ESP32 SDCard OSError: 16 #10634
Description
Hi Community,
in the discussion #10581 the problem is explained. Also one solution was discussed there already.
Let me know if I can test a new idea to locate the problem.
Thank you!
Discussed in https://github.com/orgs/micropython/discussions/10581
Originally posted by engineertrooper January 24, 2023
Hi Community,
Problem:
I get an OSError: 16 if I use the example code V1.19.1 for the SDCard Class.
My Device:
- ESP32 Dev Kit C V2 or also sometimes named ESP32 NodeMCU Module
- with Micropython: v1.19.1 -> 2022-06-18
- Pins: sck=18, miso=19, mosi=23, cs=5 and 3,3V supply
Pre-Analyse
An OSError: 16 means a device or ressource is busy. Because of that I commented out all code with exception the following lines:
import os
import machine
sd = machine.SDCard(slot=2)
os.mount(sd, "/sd") # mount
os.listdir('/sd') # list directory contentsError-Msg (always the same, it doesn't matter if other code is commented out or not):
rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:2
load:0x3fff0030,len:4540
ho 0 tail 12 room 4
load:0x40078000,len:12344
ho 0 tail 12 room 4
load:0x40080400,len:4124
entry 0x40080680
Traceback (most recent call last):
File "main.py", line 62, in <module>
OSError: 16
MicroPython v1.19.1 on 2022-06-18; ESP32 module with ESP32
Type "help()" for more information.
>>>
Looking into the world wide web, github issues and other discussions
While I was reading I got the feeling that it has not something to do with the board directly. It looks like to me that the error is inside the ESP-IDF or there was a change in Micropython that was making that error existing?
After reading some Issues, Documentation, Discussions and Tutorials I marked down the following links:
*Note: tutorials excluded, because old solutions with a blob from @dpgeorge was used. But I found something similar of the blob here.
**Issue 429 and 8940 maybe not related to this question, but I'm not very fimilar to ESP-IDF, so added them just in case.
SD-Card Frequenz
One try was to set a frequenz. -> freq=20000000 as parameter inside SDCard(...)
I played with diffrent frequenzes between 100KHz and 20MHz, but didn't work. (See #8290 comment)
Note: I'm using a 32GB SanDisk Ultra MicroSdCard.
Question:
Any Idea how this OSError: 16 is coming up?
Or Do I oversee something simple here?