Comments (2)
Sorry - that was premature. Turns out I wasn't using the microSD card I thought I was using. With the correct card (an SP 32GB "3D NAND" card) I'm now getting about 400us for an 8sector read operation and 550us for a 16 sector read. That's more like it!
from sdfat-beta.
16 sectors in 550us is pretty good.
You can't predict how cards will perform on a mpu like Teensy. They are designed for huge transfers in a high speed UHS mode with 1.8V signaling. Sometimes lower cost cards perform better.
from sdfat-beta.
Related Issues (20)
- hosting the documentation on a github.io page HOT 2
- SD card error with beta version HOT 7
- .h files in separate directories not found HOT 1
- PlatformIO compatibility HOT 1
- ESP32, Multiple cards, and Software Serial questions HOT 13
- SPI access to external SD Card other than normal SPI Pins (not soft spi) HOT 10
- lfnGetName might not properly null terminate callerstring HOT 7
- Moving cursor position with O_APPEND HOT 1
- Support for Multiple Partitions HOT 2
- FsVolume support partition? Also maybe memory leaks HOT 9
- Maybe support __has_include for configuration for sketch or library override of configuration. HOT 5
- Warning "'next' may be used uninitialized in this function" HOT 3
- Conflict between SdFat-beta library and USBFat library
- cannot open File with UTF-8 Name HOT 1
- Any attempt to have Web SD file Downloader
- ESP32 check sd format HOT 6
- SD Card hot swap HOT 1
- 'SdFat {aka class SdFs}' has no member named 'vwd' HOT 7
- Some SDCard Samples work others not ,SdFat Lib HOT 3
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