BitCfg3 is HuMANDA's original FPGA configuration application.
BitCfg3 can configure the FPGA through USB interface using FTDI Bit-bang mode.
The source code is available to the public.
How to work
Here is How-to operate the BitCfg.
BitCfg uses a bitstream file (***.bit for XILINX, ***.rbf for Altera). The device configuration mode are below.
| FPGA Vendor | Altera | XILINX |
|---|---|---|
| Config. mode | Passive Serial | Slave Serial |
| bitstream file format | rbf | bit |
BitCfg recognizes "FPGA vendor" by extension of bitstream file.
For more details, please see the opened source code.It is not long code,so would be easy to understand.
This table is pin assignment of FTDI FT2232H and FPGA.
| FT245 | FT232 | FT2232D | FT2232H | Direction | XILINX | Altera |
|---|---|---|---|---|---|---|
| Bit-Bang mode | ||||||
| Data0 | TXD | Data0(A/B) | BDBUS0 (D0) | OUT | CCLK | DCLK |
| Data1 | RXD | Data1(A/B) | BDBUS1 (D1) | OUT | PROG | nCONFIG |
| Data2 | RTS | Data2(A/B) | BDBUS2 (D2) | OUT | DIN | DATA0 |
| Data3 | CTS | Data3(A/B) | BDBUS3 (D3) | IN | DONE | CONF_DONE |
| Data4 | DTR | Data4(A/B) | BDBUS4 (D4) | -- | -- | |
| Data5 | DSR | Data5(A/B) | BDBUS5 (D5) | -- | -- | |
| Data6 | DCD | Data6(A/B) | BDBUS6 (D6) | -- | -- | |
| Data7 | RI | Data7(A/B) | BDBUS7 (D7) | -- | -- | |
The difference of configuration method between Altera and XILINX is bit transmit sequence.
When you send 0xAA, BitCfg send the data by 1010 1010 for XILINX, and by 0101 0101 for Altera.
After finishing transmit all data, you need to send extra CCLOK/DCLK until the FPGA starts its operation.
Application GUI.
Command line arguments.
BitCfg has three command line arguments.
(1) /D=
This argument sets FTDI chip's device description.
e.g. EDX-006) "/D=EDX-006 HuMANDATA B"
e.g. EDA-004) "/D=EDA-004 HuMANDATA B"
It means that you can use your original configuration hardware by setting this argument.
(2) /C=
e.g.) /C=1000000
This argument sets configuration rate.
BitCfg uses this value as parameter for FT_SetBaudRate(). So it is not CCLK /DCLK frequency.
(3) /F=
This argument sets the location of bitstream data used for FPGA configuration.
e.g. EDX-006) "/F=C:\ABC\DEF\conf_data.bit"
e.g. EDA-004) "/F=C:\ABC\DEF\conf_data.rbf"
If you set this argument, BitCfg starts configuration process immediately and ends its process.
Success termination code : 0
Error termination code : -1 (or others)
Please use the arguments in CAPITAL letter. They are not checked rigorously.
When you use the arguments, "/D=" is necessary.
BAT File Example
start BitCfg /D="EDX-006 HuMANDATA B" /C=1000000
exit
start BitCfg /D="EDX-006 HuMANDATA B" /C=1000000 /F="C:/AAA/BBB/test.bit"
exit
Download
You can download BitCfg here.
BitCfg3 is free software.
Please use it at your own risk.
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