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luc-github / ESP3D

FW for ESP8266/ESP8285/ESP32 used with 3D printer
GNU General Public License v3.0
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[Question] Switching between SPI and SDIO #823

Closed pagabee closed 2 years ago

pagabee commented 2 years ago

Hello

I read in a comment, it is recommended to use a switch to share the SD card. It is possible to switch between the SPI and the 4 bits SDIO protocol? I mean the 3D printer board would communicate with the SD card via SPI and the ESP3D (ESP32) via SDIO. The upload speed would be higher with SDIO but I don’t know if this kind of sharing would work or not.

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luc-github commented 2 years ago

what is your SD sharing solution ? does your printer sd reader is supporting SDIO communications ?

pagabee commented 2 years ago

I have an MKS Robin nano V3 board with MKS wifi, but I’m not very satisfied with the MKS Marlin firmware, because it has a lot of small bugs. The upload speed via MKS wifi is not so bad ~77kBs-100kBs, but it takes a many time to send a larger (~25MB) gcode file. Therefore I want to find a solution for faster file upload.

The board does not support the SDIO. My idea is shared SD with an additional board. SDIO communication with ESP32, SPI communication with the printer board. As switching component I would use FST3257, FST3245 or similar IC.

luc-github commented 2 years ago

We are talking about an esp8266 chip do not expect miracle, you may increase a little bit the upload but I do not think so much - did you tried what the upload speed would be sdcard card on esp8266 using arduino sample code https://github.com/esp8266/Arduino/tree/master/libraries/ESP8266WebServer/examples/FSBrowser ?

From esp3d point of view it should be transparent because ESP3D will only use SDCard in sdio when it control sdcard reader, so all should depend about your hardware switch, your SDCard reader, your sd card quality and your wiring.
But currently there is not SDIO support for esp8266...

pagabee commented 2 years ago

I checked the upload speed on a ESP8266 board, it is ~155kBs.