> Also, is there any actual software that can use them through this driver? > The Altera 'quartus' software that is usually used to program (etc) the fpga is > pretty proprietary. > I think some bits have been reverse engineered, but only for a few simple > actions. Hi David, The software that mainly connect to this fdti driver are the debug or configuration software, includes Quartus programmer, System Console, SignalTap, Nios debugger etc. > > I'm not even sure the Altera code even loads a driver - just uses the userspace > USB library. No, those software are not loading the driver, it just access it from the ftdi_sio. > I'll have used it on a system with a custom kernel to program (etc) a CycloneV. > No hint of needing to recompile a driver. > (The sheer amount of software you need to command-line program a device is > stunning! - I had to parcel it all up so we could use a usb to jtag cable to in-situ > program one of the smaller PLD devices on a small board.) > > So what is the real 'use case'? Cyclone V should be an older family device, But for this use case it is to support mainly 2 use cases on the USB Blaster 3. 1) USB Blaster 3 cable 2) On Board USB Blaster 3. The hardware designers will decide, what kind of configuration needed on the board. We have total 8 types of configurations. 1) PID 0x6020, FT2232, 1 JTAG port 2) PID 0x6021, FT2232, 2 JTAG ports 3) PID 0x6022, FT2232, 1 JTAG port + Port B as UART 4) PID 0x6023, FT2232, Cable USB-Blaster 3 5) PID 0x6024, FT4232, 1 JTAG port 6) PID 0x6025, FT4232, 1 JTAG port + Port C as UART 7) PID 0x6026, FT4232, 1 JTAG port + Port C, D as UART 8) PID 0x602e, FT4232, 1 JTAG port + Port B, C, D as UART Regards Boon Khai
