Gecko3 - CCC Event Weblog

E. Quellcode
// The 4K demo t o o l s l o c a t e a l l code s e c t i o n s in e x t e r n a l memory .
// The d e s c r i p t o r t a b l e i s r e l o c a t e d by t h e frameworks ONLY i f i t i s found
// to be l o c a t e d in e x t e r n a l memory .
pDeviceDscr = (WORD)&DeviceDscr ;
131 pDeviceQualDscr = (WORD)&DeviceQualDscr ;
pHighSpeedConfigDscr = (WORD)&HighSpeedConfigDscr ;
pFullSpeedConfigDscr = (WORD)&FullSpeedConfigDscr ;
pStringDscr = (WORD)&S t r i n g D s c r ;
136 i f (EZUSB HIGHSPEED( ) )
{
pConfigDscr = pHighSpeedConfigDscr ;
pOtherConfigDscr = pFullSpeedConfigDscr ;
}
141 else
{
pConfigDscr = pFullSpeedConfigDscr ;
pOtherConfigDscr = pHighSpeedConfigDscr ;
}
146
i f ( (WORD)&DeviceDscr & 0 xe000 )
{
IntDescrAddr = INTERNAL DSCR ADDR;
ExtDescrAddr = (WORD)&DeviceDscr ;
151 DevDescrLen = (WORD)&UserDscr − (WORD)&DeviceDscr + 2 ;
for ( i = 0 ; i < DevDescrLen ; i ++)
∗ ( (BYTE xdata ∗) IntDescrAddr+i ) = 0xCD;
for ( i = 0 ; i < DevDescrLen ; i ++)
∗ ( (BYTE xdata ∗) IntDescrAddr+i ) = ∗ ( (BYTE xdata ∗) ExtDescrAddr+i ) ;
156 pDeviceDscr = IntDescrAddr ;
o f f s e t = (WORD)&DeviceDscr − INTERNAL DSCR ADDR;
pDeviceQualDscr −= o f f s e t ;
pConfigDscr −= o f f s e t ;
pOtherConfigDscr −= o f f s e t ;
161 pHighSpeedConfigDscr −= o f f s e t ;
pFullSpeedConfigDscr −= o f f s e t ;
pStringDscr −= o f f s e t ;
}
166 EZUSB IRQ ENABLE( ) ; // Enable USB i n t e r r u p t (INT2)
EZUSB ENABLE RSMIRQ( ) ; // Wake−up i n t e r r u p t
INTSETUP |= (bmAV2EN | bmAV4EN) ; // Enable INT 2 & 4 a u t o v e c t o r i n g
171 USBIE |= bmSUDAV | bmSUTOK | bmSUSP | bmURES | bmHSGRANT; // Enable s e l e c t e d
i n t e r r u p t s
EA = 1 ; // Enable 8051 i n t e r r u p t s
#ifndef NO RENUM
// Renumerate i f n e c e s s a r y . Do t h i s by c h e c k i n g t h e renum b i t . I f i t
176 // i s a l r e a d y set , t h e r e i s no need to renumerate . The renum b i t w i l l
// a l r e a d y be s e t i f t h i s firmware was loaded from an eeprom .
i f ( ! ( USBCS & bmRENUM) )
{
EZUSB Discon (TRUE) ; // renumerate
181 }
#endif
// u n c o n d i t i o n a l l y re−connect . I f we loaded from eeprom we are
// d i s c o n n e c t e d and need to connect . I f we j u s t renumerated t h i s
186 // i s not n e c e s s a r y but doesn ’ t hurt anything
USBCS &=˜bmDISCON;
CKCON = (CKCON&(˜bmSTRETCH) ) | FW STRETCH VALUE; // Set s t r e t c h to 0 ( a f t e r
renumeration )
60 Matthias Zurbrügg, Christoph Zimmermann