peter.m
Newbie level 4
Hi,
I'm trying to use xc3sprog with FT2232H. My chips are XC3S200 FPGA and XCF01S PROM. They are recognized and I can program them, but only when I have LPT<->JTAG programmer cable also connected. When this programmer is unplugged, chips are recognized but I can't program. I can only erase PROM. But the output of xc3sprog looks like all is done with success.
Here is how looks the connection of LPT<->JTAG cable header:
I suppose it provides some signal that FT2232H doesn't. FT2232H four JTAG lines are connected to JTAG pins of FPGA with serial 100 Ohm resistors.
EDIT:
Or maybe it is FT2232H issue. Because xc3sprog notifies:
Probably it can find FTD2XX, because I used FT2232H for USB transmission and had to install that driver. Should I install some other now?
Could you help with it?
I'm trying to use xc3sprog with FT2232H. My chips are XC3S200 FPGA and XCF01S PROM. They are recognized and I can program them, but only when I have LPT<->JTAG programmer cable also connected. When this programmer is unplugged, chips are recognized but I can't program. I can only erase PROM. But the output of xc3sprog looks like all is done with success.
Here is how looks the connection of LPT<->JTAG cable header:
I suppose it provides some signal that FT2232H doesn't. FT2232H four JTAG lines are connected to JTAG pins of FPGA with serial 100 Ohm resistors.
EDIT:
Or maybe it is FT2232H issue. Because xc3sprog notifies:
Code:
Libusb not found, expect failure
Could not open FTDI device (using libftdi): usb_find_busses() failed
Using FTD2XX.Could you help with it?
Last edited: