Emerson PMPPC7448 user manual Monitor, Command-Linefeatures, Section

Section 11

Monitor

The PmPPC7448 monitor is based on the Universal Boot (U-Boot) program, available under the GNU General Public License (GPL). For instructions on how to obtain the source code for this GPL program, please visit http://www.emersonembeddedcomputing.com, send an e- mail to support@artesyncp.com, or call Emerson at 1-800-327-1251.

This chapter describes the monitor’s basic features, operation, and configuration sequences. This chapter also serves as a reference for the monitor commands and func- tions.

COMMAND-LINE FEATURES

The PmPPC7448 monitor uses a command-line interface with the following features:

Auto-Repeat:After entering a command, you can re-execute it simply by pressing the ENTER or RETURN key.

TFTP Boot: You can use the TFTP protocol to load application images via Ethernet into the

PmPPC7448’s memory.

Auto-Boot:You can store specific boot commands in the environment to be executed automatically after reset.

Flash Programming: You can write application images into Flash via the U-Boot command line. One megabyte at the base of Flash is reserved for the monitor.

At power-up or after a reset, the monitor runs diagnostics and reports the results in the start-up display, see Fig. 11-1. During the power-up sequence, the monitor configures the board according to the environment variables (see “Environment Variables” on

page 11-22)and settings in the Board Configuration registers (see “Board Configuration Registers” on page 7-6). If the configuration indicates that autoboot is enabled, the moni- tor attempts to load the application from the specified device. If the monitor is not config- ured for autoboot or a failure occurs during power-up, the monitor enters normal command-line mode.

10006757-02 PmPPC7448 User’s Manual

11-1