Hello,
I am writing USB OTG from scratch for a Nucleo-f439zi.
Till now I have managed to make it reply to some Setup requests, to be more specific it replies to Device Descriptor and set Address , ( I am currently figuring out Configuration request which is the next usually).
I got some incosistencies where sometimes it will appear in task manager as Configuration Descriptor Request failed or Invalid Device Descriptor but other times it will appear as Device Descriptor Request failed and need some restarts to appear the Config Req Failed error again.
I got my hands on a USB sniffer and i am noticing some weird traffic.
No. Time Source Destination Protocol Length Info
58 2.495501983 host broadcast USBLL 3 SOF
59 2.496501983 host broadcast USBLL 3 SOF
60 2.497501983 host broadcast USBLL 3 SOF
61 2.498454316 host 0.0 USBLL 3 SETUP
62 2.498457566 host 0.0.0 USB 11 GET DESCRIPTOR Request DEVICE
63 2.498466233 0.0 host USBLL 1 ACK
64 2.498501983 host broadcast USBLL 3 SOF
65 2.498505233 host 0.0 USBLL 3 IN
66 2.498508483 USBLL 1 Invalid Packet ID (0xda)
67 2.498535900 host 0.0 USBLL 3 IN
68 2.498539233 USBLL 1 Invalid Packet ID (0xda)
69 2.498568233 host 0.0 USBLL 3 IN
70 2.498571566 USBLL 1 Invalid Packet ID (0xda)
71 2.498594483 host 0.0 USBLL 3 IN
72 2.498597733 USBLL 1 Invalid Packet ID (0xba)
73 2.498637483 host 0.0 USBLL 3 IN
74 2.498640816 USBLL 1 Invalid Packet ID (0xda)
75 2.498680483 host 0.0 USBLL 3 IN
76 2.498683816 USBLL 1 Invalid Packet ID (0xda)
77 2.498723483 host 0.0 USBLL 3 IN
78 2.498726733 USBLL 1 Invalid Packet ID (0xba)
79 2.498752650 host 0.0 USBLL 3 IN
What could be causing invalid packet ID error ?
I tried the HID example that ST provides and that error didn't appear once.
