QNX Neutrino Programmer's Guide [6.5.0 SP1] - QNX Software ...

© 2012, QNX Software Systems Limited Using libraries
• A PowerPC 800 FADS board and ELF boot prefix code are being used to boot.
• The image should contain devc-serppc800, the serial communications manager
for the PowerPC 80x family, as well as hello (our test program).
• devc-serppc800 should be started in the background (specified by the &
character). This manager will use a clock rate of 20 MHz, a baud rate of 9600, and
an smc1 device.
• Standard input, output, and error should be redirected to /dev/ser1 (via the
reopen command, which by default redirects to /dev/console, which we’ve
linked to /dev/ser1).
• Finally, our hello program should run.
Let’s assume that the above buildfile is called hello.bld. Using the mkifs utility,
you could then build an image by typing:
mkifs hello.bld hello.ifs
Step 2: Transfer the system image to the target.
You now have to transfer the image hello.ifs to the target system. If your target is a
PC, the most universal method of booting is to make a bootable floppy diskette.
If you’re developing on a platform that has TCP/IP networking and connectivity to
your target, you may be able to boot your Neutrino target system using a BOOTP
server. For details, see the “BOOTP section” in the Customizing IPL Programs chapter
in Building Embedded Systems.
If your development system is Neutrino, transfer your image to a floppy by issuing this
command:
dinit -f hello.ifs /dev/fd0
If your development system is Windows NT or Windows 95/98, transfer your image to
a floppy by issuing this command:
dinit -f hello.ifs a:
Step 3: Boot the target.
Using libraries
Place the floppy diskette into your target system and reboot your machine. The
message “Hello, world!” should appear on your screen.
When you’re developing code, you almost always make use of a library —a
collection of code modules that you or someone else has already developed (and
hopefully debugged). Under Neutrino, we have three different ways of using libraries:
June 14, 2012 Chapter 1 • Compiling and Debugging 11