Pico - USB (host) in and (device) out 

Glad you like it :)

Sadly it doesn't work with the keyboard i got, it gets recognized but then the polling doesnt start, trying a ma3421E with arduino next.

I made a video on usb ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-fEDp9053eZs.html. also this is the first one you should probably watch. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-yIXa-6DRW-Y.html

Well in the main loop you can look for a given pin and toggle it high. If its helpful i have a simpler version of this, which is just a keyboard input. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-yIXa-6DRW-Y.html

I don't think you could do all of this. So you want to add a SD card like configuration file?

I'm glad you liked it so much. As for the view count, I don't have any cats or funny faces in my thumbnail. So that's why it's so low 😂

true :)

Poll rate? Is this poll rate related to a specific USB specification your trying to use. So it support USB FS, which is a 12 MHZ signal.

Totally you can do what ever you want basically. The call that send out the keyboard messages looks like this.

tud_hid_keyboard_report(REPORT_ID_KEYBOARD, 0, report);

here's what the report looks like. wiki.osdev.org/USB_Human_Interface_Devices#USB_keyboard

So basically you just want to look at the host keyboard usb report and modify that pass it into the device usb report

their is autohotintercelption which can do this and it can also distinguish between different keyboards.

Very similar. You just have to use the function process_mouse_report function like we did for the process_keyboard_report function. From there, their's example online that you can find that will tell you how to use usb mice's.

Sure, the PS2 doesn't use usb for its controller. It has some weird spi interface. Well maby it can use because there's a usb port on it can the rock band controllers work over usb?

@@brendenadamczak9283 if they can engineer ps2 to usb adapter you wouldn't think it would be I possible to transpose USB to SPI the same way.

@@tompaquette7138 If you use the pico to take in USB and output spi. This should be no problem. I made the above comment because this video shows you how to do usb in and usb out. Which i think you could do. It just might need some weird usb driver.

Not entirely sure? So it goes PIO_USB_code -> tinyUSB -> arduino driver -> [use it in your code]

So you would have to add PIO_code and add the arduino drivers for USB host and setup all the configurations for it. In the actual arduino build. At least thats my interpretation of it. I don't know if can access the low level pio code parts once your running the arduino software.

But i've only ever programmed a normal arduino. So my understanding could be completely off. Its been a long time since i've tried to program one and it was just for turning on little leds and stuff like that.

@@brendenadamczak9283 I did manage to get it working, but now I'm wondering if you have any tips for connecting two USB devices to the Pico at once? Like both a mouse and keyboard. I can get them both to properly send the HID codes when connected separately, but I'm not sure how to do both simultaneously. I have attempted to create two TinyUSB host instances, each with their own pio_config with the respective D+ pin, but only the first device works in that instance.

@@kennyhubbell813 So it sounds like your trying to connect two usb devices from two different usb connections. Is that true? So i made a devices that would take two usb devices that were connected to a usb hub. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-ATGZD2AyFkc.html. Code here github.com/brendena/USB_to_PS2_pico

If your looking for a more in-depth video on USB keyboard host you can watch this. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-yIXa-6DRW-Y.html

Yes this sets the pins value PIO_USB_CONFIG. github.com/brendena/pico_device_and_host/blob/main/main_host.c

@@brendenadamczak9283How does that work? It only defines one pin and I tracked it down to: hcd_configure( which leads to some application of a struct that I have yet to track down. Is the pin it provides(1?) data + or - is the second pin 2 or 0? Am I even on the right track did I interpret this DP correctly as "Data Pin"?

@@fgregerfeaxcwfeffece It's been a a long time since i looked at this code, But i'm guessing if you replaced PIO_USB_TX_DEFAULT, with a another gpio it will probably work

@@brendenadamczak9283Okay, that would have taken a LOT of experimentation. Since I assumed that to be some setting for the com interface you are using additionally. As from my understand USB Data+/- is not transmit (TX) and receive (RX) but just Data and the same data inverted. So labeling one of those as TX seems let's say "counterintuitive". What is your wiring? Which GPIO is Data+ and which is Data -?

@@fgregerfeaxcwfeffece So this was just taken from the project that made the driver for PIO USB. github.com/sekigon-gonnoc/Pico-PIO-USB/blob/0f747aaa0c16f750bdfa2ba37ec25d6c8e1bc117/src/pio_usb_configuration.h#L38C9-L38C31

So if you look inside "Pico-usb-pio" do you see anything? If not do this "git submodule init" then "git submodule update". Then you should see files in there. Hopefully it builds after that. If that was your problem thats my bad and i updated the docs. If not just message me and i'll try again :)

@@brendenadamczak9283 [driver] Build completed: 00:01:30.302 [build] Build finished with exit code 0 done , instead of using cmd , i downloaded code form git as zip and tried to compile thanks

Probably? So the pico has a wifi board if that makes it easier for you? Then you potentially wouldn't need this PCB board? But to the original question yes. From you pcb you can talk to the pico over the same cable that powers it. You'll want to use the CMC class, which is basically a uart stream of data.

@@brendenadamczak9283 actually i'm using a device stm32 as USB CDC it's the same ?

@@mealshake4284 So this is how it sounds to me [STM32 PCB ] (USB Host) -> (USB Client)[Pico](WIFI) -> (WIFI) [PC]

If thats the case it should work no problem. The pico is just acting as a relay at that pont. Put a little ZMQ server on the pico and your all set to talk to your pc

@@brendenadamczak9283 exactly, my stm32 works as a device

I've never done it. But the first step would be to set the flag for vender specific. github.com/hathach/tinyusb/blob/master/examples/host/hid_controller/src/tusb_config.h#L108

It should look like a much simpler version of the keyboard host example. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-yIXa-6DRW-Y.html. Here are the calls github.com/hathach/tinyusb/blob/master/src/class/vendor/vendor_host.h

Just to make sure what are you trying to interface too? Are you sure its a vender specific device?

So by output are you meaning devices? Currently tiny usb doesn't support having more then 1 device or host.

@@brendenadamczak9283 my problem is my puco is showing his firmware I dont want to show that so thier is any possible way to.fix this problem ??

@@MineOrebaker Can you describe the problem again?

Well this won't totally help you, but the next video i'm working on is midi usb host on the raspberry pi pico. It might help you out some way.

@@brendenadamczak9283 Trying this too! Cant get it to work unfortunately. I have a Launchpad and I want to use it Standalone with the Pico as the Host. Looking forward to the next video!