Application Programs and Systems - Heterogeneous Multicore Processor Technologies for Embedded Systems - page 201

mpeg2 osview xeyes power control manager

application

X server

OS SMP Linux

driver UART LAN ATA DU USB GPIO

Memory (DRAM)

hardware

CPU #3

CPU #0 CPU #1 CPU #2

Fig. 6.28 RP-2 application software architecture

Fig. 6.29 Display image of RP-2 application

interface (GUI) program implemented using the X toolkit of the X-window system.
A mouse is used as a pointing device. Figure 6.28 shows the software architecture of
the RP-2 application.
A display image of the application is shown in Fig. 6.29 . It consists of three win-
dows; they are those of the main application, system monitor, and “xeyes.”
Figure 6.30 shows the main application window, which has two parts. One is the
area to display both the MPEG-2 video and a histogram to show the current speed in
fps up to 40 fps. This area is an instance of a custom widget class of the X toolkit. The
contents of the “/dev/fb1” frame buffer device are mapped to this area. The other part