Cypress Semiconductor CY7C1399B Manual de usuario descargar pdf (Pagina 12)

AN57322

November 4, 2009 Document No. 001-57322 Rev. ** 12

FIFORESET = 0x00; // clear NAKALL bit to

resume normal operation

SYNCDELAY;

EP2FIFOCFG = 0x00; // allow core to see

zero to one transition of auto out bit

SYNCDELAY;

EP2FIFOCFG = 0x10; // auto out mode,

disable PKTEND zero length send, byte ops

SYNCDELAY;

EP6FIFOCFG = 0x08; // auto in mode,

disable PKTEND zero length send, byte ops

SYNCDELAY;

// enable dual autopointer feature

AUTOPTRSETUP |= 0x01;

GpifInit (); // initialize GPIF

registers

PORTACFG = 0x00;

OEA |= 0xF3;

IOA &= 0xFC;

Rwuen = TRUE; // Enable

remote-wakeup

}

BOOL DR_SetConfiguration(void) // Called

when a Set Configuration command is

received

{

if( EZUSB_HIGHSPEED( ) )

{

// FX2 enumerated at high speed

SYNCDELAY;

EP6AUTOINLENH = 0x02; // set

AUTOIN commit length to 512 bytes

SYNCDELAY;

EP6AUTOINLENL = 0x00;

SYNCDELAY;

enum_high_speed = TRUE;

}

else

{ // FX2 enumerated at full speed

SYNCDELAY;

EP6AUTOINLENH = 0x00; // set AUTOIN

commit length to 64 bytes

SYNCDELAY;

EP6AUTOINLENL = 0x40;

SYNCDELAY;

enum_high_speed = FALSE;

}

Configuration = SETUPDAT[2];

return(TRUE); // Handled by

user code

}

void TD_Poll(void)

{

// blink LED0 to indicate firmware is

running

if (++LED_Count == 10000)

{

if (LED_Status)

{

LED_Off (bmBIT0);

LED_Status = 0;

}

else

{

LED_On (bmBIT0);

LED_Status = 1;

}

LED_Count = 0;

}

}

BOOL DR_VendorCmnd(void)

{

BYTE tmp;

switch (SETUPDAT[1])

{

case VR_NAKALL_ON:

tmp = FIFORESET;

tmp |= bmNAKALL;

SYNCDELAY;

FIFORESET = tmp;

break;

case VR_NAKALL_OFF:

tmp = FIFORESET;

tmp &= ~bmNAKALL;

SYNCDELAY;

FIFORESET = tmp;

break;

case VX_BB: // actuate write to

SRAM

{

EP0BUF[0] = VX_BB;

IOA = (IOA & 0x0F) + (SETUPDAT[3] <<

3); // select bank of 16x512 (bit shift

MSB of wValue by 3

// and OR it

with PA[7:4]

GPIFADRH = SETUPDAT[3];

// set GPIFADR[8:0] to address passed down

in wValue

GPIFADRL = SETUPDAT[2];

len = ( (SETUPDAT[5] << 8) +

SETUPDAT[4] ); // get transfer length from

wIndex field

while (len)

// while the transfer length is non-zero,

{

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