbernstone

I still need to test this on a couple different configs. I have a P4 dev board on the way.

I'll see if I can find some old cards around here and test an array of them. Not sure if I have really small & slow ones around any more.

> Weird is, that the SD card is not working on the P4-EYE board I got. Even with/without the changes in this PR. P4-eye (waveshare) has BOARD_SDMMC_POWER_PIN on 46

> Hmm these defines for sure would be a lot more clear with quite a bit more comments... [espressif/esp-idf@`8f1e7bc`/components/sdmmc/include/sd_protocol_types.h#L198-L205](https://github.com/espressif/esp-idf/blob/8f1e7bc4e08878f5a2aab55fdf302789d3a3eac4/components/sdmmc/include/sd_protocol_types.h#L198-L205) > > ```c++ > #define SDMMC_FREQ_DEFAULT 20000 /*!< SD/MMC Default speed...

Ok, the dev board I got doesn't break out the SDIO pins, so I still have no way to test the old (standard SD) cards I have. Does anybody have...

The thing that really needs to be tested is if this works on a device that is not capable of 1V8 operation.

It's not much faster in IDF. I am getting about 3.5MB/s in sequential read with UHS SDR. I get about 45MB/s with the same sdcard on my PC. ``` Name:...

Did some testing this morning. The allocation that fatfs is doing (sectors/cluster=32, sector/track=63, heads=255, sectors/FAT=30175) is about 25% slower than mkfs.fat (sectors/cluster=64, sector/track=16, heads=4, sectors/FAT=15104). When using exFAT, speed is...

The 32 in ESP32 means 32-bit. int is int32_t

There is no rust anywhere in arduino-esp32 and AFAIK in Arduino IDE. That must be coming from something you have added. Set compile debug output enabled in preferences and post...