[Unix_Linux]
signaltotheoperatingsystemtosolvetheprobla UNIX inter-process communication, the use of the signal operating system to solve the volume of consumers and producers, the use of the fork, wait, nanosleep, sempo other unix function.
[C/C++]
AT89C2051haveusedDTMFsignals.Rarwith 89c2051 simulation of DTMF signals, widely used in anti-theft alarm, telephone data transmission; Savings and resumption of the circuit, and low cost.
切换至中文 Over 1 million code package, 10 million code file free download 
