Figure 57. Playing the Broadcasting Music via PDA
Figure 57 presents the PDA plays the broadcasting music. The PDA
would play the broadcasting music when the ‘play’ button was pressed.
4-4 Summary
The system RAM of embedded system is 64MB in this thesis. The Linux kernel
and ramdisk (root file system) used 21 MB of system RAM when the embedded
system started, therefore the free system memory is 43MB. The system RAM usage
of other processes is shows as following tables:
Entrance System Processes Mem Used (KB) CPU Used (%)
Two-tier identification
210 < 0.1
Motion detection
30 < 0.1
Reading Images
6300 8
Displaying Images on Screen
1200 56
Auto Recording
250 60
SMS Sending
150 < 0.1
MySQL
11MB 12
Thttpd
2500 Depend on web pages
Webpage —PHP Simple WebCam
300 < 1
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