ft2232h_de10lite

FT2232H + DE10-Lite example

Hardware

Compilation

Quartus 19.1.0 Lite is used.

Simply run ./create_proj.sh to create the Quartus project from the tcl file.

Syncronous vs Asynchronous FT245

By default, synchronous mode is enabled. To switch to asynchronous just comment the define FIFO245_SYNC in top.sv file.

//------------------------------------------------------------------------------
// FT245 protocol master
//------------------------------------------------------------------------------
//`define FIFO245_SYNC

`ifdef FIFO245_SYNC
    `include "sync245.svh"
`else
    `include "async245.svh"
`endif

Connections

All the connections are below.

FT Pin	FT Function	GPIO J1 Header	RTL Top
ADBUS0	D0	gpio[8]	ft_data[0]
ADBUS1	D1	gpio[10]	ft_data[1]
ADBUS2	D2	gpio[12]	ft_data[2]
ADBUS3	D3	gpio[14]	ft_data[3]
ADBUS4	D4	gpio[16]	ft_data[4]
ADBUS5	D5	gpio[18]	ft_data[5]
ADBUS6	D6	gpio[20]	ft_data[6]
ADBUS7	D7	gpio[22]	ft_data[7]
ACBUS0	RXF#	gpio[24]	ft_rxfn
ACBUS1	TXE#	gpio[26]	ft_txen
ACBUS2	RD#	gpio[28]	ft_rdn
ACBUS3	WR#	gpio[30]	ft_wrn
ACBUS4	SIWU	gpio[32]	ft_siwu
ACBUS5	CLKOUT	gpio[2]	ft_clk
ACBUS6	OE#	gpio[34]	ft_oen

Software

System:

• Ubuntu 20.04
• Python 3.7

All tests evaluate read and write throughtput.

test_ftd2xx.py

Requirements:

• D2xx Driver
• ftd2xx

Results (synchronous 245):

$ ./test_ftd2xx.py
Read 100.00 MiB (104857600 bytes) from FPGA in 10.846953 seconds (9.22 MiB/s)
Verify data: ok
Wrote 100.00 MiB (104857600 bytes) to FPGA in 2.632750 seconds (37.98 MiB/s)
Verify data: ok

Note - known issue with sync fifo speed under linux.

test_pylibftdi.py

Requirements:

• pylibftdi
• libftdi

Results (synchronous 245):

$ ./test_pylibftdi.py
Read 100.00 MiB (104857600 bytes) from FPGA in 2.705440 seconds (36.96 MiB/s)
Verify data: ok
Wrote 100.00 MiB (104857600 bytes) to FPGA in 2.717165 seconds (36.80 MiB/s)
Verify data: ok

test_ftdi1.py

Requirements:

• pylibftdi
• ftdi1 - SWIG wrapper (check python folder in libftdi sources root)

Results (synchronous 245):

$ ./test_ftdi1.py
Read 100.00 MiB (104857600 bytes) from FPGA in 2.422061 seconds (41.29 MiB/s)
Verify data: ok
Wrote 100.00 MiB (104857600 bytes) to FPGA in 2.342588 seconds (42.69 MiB/s)
Verify data: ok

test_pyusb.py

Requirements:

• pyusb

Results (synchronous 245):

$ ./test_ftdi1.py
Read 100.00 MiB (104857600 bytes) from FPGA in 2.422061 seconds (41.29 MiB/s)
Verify data: ok
Wrote 100.00 MiB (104857600 bytes) to FPGA in 2.342588 seconds (42.69 MiB/s)
Verify data: ok