DTMF (Dual Tone Multi-Frequency) signal generation and detection 1, the program is divided into two parts, the first part for the DTMF generator, the second part for the DTMF detector. 2, DTMF with array in setting key length of the array 16, the range of 0 to 15, you can manually rewrite 3 array xr line generated frequency signal, the length of the 102,32-bit floating-point type array xc column frequency signal is generated, the length of 102,32-bit floating-point type array x is generated dual audio signal, the length of 102 points, the 32-bit floating-point type 4 array z as DTMF detection energy template, in order to complete the key the line position and column position detecting 6, variable outkeycol and, and variables outkeyrow key row position and the detection result of the position of the column, respectively, are integer variables variable outkey for ultimate keys detection result, the keys, and in this experiment introduced keyboard key corresponding character variabl

Exp14 DTMF\ad50.cmd
..........\Dtmf\cc_build_Debug.log
..........\....\Debug\dtmf.obj
..........\....\.....\Dtmf.out
..........\....\.....\initc5402.obj
..........\....\Debug.lkf
..........\....\Debug.lkv
..........\....\Dtmf.paf
..........\....\Dtmf.pjt
..........\Dtmf.c
..........\InitC5402.asm
..........\math.h
..........\MMRegs.h
..........\rts.lib
..........\TYPEDEF.H
..........\Dtmf\Debug
..........\Dtmf
Exp14 DTMF

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