USB3.0协议规范(中文).doc

USBHostSlave has been successfully compiled using Quartus 6.0 Note, that the component Builder in Quartus 6.0 will not accept include files, so you have to use Quartus to generate a single .vqm file, rename this as a .v file, and then import this using component Builder. USBHostSlave has been tested in a SystemC simulation, and on a Altera Nios development kit Cyclone edition. Release notes: // Version 0.6 - Feb 4th 2005. Fixed bit stuffing and de-stuffing. This version succesfully supports // control reads and writes to USB flash dongle // Version 0.7 - Feb 24th 2005. Added support for isochronous transfers, fixed resume, connect and disconnect // time outs, added low speed EOP keep alive. The TX bit rate is now controlled by // SIETransmitter, and takes account of the requirement that SOF, and PREAMBLE are always full // speed, and TX resume is always low speed. // Fixed read clock recovery (readUSBWireData.v) issue which was resulting // in missing receive packets. // Fixed broken SOF Sync mode (where transacations are synchronized with the SOF transmission) // by adding kludged delay to softranmit. This needs to be fixed properly. // This version has undergone limited testing // with full speed flash dongle, low speed keyboard, and a PC in full and low speed modes. // Version 0.8 - June 24th 2005. Added bus access to the host SOFTimer. This version has been tested // with uClinux, and is known to work with a full speed USB flash stick. // Moving Opencores project status from Beta to done. // Version 1.0 - October 14th 2005. Seperated the bus clock from the usb logic clock // Modified RX and TX fifo status registers, and removed TX fifo data count // register. Added RESET_CORE bit to HOST_SLAVE_CONTROL_REG. // Fixed slave mode bug which caused receive fifo to // be filled with incoming data when the slave was // responding with a NAK, and the data should have been discarded. // TODO: Test isochronous mode, and low speed mode using uClinux driver // Add frame period adjustment capability // Add compilation flags for slave only and host only versions // Create data bus width options beyond 8-bit // Version 1.1 - February 23rd 2006. Fixed bug related to 'noActivityTimeOut' // Previously the 'noActivityTimeOut' flag was repetitively pulsed whenever // there was no detected activity on the USB data lines. This caused an infrequent // misreporting of time out errors. 'noActivityTimeOut' is now only enabled when // the higher level state machines are actively looking for receive packets. // Modified USB RX data clock recovery, so that data is sampled during the middle // of a USB bit period. Fixed a bug which could result in double sampling // of USB RX data if clock phase adjustments were required in the middle of a // USB packet. // Version 1.2 - October 1st 2006. Small changes to .asf FSM's required // during migration to ActiveHDL 7.1. Released SystemC test bench. // Re-generated .v files using ActiveHDL 7.1 // Replaced individual timescale directives with `include "timescale.v // Renamed top level Altera wrapper from 'usbHostSlaveWrap' to // 'usbHostSlaveAvalonWrap' // Version 1.3 - March 22nd 2008. Fixed bug in 'readUSBWireData'. Added // synchronizer to incoming USB wire data to avoid // metastability, and delay hazards. Not entirely sure, but it appears that // this bug caused more problems with some of the newer low power FPGAs // Maybe because they are more prone to problems with metastable // inputs that feed logic functions causing excessive high speed // toggle activity, and disrupting nearby cicuits. // Version 2.0 - June 16th 2008. Added two new top level modules which // allow the instantiation of only host (usbHost.v), or only device // features. Added double sync stages between usbClk, and busClk domains // to fix possible metastability issues. Also modified synchronization to // allow operation with busClk frequency less than usbClk frequency (down to // 24MHz). Integrated full support for USB PHY. Prior to this modification // the user would need to instantiate a GPIO module to control USB speed, // D+ and D- pull-up control, and VBUS detect. Fixed bug in bus interface wb_ack. // Modified cross-clock synchronisation of fifo resets // Added usbDevice, a standalone usb device implementation of usbhostslave // no additional hardware or software required