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)
/*---------------------------------------------------------------------------- * U S B - K e r n e l *---------------------------------------------------------------------------- * Name: ADCUSER.C * Purpose: Audio Device Class Custom User Module * Version: V1.10 *---------------------------------------------------------------------------- * This software is supplied "AS IS" without any warranties, express, * implied or statutory, including but not limited to the implied * warranties of fitness for purpose, satisfactory quality and * noninfringement. Keil extends you a royalty-free right to reproduce * and distribute executable files created using this software for use * on NXP Semiconductors LPC family microcontroller devices only. Nothing * else gives you the right to use this software. * * Copyright (c) 2009 Keil - An ARM Company. All rights reserved. *---------------------------------------------------------------------------*/ #include "type.h" #include "usb.h" #include "audio.h" #include "usbcfg.h" #include "usbcore.h" #include "adcuser.h" #include "usbaudio.h" uint16_t VolCur = 0x0100; /* Volume Current Value */ const uint16_t VolMin = 0x0000; /* Volume Minimum Value */ const uint16_t VolMax = 0x0100; /* Volume Maximum Value */ const uint16_t VolRes = 0x0004; /* Volume Resolution */ /* * Audio Device Class Interface Get Request Callback * Called automatically on ADC Interface Get Request * Parameters: None (global SetupPacket and EP0Buf) * Return Value: TRUE - Success, FALSE - Error */ uint32_t ADC_IF_GetRequest (void) { /* Interface = SetupPacket.wIndex.WB.L; EntityID = SetupPacket.wIndex.WB.H; Request = SetupPacket.bRequest; Value = SetupPacket.wValue.W; ... */ if (SetupPacket.wIndex.W == 0x0200) { /* Feature Unit: Interface = 0, ID = 2 */ if (SetupPacket.wValue.WB.L == 0) { /* Master Channel */ switch (SetupPacket.wValue.WB.H) { case AUDIO_MUTE_CONTROL: switch (SetupPacket.bRequest) { case AUDIO_REQUEST_GET_CUR: EP0Buf[0] = Mute; return (TRUE); } break; case AUDIO_VOLUME_CONTROL: switch (SetupPacket.bRequest) { case AUDIO_REQUEST_GET_CUR: *((__packed uint16_t *)EP0Buf) = VolCur; return (TRUE); case AUDIO_REQUEST_GET_MIN: *((__packed uint16_t *)EP0Buf) = VolMin; return (TRUE); case AUDIO_REQUEST_GET_MAX: *((__packed uint16_t *)EP0Buf) = VolMax; return (TRUE); case AUDIO_REQUEST_GET_RES: *((__packed uint16_t *)EP0Buf) = VolRes; return (TRUE); } break; } } } return (FALSE); /* Not Supported */ } /* * Audio Device Class Interface Set Request Callback * Called automatically on ADC Interface Set Request * Parameters: None (global SetupPacket and EP0Buf) * Return Value: TRUE - Success, FALSE - Error */ uint32_t ADC_IF_SetRequest (void) { /* Interface = SetupPacket.wIndex.WB.L; EntityID = SetupPacket.wIndex.WB.H; Request = SetupPacket.bRequest; Value = SetupPacket.wValue.W; ... */ if (SetupPacket.wIndex.W == 0x0200) { /* Feature Unit: Interface = 0, ID = 2 */ if (SetupPacket.wValue.WB.L == 0) { /* Master Channel */ switch (SetupPacket.wValue.WB.H) { case AUDIO_MUTE_CONTROL: switch (SetupPacket.bRequest) { case AUDIO_REQUEST_SET_CUR: Mute = EP0Buf[0]; return (TRUE); } break; case AUDIO_VOLUME_CONTROL: switch (SetupPacket.bRequest) { case AUDIO_REQUEST_SET_CUR: VolCur = *((__packed uint16_t *)EP0Buf); return (TRUE); } break; } } } return (FALSE); /* Not Supported */ } /* * Audio Device Class EndPoint Get Request Callback * Called automatically on ADC EndPoint Get Request * Parameters: None (global SetupPacket and EP0Buf) * Return Value: TRUE - Success, FALSE - Error */ uint32_t ADC_EP_GetRequest (void) { /* EndPoint = SetupPacket.wIndex.WB.L; Request = SetupPacket.bRequest; Value = SetupPacket.wValue.W; ... */ return (FALSE); /* Not Supported */ } /* * Audio Device Class EndPoint Set Request Callback * Called automatically on ADC EndPoint Set Request * Parameters: None (global SetupPacket and EP0Buf) * Return Value: TRUE - Success, FALSE - Error */ uint32_t ADC_EP_SetRequest (void) { /* EndPoint = SetupPacket.wIndex.WB.L; Request = SetupPacket.bRequest; Value = SetupPacket.wValue.W; ... */ return (FALSE); /* Not Supported */ }
After searching the internet, the best I have come with is that, it could have something to do with usb.h and adcuser.c
in windows 7 every 50 to 80 us SYNC_RESET_PIPE_AND_CLEAR_STALL is being issued and failing causing lost packets and out of sequence audio packets
case URB_FUNCTION_SYNC_CLEAR_STALL and case case URB_FUNCTION_SYNC_RESET_PIPE. These allow client drivers to clear the ENDPOINT_HALT feature on the device, or reset the pipe on the host side, respectively, without affecting the data toggle on the host side. If the device does not reset the data toggle when it should, then the client driver can compensate for this defect by not resetting the host-side data toggle.
If the data toggle is reset on the host side but not on the device side, packets will get out of sequence, and the device might drop packets
???????