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SNES Controller not detected #50
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hi, either one of the two controllers does not support USB-LS (may be limited to USB 2.0) or it's using a bad crystal and the esp32 can't compensate comparing the details of the two controllers will tell about their capabilities; you'll need a tool like lsusb can be installed using brew:
... or using port:
run it once without arguments to find the
then run lsusb with the VendorID/ProductID of that gamepad (e.g.
copy the results in a text editor, rinse and repeat with the other gamepad, then compare both results |
I report here the two output of lsusb, but they are very similar: The diff between working and not working controllers:
The full output of working controller:
The full output of not working controller:
|
according to this both controllers are USB 1.0
indeed some USB-LS devices with bad or no crystal can fail to be detected by ESP32-USB-Soft-Host, but this needs to be confirmed:
|
Unfortunately none of the first three things made a difference. I am available also to test with an oscilloscope but I do not know exactly what to test. Thanks a lot for your help anyway. |
you can verify that the bit rate / bit period are within the clock tolerance range (1.50±0.18 Mbit/s) in all 4 situations if you feel adventurous you can also use wireshark + logic analyzer to compare data between working and failing scenarios i.e. to identify where the fail happens (voltage, handshake, setup, data, crc) |
Thank you, I will check what I can do and see if I understand what is going on. |
This is a bit weird issue.
I spent some time developing a USB to DB9 (Commodore 64) controller using a SNES game pad.
Everything worked well and because of the 2 Commodore 64 ports I decided to buy a second SNES controller, but this second is not even detected.
Of course I thought that it could have been broken, but tested on a Mac it works perfectly. So I decided to open and inside the two controllers seems quite different. In particular the main difference that I can see is that one controller seems to have a crystal and the other not, but I can't see the chip used because it is under a black cap.
I am a bit stuck here because no message, appears on the console so it seems that the device is not detected in any way.
Is there something that I can do to debug this issue?
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