Motorola Pro FLX Manuel d'utilisateur télécharger pdf (Page 63)

Design and Implementation of a Practical FLEX Paging Decoder

Grayson Wireless 55

}

sprintf(hpibStr,"PAG:FLEX:RATE %s",rateStr);

sendHpib(hpibStr);

sprintf(hpibStr,"DM:FORM %s",fskStr);

sendHpib(hpibStr);

delay(1000);

randomize();

#ifdef WRITETXT

sprintf(fileNameStr,"..\\data\\flx%c%s.TXT",rate,numStr);

if ( (textFile=fopen(fileNameStr,"wt")) == NULL) {

printf("Error text output file %s not created.\n", fileNameStr);

exit(-1);

}

#endif

sprintf(fileNameStr,"..\\data\\flx%c%s.RND",rate,numStr);

if ( (binFile=fopen(fileNameStr,"wb")) == NULL) {

printf("Error binary output file %s not created.\n", fileNameStr);

exit(-1);

}

//from page 2-26 in HP8648A manual

//lsb16 = 0 msb16=16926 : cycle 0 frame 0 collapse 0 repeat 0 t 0xF

pFlexBlock = new (flexBlock);

while (frame <= LAST_FRAME)

{

#ifdef ECHOINFO

printf("Forming and sending flex frame %d\n", frame);

#endif

#ifdef SENDTOHPIB

hp8648a.EnableEOT(0);

#endif

//FI = xxxx 0000 ffff fff0 0000 0 c=0, n=0, r=0, t=0

//xxxx = 1's complement fff0 + ffff

lsb14 = (frame & 0xF) + ((frame >> 4) & 0x7);

lsb14 = (lsb14 ^ 0xF) & 0xF;

msb7 = ((frame << 8) & 0x7F00) | lsb14;

frameInfo = (invert(msb7) >> 11);

// printf("frame: %d, x is 0x%04lX, fi is 0x%06lX invert fi is 0x%06lX\n", frame, lsb14, msb7,

frameInfo);

frameInfo = bch31_21_parity_plus_even(frameInfo);

frameInfo = invert(frameInfo);

// frameInfo is equal to ((unsigned long)(16926) << 16) & (unsigned long)(0xFFFF0000)

// printf("Frame Info %08lX\n",frameInfo);

sprintf(hpibStr,"PAG:FLEX:ARB:DEF");

sprintf(s," %d, %d",frame, (frameInfo >> 16) & 0xFFFF);

strcat(hpibStr,s);

sprintf(s, ", %d", frameInfo & 0xFFFF);

strcat(hpibStr,s);

#ifdef WRITETXT

fprintf(textFile,"FRAME %03d\n",frame);

fprintf(textFile,"FI=%08lX\n",frameInfo);

#endif

pFlexBlock->frameInfo = frameInfo;

for (i=0; i<maxCw; i++)

{

sendHpib(hpibStr);

strcpy(hpibStr,"");

lsb14 = random(0x4000); //return random number between 0 and 0x3FFF

msb7 = random(0x80); //return random number between 0 and 0x7F

flexData = (msb7 << 14) | lsb14;

// printf("lsb14 %lX msb7 %lX flexdata %08lX\n", lsb14, msb7, flexData);

flexData = bch31_21_parity_plus_even(flexData);

flexData = invert(flexData);

//had problem with Borland the msb and lsb conversion of flexData could not

//be done on the same line

sprintf(s, ", %d", (flexData >> 16) & 0xFFFF );

strcat(hpibStr,s);

sprintf(s, ", %d", flexData & 0xFFFF );

strcat(hpibStr,s);

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Motorola Pro FLX Manuel d'utilisateur Page 63

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