Cypress Semiconductor AN6077 Manual do Utilizador descarregar pdf (Página 84)

WORD i;

WORD count;

if(!(EP2468STAT & bmEP2EMPTY))

{ // check EP2 EMPTY(busy) bit in EP2468STAT (SFR),

core set's this bit when FIFO is empty

if(!(EP2468STAT & bmEP6FULL))

{ // check EP6 FULL(busy) bit in EP2468STAT (SFR),

core set's this bit when FIFO is full

APTR1H = MSB( &EP2FIFOBUF );

APTR1L = LSB( &EP2FIFOBUF );

AUTOPTRH2 = MSB( &EP6FIFOBUF );

AUTOPTRL2 = LSB( &EP6FIFOBUF );

count = (EP2BCH << 8) + EP2BCL;

// loop EP2OUT buffer data to EP6IN

for( i = 0x0000; i < count; i++ )

{

// setup to transfer EP2OUT buffer to EP6IN buffer

using AUTOPOINTER(s)

EXTAUTODAT2 = EXTAUTODAT1;

}

EP6BCH = EP2BCH;

SYNCDELAY;

EP6BCL = EP2BCL; // arm EP6IN

SYNCDELAY;

EP2BCL = 0x80; // re(arm) EP2OUT

}

if(!(EP2468STAT & bmEP4EMPTY))

{ // check EP4 EMPTY(busy) bit in EP2468STAT (SFR),

core set's this bit when FIFO is empty

if(!(EP2468STAT & bmEP8FULL))

{ // check EP8 FULL(busy) bit in EP2468STAT (SFR),

core set's this bit when FIFO is full

APTR1H = MSB( &EP4FIFOBUF );

APTR1L = LSB( &EP4FIFOBUF );

AUTOPTRH2 = MSB( &EP8FIFOBUF );

AUTOPTRL2 = LSB( &EP8FIFOBUF );

count = (EP4BCH << 8) + EP4BCL;

// loop EP4OUT buffer data to EP8IN

for( i = 0x0000; i < count; i++ )

{

// setup to transfer EP4OUT buffer to EP8IN buffer

using AUTOPOINTER(s)

EXTAUTODAT2 = EXTAUTODAT1;

}

EP8BCH = EP4BCH;

SYNCDELAY;

EP8BCL = EP4BCL; // arm EP8IN

SYNCDELAY;

EP4BCL = 0x80; // re(arm) EP4OUT

}

BOOL TD_Suspend(void) // Called before the device

goes into suspend mode

{

return(TRUE);

}

BOOL TD_Resume(void) // Called after the device

resumes

{

return(TRUE);

}

//-------------------------------------------------------------------------

// Device Request hooks

// The following hooks are called by the end point 0 device

request parser.

//-------------------------------------------------------------------------

BOOL DR_GetDescriptor(void)

{

return(TRUE);

}

BOOL DR_SetConfiguration(void) // Called when a Set

Configuration command is received

{

Configuration = SETUPDAT[2];

return(TRUE); // Handled by user code

}

BOOL DR_GetConfiguration(void) // Called when a Get

Configuration command is received

{

EP0BUF[0] = Configuration;

EP0BCH = 0;

EP0BCL = 1;

return(TRUE); // Handled by user code

}

BOOL DR_SetInterface(void) // Called when a Set

Interface command is received

{

AlternateSetting = SETUPDAT[2];

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