(06-04-2021, 04:51 AM)dsimic Wrote: Sadly, I don't think that the RL2040 would be a good choice for a USB storage device... Here's a quotation from page 11 of the RP2040 datasheet:
Quote:A USB controller with embedded PHY can be used to provide FS/LS Host or Device connectivity under software control.
Full-speed (FS) USB 1.1, which runs at 12 Mbit/s, would be just too slow for a USB storage device.
Ah okay, was just an idea. I was wondering whether the PIO could be utilized to speed up USB... Just putting options out there
(06-04-2021, 11:33 PM)barray Wrote: Ah okay, was just an idea. I was wondering whether the PIO could be utilized to speed up USB... Just putting options out there
Quite frankly, I don't think that a bit-banging USB interface would go a long way.
(06-04-2021, 11:33 PM)barray Wrote: Ah okay, was just an idea. I was wondering whether the PIO could be utilized to speed up USB... Just putting options out there
Quite frankly, I don't think that a bit-banging USB interface would go a long way.
Okay... I was out shopping earlier and I saw they were selling a Pi Pico in the shop for just $6 - it seemed rude not to take it home with me I will do some tests on it when I get some spare time, perhaps on the weekend.
Other than that, my box with the 'Teensy' arrived, turns out the wrong thing was sent in the end... Will need to figure out how to source one from somewhere else.
(06-07-2021, 10:04 AM)barray Wrote: Okay... I was out shopping earlier and I saw they were selling a Pi Pico in the shop for just $6 - it seemed rude not to take it home with me I will do some tests on it when I get some spare time, perhaps on the weekend.
For $6 in a local store, it's definitely worth a try.
(06-07-2021, 10:04 AM)barray Wrote: Other than that, my box with the 'Teensy' arrived, turns out the wrong thing was sent in the end... Will need to figure out how to source one from somewhere else.
I'm sorry to hear that. I placed an order for a few Teensy 4.1 boards a few hours ago, from a German reseller website, and they've already dispatched the order; hopefully, the right boards will arrive. I've also managed to get a good friend of mine onboard the entire idea of making an open USB storage device; one of the boards is for him, and he's willing to do some testing down the road.
(06-11-2021, 04:15 AM)dsimic Wrote: For $6 in a local store, it's definitely worth a try.
I think so. The PIO could be quite interesting, I would love to see what the limits are. Worst case I will try to make something else out of it.
(06-11-2021, 04:15 AM)dsimic Wrote: I'm sorry to hear that. I placed an order for a few Teensy 4.1 boards a few hours ago, from a German reseller website, and they've already dispatched the order; hopefully, the right boards will arrive.
It happens, I thought there was some risk. I will try to locate another.
(06-11-2021, 04:15 AM)dsimic Wrote: I've also managed to get a good friend of mine onboard the entire idea of making an open USB storage device; one of the boards is for him, and he's willing to do some testing down the road.
Awesome! Is your friend a coder too? You should definitely bring them here to the forum
(06-11-2021, 04:15 AM)dsimic Wrote: I've also managed to get a good friend of mine onboard the entire idea of making an open USB storage device; one of the boards is for him, and he's willing to do some testing down the road.
Awesome! Is your friend a coder too? You should definitely bring them here to the forum
Yes, he is also a programmer with a lot of experience, but he isn't that much into the embedded development or into writing forum posts.
The Teensy 4.1 boards I've ordered arrived a couple of weeks ago, attached is a picture of them in person. In the meantime, I've been busy with debugging some U-Boot and ASoC issues on the PineBook Pro, which resulted in not much time being spent on making the Teensy 4.1 boards do something. However, that doesn't mean that the boards will become abandoned.
What I've accomplished so far is to get the TinyUSB's USB mass storage example compiled, although I haven't flashed it to a Teensy 4.1 yet.
07-08-2021, 09:21 PM (This post was last modified: 07-08-2021, 09:22 PM by barray.
Edit Reason: Misaligned quotes
)
(07-07-2021, 08:08 PM)dsimic Wrote: My apologies for the delayed response.
Also been slow myself. Very busy during these days, but I had realized I also hadn't messaged here in a while.
(07-07-2021, 08:08 PM)dsimic Wrote: Yes, he is also a programmer with a lot of experience, but he isn't that much into the embedded development or into writing forum posts.
Ah okay, well it would be good to communicate with your friend somehow at some point - especially if they are serious about helping with the project
(07-07-2021, 08:08 PM)dsimic Wrote: The Teensy 4.1 boards I've ordered arrived a couple of weeks ago, attached is a picture of them in person.
I haven't tried to get another Teensy board yet, the sources I went to originally have now dried up. I also haven't had much time to work on one in any case.
I still have the Pi Pico for now, which should be good enough for some initial experiments. I'm sure there will already be some dev effort in this space, so shouldn't entirely be from scratch.
(07-07-2021, 08:08 PM)dsimic Wrote: In the meantime, I've been busy with debugging some U-Boot and ASoC issues on the PineBook Pro, which resulted in not much time being spent on making the Teensy 4.1 boards do something. However, that doesn't mean that the boards will become abandoned.
Sounds fun! I've also had several unfortunate issues with my PineTab, so not particularly happy about that situation either. I'm currently looking to build my own laptop as I'm not particularly happy with the options out there.
(07-07-2021, 08:08 PM)dsimic Wrote: What I've accomplished so far is to get the TinyUSB's USB mass storage example compiled, although I haven't flashed it to a Teensy 4.1 yet.
That's excellent to hear. Please keep me up to date with how that goes and be sure to start putting stuff into a git repo if you're making changes.
(07-07-2021, 08:08 PM)dsimic Wrote: My apologies for the delayed response.
Also been slow myself. Very busy during these days, but I had realized I also hadn't messaged here in a while.
(07-07-2021, 08:08 PM)dsimic Wrote: Yes, he is also a programmer with a lot of experience, but he isn't that much into the embedded development or into writing forum posts.
Ah okay, well it would be good to communicate with your friend somehow at some point - especially if they are serious about helping with the project
(07-07-2021, 08:08 PM)dsimic Wrote: The Teensy 4.1 boards I've ordered arrived a couple of weeks ago, attached is a picture of them in person.
I haven't tried to get another Teensy board yet, the sources I went to originally have now dried up. I also haven't had much time to work on one in any case.
I still have the Pi Pico for now, which should be good enough for some initial experiments. I'm sure there will already be some dev effort in this space, so shouldn't entirely be from scratch.
(07-07-2021, 08:08 PM)dsimic Wrote: In the meantime, I've been busy with debugging some U-Boot and ASoC issues on the PineBook Pro, which resulted in not much time being spent on making the Teensy 4.1 boards do something. However, that doesn't mean that the boards will become abandoned.
Sounds fun! I've also had several unfortunate issues with my PineTab, so not particularly happy about that situation either. I'm currently looking to build my own laptop as I'm not particularly happy with the options out there.
(07-07-2021, 08:08 PM)dsimic Wrote: What I've accomplished so far is to get the TinyUSB's USB mass storage example compiled, although I haven't flashed it to a Teensy 4.1 yet.
That's excellent to hear. Please keep me up to date with how that goes and be sure to start putting stuff into a git repo if you're making changes.
I had a ATtiny85(cheap digispark board) connected to a SD card a few years ago as part of a badusb fake-keyboard and mass storage experiment. It wasn't fast but it worked. I was using the Arduino IDE so that fit even with micronucleus bootloader loaded on the attiny.
07-09-2021, 03:27 AM (This post was last modified: 07-09-2021, 03:28 AM by dsimic.
Edit Reason: Fixed a small typo
)
(07-08-2021, 09:21 PM)barray Wrote: Ah okay, well it would be good to communicate with your friend somehow at some point - especially if they are serious about helping with the project
Only time will tell how the things are going to work out.
(07-08-2021, 09:21 PM)barray Wrote: Sounds fun! I've also had several unfortunate issues with my PineTab, so not particularly happy about that situation either. I'm currently looking to build my own laptop as I'm not particularly happy with the options out there.
Here's another issue I've been working on, and the fixes have been accepted by Manjaro ARM. It was a small but rather nasty bug to flush out.
(07-08-2021, 09:21 PM)barray Wrote:
(07-07-2021, 08:08 PM)dsimic Wrote: What I've accomplished so far is to get the TinyUSB's USB mass storage example compiled, although I haven't flashed it to a Teensy 4.1 yet.
That's excellent to hear. Please keep me up to date with how that goes and be sure to start putting stuff into a git repo if you're making changes.
Of course, I'll keep you updated and I'll try to upstream any changes I might end up making.
(07-09-2021, 03:09 AM)biketool Wrote: I had a ATtiny85(cheap digispark board) connected to a SD card a few years ago as part of a badusb fake-keyboard and mass storage experiment. It wasn't fast but it worked. I was using the Arduino IDE so that fit even with micronucleus bootloader loaded on the attiny.
Good to hear! I assume that you used the SD card in 1-bit mode?
07-09-2021, 09:03 AM (This post was last modified: 07-09-2021, 09:15 AM by biketool.)
<snips above>
Good to hear! I assume that you used the SD card in 1-bit mode?
<Forum is getting wonky and not posting my reply just the upthread>
(try #3)
The devise was a Digispark with a i/o line to a dumb SD card holder PCB, so yes 1-bit. I never really thought about it but if speed were important there are more pins on the SD card, not sure how fast an attiny can go controlling and multiplexing a data line. I pasted together some example arduino code I found to do badUSB faux-USBkeyboard for some system updates and then save a log file to the SD. It didnt end up being used so it was never refined, I recall the data transfer as a flash drive was terrible though it was also a super cheap SD card <1GB.
But I would love to have a shot at a USB flash drive where I can play with the firmware and do stuff like goodUSB or even just a mouse wiggler for IM online status by moving a little dip switch or jumper.
I will do some tests on it when I get some spare time, perhaps on the weekend.
I placed an order for a few Teensy 4.1 boards a few hours ago, from a German reseller website, and they've already dispatched the order; hopefully, the right boards will arrive. I've also managed to get a good friend of mine onboard the entire idea of making an open USB storage device; one of the boards is for him, and he's willing to do some testing down the road. 
