Hello,
What could be causing failed packets
Connection Status Device connected Current Configuration 1 Speed Full Device Address 1 Number Of Open Pipes 0 Device Descriptor NXP LPC17xx Speaker Offset Field Size Value Description 0 bLength 1 12h 1 bDescriptorType 1 01h Device 2 bcdUSB 2 0200h USB Spec 2.0 4 bDeviceClass 1 00h Class info in Ifc Descriptors 5 bDeviceSubClass 1 00h 6 bDeviceProtocol 1 00h 7 bMaxPacketSize0 1 40h 64 bytes 8 idVendor 2 1FC7h 10 idProduct 2 4005h 12 bcdDevice 2 0100h 1.00 14 iManufacturer 1 01h "NXP Semicond " 15 iProduct 1 02h "NXP LPC17xx Speaker " 16 iSerialNumber 1 03h "DEMO00000000" 17 bNumConfigurations 1 01h Configuration Descriptor 1 Bus Powered, 100 mA Offset Field Size Value Description 0 bLength 1 09h 1 bDescriptorType 1 02h Configuration 2 wTotalLength 2 0076h 4 bNumInterfaces 1 02h 5 bConfigurationValue 1 01h 6 iConfiguration 1 00h 7 bmAttributes 1 80h Bus Powered 4..0: Reserved ...00000 5: Remote Wakeup ..0..... No 6: Self Powered .0...... No, Bus Powered 7: Reserved (set to one) (bus-powered for 1.0) 1....... 8 bMaxPower 1 32h 100 mA Interface Descriptor 0/0 Audio, 0 Endpoints Offset Field Size Value Description 0 bLength 1 09h 1 bDescriptorType 1 04h Interface 2 bInterfaceNumber 1 00h 3 bAlternateSetting 1 00h 4 bNumEndpoints 1 00h 5 bInterfaceClass 1 01h Audio 6 bInterfaceSubClass 1 01h Audio Control 7 bInterfaceProtocol 1 00h 8 iInterface 1 00h Audio Control Interface Header Descriptor Offset Field Size Value Description 0 bLength 1 09h 1 bDescriptorType 1 24h Audio Control Interface Header 2 7 01 00 01 27 00 01 01 Audio Control Input Terminal Descriptor Offset Field Size Value Description 0 bLength 1 0Ch 1 bDescriptorType 1 24h Audio Control Input Terminal 2 10 02 01 01 01 00 01 00 00 00 00 Audio Control Feature Unit Descriptor Offset Field Size Value Description 0 bLength 1 09h 1 bDescriptorType 1 24h Audio Control Feature Unit 2 7 06 02 01 01 03 00 00 Audio Control Output Terminal Descriptor Offset Field Size Value Description 0 bLength 1 09h 1 bDescriptorType 1 24h Audio Control Output Terminal 2 7 03 03 01 03 00 02 00 Interface Descriptor 1/0 Audio, 0 Endpoints Offset Field Size Value Description 0 bLength 1 09h 1 bDescriptorType 1 04h Interface 2 bInterfaceNumber 1 01h 3 bAlternateSetting 1 00h 4 bNumEndpoints 1 00h 5 bInterfaceClass 1 01h Audio 6 bInterfaceSubClass 1 02h Audio Streaming 7 bInterfaceProtocol 1 00h 8 iInterface 1 00h Interface Descriptor 1/1 Audio, 2 Endpoints Offset Field Size Value Description 0 bLength 1 09h 1 bDescriptorType 1 04h Interface 2 bInterfaceNumber 1 01h 3 bAlternateSetting 1 01h 4 bNumEndpoints 1 02h 5 bInterfaceClass 1 01h Audio 6 bInterfaceSubClass 1 02h Audio Streaming 7 bInterfaceProtocol 1 00h 8 iInterface 1 00h Audio Streaming Interface Descriptor Offset Field Size Value Description 0 bLength 1 07h 1 bDescriptorType 1 24h Audio Streaming Interface 2 5 01 01 01 01 00 Audio Streaming Format Type Descriptor Offset Field Size Value Description 0 bLength 1 0Bh 1 bDescriptorType 1 24h Audio Streaming Format Type 2 9 02 01 01 02 10 01 40 1F 00 Endpoint Descriptor 03 3 Out, Isochronous, 1 ms Offset Field Size Value Description 0 bLength 1 09h 1 bDescriptorType 1 05h Endpoint 2 bEndpointAddress 1 03h 3 Out 3 bmAttributes 1 05h Isochronous, Asynchronous, Data 1..0: Transfer Type ......01 Isochronous 3..2: Sync Type ....01.. Asynchronous 5..4: Usage Type ..00.... Data 7..6: Reserved 00...... 4 wMaxPacketSize 2 0012h 18 bytes 6 bInterval 1 01h 1 ms 7 bRefresh 1 00h 8 bSynchAddress 1 83h Audio Streaming Isochronous Audio Data Endpoint Descriptor Offset Field Size Value Description 0 bLength 1 07h 1 bDescriptorType 1 25h Audio Streaming Isochronous Audio Data Endpoint 2 5 01 00 02 00 00 Endpoint Descriptor 83 3 In, Isochronous, 1 ms Offset Field Size Value Description 0 bLength 1 09h 1 bDescriptorType 1 05h Endpoint 2 bEndpointAddress 1 83h 3 In 3 bmAttributes 1 01h Isochronous, No Sync, Data 1..0: Transfer Type ......01 Isochronous 3..2: Sync Type ....00.. No Sync 5..4: Usage Type ..00.... Data 7..6: Reserved 00...... 4 wMaxPacketSize 2 0003h 3 bytes 6 bInterval 1 01h 1 ms 7 bRefresh 1 01h 8 bSynchAddress 1 00h
http://pastebin.com/gbdKGnwQ
URB 0006-0003 4:11:41.526 6.746 ms 71 us Sync Reset Pipe and Clear Stall 01:01:83 83DEC6F0h USBPDO-5 usbhub 84E65E00h Success (Success) URB 0007-0002 4:11:41.526 6.749 ms 88 us Sync Reset Pipe and Clear Stall 01:01:83 83DC8C80h 0000007a usbccgp 84E65E00h Success (Success) URB 0008 4:11:41.526 6.758 ms Isoch Transfer 3 bytes buffer in 01:01:83 83DC8C80h 0000007a usbccgp 84FD5790h URB 0009 4:11:41.526 6.763 ms Isoch Transfer 3 bytes buffer in 01:01:83 83DEC6F0h USBPDO-5 usbhub 84FD5790h URB 0010-0009 4:11:41.526 6.831 ms 69 us Isoch Transfer in 01:01:83 83DEC6F0h USBPDO-5 usbhub 84FD5790h Unsuccessful (Internal HC Error) URB 0011-0008 4:11:41.526 6.834 ms 77 us Isoch Transfer in 01:01:83 83DC8C80h 0000007a usbccgp 84FD5790h Unsuccessful (Internal HC Error) URB 0012 4:11:41.526 6.847 ms Sync Reset Pipe and Clear Stall 01:01:83 83DC8C80h 0000007a usbccgp 83DD4008h URB 0013 4:11:41.526 6.853 ms Sync Reset Pipe and Clear Stall 01:01:83 83DEC6F0h USBPDO-5 usbhub 83DD4008h URB 0014-0013 4:11:41.526 6.889 ms 36 us Sync Reset Pipe and Clear Stall 01:01:83 83DEC6F0h USBPDO-5 usbhub 83DD4008h Success (Success) URB 0015-0012 4:11:41.526 6.892 ms 45 us Sync Reset Pipe and Clear Stall 01:01:83 83DC8C80h 0000007a usbccgp 83DD4008h Success (Success)
Above sniffer trace is utterly weird. - The host repeats isoc IN transaction in short interval, less than 1ms - The host puts 160 bytes transaction to the isoc OUT EP, whereas this EP declares just 18 bytes wMaxPacketSize. And, the sampling rate on TypeI format is set to 8k
Maybe, your firmware has troubles in many places. You have changed too many portions of the code at a time on the original example. - Sampling rate (32k --> 8k) - Asynchronous with feedback EP Change the firmware one by one, with confirming the change result. Apply either one, first.
Tsuneo