Open Access
Programming the APB FPGA
9-6
ARM Development Board (ARM7TDMI Version)
Hardware Reference Guide
ARM DUI 0017C
9.3.3 Downloading a Configuration
To download a configuration:
1 Connect the XChecker download cable to a serial port on the host computer.
2 Connect the other end to the ARM Development Board (see
9.3.2 Connecting the
XChecker Cable
on page 9-5).
3 Send the bit file to the FPGA using the XChecker download cable by typing the
following command on the host machine:
xchecker filename.bit
4 Follow the on screen prompts. If the program returns an error, check the power
supply to the board and the integrity of the connectors.
When the download is successful the xchecker program reports:
DONE signal went high
and the LED marked “FPGA OK” lights up because it is connected to the FPGA DONE
signal.
9.3.4 Configuration Using a Serial PROM
When a design has been tested—usually using the download cable—the configuration can
be programmed into a PROM. A PROM inserted into the board initializes the FPGA on
power-up.
To generate a PROM data file suitable for programming a device, use the Xilinx makeprom
program. This is a graphical tool that allows PROM files to be generated in a variety of
formats.
1 Select the format (for example, MCS) and PROM size required.
2 Using the menus, load the bit file from address 0 upwards. This can then be saved
to disk.
3 Using a device programmer, load the PROM data file into memory. The serial
PROMs required are Xilinx parts XC17128D–PD8C. These are 5V devices in an 8-
pin DIL package.
Note
This part has a programmable reset polarity bit. Various device programmers
handle programming of this bit in different ways. Some manual intervention is
required to ensure that the device has active low reset polarity. When these bits
have been written to, the device can be programmed.
4 Program the PROM and insert it into the 8-pin DIL socket (U24) provided.
5 Ensure that the MODE[2:0] pins are connected using jumper sockets.
6 Power the board and observe the LED marked “FPGA OK”. If this LED does not
light up, power down the board and recheck.
hrg.book Page 6 Wednesday, July 22, 1998 9:18 AM
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