Lpc2000

hello,

We are developing USB HID and Core Driver on Olimex LPC2148 board.

The USB _ISR is getting invoked when the USB Cable is plugged out and the
interrupt DEV_STAT_INT is getting invoked.

But when i connect the USB Cable, the Reset interrupt is not getting
generated.

Thanks in Advance
Sarita

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Hi Sarita,

> We are developing USB HID and Core Driver on Olimex LPC2148 board.
> 
> The USB _ISR is getting invoked when the USB Cable is plugged out and the
> interrupt DEV_STAT_INT is getting invoked.
> 
> But when i connect the USB Cable, the Reset interrupt is not getting
> generated.

Reset triggers DEV_STAT_INT.  You then need to query engine with
CMD_USB_GET_DEV_STAT cmd, as below:

	  // Device Status interrupt
	  if(UsbDevIntrSt.Status)
	  {
	    // Clear Device status interrupt
	    DEVINTCLR = bmUSB_DevStatusInterrupt;
	    // Get device status
	    USB_DevStatus.Data = USB_Cmd(CMD_USB_GET_DEV_STAT,0);
	    // Device connection status
	    if(USB_DevStatus.ConnectChange)
	    {
	      if(UsbUserFun[UsbConnectEvent] != NULL)
	      {
	        UsbUserFun[UsbConnectEvent]((void *)USB_DevStatus.Connect);
	      }
	    }
	    // Device suspend status
	    if(USB_DevStatus.SuspendChange)
	    {
	      if(UsbUserFun[UsbSuspendEvent] != NULL)
	      {
	        UsbUserFun[UsbSuspendEvent]((void *)USB_DevStatus.Suspend);
	      }
	    }
	    // Device reset
	    if(USB_DevStatus.Reset)
	    {
	      USB_HwReset();
	      if(UsbUserFun[UsbResetEvent] != NULL)
	      {
	        UsbUserFun[UsbResetEvent](NULL);
	      }
	    }
	  }

Saritha S wrote:
> hello,
> 
> We are developing USB HID and Core Driver on Olimex LPC2148 board.
> 
> The USB _ISR is getting invoked when the USB Cable is plugged out and the
> interrupt DEV_STAT_INT is getting invoked.
> 
> But when i connect the USB Cable, the Reset interrupt is not getting
> generated.

Perhaps you forgot to clear the DEV_STAT bit so you got only 1
device state interrupt? Normally you should indeed see a reset when
connecting the device to a USB host.

Bertrik

Hello
pls find below the USB ISR and the Init functions.
Let me know if  i have to do any further initializations for getting the
Reset and the Endpoint0 interrupts

_attribute__ ((interrupt ("IRQ"))) LPC_USB_ISR(void){

 UINT32 uiInterrupt = 0;
 UINT32 uiInterruptval = 0;

 uart0Puts ("\rEntered ISR\n");

 /* set the uiInterrupt to the Device Interrupt Status Register */
 uiInterrupt = DEV_INT_STAT;

 if (uiInterrupt & DEV_STAT_INT)
 {
  DEV_INT_CLR = uiInterrupt;
  VICVectAddr = 0;

  WrCmd(CMD_GET_DEV_STAT);
  uiInterruptval = RdCmdDat(DAT_GET_DEV_STAT);

  /* If the Reset bit is set,then invoke ResetUSB() to reset the USB Device
*/
  if (uiInterruptval & DEV_RST)
  {
      uart0Puts ("\rReset  Interrupt\n");
    ResetUSB();
   goto ISREnd;
  }

  if (uiInterruptval & DEV_SUS_CH)
  {
     if (uiInterruptval  & DEV_SUS)
   {
      }
     else
   {

   }
   goto ISREnd;
  } /* End of if (val & DEV_SUS_CH) */

    /* If the Connection Status is changed */
  if (uiInterruptval & DEV_CON_CH)
  {
   uart0Puts ("\rConnection Change  Interrupt\n");
   /* Clear the and acknowledge the interrupt received */
      goto ISREnd;
  }
 } /* End of if (uiInterrupt & DEV_STAT_INT) */

 /*
  *If the interrupt received is Endpoint's Slow Interrupt on the Control
  * EndPoint
  */
 if (uiInterrupt & EP_SLOW_INT)
 {

  uart0Puts ("\r EP Slow Interrupt\n");

  while (EP_INT_STAT)
  {
   /* Clear the Endpoint Interrupt */
   EP_INT_CLR = 1;

     while ((DEV_INT_STAT & CDFULL_INT) == 0);
   uiInterruptval = CMD_DATA;

    if (uiInterruptval & EP_SEL_STP)
   {
       /*
     * Invoke USB_Enumeration () of the USB protocol Module to
     * parse and process the Setup Packet received
     */
     USB_Enumeration ();
     goto ISREnd;
   }
  } /* End of while (EP_INT_STAT) */
 } /* End of if (uiInterrupt & EP_SLOW_INT) */

ISREnd:
 uart0Puts ("\r Reached ISR End \n");
 DEV_INT_CLR = uiInterrupt;
 VICVectAddr = 0;

} /* End of LPC_USB_ISR () */

----------------------------------------------------------------------------
-------------------------
UINT32
InitializeUSB (UINT32 uiType, UINT32 uiTimeoutvalue)
{

   /* Select the USB Link */
   PINSEL1 &= ~0xC000C000;
   PINSEL1 |=  0x40004000;

   /* Turn On USB PCLK */
   PCONP |= 0x80000000;

   /* Configure the 48MHz USB Clock and the Fosc */
   PLL48CFG  = 0x23;
   PLL48CON  = PLLCON_PLLE;
   PLL48FEED = 0xAA;
   PLL48FEED = 0x55;

   /* Wait for PLL Lock */
   while ((PLL48STAT & PLLSTAT_PLOCK) == 0);

   /* Enable & Connect the PLL */
   PLL48CON  = PLLCON_PLLE | PLLCON_PLLC;
   PLL48FEED = 0xAA;
   PLL48FEED = 0x55;

   /* Set the USB ISR, the IRQ Slot and Enable the USB Interrupt */
   VICVectAddr0 = (unsigned int)LPC_USB_ISR;
   VICVectCntl0 = 0x20 | 22;
   VICIntEnable = 1 << 22;

   /* Enable the Device Status Interrupt */
   DEV_INT_EN = DEV_STAT_INT;

 /*Reset USB*/
/* Load endpoint index Register with physical endpoint no.*/
 EP_INDEX = 0;

 /* Load the max packet size Register */
 MAXPACKET_SIZE = USB_MAX_PACKET0;

 EP_INDEX = 1;
 MAXPACKET_SIZE = USB_MAX_PACKET0;

 /* Wait till endpoint realization is complete */
 while ((DEV_INT_STAT & EP_RLZED_INT) == 0);

 /* Clear all the Endpoint interrupts  */
 EP_INT_CLR  = INT_CLEAR;

 /* Enable the Control Endpoint Interrupt */
 EP_INT_EN   = CNTRL_EP_ENABLE;

 /* Clear the Device interrupts */
 DEV_INT_CLR = INT_CLEAR;

 /* Enable the Devcie Interrupts */
 DEV_INT_EN  = DEV_STAT_INT | EP_SLOW_INT;

/* set the default address */
 WrCmdDat(CMD_SET_ADDR, DAT_WR_BYTE(DEV_EN | 0));
 WrCmdDat(CMD_SET_ADDR, DAT_WR_BYTE(DEV_EN | 0));

/* make the softconnect active *./
  WrCmdDat(CMD_SET_DEV_STAT, DAT_WR_BYTE(DEV_CON));

  return uiErrorCode;
} /* End of InitializeUSB () */

  -----Original Message-----
  From: lpc2000@yahoogroups.com [mailto:lpc2000@yahoogroups.com]On Behalf Of
Joel Winarske
  Sent: Thursday, March 30, 2006 1:16 AM
  To: lpc2000@yahoogroups.com
  Subject: RE: [lpc2000] Not getting the Reset and Endpoint0 Interrupts


  Hi Sarita,

  > We are developing USB HID and Core Driver on Olimex LPC2148 board.
  >
  > The USB _ISR is getting invoked when the USB Cable is plugged out and
the
  > interrupt DEV_STAT_INT is getting invoked.
  >
  > But when i connect the USB Cable, the Reset interrupt is not getting
  > generated.

  Reset triggers DEV_STAT_INT.  You then need to query engine with
  CMD_USB_GET_DEV_STAT cmd, as below:

          // Device Status interrupt
          if(UsbDevIntrSt.Status)
          {
            // Clear Device status interrupt
            DEVINTCLR = bmUSB_DevStatusInterrupt;
            // Get device status
            USB_DevStatus.Data = USB_Cmd(CMD_USB_GET_DEV_STAT,0);
            // Device connection status
            if(USB_DevStatus.ConnectChange)
            {
              if(UsbUserFun[UsbConnectEvent] != NULL)
              {
                UsbUserFun[UsbConnectEvent]((void *)USB_DevStatus.Connect);
              }
            }
            // Device suspend status
            if(USB_DevStatus.SuspendChange)
            {
              if(UsbUserFun[UsbSuspendEvent] != NULL)
              {
                UsbUserFun[UsbSuspendEvent]((void *)USB_DevStatus.Suspend);
              }
            }
            // Device reset
            if(USB_DevStatus.Reset)
            {
              USB_HwReset();
              if(UsbUserFun[UsbResetEvent] != NULL)
              {
                UsbUserFun[UsbResetEvent](NULL);
              }
            }
          }







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