MicroPython SD Card Examole

[PeteHollyer]

I NEED a MICROPYTHON SD Card example for the Maker-Pi-Pico.
I have tried all the "current" examples on the internet I can find and NONE of them Work.
All of the Die on the "VfsFat" command

My SDCard and the Reader Work perfectly using CircuitPython, just NOT with MicroPython. I've tried formatting block size 512 & 1024 FS Fat32, Win 10 Formatter; Same error both times.

Code

import machine
import sdcard
import uos


cs = machine.Pin(15, machine.Pin.OUT)


spi = machine.SPI(1,
                  baudrate=1000000,
                  polarity=0,
                  phase=0,
                  bits=8,
                  firstbit=machine.SPI.MSB,
                  sck=machine.Pin(10),
                  mosi=machine.Pin(11),
                  miso=machine.Pin(12))

# Initialize SD card
sd = sdcard.SDCard(spi, cs)


vfs = vos.VfsFat(sd)                                          #<====   DIES HERE
uos.mount(vfs, "/sd")

with open("/sd/test01.txt", "w") as file:
    file.write("Hello, SD World!\r\n")
    file.write("This is a test\r\n")

# Open the file we just created and read from it
with open("/sd/test01.txt", "r") as file:
    data = file.read()
    print(data)

with following error

Traceback (most recent call last):
File "", line 23, in
File "sdcard.py", line 238, in readblocks
OSError: [Errno 5] EIO

Thx
Pete

[PeteHollyer]

I Tracked into the problem,

Micropython was NOT liking my SD card. Even though Circuitpython liked it.
I changed cards to a 32 GB card ( was a 2 BG Card) and it read.

from machine import Pin, SPI
import sdcard
import os
    
def OpenSD():
    sd_spi = SPI(1, sck = Pin(10, Pin.OUT), mosi = Pin(11, Pin.OUT), miso = Pin(12, Pin.OUT))
    # Create SDCard object
    sd = sdcard.SDCard(sd_spi, Pin(15, Pin.OUT))
    os.mount(sd, "/sd")
    os.listdir("/sd")
    print("Mounted")

def CloseSD():
    os.umount("/sd")
    print("UMount")

Problem was ALL mine! Sorry.
Please Close Issue

[designdevy]

hi can you share the circuitpython example that works with make pi pico? @PeteHollyer

[sgbaird]

I think you have a typo:
vfs = vos.VfsFat(sd) --> vfs = uos.VfsFat(sd)

Also, the script seems to be based mostly on https://www.digikey.com/en/maker/projects/raspberry-pi-pico-rp2040-sd-card-example-with-micropython-and-cc/e472c7f578734bfd96d437e68e670050.

[sgbaird]

@PeteHollyer did you ever figure out the formatting with your other card that wasn't working?

[PeteHollyer]

Yes I believe I Did.. Thanks Pete Sent from Mail for Windows From: Sterling G. Baird Sent: Thursday, November 3, 2022 12:01 AM To: CytronTechnologies/MAKER-PI-PICO Cc: Pete Hollyer; Mention Subject: Re: [CytronTechnologies/MAKER-PI-PICO] MicroPython SD Card Examole(#4) @PeteHollyer did you ever figure out the formatting with your other card that wasn't working? — Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you were mentioned.Message ID: ***@***.***>