Cypress Semiconductor AN6077 Bedienungsanleitung PDF herunterladen (Seite 79)

4, // EP6OUT

4, // EP6IN

5, // EP8OUT

5, // EP8IN

};

// macro for generating the address of an endpoint's control

and status register (EPnCS)

#define epcs(EP) (EPCS_Offset_Lookup_Table[(EP & 0x7E)

| (EP > 128)] + 0xE6A1)

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

// Code

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

// Task dispatcher

void main(void)

{

DWORD i;

WORD offset;

DWORD DevDescrLen;

DWORD j=0;

WORD IntDescrAddr;

WORD ExtDescrAddr;

BYTE Packet[PACKETSIZE];

// Initialize Global States

Sleep = FALSE; // Disable sleep mode

Rwuen = FALSE; // Disable remote wakeup

Selfpwr = FALSE; // Disable self powered

GotSUD = FALSE; // Clear "Got setup data" flag

// Initialize user device

TD_Init();

// The following section of code is used to relocate the

descriptor table.

// The frameworks uses SUDPTRH and SUDPTRL to

automate the SETUP requests

// for descriptors. These registers only work with memory

locations

// in the EZ-USB internal RAM. Therefore, if the

descriptors are located

// in external RAM, they must be copied to in internal

RAM.

// The descriptor table is relocated by the frameworks

ONLY if it is found

// to be located in external memory.

pDeviceDscr = (WORD)&DeviceDscr;

pDeviceQualDscr = (WORD)&DeviceQualDscr;

pHighSpeedConfigDscr =

(WORD)&HighSpeedConfigDscr;

pFullSpeedConfigDscr = (WORD)&FullSpeedConfigDscr;

pStringDscr = (WORD)&StringDscr;

// Is the descriptor table in external RAM (> 16Kbytes)? If

yes,

// then relocate.

// Note that this code only checks if the descriptors START

// external RAM. It will not work if the descriptor table

spans

// internal and external RAM.

Get_Packet(Packet);

Contador(timebase, Packet);

if ((WORD)&DeviceDscr & 0xC000)

{

// first, relocate the descriptors

IntDescrAddr = INTERNAL_DSCR_ADDR;

ExtDescrAddr = (WORD)&DeviceDscr;

DevDescrLen = (WORD)&UserDscr -

(WORD)&DeviceDscr + 2;

for (i = 0; i < DevDescrLen; i++)

*((BYTE xdata *)IntDescrAddr+i) = *((BYTE xdata

*)ExtDescrAddr+i);

// update all of the descriptor pointers

pDeviceDscr = IntDescrAddr;

offset = (WORD)&DeviceDscr -

INTERNAL_DSCR_ADDR;

pDeviceQualDscr -= offset;

pConfigDscr -= offset;

pOtherConfigDscr -= offset;

pHighSpeedConfigDscr -= offset;

pFullSpeedConfigDscr -= offset;

pStringDscr -= offset;

}

EZUSB_IRQ_ENABLE(); // Enable USB interrupt

(INT2)

EZUSB_ENABLE_RSMIRQ(); // Wake-up interrupt

INTSETUP |= (bmAV2EN | bmAV4EN); // Enable INT

2 & 4 autovectoring

bmHSGRANT; // Enable selected interrupts

EA = 1; // Enable 8051 interrupts

#ifndef NO_RENUM

1 2 ... 74 75 76 77 78 79 80 81 82 83 84 ... 87 88

Kommentare zu diesen Handbüchern

Keine Kommentare

Cypress Semiconductor AN6077 Bedienungsanleitung Seite 79

Kommentare zu diesen Handbüchern

Verwandte Produkte und Handbücher für Vernetzung Cypress Semiconductor AN6077