Tool/software:
Hi,
I´m developing a Raspberry PI CM4 with 5port USB hub.
I´ve tested wired keyboards and wired mouses - not working.....
Wireless keyboards, wireless mouses, USB WiFi dongles, USB sticks, printers are working OK....
I´ve tested wired keyboards and wired mouses - not working.....
Wireless keyboards, wireless mouses, USB WiFi dongles, USB sticks, printers are working OK....
it seems USB 2.0 devices work without any issues. But USB 1.0/1.1 devices do not work..
I´m using a self-powered mode and external 6MHz crystal oscillator. Ports 3 and 7 are not used and left floating.
I´m using a self-powered mode and external 6MHz crystal oscillator. Ports 3 and 7 are not used and left floating.
Downstream ports are connected to connector via 27ohm series resistors and using pull down 15k resistors on DM/DP pins to GND.
Upstream is connected directly to RPi Compute Module.
on the logs it displays:
[ 750.746001] usb 1-1.4: new low-speed USB device number 33 using dwc2 .
[ 750.746001] usb 1-1.4: new low-speed USB device number 33 using dwc2 .
[ 750.746001] usb 1-1.4: new low-speed USB device number 33 using dwc2 .
[ 751.187050] usb 1-1-port4: attempt power cycle
[ 751.845993] usb 1-1.4: new low-speed USB device number 34 using dwc2
[ 752.386004] usb 1-1.4: new low-speed USB device number 35 using dwc2
