usbhost_lpc17xx.c

USBHostLite_LPC17xx(FATFS).rar

*
* Description: This function is used to receive the control information
*
* Arguments  : bm_request_type
*              b_request
*              w_value
*              w_index
*              w_length
*              buffer
*
* Returns    : OK       if Success
*              ERROR    if Failed
*
**************************************************************************************************************
*/
   
USB_INT32S  Host_CtrlRecv (         USB_INT08U   bm_request_type,
                                    USB_INT08U   b_request,
                                    USB_INT16U   w_value,
                                    USB_INT16U   w_index,
                                    USB_INT16U   w_length,
                          volatile  USB_INT08U  *buffer)
{
    USB_INT32S  rc;


    Host_FillSetup(bm_request_type, b_request, w_value, w_index, w_length);
    rc = Host_ProcessTD(EDCtrl, TD_SETUP, TDBuffer, 8);
    if (rc == OK) {
        if (w_length) {
            rc = Host_ProcessTD(EDCtrl, TD_IN, TDBuffer, w_length);
        }
        if (rc == OK) {
            rc = Host_ProcessTD(EDCtrl, TD_OUT, NULL, 0);
        }
    }
    return (rc);
}

/*
**************************************************************************************************************
*                                         SEND THE CONTROL INFORMATION
*
* Description: This function is used to send the control information
*
* Arguments  : None
*
* Returns    : OK		              if Success
*              ERR_INVALID_BOOTSIG    if Failed
*
**************************************************************************************************************
*/

USB_INT32S  Host_CtrlSend (          USB_INT08U   bm_request_type,
                                     USB_INT08U   b_request,
                                     USB_INT16U   w_value,
                                     USB_INT16U   w_index,
                                     USB_INT16U   w_length,
                           volatile  USB_INT08U  *buffer)
{
    USB_INT32S  rc;


    Host_FillSetup(bm_request_type, b_request, w_value, w_index, w_length);

    rc = Host_ProcessTD(EDCtrl, TD_SETUP, TDBuffer, 8);
    if (rc == OK) {
        if (w_length) {
            rc = Host_ProcessTD(EDCtrl, TD_OUT, TDBuffer, w_length);
        }
        if (rc == OK) {
            rc = Host_ProcessTD(EDCtrl, TD_IN, NULL, 0);
        }
    }
    return (rc);
}

/*
**************************************************************************************************************
*                                          FILL SETUP PACKET
*
* Description: This function is used to fill the setup packet
*
* Arguments  : None
*
* Returns    : OK		              if Success
*              ERR_INVALID_BOOTSIG    if Failed
*
**************************************************************************************************************
*/

void  Host_FillSetup (USB_INT08U   bm_request_type,
                      USB_INT08U   b_request,
                      USB_INT16U   w_value,
                      USB_INT16U   w_index,
                      USB_INT16U   w_length)
{
	int i;
	for (i=0;i<w_length;i++)
		TDBuffer[i] = 0;
	
    TDBuffer[0] = bm_request_type;
    TDBuffer[1] = b_request;
    WriteLE16U(&TDBuffer[2], w_value);
    WriteLE16U(&TDBuffer[4], w_index);
    WriteLE16U(&TDBuffer[6], w_length);
}



/*
**************************************************************************************************************
*                                         INITIALIZE THE TRANSFER DESCRIPTOR
*
* Description: This function initializes transfer descriptor
*
* Arguments  : Pointer to TD structure
*
* Returns    : None
*
**************************************************************************************************************
*/

void  Host_TDInit (volatile  HCTD *td)
{

    td->Control    = 0;
    td->CurrBufPtr = 0;
    td->Next       = 0;
    td->BufEnd     = 0;
}

/*
**************************************************************************************************************
*                                         INITIALIZE THE ENDPOINT DESCRIPTOR
*
* Description: This function initializes endpoint descriptor
*
* Arguments  : Pointer to ED strcuture
*
* Returns    : None
*
**************************************************************************************************************
*/

void  Host_EDInit (volatile  HCED *ed)
{

    ed->Control = 0;
    ed->TailTd  = 0;
    ed->HeadTd  = 0;
    ed->Next    = 0;
}

/*
**************************************************************************************************************
*                                 INITIALIZE HOST CONTROLLER COMMUNICATIONS AREA
*
* Description: This function initializes host controller communications area
*
* Arguments  : Pointer to HCCA
*
* Returns    : 
*
**************************************************************************************************************
*/

void  Host_HCCAInit (volatile  HCCA  *hcca)
{
    USB_INT32U  i;


    for (i = 0; i < 32; i++) {

        hcca->IntTable[i] = 0;
        hcca->FrameNumber = 0;
        hcca->DoneHead    = 0;
    }

}

/*
**************************************************************************************************************
*                                         WAIT FOR WDH INTERRUPT
*
* Description: This function is infinite loop which breaks when ever a WDH interrupt rises
*
* Arguments  : None
*
* Returns    : None
*
**************************************************************************************************************
*/

void  Host_WDHWait (void)
{
  while (!HOST_WdhIntr) {
    ;
  }
  HOST_WdhIntr = 0;
}

/*
**************************************************************************************************************
*                                         READ LE 32U
*
* Description: This function is used to read an unsigned integer from a charecter buffer in the platform
*              containing little endian processor
*
* Arguments  : pmem    Pointer to the charecter buffer
*
* Returns    : val     Unsigned integer
*
**************************************************************************************************************
*/

USB_INT32U  ReadLE32U (volatile  USB_INT08U  *pmem)
{
    USB_INT32U   val;

    ((USB_INT08U *)&val)[0] = pmem[0];
    ((USB_INT08U *)&val)[1] = pmem[1];
    ((USB_INT08U *)&val)[2] = pmem[2];
    ((USB_INT08U *)&val)[3] = pmem[3];

    return (val);
}

/*
**************************************************************************************************************
*                                        WRITE LE 32U
*
* Description: This function is used to write an unsigned integer into a charecter buffer in the platform 
*              containing little endian processor.
*
* Arguments  : pmem    Pointer to the charecter buffer
*              val     Integer value to be placed in the charecter buffer
*
* Returns    : None
*
**************************************************************************************************************
*/

void  WriteLE32U (volatile  USB_INT08U  *pmem,
                            USB_INT32U   val)
{
    pmem[0] = ((USB_INT08U *)&val)[0];
    pmem[1] = ((USB_INT08U *)&val)[1];
    pmem[2] = ((USB_INT08U *)&val)[2];
    pmem[3] = ((USB_INT08U *)&val)[3];
}

/*
**************************************************************************************************************
*                                          READ LE 16U
*
* Description: This function is used to read an unsigned short integer from a charecter buffer in the platform
*              containing little endian processor
*
* Arguments  : pmem    Pointer to the charecter buffer
*
* Returns    : val     Unsigned short integer
*
**************************************************************************************************************
*/

USB_INT16U  ReadLE16U (volatile  USB_INT08U  *pmem)
{
    USB_INT16U   val;

    ((USB_INT08U *)&val)[0] = pmem[0];
    ((USB_INT08U *)&val)[1] = pmem[1];


    return (val);
}

/*
**************************************************************************************************************
*                                         WRITE LE 16U
*
* Description: This function is used to write an unsigned short integer into a charecter buffer in the
*              platform containing little endian processor
*
* Arguments  : pmem    Pointer to the charecter buffer
*              val     Value to be placed in the charecter buffer
*
* Returns    : None
*
**************************************************************************************************************
*/

void  WriteLE16U (volatile  USB_INT08U  *pmem,
                            USB_INT16U   val)
{
    pmem[0] = ((USB_INT08U *)&val)[0];
    pmem[1] = ((USB_INT08U *)&val)[1];
}

/*
**************************************************************************************************************
*                                         READ BE 32U
*
* Description: This function is used to read an unsigned integer from a charecter buffer in the platform
*              containing big endian processor
*
* Arguments  : pmem    Pointer to the charecter buffer
*
* Returns    : val     Unsigned integer
*
**************************************************************************************************************
*/

USB_INT32U  ReadBE32U (volatile  USB_INT08U  *pmem)
{
    USB_INT32U   val;

    ((USB_INT08U *)&val)[0] = pmem[3];
    ((USB_INT08U *)&val)[1] = pmem[2];
    ((USB_INT08U *)&val)[2] = pmem[1];
    ((USB_INT08U *)&val)[3] = pmem[0];

    return (val);
}

/*
**************************************************************************************************************
*                                         WRITE BE 32U
*
* Description: This function is used to write an unsigned integer into a charecter buffer in the platform
*              containing big endian processor
*
* Arguments  : pmem    Pointer to the charecter buffer
*              val     Value to be placed in the charecter buffer
*
* Returns    : None
*
**************************************************************************************************************
*/

void  WriteBE32U (volatile  USB_INT08U  *pmem,
                            USB_INT32U   val)
{
    pmem[0] = ((USB_INT08U *)&val)[3];
    pmem[1] = ((USB_INT08U *)&val)[2];
    pmem[2] = ((USB_INT08U *)&val)[1];
    pmem[3] = ((USB_INT08U *)&val)[0];

}

/*
**************************************************************************************************************
*                                         READ BE 16U
*
* Description: This function is used to read an unsigned short integer from a charecter buffer in the platform
*              containing big endian processor
*
* Arguments  : pmem    Pointer to the charecter buffer
*
* Returns    : val     Unsigned short integer
*
**************************************************************************************************************
*/

USB_INT16U  ReadBE16U (volatile  USB_INT08U  *pmem)
{
    USB_INT16U  val;


    ((USB_INT08U *)&val)[0] = pmem[1];
    ((USB_INT08U *)&val)[1] = pmem[0];

    return (val);
}

/*
**************************************************************************************************************
*                                         WRITE BE 16U
*
* Description: This function is used to write an unsigned short integer into the charecter buffer in the
*              platform containing big endian processor
*
* Arguments  : pmem    Pointer to the charecter buffer
*              val     Value to be placed in the charecter buffer
*
* Returns    : None
*
**************************************************************************************************************
*/

void  WriteBE16U (volatile  USB_INT08U  *pmem,
                            USB_INT16U   val)
{
    pmem[0] = ((USB_INT08U *)&val)[1];
    pmem[1] = ((USB_INT08U *)&val)[0];
}