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Programming the Papilio FPGA with a Circuit Design

This section describes how to a program the Papilio's FPGA with a Xilinx bitstream programming file (.bit file).

Prerequisites

  • A Papilio Pro development board and USB cable.

  • A Xilinx programming file (.bit), either generated using these instructions, or a pre-built one from the example projects.

  • A working copy of the papilio-prog tool including the FTDI USB device drivers (installation instructions here).

Steps

Note that each of the sample projects (except for the two microcontroller projects) can be loaded onto a Papilio Pro device using the make papilio target in the syn/ directory of the project. The steps below describe the process in detail for those who run into trouble with the Makefile or wish to better understand the process.

1. Connect the Papilio via USB

Physically attach the Papilio your computer using a USB cable.

If you're running Linux in virtualization, you may first need to add a USB port to your virtual machine. You will then need to grant the virtualized environment access to the device.

You can grep dmesg to verify the USB connection:

$ sudo dmesg | grep FTDI
[ 9715.868915] usb 2-1: Manufacturer: FTDI
[ 9715.920856] usbserial: USB Serial support registered for FTDI USB Serial Device
[ 9715.920886] ftdi_sio 2-1:1.0: FTDI USB Serial Device converter detected
[ 9715.923563] usb 2-1: FTDI USB Serial Device converter now attached to ttyUSB0
[ 9715.923599] ftdi_sio 2-1:1.1: FTDI USB Serial Device converter detected
[ 9715.927584] usb 2-1: FTDI USB Serial Device converter now attached to ttyUSB1
[ 9738.389022] ftdi_sio ttyUSB0: FTDI USB Serial Device converter now disconnected from ttyUSB0
[10364.012161] ftdi_sio ttyUSB1: FTDI USB Serial Device converter now disconnected from ttyUSB1

2. Verify the connection

You will need to run these commands as superuser. Use sudo su to create a root-privileged prompt, or preface commands with sudo.

Use the papilio-prog -j command to verify that the programmer can "talk" to the FPGA:

$ sudo papilio-prog -j
Using built-in device list
JTAG chainpos: 0 Device IDCODE = 0x24001093	Desc: XC6SLX9

An error like Could not access USB device 0403:6010. If this is linux then use sudo. indicates there is a problem with your USB connection. Verify that your machine sees the USB device and that you're running papilio-prog as superuser.

3. Locate the programming file

cd into the directory containing your programming file (.bit).

These can be found in the /papilio directory of the sample projects, or in the ISE project directory, if you used ISE to generate your own file.

4. Program the device

Program the FPGA using the papilio-prog -f <bitfile> command:

$ sudo papilio-prog -f loopback.bit
Using built-in device list
JTAG chainpos: 0 Device IDCODE = 0x24001093	Desc: XC6SLX9
Created from NCD file: loopback.ncd;UserID=0xFFFFFFFF
Target device: 6slx9tqg144
Created: 2017/03/25 13:31:51
Bitstream length: 2724832 bits

Uploading "loopback.bit". DNA is 0xf9f5ea92a61eb9ff

Upon completion, your hardware is ready to go! Do not power-cycle the device after programming it as the FPGA design configuration will be lost when the device is powered off.

To persist the design across power cycles, the Papilio Pro contains a small flash memory that can store your design and automatically load it on power-up. Use the -s a flag to erase, verify and program this flash:

$ sudo papilio-prog -s a -f loopback.bit