add calculate_speed_print for device_test

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1747 bbd45198-f89e-11dd-88c7-29a3b14d5316
This commit is contained in:
wuyangyong
2011-10-09 16:14:45 +00:00
parent b2f9217686
commit 7af3914228

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