PC Access to SD Card?

Status
Not open for further replies.
C

cebersp

Well-known member
Hi,
in a project I have running Teensy 4.1 with the internal SD-card 64GB and SDFat with ExFat.
Now I want to build the T4.1 into an enclosure. It is difficult to have USB AND SD-card accessible from outside. So I come to the question:

How can I access an SD-Card via USB from a Windows PC and do binary file transfers? For example *.WAV Files.

YMODEM would be nice perhaps?
Has anybody got Z-Modem running with USB-serial? https://forum.pjrc.com/threads/26646-Zmodem-transfer-from-Teensy-to-PC/page2?highlight=zmodem

I have seen this about RawHid, but it is not very encouraging for me: https://forum.pjrc.com/threads/67541-Serial-File-Transfer?highlight=zmodem

Thanks for some hints!
Christof
 
Thanks, yes this sounds like a future dream... Meanwhile I was looking for something very much simpler.

Minimum would be, that Teensy is controlling this and sends a file with known file name but unknown length.
 
Last edited:
cebersp said:
Thanks, yes this sounds like a future dream... Meanwhile I was looking for something very much simpler.

Minimum would be, that Teensy is controlling this and sends a file with known file name but unknown length.
Click to expand...

It is simply and working since years
the following is still working
https://github.com/WMXZ-EU/MTP_t4
you can also use @KurtE's fork, but he should advice on stable version

you can use mtp-basic example to see usage for nearly all Teensy filesystems
 
WMXZ said:
It is simply and working since years
the following is still working
https://github.com/WMXZ-EU/MTP_t4
you can also use @KurtE's fork, but he should advice on stable version

you can use mtp-basic example to see usage for nearly all Teensy filesystems
Click to expand...

Thanks a lot for pointing me at this! I will try it. Sometimes it is hard to find things. Silly me had to google "MTP"....

Edit: Needs modifications of cores. Hm.
 
cebersp said:
Edit: Needs modifications of cores. Hm.
Click to expand...

Only if you wanted MTP + Serial
MTP + Seremu does NOT need mods to cores
BTW, I do it for all new TD Versions.
It does not change cores behaviour, only adds functionality

A PR to Paul's cores GitHub is only useful when Paul decides on a dedicated PID for MTP+Serial
So, we are still waiting, but SW is here in use for multiple years for both T3.6 and T4.1.
 
BriComp said:
Any Code available?
Click to expand...

Hm, wondering if you need it for yourself or if you are just kind of trying to educate me in this nice way?
I posted the link, if you have problems with it, just describe them in a more elaborate way.
There is more fun in these forums, when people are friendly.
Good day to you!
 
cebersp said:
Hm, wondering if you need it for yourself or if you are just kind of trying to educate me in this nice way?
I posted the link, if you have problems with it, just describe them in a more elaborate way.
There is more fun in these forums, when people are friendly.
Good day to you!
Click to expand...

@BriComp is generally a helpful and friendly type.
Seemed the ask was for Teensy code using the linked library to repro the efforts and success of YModem Teensy==>PC file transfer.
 
Status
Not open for further replies.
Back
Top