CS18101X datasheet(35/54 Pages) CIRRUS

35 / 54 page

CobraNet Hardware User’s Manual

HMI Reference Code

DS651UM23

Version 2.3

while( !( ReadRegister( MSG_D ) & ( 1 << MSG_TRANSLATION_BO ) ) );

/* goto translation */

WriteRegister( MSG_C, MOP_GOTO_TRANSLATION_READ );

SendMessage( CVR_MULTIPLEX_OP );

/* "garbage" read clears data pipeline */

ReadRegister( DATA_D );

/* maintain local pointers */

PeekPointer = PokePointer = address;

PeekLimit = PokeLimit = PeekPointer +

ReadRegister( MSG_C ) + ( ReadRegister( MSG_B ) << 8 );

/* read-only region addressed */

if( !( ReadRegister( MSG_A ) & ( 1 << MSG_WRITABLE_BO ) ) ) {

PokeLimit = PokePointer;

}

unsigned long Peek(

long address )

{

if( address != PeekPointer ) {

SetAddress( address );

}

if( PeekPointer >= PeekLimit ) {

throw "Peek addressing error!";

}

unsigned long value = ReadRegister( DATA_A ) << 24;

value += ReadRegister( DATA_B ) << 16;

value += ReadRegister( DATA_C ) << 8;

value += ReadRegister( DATA_D );

PeekPointer++; /* maintain local pointer */

return value;

}

void Poke(

long address,

unsigned long value )

{

if( address != PokePointer ) {

SetAddress( address );

}

if( PokePointer >= PokeLimit ) {

throw "Poke addressing error or read-only!";

}

WriteRegister( DATA_A, (unsigned char) ( ( value >> 24 ) & 0xff ) );

WriteRegister( DATA_B, (unsigned char) ( ( value >> 16 ) & 0xff ) );

WriteRegister( DATA_C, (unsigned char) ( ( value >> 8 ) & 0xff ) );

WriteRegister( DATA_D, (unsigned char) ( value & 0xff ) );

/* maintain local pointers */

PokePointer++;

PeekPointer = -1; /* force SetAddress()next Peek() to freshen data */

}

CS18101X Datasheet(PDF) 35 Page - Cirrus Logic

CS18101X Datasheet(HTML) 35 Page - Cirrus Logic

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