real-time application with TMS320C5402 | TMS320C54x

Hi there, Is there any body who has any program, that can input some noise into the board (TMS320C5402)any noise (etc. white noice) and output the same noise (real time). Say to input the noise using a mic, and output the noise using a speaker. There is a file called audio.pjt in the TI folder, but i'm not very sure what kind of noise should be used as an input. The program is attacted below.Plz if possible let me kn how do i go about doing this task. Thankz /* * Copyright 2001 by Texas Instruments Incorporated. * All rights reserved. Property of Texas Instruments Incorporated. * Restricted rights to use, duplicate or disclose this code are * granted through contract. * U.S. Patent Nos. 5,283,900 5,392,448 */ /* "@(#) DSP/BIOS 4.51.0 05-23-01 (barracuda-i10)" */ /* * ======== audio.c ======== */ #include <std.h> #include <pip.h> #include <log.h> #include <trc.h> #include <hst.h> #include <string.h> /* memset() */ #include <stdarg.h> /* var arg stuff */ #include "dss.h" #include "audio.h" Int PHASE = 0; /* number of samples of phase difference */ static Uns allocBuf(PIP_Obj *out, Uns **buf); static Void freeBuf(PIP_Obj *out); static Uns getBuf(PIP_Obj *in, Uns **buf); static Void process(Uns *src, Int size, Uns *dst); static Void putBuf(PIP_Obj *out, Uns size); static Void writeBuf(PIP_Obj *out, Uns *buf, Uns size); static Int loadVal = 0; static PIP_Obj *hostPipe = NULL; /* * ======== main ======== */ Void main() { Int size; Uns *buf; #if AUDIO_USEHST hostPipe = HST_getpipe(&hostOutputProbe); #endif DSS_init(); /* Initialize codec and serial port */ LOG_printf(&trace, "Audio example started!!\n"); /* Prime output buffers with silence */ size = allocBuf(&DSS_txPipe, &buf); memset(buf, 0, size * sizeof (Uns)); putBuf(&DSS_txPipe, size); size = allocBuf(&DSS_txPipe, &buf); memset(buf, 0, size * sizeof (Uns)); putBuf(&DSS_txPipe, size - PHASE); /* Fall into BIOS idle loop */ return; } /* * ======== audio ======== */ Void audio(PIP_Obj *in, PIP_Obj *out) { Uns *src, *dst; Uns size; if (PIP_getReaderNumFrames(in) == 0 || PIP_getWriterNumFrames (out) == 0) { error("Error: audio signal falsely triggered!"); } /* get input data and allocate output buffer */ size = getBuf(in, &src); allocBuf(out, &dst); /* process input data in src to output buffer dst */ process(src, size, dst); /* check for real-time error */ if (DSS_error != 0) { LOG_printf(&trace, "Error: DSS missed real-time! (DSS_error = 0x%x)", DSS_error); loadVal -= 1; DSS_error = 0; } /* output data and free input buffer */ putBuf(out, size); freeBuf(in); } /* * ======== error ======== */ Void error(String msg, ...) { va_list va; va_start(va, msg); LOG_error(msg, va_arg(va, Arg)); /* write error message to sys log */ LOG_disable(LOG_D_system); /* stop system log */ for (;;) { ; /* loop for ever */ } } /* * ======== load ======== */ Void load(Int prd_ms) { static int oldLoad = 0; /* display confirmation of load changes */ if (oldLoad != loadVal ) { oldLoad = loadVal; LOG_printf(&trace, "load: new load = %d000 instructions every %d ms", loadVal, prd_ms); } if (loadVal) { AUDIO_load(loadVal); } } /* * ======== step ======== */ Void step(void) { static Int direction = 1; if (loadVal > MAXLOAD) { direction = -1; } if (loadVal <= 0) { direction = 1; } loadVal = loadVal + (100 * direction); } /* * ======== allocBuf ======== */ static Uns allocBuf(PIP_Obj *out, Uns **buf) { PIP_alloc(out); *buf = PIP_getWriterAddr(out);; return (PIP_getWriterSize(out)); } /* * ======== freeBuf ======== */ static Void freeBuf(PIP_Obj *out) { PIP_free(out); } /* * ======== getBuf ======== */ static Uns getBuf(PIP_Obj *in, Uns **buf) { PIP_get(in); *buf = PIP_getReaderAddr(in);; return (PIP_getReaderSize(in)); } /* * ======== process ======== */ static Void process(Uns *src, Int size, Uns *dst) { Int i; for (i = size - 1; i >= 0; i--) { dst[i] = src[i]; } /* if hostPipe is non-NULL write data to this pipe */ if (hostPipe != NULL) { writeBuf(hostPipe, dst, size); } } /* * ======== putBuf ======== */ static Void putBuf(PIP_Obj *out, Uns size) { PIP_setWriterSize(out, size); PIP_put(out); } /* * ======== writeBuf ======== */ static Void writeBuf(PIP_Obj *out, Uns *buf, Uns size) { Uns dstSize; Uns *dst; Int i; /* allocate outBuffer for output */ dstSize = allocBuf(out, &dst); /* copy data to output buffer (but not more than output buffer size) */ for (i = (dstSize >= size) ? size : dstSize; i > 0; i--) { *dst++ = *buf++; } /* put buffer to output pipe */ putBuf(out, size); }

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real-time application with TMS320C5402 - seth_singh - May 8 3:06:00 2004