Subversion Repositories usbhostslave

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