Gang! I'm running RAMPS 1.4 with an SD reader. I would like to be able to run g-code off a USB thumb drive rather than an SD CARD. Can the regular USB port on the Mega be used to read via the USB drive? I saw a module called: CH375B Module USB SPI interface Communication U-DISK Read Write For MCU DSP MPU [www.ebay.com] Do I even need this? Any Thoughts Thanks Max https://reprap.org/forum/read.php?13,250085,250085#msg-250085 Thu, 16 Jul 2026 01:32:50 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?13,250085,250803#msg-250803 https://reprap.org/forum/read.php?13,250085,250803#msg-250803
[dx.com]]]> Traumflug Controllers Wed, 02 Oct 2013 05:38:24 -0400 https://reprap.org/forum/read.php?13,250085,250675#msg-250675 https://reprap.org/forum/read.php?13,250085,250675#msg-250675 -------------------------------------------------------
> I was looking at hacking on a
> [url=http://www.ftdichip.com/Products/Modules/Appl
> icationModules.htm#VDrive2]VDrive1-PCB[/url] (now
> superseded with vdrive2)
>
> Its just a SPI or UART device that take simple
> serial commands.
>
> To me it looks very doable, but the firmware was
> beyond me...

Hey, good find! That is just the type device I was thinking of. I knew FTDI do some good stuff, I didn't realise they did that. I probably should, since I have actually got one of their USB host dev boards I had forgotten about :)

I will order a Vdrive2, and have a play with it. The VNC2 chip it is based is only a few pounds, I think I can put that onto to a small board and have it plug into a suitable connector.]]> bobc Controllers Tue, 01 Oct 2013 18:08:53 -0400 https://reprap.org/forum/read.php?13,250085,250382#msg-250382 https://reprap.org/forum/read.php?13,250085,250382#msg-250382 VDrive1-PCB (now superseded with vdrive2)

Its just a SPI or UART device that take simple serial commands.

To me it looks very doable, but the firmware was beyond me...]]> Dust Controllers Tue, 01 Oct 2013 06:32:02 -0400 https://reprap.org/forum/read.php?13,250085,250178#msg-250178 https://reprap.org/forum/read.php?13,250085,250178#msg-250178
OK, in theory you could build an external USB host to SPI bridge or similar, and I think there may even be shields to do things like that, but it is pretty unwieldy.

A lot of bigger micros have a combined device/host port (OTG) which could read a USB flash drive, with the right firmware. The Due has an OTG port for example.

Hopefully as we move towards ARM chips then it will be easier to support USB devices.]]> bobc Controllers Mon, 30 Sep 2013 15:23:31 -0400 https://reprap.org/forum/read.php?13,250085,250085#msg-250085 https://reprap.org/forum/read.php?13,250085,250085#msg-250085
I'm running RAMPS 1.4 with an SD reader. I would like to be able to run g-code off a USB thumb drive rather than an SD CARD. Can the regular USB port on the Mega be used to read via the USB drive?

I saw a module called:

CH375B Module USB SPI interface Communication U-DISK Read Write For MCU DSP MPU

[www.ebay.com]

Do I even need this?

Any Thoughts

Thanks

Max]]> disneytoy Controllers Mon, 30 Sep 2013 12:12:24 -0400