No Power To Mouse

[oXL0C0Xo]

Hoping that someone here can help me. When plugging in a USB optical mouse (IntelliMouse Optical USB, miscellaneous Dell, miscellaneous logitech mice), I haven't been able to get the laser on the mouse to light up no matter what I try.

I have tried different USB cables (about 15 of them), also powering the device via the 5v header straight from the power supply, nothing seems to get this mouse to light up.

I can access the serial configuration tool, so I know that it is connected. If I plug the mouse into my personal computer, it powers right up and I can use it, so I know that it is good.

I have used a max232, and the 5v bridge is in place. It should also be noted that cutemouse detects the mouse on the correct com port.

The strange thing is that this is the second adapter I have built, as I was having the same issue with the previously built one.

Any Ideas would be greatly appreciated. Thanks!

[sweetlilmre]

Have you soldered TP2 and TP3 on the board to the TP2/TP3 points on the Pico? I'm facing similar issues and trying to debug (I had the laser blinking, but only went stable after that, although the adapter is still not working). This closed issue has some detail: #1 

I have a pending PR to update the docs.

[oXL0C0Xo]

I had not done that, but I just tried it and it doesn't seem to make a difference

[oXL0C0Xo]

I should be able to just plug this into a USB brick on the wall, and when I plug my mouse in it should power up the mouse without needing to be connected to a computer via serial correct?

[sweetlilmre]

AFAIK yes, my mouse does power up. Maybe try another mouse if you have one available, and failing that I guess double check everything and use a meter to test voltages? Sorry I can't be more help. If I find something I'll ping back.

[LimeProgramming]

sounds like the data lines are getting a bit of abuse here.

I should really backport an update to this PCB to just say "use this port for power"
Try either getting a really cheap power cable, use a breakout board or carefully cut open the cable you're using to power the pico and cut the green and white wires.

this issue stems from my own equipment being painfully cheap at the time I was making this so the usb cable i used to power the pico didn't have data wires.

Sorry about that.

[oXL0C0Xo]

Curious though, because I am powering it from the 5v header on your PCB. Does it also require the pico to be powered independently?

[LimeProgramming]

power went out. hey.

ahh no powering the device with 5v via the header should be fine. not sure whats going on so. TinyUSB is a picky thing to deal with, have you tried tapping the reset button and all that?
unplugging and replugging the mouse will cause tinyusb to crash and it likes to crash in a way that I couldn't figure out how to catch and handle.

I haven't had compatibility issues with any mouse I've tried, even my logitech g502 worked fine, unless you have a very unusual mouse, it should be okay. if the tp1 and tp2 wires are soldering in correctly

[sweetlilmre]

Here I have 2 of 3 microsoft mice powering up but no activity. I cut open the USB cable only to confirm that it was indeed power only. I've shortened the tp1 and tp2 wires, still not working. I'll try another pico next to see if this is is a dud. 

Serial works and reports the mouse fine, so something is at least partially working.

[oXL0C0Xo]

I’m attaching some pictures of my unit. As far as I can tell, everything is where it should be. I did try resetting and replugging and every switch configuration, but the issue remains.

[oXL0C0Xo]

I am testing everywhere that I should have 5v, and I am getting it. I think that this must be a firmware issue, and it is just not initializing this mouse for some reason. The computer is detecting the mouse emulation, its the input that is not getting picked up by the PI. The mouse I am using is an "IntelliMouse Optical USB & PS/2 Compatible". If there is any more information that I can provide to help solve the issue, let me know.

[LimeProgramming]

I'm not sure here.
The soldering looks good, the length of the tp wires shouldn't matter too much because it's usb 1.1, in my own testing I had very long wires (maybe half a meter) and it still worked fine.

I have an MS basic usb mouse that I've tested on the device and it works fine. You're not using a hub are you? TinyUSB was really picky with hubs. I'd expect plugging and replugging to crash the device (blame tinyusb) If you want to try using a microusb OTG cable if you have one, plus the microusb into the pico and the mouse into the full sized usb port. The on board usb port is a more elaborate version of the same.

When the device has power and a serial connection it will present itself to the computer as a serial mouse and however if the usb mouse side isn't connected then it just won't report any data other than the type of mouse it is. the alrt light should light up when the usb mouse is connected and recognized properly.

Also the mouse "laser" should only turn on when tinyusb picks up that the mouse exists, there is a handshake performed before the mouse will light the laser. So the mouse can still get power and not light up. hmmm let me see if tinyusb has gotten an actually useful update.

[sweetlilmre]

I'm going to:

• recheck all the soldering (just reflowed some resistors that were possibly marginal)
• try another pico
• try some more mice
• possibly recompile the firmware and use the onboard LED to blink at strategic points so I can see where the code is.

Laser turns on for 2 of 3 mice tested, no ALRT LED activity so far.

[oXL0C0Xo]

Not using a USB hub, the mouse is plugged directly into the USB-2-232. I have never seen the ALRT light activate, nor the laser on my mouse ever turn on for even a second. I will see if I have an non-optical USB mouse to test also. Most of my USB mice are optical however, and all of them suffer the same issue. I really appreciate you looking into this!

[oXL0C0Xo]

Just tried a bunch of other USB mice, all optical unfortunately, none of them worked. Also tried some PS/2 ball mice with a PS/2 to USB adapter...still nothing. Could there be a difference between our PI picos that is causing the issue? mines got a 2020 date on it, and I see a 2.20 on the back side, not sure if that is a version or what. This has got to be an issue with the firmware not detecting the mouse. I wish i was a software guy so I could dig in.

Also just tried my Razer Deathadder from my main PC, nothing.

Forgot to mention that I did also try an OTG cable to connect the mouse directly into the PI and got the same results.

[LimeProgramming]

Okay, so I went to the codebase for what was supposed to replace this project, updated pico-sdk and tinyusb, it did get an update that seems promising. My absolute cheapest mouse goes unrecognized however my ms mouse and usb mini Amiga mouse work. I don't have an old PC handy to test if the serial side is working how it should (pin mapping is a little different but I think I remapped it correctly) but see if this firmware is at least picking up the mouse at all. The new codebase was ment to be backwards compatible with the older hardware so that should be fine.

usb-2-232-kbd.zip