usbhw.c

LPC 2148 的usb例程 HID

/*----------------------------------------------------------------------------
 *      U S B  -  K e r n e l
 *----------------------------------------------------------------------------
 *      Name:    USBHW.C
 *      Purpose: USB Hardware Layer Module for Philips LPC214x
 *      Version: V1.10
 *----------------------------------------------------------------------------
 *      This software is supplied "AS IS" without any warranties, express,
 *      implied or statutory, including but not limited to the implied
 *      warranties of fitness for purpose, satisfactory quality and
 *      noninfringement. Keil extends you a royalty-free right to reproduce
 *      and distribute executable files created using this software for use
 *      on Philips LPC2xxx microcontroller devices only. Nothing else gives
 *      you the right to use this software.
 *
 *      Copyright (c) 2005-2006 Keil Software.
 *---------------------------------------------------------------------------*/

#include <LPC214X.H>                        /* LPC214x definitions */

#include "type.h"

#include "usb.h"
#include "usbcfg.h"
#include "usbreg.h"
#include "usbhw.h"
#include "usbcore.h"
#include "usbuser.h"


#define EP_MSK_CTRL 0x0001      /* Control Endpoint Logical Address Mask */
#define EP_MSK_BULK 0xC924      /* Bulk Endpoint Logical Address Mask */
#define EP_MSK_INT  0x4492      /* Interrupt Endpoint Logical Address Mask */
#define EP_MSK_ISO  0x1248      /* Isochronous Endpoint Logical Address Mask */


#if USB_DMA

DWORD UDCA[USB_EP_NUM] __at USB_RAM_ADR;    /* UDCA in USB RAM */
DWORD udca[USB_EP_NUM];                     /* UDCA saved values */

DWORD DDMemMap[2];                          /* DMA Descriptor Memory Usage */

#endif


/*
 *  Get Endpoint Physical Address
 *    Parameters:      EPNum: Endpoint Number
 *                       EPNum.0..3: Address
 *                       EPNum.7:    Dir
 *    Return Value:    Endpoint Physical Address
 */

DWORD EPAdr (DWORD EPNum) {
  DWORD val;

  val = (EPNum & 0x0F) << 1;
  if (EPNum & 0x80) {
    val += 1;
  }
  return (val);
}


/*
 *  Write Command
 *    Parameters:      cmd:   Command
 *    Return Value:    None
 */

void WrCmd (DWORD cmd) {

  DEV_INT_CLR = CCEMTY_INT;
  CMD_CODE = cmd;
  while ((DEV_INT_STAT & CCEMTY_INT) == 0);
}


/*
 *  Write Command Data
 *    Parameters:      cmd:   Command
 *                     val:   Data
 *    Return Value:    None
 */

void WrCmdDat (DWORD cmd, DWORD val) {

  DEV_INT_CLR = CCEMTY_INT;
  CMD_CODE = cmd;
  while ((DEV_INT_STAT & CCEMTY_INT) == 0);
  DEV_INT_CLR = CCEMTY_INT;
  CMD_CODE = val;
  while ((DEV_INT_STAT & CCEMTY_INT) == 0);
}


/*
 *  Read Command Data
 *    Parameters:      cmd:   Command
 *    Return Value:    Data Value
 */

DWORD RdCmdDat (DWORD cmd) {

  DEV_INT_CLR = CCEMTY_INT | CDFULL_INT;
  CMD_CODE = cmd;
  while ((DEV_INT_STAT & CDFULL_INT) == 0);
  return (CMD_DATA);
}


/*
 *  USB Initialize Function
 *   Called by the User to initialize USB
 *    Return Value:    None
 */

void USB_Init (void) {

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

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

  /* Configure 48MHz USB Clock;  FOsc = 12MHz, M = 4, P = 2 */
  PLL48CFG  = 0x23;                         /* M = 4, P = 2 */
  PLL48CON  = PLLCON_PLLE;                  /* PLL Enable */
  PLL48FEED = 0xAA;                         /* Feed Sequence 1 */
  PLL48FEED = 0x55;                         /* Feed Sequence 2 */

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

  PLL48CON  = PLLCON_PLLE | PLLCON_PLLC;    /* PLL Enable & Connect */
  PLL48FEED = 0xAA;                         /* Feed Sequence 1 */
  PLL48FEED = 0x55;                         /* Feed Sequence 2 */

  VICVectAddr0 = (unsigned long)USB_ISR;    /* USB Interrupt -> Vector 0 */
  VICVectCntl0 = 0x20 | 22;                 /* USB Interrupt -> IRQ Slot 0 */
  VICIntEnable = 1 << 22;                   /* Enable USB Interrupt */

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

#if 1 /* Partial Manual Reset since Automatic Bus Reset is not working */
  USB_Reset();
  USB_SetAddress(0);
#endif
}


/*
 *  USB Connect Function
 *   Called by the User to Connect/Disconnect USB
 *    Parameters:      con:   Connect/Disconnect
 *    Return Value:    None
 */

void USB_Connect (BOOL con) {
  WrCmdDat(CMD_SET_DEV_STAT, DAT_WR_BYTE(con ? DEV_CON : 0));
}


/*
 *  USB Reset Function
 *   Called automatically on USB Reset
 *    Return Value:    None
 */

void USB_Reset (void) {
#if USB_DMA
  DWORD n;
#endif

  EP_INDEX = 0;
  MAXPACKET_SIZE = USB_MAX_PACKET0;
  EP_INDEX = 1;
  MAXPACKET_SIZE = USB_MAX_PACKET0;
  while ((DEV_INT_STAT & EP_RLZED_INT) == 0);

  EP_INT_CLR  = 0xFFFFFFFF;
  EP_INT_EN   = 0xFFFFFFFF ^ USB_DMA_EP;
  DEV_INT_CLR = 0xFFFFFFFF;
  DEV_INT_EN  = DEV_STAT_INT    | EP_SLOW_INT    |
               (USB_SOF_EVENT   ? FRAME_INT : 0) |
               (USB_ERROR_EVENT ? ERR_INT   : 0);

#if USB_DMA
  UDCA_HEAD   = USB_RAM_ADR;
  DMA_REQ_CLR = 0xFFFFFFFF;
  EP_DMA_DIS  = 0xFFFFFFFF;
  EP_DMA_EN   = USB_DMA_EP;
  EOT_INT_CLR = 0xFFFFFFFF;
  NDD_REQ_INT_CLR = 0xFFFFFFFF;
  SYS_ERR_INT_CLR = 0xFFFFFFFF;
  DMA_INT_EN  = 0x00000007;
  DDMemMap[0] = 0x00000000;
  DDMemMap[1] = 0x00000000;
  for (n = 0; n < USB_EP_NUM; n++) {
    udca[n] = 0;
    UDCA[n] = 0;
  }
#endif
}


/*
 *  USB Suspend Function
 *   Called automatically on USB Suspend
 *    Return Value:    None
 */

void USB_Suspend (void) {
  /* Performed by Hardware */
}


/*
 *  USB Resume Function
 *   Called automatically on USB Resume
 *    Return Value:    None
 */

void USB_Resume (void) {
  /* Performed by Hardware */
}


/*
 *  USB Remote Wakeup Function
 *   Called automatically on USB Remote Wakeup
 *    Return Value:    None
 */

void USB_WakeUp (void) {

  if (USB_DeviceStatus & USB_GETSTATUS_REMOTE_WAKEUP) {
    WrCmdDat(CMD_SET_DEV_STAT, DAT_WR_BYTE(DEV_CON));
  }
}


/*
 *  USB Remote Wakeup Configuration Function
 *    Parameters:      cfg:   Enable/Disable
 *    Return Value:    None
 */

void USB_WakeUpCfg (BOOL cfg) {
  cfg;  /* Not needed */
}


/*
 *  USB Set Address Function
 *    Parameters:      adr:   USB Address
 *    Return Value:    None
 */

void USB_SetAddress (DWORD adr) {
  WrCmdDat(CMD_SET_ADDR, DAT_WR_BYTE(DEV_EN | adr)); /* Don't wait for next */
  WrCmdDat(CMD_SET_ADDR, DAT_WR_BYTE(DEV_EN | adr)); /*  Setup Status Phase */
}


/*
 *  USB Configure Function
 *    Parameters:      cfg:   Configure/Deconfigure
 *    Return Value:    None
 */

void USB_Configure (BOOL cfg) {

  WrCmdDat(CMD_CFG_DEV, DAT_WR_BYTE(cfg ? CONF_DVICE : 0));

  REALIZE_EP = 0x00000003;
  while ((DEV_INT_STAT & EP_RLZED_INT) == 0);
  DEV_INT_CLR = EP_RLZED_INT;
}


/*
 *  Configure USB Endpoint according to Descriptor
 *    Parameters:      pEPD:  Pointer to Endpoint Descriptor
 *    Return Value:    None
 */

void USB_ConfigEP (USB_ENDPOINT_DESCRIPTOR *pEPD) {
  DWORD num;

  num = EPAdr(pEPD->bEndpointAddress);
  REALIZE_EP |= (1 << num);
  EP_INDEX = num;
  MAXPACKET_SIZE = pEPD->wMaxPacketSize;
  while ((DEV_INT_STAT & EP_RLZED_INT) == 0);
  DEV_INT_CLR = EP_RLZED_INT;
}


/*
 *  Set Direction for USB Control Endpoint
 *    Parameters:      dir:   Out (dir == 0), In (dir <> 0)
 *    Return Value:    None
 */

void USB_DirCtrlEP (DWORD dir) {
  dir;  /* Not needed */
}


/*
 *  Enable USB Endpoint
 *    Parameters:      EPNum: Endpoint Number
 *                       EPNum.0..3: Address
 *                       EPNum.7:    Dir
 *    Return Value:    None
 */

void USB_EnableEP (DWORD EPNum) {
  WrCmdDat(CMD_SET_EP_STAT(EPAdr(EPNum)), DAT_WR_BYTE(0));
}


/*
 *  Disable USB Endpoint
 *    Parameters:      EPNum: Endpoint Number
 *                       EPNum.0..3: Address
 *                       EPNum.7:    Dir
 *    Return Value:    None
 */

void USB_DisableEP (DWORD EPNum) {
  WrCmdDat(CMD_SET_EP_STAT(EPAdr(EPNum)), DAT_WR_BYTE(EP_STAT_DA));
}


/*
 *  Reset USB Endpoint
 *    Parameters:      EPNum: Endpoint Number
 *                       EPNum.0..3: Address
 *                       EPNum.7:    Dir
 *    Return Value:    None
 */

void USB_ResetEP (DWORD EPNum) {
  WrCmdDat(CMD_SET_EP_STAT(EPAdr(EPNum)), DAT_WR_BYTE(0));
}


/*
 *  Set Stall for USB Endpoint
 *    Parameters:      EPNum: Endpoint Number
 *                       EPNum.0..3: Address
 *                       EPNum.7:    Dir
 *    Return Value:    None
 */

void USB_SetStallEP (DWORD EPNum) {
  WrCmdDat(CMD_SET_EP_STAT(EPAdr(EPNum)), DAT_WR_BYTE(EP_STAT_ST));
}


/*
 *  Clear Stall for USB Endpoint
 *    Parameters:      EPNum: Endpoint Number
 *                       EPNum.0..3: Address
 *                       EPNum.7:    Dir
 *    Return Value:    None
 */

void USB_ClrStallEP (DWORD EPNum) {
  WrCmdDat(CMD_SET_EP_STAT(EPAdr(EPNum)), DAT_WR_BYTE(0));
}


/*
 *  Read USB Endpoint Data
 *    Parameters:      EPNum: Endpoint Number
 *                       EPNum.0..3: Address
 *                       EPNum.7:    Dir
 *                     pData: Pointer to Data Buffer
 *    Return Value:    Number of bytes read
 */

DWORD USB_ReadEP (DWORD EPNum, BYTE *pData) {
  DWORD cnt, n;

  USB_CTRL = ((EPNum & 0x0F) << 2) | CTRL_RD_EN;

  do {
    cnt = RX_PLENGTH;
  } while ((cnt & PKT_RDY) == 0);
  cnt &= PKT_LNGTH_MASK;