📄 usbmain.pp
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/* 03/05/01 $MH$ added XferBytCnt to keep track of actual number of data */
/* bytes moved in (out) to (from) the data buffer. The size of the */
/* data buffer has to be (N+1) words. Where N = (#bytes of data)/2, the */
/* the extra word at the beginning of the data buffer is used to store the */
/* actual number of bytes moved in (out). */
/* */
/******************************************************************************/
typedef struct
{
USB_EpNum EpNum; /* USB endpoint number */
USB_XferType XferType; /* USB xfer type supported by the EP */
Uint16 MaxPktSiz; /* Max pkt size supported by the EP */
Uint16 EventMask; /* ORed value of USB_EVENTS, the USB */
/* event dispatcher will call the event */
/* ISR if event matches with EventMask */
USB_EVENT_ISR Fxn; /* Pointer to USB event ISR */
Uint16 DataFlags; /* ORed combination of USB_DATA_INOUT_FLAGS */
Uint16 Status; /* Reserved for future use */
Uint16 EDReg_SAddr; /* Endpoint desc reg block start addr */
/* 2 regs for EP0, 6 regs for the rest */
Uint16 DMA_SAddr; /* DMA reg block start addr */
/* used only for EP1 - EP7 */
Uint16 TotBytCnt; /* Total number of bytes to xfer */
Uint16 BytInThisSeg; /* # of bytes in the active node of */
/* the linked list */
Uint16 *XferBytCnt; /* Pointer to store the number of bytes */
/* moved in (out) - stored in the first of */
/* the buffer */
Uint16 *pBuffer; /* Active data buffer pointer */
USB_DataStruct *pNextBuffer; /* Pointer to the next node of the */
/* linked list */
Uint16 EventFlag; /* Flag to indicate the event cuased */
/* USB interrupt */
} USB_EpObj,*USB_EpHandle;
/******************************************************************************/
/* */
/* USB_NULL_EpHandle */
/* */
/* NULL pointer for USB Enpoint Handle. During the endpoint initialization */
/* NULL endpoint handles are assigned to unused endpoints */
/* */
/******************************************************************************/
/******************************************************************************/
/* */
/* USB API Prototypes */
/* */
/******************************************************************************/
/******************************************************************************/
/* Name : USB_setAPIVectorAddress */
/* */
/* Catagory : Software Initialization */
/* */
/* Purpose : Initialize API vector pointer */
/* */
/* Author : MH */
/* */
/* Based on : */
/* */
/*============================================================================*/
/* Arguments: None */
/* */
/*============================================================================*/
/* Return Value: None */
/* */
/* */
/*============================================================================*/
/* Comments: */
/* */
/* The user application access to the USB API via a relocate-able call */
/* table. */
/* */
/* This relocateable table allows user applications to call the API */
/* routines out of ROM or out of RAM by relocating the API Vector */
/* Table to RAM and replacing any desired functions with new ones */
/* while still being able to use ROM functions. The initial API */
/* Vector Table contained in this file is the ROM version which will */
/* be used as the default table until or if a user application moves */
/* the table to another location in ROM or more likely RAM. */
/* */
/* This scheme is specially implemented to replace the USB API in the */
/* ROM with the updated ones. */
/* */
/* USB buffer RAM locations 0x667E and 0x667F are reserved to point to */
/* the API Vector Table. These are 8 bit locations and hold the */
/* two bytes of a 24 bit address, the lower byte is assumed to be 0 */
/* thus forcing the table to be allocated on 256 byte boundaries. */
/* */
/*============================================================================*/
/* History: */
/* */
/* Created: 16 Jan 2001 */
/* */
/******************************************************************************/
extern void USB_setAPIVectorAddress();
/******************************************************************************/
/* Name : USB_initPLL */
/* */
/* Catagory : Device Control */
/* */
/* Purpose : Initailize USB PLL to generate clock for the USB module */
/* */
/* Author : MH */
/* */
/* Based on : C55x PLL init routine */
/* */
/*============================================================================*/
/* Arguments: */
/* */
/* inclk : Input clock (supplied at CLKIN pin) frequency ( in MHz) */
/* */
/* outclk : Desired clock frequency (in MHz) for the USB moduel, the */
/* outclk must be 48 MHz for the proper operation of the USB */
/* module. */
/* */
/* plldiv : Input clock (supplied at CLKIN pin) devide down value, used */
/* for USB PLL enable as well as USB PLL bypass mode */
/* */
/*============================================================================*/
/* Return Value: None */
/* */
/* */
/*============================================================================*/
/* Comments: */
/* */
/* pllmult = (outclk * (plldiv+1)) / inclk */
/* */
/* if pllmult > 1 */
/* outclk = (pllmult / (plldiv + 1)) * inclk */
/* */
/* if pllmult < 1 */
/* outclk = (1 / (plldiv + 1)) * inclk */
/* */
/*============================================================================*/
/* History: */
/* */
/* Created: 16 Jan 2001 */
/* */
/******************************************************************************/
extern void USB_initPLL(Uint16 inclk, Uint16 outclk, Uint16 plldiv);
/******************************************************************************/
/* Name : USB_connectDev */
/* */
/* Catagory : Device Control */
/* */
/* Purpose : Connect the USB module to upstream port (D+ pullup enabled) */
/* */
/* */
/* Author : MH */
/* */
/* Based on : */
/* */
/* */
/*============================================================================*/
/* Arguments: */
/* */
/* DevNum: USB device number, enumerated data type of USB_DevNum. */
/* Only USB0 is active currently */
/* */
/* */
/* */
/* */
/* */
/* */
/*============================================================================*/
/* Return Value: */
/* */
/* None */
/* */
/*============================================================================*/
/* Comments: */
/* */
/* */
/* */
/*============================================================================*/
/* History: */
/* */
/* Created: 30 Mar 2001 */
/* */
/******************************************************************************/
extern void USB_connectDev(USB_DevNum DevNum);
/******************************************************************************/
/* Name : USB_disconnectDev */
/* */
/* Catagory : Device Control */
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