Cypress Semiconductor FX2LP Technical Information PDF herunterladen (Seite 218)

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EZ-USB FX2 Technical Reference Manual

Page 10-28 EZ-USB FX2 Technical Reference Manual v2.1

GPIFWFSELECT = InitData[ 5 ];

GPIFREADYSTAT = InitData[ 6 ];

// use dual autopointer feature...

AUTOPTRSETUP = 0x07; // inc both pointers,

// ...warning: this introduces pdata hole(s)

// ...at E67B (XAUTODAT1) and E67C (XAUTODAT2)

// source

APTR1H = MSB( &WaveData );

APTR1L = LSB( &WaveData );

// destination

AUTOPTRH2 = 0xE4;

AUTOPTRL2 = 0x00;

// transfer

for ( i = 0x00; i < 128; i++ )

{

EXTAUTODAT2 = EXTAUTODAT1;

}

// Configure GPIF Address pins, output initial value,

PORTCCFG = 0xFF; // [7:0] as alt. func. GPIFADR[7:0]

OEC = 0xFF; // and as outputs

PORTECFG |= 0x80; // [8] as alt. func. GPIFADR[8]

OEC |= 0x80; // and as output

// ...OR... tri-state GPIFADR[8:0] pins

// PORTCCFG = 0x00; // [7:0] as port I/O

// OEC = 0x00; // and as inputs

// PORTECFG &= 0x7F; // [8] as port I/O

// OEC &= 0x7F; // and as input

// GPIF address pins update when GPIFADRH/L written

SYNCDELAY; //

GPIFADRH = 0x00; // bits[7:1] always 0

SYNCDELAY; //

GPIFADRL = 0x00; // point to PERIPHERAL address 0x0000

}

#ifdef TESTING_GPIF

// TODO: You may add additional code below.

void OtherInit( void )

{ // interface initialization

// ...see TD_Init( );

}

// Set Address GPIFADR[8:0] to PERIPHERAL

void Peripheral_SetAddress( WORD gaddr )

{

SYNCDELAY; //

GPIFADRH = gaddr >> 8;

SYNCDELAY; //

GPIFADRL = ( BYTE )gaddr; // setup GPIF address

}

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