Micro SD Card

[Raed]

Hello All
This is my first post on the forum and hope, any one used machine.SDCard on ESP32-WROOM-32 board, I am using OLIMEX ESP32-EVB, and not getting anywhere.

Regards

[Roberthh]

You have to use the proper GPIO pins. Looking at the schematics of the board, a mount script could be something like:

Code: Select all

import machine, sdcard, os
sd = sdcard.SDCard(machine.SPI(1, sck=machine.Pin(6), mosi=machine.Pin(11),
                   miso=machine.Pin(7)), machine.Pin(10))
os.mount(sd, "/sd")
os.listdir("/sd")

[Raed]

Dear Roberthh
I checked my board, it is in compliance with machine.SDCard slot=1 width=4.

Please see http://docs.micropython.org/en/latest/l ... DCard.html

Regards

[Roberthh]

So it works? Comparing the documentation and the schematics on the net, it looks more like slot=0, width=4.

[Raed]

I found this https://github.com/espressif/arduino-esp32/issues/495

seems not only me suffering, if you look closer there is a miss match, on the module they names slot 0 pins, but on the SDMMC part of the schematic they only wired D0 of slot 1.

Seems the schematic provided is not the one used to make the pcb

So I must try slot=1, width=1 but I am on a busness trip now I will try and update later.

I am doing a PCB for slot=1, width=4 once I get I will also post the results

[Raed]

Hi
I made the PCB, and I am getting the following, any idea???

>>> import uos
>>> import machine
>>> uos.mount(machine.SDCard(slot=1,width=4), "/sd")
[0;32mI (31850) gpio: GPIO[13]| InputEn: 0| OutputEn: 1| OpenDrain: 0| Pullup: 0| Pulldown: 0| Intr:0 [0m
[0;31mE (31850) sdmmc_io: sdmmc_io_reset: unexpected return: 0x108[0m
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
OSError: 16
>>>

[Dash]

I have a similar issue
https://github.com/Xinyuan-LilyGO/LilyG ... 2/issues/9

Appearently the pin they say is connected to the as card doesn’t exist it’s the IO14
You can even see it on theire github page.linked below
Can anyone check the schematic and tell me if they see all the pins?


https://github.com/Xinyuan-LilyGO/LilyG ... 2/issues/9