User manual

27 GR-UT699 Development Board

User Manual

To perform software download and debugging on the processor, a link from the Host

computer to the DSU interface of the board is necessary. A connection to the DSU of the

board can be made using a USB cable (Type-A to Mini-AB connectors) from the Host PC to

the USB-DSU connector on the front panel.

Note, to use the USB-DSU interface you need to install the FTDI Virtual Com driver on the

Host PC. This driver allows the USB connection to the board to be used as a 'virtual' serial

port, operating at baud rates up to 460800 Baud.

These drivers can be downloaded from the FTDI web site, (www.ftdichip.com/FTDrivers.htm)

and drivers for both Linux and Windows are available. Information for the installation of

these drivers can be found on the FTDI web site

To perform program download and software debugging on the hardware it is necessary to

use the Gaisler Research GRMON debugging software, installed on a host PC (as

represented in Figure 2-8).

Note that it is necessary to use the 'PRO' version of GRMON, as the UT699 ASIC

incorporates FT features. It is not possible to use evaluation version of GRMON with this

ASIC. Please refer to the GRMON documentation for the installation of the software on the

host PC (Linux or Windows), and for the installation of the associated hardware dongle.

Starting GRMON, with the command:

grmon -i

will establish a link to the DSU, and will initialise the processor registers and timers.

The default serial interface used by GRMON is /dev/ttyS0 (linux) or com1 (Windows).

To use a different serial interface, specify the command

grmon -i -uart /dev/comXX (where XX is the number of the com port)

In the example shown in Figure 3-1 a connection is being made with GRMON over the USB-

Serial link, which in this instance is com63 on the host (Windows) PC.

The resulting response generated on the Host Computer is shown in Figure 3-1.

Typing the command flash will reported the detected Flash Prom memory configuration and

info sys will provide more information on the processors registers and internal cores as

shown in Figure 3-2.

Rather than using the Serial-DSU interface for debugging it is also fossible to instead use

the JTAG interface.

To connect via the JTAG_DSU interface using a Xilinx JTAG programming cable, start

GRMON with the command:

grmon -i -jtag -freq 66

(where '66' is is the clock frequency of the main processor oscillator).

Alternatively to connect via the JTAG_DSU interface using a Digilent HS-1 JTAG cable

(when running GRMON on MS-Windows), start GRMON with the command:

grmon -i -digilent

Program download and debugging can be performed in the usual manner. For more

information on the usage, commands and debugging features of GRMON, please refer to

the GRMON Users Manual and associated documentation.