📄 v34trans.c
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/*
* V34trans A SIMULINK example for v34 transmission
*
* Syntax: [sys, x0] = v34trans(t,x,u,flag,rate,ShMp)
*
* rate is a 12 element vector, which contains:
* rate = [rate_s, rate_r, rate_s_j, rate_s_p, rate_s_n,
* rate_b, rate_q, rate_K, rate_M, rate_M_exp,
* rate_L, rate_L_exp];
* see V34param for the details of the rate parameter.
*
* ShMp is a four column matrix
* ShMp(:, 1) contains g2
* ShMp(:, 2) contains g4
* ShMp(:, 3) contains g8
* ShMp(:, 4) contains z8
*
* Wes Wang Jan. 24, 1996
* Copyright (c) 1996 by The MathWorks, Inc.
* All Rights Reserved
* $Revision: 1.3 $ $Date: 1996/04/10 20:20:38 $
*/
#define S_FUNCTION_NAME v34trans
#ifdef MATLAB_MEX_FILE
#include <stdio.h> /* needed for declaration of sprintf */
#include "mex.h" /* needed for declaration of mexErrMsgTxt */
#endif
#include "simstruc.h"
/* Defines for easy access of the input parameters */
#define NUM_ARGS 2
#define RATE ssGetArg(S,0)
#define ShMp ssGetArg(S,1)
/*
* mdlInitializeSizes - called to initialize the sizes array stored in
* the SimStruct. The sizes array defines the
* characteristics (number of inputs, outputs,
* states, etc.) of the S-Function.
*/
static void mdlInitializeSizes(S)
SimStruct *S;
{
int rate_s = (int) mxGetPr(RATE)[0];
int rate_r = (int) mxGetPr(RATE)[1];
int rate_j = (int) mxGetPr(RATE)[2];
int rate_p = (int) mxGetPr(RATE)[3];
int rate_b = (int) mxGetPr(RATE)[5];
int rate_q = (int) mxGetPr(RATE)[6];
int rate_K = (int) mxGetPr(RATE)[7];
int rate_M = (int) mxGetPr(RATE)[8];
/*
* Set-up size information.
*/
/*
#ifdef MATLAB_MEX_FILE
if (0) {
char err_msg[256];
sprintf(err_msg, "Size initial, rate_s = %d; rate_r = %d; rate_j = %d; rate_p = %d;\n", rate_s, rate_r, rate_j, rate_p);
mexPrintf(err_msg);
sprintf(err_msg, "rate_b = %d; rate_q = %d; rate_K = %d; rate_M = %d;\n", rate_b, rate_q, rate_K, rate_M);
mexPrintf(err_msg);
sprintf(err_msg, "ShMp_N= %d, ShMp_M=%d;\n", mxGetN(ShMp), mxGetM(ShMp));
mexPrintf(err_msg);
}
#endif
*/
if (ssGetNumArgs(S) == NUM_ARGS) {
ssSetNumContStates( S, 0);
ssSetNumDiscStates( S, 0);
ssSetNumInputs( S, rate_b+2);
ssSetNumOutputs( S, rate_q + 1 + 3);
ssSetDirectFeedThrough(S, 1);
ssSetNumInputArgs( S, NUM_ARGS);
ssSetNumSampleTimes( S, 1);
ssSetNumRWork( S, 0);
/* 1 last updata
* 1 last trigger output
* 1 current output counter
* 23 scramble
* 8 mijk number
* scrambled b input data
*/
ssSetNumIWork( S, 1 + 1 + 1 + 23 + 8 + rate_b);
ssSetNumPWork( S, 0);
} else {
#ifdef MATLAB_MEX_FILE
char err_msg[256];
sprintf(err_msg, "Wrong number of input arguments passed to S-function MEX-file.\n"
"%d input arguments were passed in when expecting %d input arguments.\n", ssGetNumArgs(S) + 4, NUM_ARGS + 4);
mexErrMsgTxt(err_msg);
#endif
}
}
/*
* mdlInitializeSampleTimes - initializes the array of sample times stored in
* the SimStruct associated with this S-Function.
*/
static void mdlInitializeSampleTimes(S)
SimStruct *S;
{
/*
* Note, blocks that are continuous in nature should have a single
* sample time of 0.0.
*/
ssSetSampleTimeEvent(S, 0, 0.0);
ssSetOffsetTimeEvent(S, 0, 0.0);
}
/*
* mdlInitializeConditions - initializes the states for the S-Function
*/
static void mdlInitializeConditions(x0, S)
double *x0;
SimStruct *S;
{
int rate_s = (int) mxGetPr(RATE)[0];
int rate_r = (int) mxGetPr(RATE)[1];
int rate_j = (int) mxGetPr(RATE)[2];
int rate_p = (int) mxGetPr(RATE)[3];
int rate_b = (int) mxGetPr(RATE)[5];
int rate_q = (int) mxGetPr(RATE)[6];
int rate_K = (int) mxGetPr(RATE)[7];
int rate_M = (int) mxGetPr(RATE)[8];
int *last_updata = ssGetIWork(S);
int *last_output = ssGetIWork(S) + 1;
int *out_count = ssGetIWork(S) + 2;
int *scramble = ssGetIWork(S) + 3;
int *mijk = ssGetIWork(S) + 3 + 23;
int *data_scrm = ssGetIWork(S) + 3 + 23 + 8;
int i;
/*
#ifdef MATLAB_MEX_FILE
if (0) {
char err_msg[256];
sprintf(err_msg, "Parame initial rate_s = %d; rate_r = %d; rate_j = %d; rate_p = %d;\n", rate_s, rate_r, rate_j, rate_p);
mexPrintf(err_msg);
sprintf(err_msg, "rate_b = %d; rate_q = %d; rate_K = %d; rate_M = %d;\n", rate_b, rate_q, rate_K, rate_M);
mexPrintf(err_msg);
sprintf(err_msg, "ShMp_N=%d , ShMp_M=%d;\n", mxGetN(ShMp), mxGetM(ShMp));
mexPrintf(err_msg);
}
#endif
*/
*last_updata = 0;
*last_output = 0;
*out_count = 0;
for (i = 0; i < 23; i++)
scramble[i] = 0;
for (i = 0; i < 8; i++)
mijk[i] = 0;
for (i = 0; i < rate_b; i++)
data_scrm[i] = 0;
}
/*
* mdlOutputs - computes the outputs of the S-Function
*/
static void mdlOutputs(y, x, u, S, tid)
double *y, *x, *u;
SimStruct *S;
int tid;
{
int rate_s = (int) mxGetPr(RATE)[0];
int rate_r = (int) mxGetPr(RATE)[1];
int rate_j = (int) mxGetPr(RATE)[2];
int rate_p = (int) mxGetPr(RATE)[3];
int rate_b = (int) mxGetPr(RATE)[5];
int rate_q = (int) mxGetPr(RATE)[6];
int rate_K = (int) mxGetPr(RATE)[7];
int rate_M = (int) mxGetPr(RATE)[8];
int *last_updata = ssGetIWork(S);
int *last_output = ssGetIWork(S) + 1;
int *out_count = ssGetIWork(S) + 2;
int *scramble = ssGetIWork(S) + 3;
int *mijk = ssGetIWork(S) + 3 + 23;
int *data_scrm = ssGetIWork(S) + 3 + 23 + 8;
if ((u[rate_b] > 0) && (*last_updata == 0)) {
/* begin the major updating work. */
double *g2 = mxGetPr(ShMp);
double *g4 = mxGetPr(ShMp) + 8 *(rate_M-1)+1;
double *g8 = mxGetPr(ShMp) + 16*(rate_M-1)+2;
double *z8 = mxGetPr(ShMp) + 24*(rate_M-1)+3;
long R[8];
long A, B, C, D, E, F, G, H, R_bef, R_now, V_bef, V_now;
int i, j;
#ifdef MATLAB_MEX_FILE
if (0) {
char err_msg[256];
sprintf(err_msg, "Output rate_s = %d; rate_r = %d; rate_j = %d; rate_p = %d;\n", rate_s, rate_r, rate_j, rate_p);
mexPrintf(err_msg);
sprintf(err_msg, "rate_b = %d; rate_q = %d; rate_K = %d; rate_M = %d;\n", rate_b, rate_q, rate_K, rate_M);
mexPrintf(err_msg);
sprintf(err_msg, "ShMp_N=%d, ShMp_M=%d;\n", mxGetN(ShMp), mxGetM(ShMp));
mexPrintf(err_msg);
sprintf(err_msg, "\n\n\n");
mexPrintf(err_msg);
}
#endif
/* define the maximum size vector */
if (1) {
/*scramble */
for (i = 0; i < rate_b; i++) {
data_scrm[i] = ((int)u[i] + scramble[17] + scramble[22]) % 2;
for (j = 22; j > 0; j--)
scramble[j] = scramble[j-1];
scramble[0] = data_scrm[i];
}
} else {
for (i = 0; i < rate_b; i++)
data_scrm[i] = (int)u[i];
}
/*parser */
/* data_scrm[0:K-1] Si1 -- SiK -- Six
* data_scrm[K:K+2] I1i0, I2i0, I3i0 -- Ixij
* data_scrm[K+3:K+3+q-1] Qi001, ..., Qi00q -- Qijkx
* data_scrm[K+3+q:K+3+2*q-1] Qi011, ..., Qi01q -- Qijkx
* data_scrm[K+3+2*q:K+3+2*q+2] I1i1, I2i1, I3i1
* data_scrm[K+6+2*q:K+6+3*q-1] Qi101, ..., Qi10q
* data_scrm[K+6+3*q:K+6+4*q-1] Qi111, ..., Qi11q
* data_scrm[K+6+4*q:K+6+4*q+2] I1i2, I2i2, I3i2
* data_scrm[K+9+4*q:K+9+5*q-1] Qi201, ..., Qi20q
* data_scrm[K+9+5*q:K+9+6*q-1] Qi211, ..., Qi21q
* data_scrm[K+9+6*q:K+9+6*q+2] I1i3, I2i3, I3i3
* data_scrm[K+12+6*q:K+12+7*q-1] Qi301, ..., Qi30q
* data_scrm[K+12+7*q:K+12+8*q-1] Qi311, ..., Qi31q
*/
/* Shell Mapper */
/* calculate A, B, C, D, E, F, G, H. */
for (i = 0; i< 8; i++) {
R[i] = 0;
}
A = 0; B = 0; C = 0; D = 0; E = 0; F = 0; G = 0;;
/* A*/
R[0] = data_scrm[rate_K - 1];
i = rate_K - 2;
while (i >= 0) {
R[0] = R[0] * 2 + data_scrm[i];
i--;
}
A = 0;
while ((int)z8[A] <= R[0]) {
A = A + 1;;
}
A = A - 1;
#ifdef MATLAB_MEX_FILE
if (0) {
char err_msg[256];
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