User manual

27 GR-LEON4-ITX Development Board

User Manual

3 SETTING UP AND USING THE BOARD

The default status of the Jumpers on the boards is as shown in Table 3-1.

For the meaning of the various jumpers, refer to Table 4-3 and RD 1.

Jumper Jumper Setting Comment

JP1 Installed 1-2 Connects 50MHz Main Oscillator for main CLK

J10 Installed 17-18 This inserts a pull-up on GPIO43 to enable USB-DCL on

power up.

JP11 Installed 1-2, 3-4, 5-6, 7-8

Table 3-1: Default Status of Jumpers/Switches

To operate the unit stand alone on the bench top, connect the +5V power supply to the

Power Socket J22 at the back of the unit.

The POWER LED should be illuminated indicating that the +3.3V power is active.

Upon power on, the Processor will start executing instructions beginning at the memory

location 0x00000000, which is the start of the PROM. If the PROM is 'empty' or no valid

program is installed, the first executed instruction will be invalid, and the processor will halt

with an ERROR condition, with the ERROR LED illuminated.

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 2-16). 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.

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

computer to the DSU interface of the board is necessary. As described in section 2.17 there

are four possible DSU interfaces available on this board:

SERIAL DSU Serial Debug Communication Link (connector J12)

JTAG-DCL JTAG Debug Communication Link (connector J19 or J20)

USB-DCL USB Debug Communication Link (connector J6)

EDCL Ethernet Debug Communication Link (connector J3)

Program download and debugging can be performed in the usual manner with GRMON.

More information on the usage, commands and debugging features of GRMON, is given in

the GRMON Users Manual and associated documentation. The GR-LEON4-ITX Quick Start

Guide contains more information and examples on using the board.