cdcuser.c

keil 下usb转串口

/*----------------------------------------------------------------------------
 *      U S B  -  K e r n e l
 *----------------------------------------------------------------------------
 *      Name:    CDCUSER.c
 *      Purpose: USB Communication Device Class User module 
 *      Version: V1.00
 *----------------------------------------------------------------------------
 *      This file is part of the uVision/ARM development tools.
 *      This software may only be used under the terms of a valid, current,
 *      end user licence from KEIL for a compatible version of KEIL software
 *      development tools. Nothing else gives you the right to use it.
 *
 *      Copyright (c) 2005-2007 Keil Software.
 *---------------------------------------------------------------------------*/

#include <string.h>
#include <LPC23xx.H>                                  /* LPC23xx definitions */

#include "type.h"
#include "usb.h"
#include "usbhw.h"
#include "usbcfg.h"
#include "usbcore.h"
#include "cdc.h"
#include "cdcuser.h"
#include "serial.h"


extern buf_t txBuf;
extern buf_t rxBuf;

BYTE BulkBuf [USB_CDC_BUFSIZE];
BYTE NotificationBuf [10];

CDC_LINE_CODING CDC_LineCoding  = {9600, 0, 0, 8};
WORD            CDC_SerialState = 0x0000;

/*----------------------------------------------------------------------------
  CDC SendEncapsulatedCommand Request Callback
  Called automatically on CDC SEND_ENCAPSULATED_COMMAND Request
  Parameters:   None                          (global SetupPacket and EP0Buf)
  Return Value: TRUE - Success, FALSE - Error
 *---------------------------------------------------------------------------*/
BOOL CDC_SendEncapsulatedCommand (void) {

  return (TRUE);
}


/*----------------------------------------------------------------------------
  CDC GetEncapsulatedResponse Request Callback
  Called automatically on CDC Get_ENCAPSULATED_RESPONSE Request
  Parameters:   None                          (global SetupPacket and EP0Buf)
  Return Value: TRUE - Success, FALSE - Error
 *---------------------------------------------------------------------------*/
BOOL CDC_GetEncapsulatedResponse (void) {

  /* ... add code to handle request */
  return (TRUE);
}


/*----------------------------------------------------------------------------
  CDC SetCommFeature Request Callback
  Called automatically on CDC Set_COMM_FATURE Request
  Parameters:   FeatureSelector
  Return Value: TRUE - Success, FALSE - Error
 *---------------------------------------------------------------------------*/
BOOL CDC_SetCommFeature (WORD wFeatureSelector) {

  /* ... add code to handle request */
  return (TRUE);
}


/*----------------------------------------------------------------------------
  CDC GetCommFeature Request Callback
  Called automatically on CDC Get_COMM_FATURE Request
  Parameters:   FeatureSelector
  Return Value: TRUE - Success, FALSE - Error
 *---------------------------------------------------------------------------*/
BOOL CDC_GetCommFeature (WORD wFeatureSelector) {

  /* ... add code to handle request */
  return (TRUE);
}


/*----------------------------------------------------------------------------
  CDC ClearCommFeature Request Callback
  Called automatically on CDC CLEAR_COMM_FATURE Request
  Parameters:   FeatureSelector
  Return Value: TRUE - Success, FALSE - Error
 *---------------------------------------------------------------------------*/
BOOL CDC_ClearCommFeature (WORD wFeatureSelector) {

  /* ... add code to handle request */
  return (TRUE);
}


/*----------------------------------------------------------------------------
  CDC SetLineCoding Request Callback
  Called automatically on CDC SET_LINE_CODING Request
  Parameters:   none                    (global SetupPacket and EP0Buf)
  Return Value: TRUE - Success, FALSE - Error
 *---------------------------------------------------------------------------*/
BOOL CDC_SetLineCoding (void) {

  CDC_LineCoding.dwDTERate   =   (EP0Buf[0] <<  0)
                               | (EP0Buf[1] <<  8)
                               | (EP0Buf[2] << 16)
                               | (EP0Buf[3] << 24); 
  CDC_LineCoding.bCharFormat =  EP0Buf[4];
  CDC_LineCoding.bParityType =  EP0Buf[5];
  CDC_LineCoding.bDataBits   =  EP0Buf[6];

  ser_SetLineCoding (CDC_LineCoding.dwDTERate,
                     CDC_LineCoding.bDataBits, 
                     CDC_LineCoding.bParityType,
                     CDC_LineCoding.bCharFormat);
    
  return (TRUE);
}


/*----------------------------------------------------------------------------
  CDC GetLineCoding Request Callback
  Called automatically on CDC GET_LINE_CODING Request
  Parameters:   None                         (global SetupPacket and EP0Buf)
  Return Value: TRUE - Success, FALSE - Error
 *---------------------------------------------------------------------------*/
BOOL CDC_GetLineCoding (void) {

  EP0Buf[0] = (CDC_LineCoding.dwDTERate >>  0) & 0xFF;
  EP0Buf[1] = (CDC_LineCoding.dwDTERate >>  8) & 0xFF;
  EP0Buf[2] = (CDC_LineCoding.dwDTERate >> 16) & 0xFF;
  EP0Buf[3] = (CDC_LineCoding.dwDTERate >> 24) & 0xFF;
  EP0Buf[4] =  CDC_LineCoding.bCharFormat;
  EP0Buf[5] =  CDC_LineCoding.bParityType;
  EP0Buf[6] =  CDC_LineCoding.bDataBits;

  return (TRUE);
}


/*----------------------------------------------------------------------------
  CDC SetControlLineState Request Callback
  Called automatically on CDC SET_CONTROL_LINE_STATE Request
  Parameters:   ControlSignalBitmap 
  Return Value: TRUE - Success, FALSE - Error
 *---------------------------------------------------------------------------*/
BOOL CDC_SetControlLineState (WORD wControlSignalBitmap) {

  /* ... add code to handle request */
  return (TRUE);
}


/*----------------------------------------------------------------------------
  CDC SendBreak Request Callback
  Called automatically on CDC Set_COMM_FATURE Request
  Parameters:   0xFFFF  start of Break 
                0x0000  stop  of Break
                0x####  Duration of Break
  Return Value: TRUE - Success, FALSE - Error
 *---------------------------------------------------------------------------*/
BOOL CDC_SendBreak (WORD wDurationOfBreak) {

  /* ... add code to handle request */
  return (TRUE);
}


/*----------------------------------------------------------------------------
  CDC_BulkIn call on DataIn Request
  Parameters:   none
  Return Value: none
 *---------------------------------------------------------------------------*/
void CDC_BulkIn(void) {
  int i, len;
	
  // get bytes from transmit FIFO into intermediate buffer
  for (i = 0; i < SER_BUF_SIZE; i++) {
    if (!buf_Get(&txBuf, (char *)&BulkBuf[i])) {
      break;
    }
  }
  len = i;

  // send over USB
  if (len > 0) {
	USB_WriteEP (CDC_DEP_IN, &BulkBuf[0], len); 
  }
} 


/*----------------------------------------------------------------------------
  CDC_BulkOut call on DataOut Request
  Parameters:   none
  Return Value: none
 *---------------------------------------------------------------------------*/
void CDC_BulkOut(void) {
  int i, len;

  // get data from USB into intermediate buffer
  len = USB_ReadEP(CDC_DEP_OUT, &BulkBuf[0]);

  for (i = 0; i < len; i++) {
    // put into FIFO
    if (!buf_Put(&rxBuf, BulkBuf[i])) {
      // overflow... :(
      break;
    }
  }
}


/*----------------------------------------------------------------------------
  Get the SERIAL_STATE as defined in usbcdc11.pdf, 6.3.5, Table 69.
  Parameters:   none
  Return Value: SerialState as defined in usbcdc11.pdf
 *---------------------------------------------------------------------------*/
WORD CDC_GetSerialState (void) {
  WORD serialState = 0;
  BYTE msr, lsr;

  lsr = ser_GetLSR();
  msr = ser_GetMSR();

  if (msr & 0x80)  serialState |= CDC_SERIAL_STATE_RX_CARRIER;
  if (msr & 0x20)  serialState |= CDC_SERIAL_STATE_TX_CARRIER;
  if (lsr & 0x10)  serialState |= CDC_SERIAL_STATE_BREAK;
  if (msr & 0x40)  serialState |= CDC_SERIAL_STATE_RING;
  if (lsr & 0x08)  serialState |= CDC_SERIAL_STATE_FRAMING;
  if (lsr & 0x04)  serialState |= CDC_SERIAL_STATE_PARITY;
  if (lsr & 0x02)  serialState |= CDC_SERIAL_STATE_OVERRUN;

  return serialState;
}


/*----------------------------------------------------------------------------
  Send the SERIAL_STATE notification as defined in usbcdc11.pdf, 6.3.5.
 *---------------------------------------------------------------------------*/
void CDC_NotificationIn (void) {

  NotificationBuf[0] = 0xA1;                           // bmRequestType
  NotificationBuf[1] = CDC_NOTIFICATION_SERIAL_STATE;  // bNotification (SERIAL_STATE)
  NotificationBuf[2] = 0x00;                           // wValue
  NotificationBuf[3] = 0x00;
  NotificationBuf[4] = 0x00;                           // wIndex (Interface #, LSB first)
  NotificationBuf[5] = 0x00;
  NotificationBuf[6] = 0x02;                           // wLength (Data length = 2 bytes, LSB first)
  NotificationBuf[7] = 0x00; 
  NotificationBuf[8] = (CDC_SerialState >>  0) & 0xFF; // UART State Bitmap (16bits, LSB first)
  NotificationBuf[9] = (CDC_SerialState >>  8) & 0xFF;

  USB_WriteEP (CDC_CEP_IN, &NotificationBuf[0], 10);   // send notification
}