High speed USB host mode ISO

Discussion created by lpcware Employee on Jun 15, 2016
Latest reply on Jun 15, 2016 by lpcware
Content originally posted in LPCWare by hannible on Mon Nov 24 02:22:58 MST 2014

I am using the NGX 1837 board and looking at the USB host mode implementation for high speed ISO transfer through Lpcusblib.
With reference to ehci.c, can someone help me to understand :

1.   When does the host start to send out IN transactions ?
2.   When does the DMA start ?

There is not much information from the hardware registers description also.