cdcuser.c

00001 /*----------------------------------------------------------------------------
00002  *      U S B  -  K e r n e l
00003  *----------------------------------------------------------------------------
00004  *      Name:    cdcuser.c
00005  *      Purpose: USB Communication Device Class User module 
00006  *      Version: V1.10
00007  *----------------------------------------------------------------------------
00008 *      This software is supplied "AS IS" without any warranties, express,
00009  *      implied or statutory, including but not limited to the implied
00010  *      warranties of fitness for purpose, satisfactory quality and
00011  *      noninfringement. Keil extends you a royalty-free right to reproduce
00012  *      and distribute executable files created using this software for use
00013  *      on NXP Semiconductors LPC microcontroller devices only. Nothing else 
00014  *      gives you the right to use this software.
00015  *
00016  * Copyright (c) 2009 Keil - An ARM Company. All rights reserved.
00017  *---------------------------------------------------------------------------*/
00018 
00019 #include "type.h"
00020 
00021 #include "usb.h"
00022 #include "usbhw.h"
00023 #include "usbcfg.h"
00024 #include "usbcore.h"
00025 #include "cdc.h"
00026 #include "cdcuser.h"
00027 #include "serial.h"
00028 
00029 
00030 unsigned char BulkBufIn  [USB_CDC_BUFSIZE];            // Buffer to store USB IN  packet
00031 unsigned char BulkBufOut [USB_CDC_BUFSIZE];            // Buffer to store USB OUT packet
00032 unsigned char NotificationBuf [10];
00033 
00034 CDC_LINE_CODING CDC_LineCoding  = {9600, 0, 0, 8};
00035 unsigned short  CDC_SerialState = 0x0000;
00036 unsigned short  CDC_DepInEmpty  = 1;                   // Data IN EP is empty
00037 
00038 /*----------------------------------------------------------------------------
00039   We need a buffer for incomming data on USB port because USB receives
00040   much faster than  UART transmits
00041  *---------------------------------------------------------------------------*/
00042 /* Buffer masks */
00043 #define CDC_BUF_SIZE               (64)               // Output buffer in bytes (power 2)
00044                                                        // large enough for file transfer
00045 #define CDC_BUF_MASK               (CDC_BUF_SIZE-1ul)
00046 
00047 /* Buffer read / write macros */
00048 #define CDC_BUF_RESET(cdcBuf)      (cdcBuf.rdIdx = cdcBuf.wrIdx = 0)
00049 #define CDC_BUF_WR(cdcBuf, dataIn) (cdcBuf.data[CDC_BUF_MASK & cdcBuf.wrIdx++] = (dataIn))
00050 #define CDC_BUF_RD(cdcBuf)         (cdcBuf.data[CDC_BUF_MASK & cdcBuf.rdIdx++])   
00051 #define CDC_BUF_EMPTY(cdcBuf)      (cdcBuf.rdIdx == cdcBuf.wrIdx)
00052 #define CDC_BUF_FULL(cdcBuf)       (cdcBuf.rdIdx == cdcBuf.wrIdx+1)
00053 #define CDC_BUF_COUNT(cdcBuf)      (CDC_BUF_MASK & (cdcBuf.wrIdx - cdcBuf.rdIdx))
00054 
00055 
00056 // CDC output buffer
00057 typedef struct __CDC_BUF_T {
00058   unsigned char data[CDC_BUF_SIZE];
00059   unsigned int wrIdx;
00060   unsigned int rdIdx;
00061 } CDC_BUF_T;
00062 
00063 CDC_BUF_T  CDC_OutBuf;                                 // buffer for all CDC Out data
00064 
00065 /*----------------------------------------------------------------------------
00066   read data from CDC_OutBuf
00067  *---------------------------------------------------------------------------*/
00068 int CDC_RdOutBuf (char *buffer, const int *length) {
00069   int bytesToRead, bytesRead;
00070   
00071   /* Read *length bytes, block if *bytes are not avaialable */
00072   bytesToRead = *length;
00073   bytesToRead = (bytesToRead < (*length)) ? bytesToRead : (*length);
00074   bytesRead = bytesToRead;
00075 
00076 
00077   // ... add code to check for underrun
00078 
00079   while (bytesToRead--) {
00080     *buffer++ = CDC_BUF_RD(CDC_OutBuf);
00081   }
00082   return (bytesRead);  
00083 }
00084 
00085 /*----------------------------------------------------------------------------
00086   write data to CDC_OutBuf
00087  *---------------------------------------------------------------------------*/
00088 int CDC_WrOutBuf (const char *buffer, int *length) {
00089   int bytesToWrite, bytesWritten;
00090 
00091   // Write *length bytes
00092   bytesToWrite = *length;
00093   bytesWritten = bytesToWrite;
00094 
00095 
00096   // ... add code to check for overwrite
00097 
00098   while (bytesToWrite) {
00099       CDC_BUF_WR(CDC_OutBuf, *buffer++);           // Copy Data to buffer  
00100       bytesToWrite--;
00101   }     
00102 
00103   return (bytesWritten); 
00104 }
00105 
00106 /*----------------------------------------------------------------------------
00107   check if character(s) are available at CDC_OutBuf
00108  *---------------------------------------------------------------------------*/
00109 int CDC_OutBufAvailChar (int *availChar) {
00110 
00111   *availChar = CDC_BUF_COUNT(CDC_OutBuf);
00112 
00113   return (0);
00114 }
00115 /* end Buffer handling */
00116 
00117 
00118 /*----------------------------------------------------------------------------
00119   CDC Initialisation
00120   Initializes the data structures and serial port
00121   Parameters:   None 
00122   Return Value: None
00123  *---------------------------------------------------------------------------*/
00124 void CDC_Init (char portNum ) {
00125 
00126   if ( portNum == 0 )
00127   {
00128     ser_OpenPort (0);
00129     ser_InitPort0 (CDC_LineCoding.dwDTERate,
00130                 CDC_LineCoding.bDataBits, 
00131                 CDC_LineCoding.bParityType,
00132                 CDC_LineCoding.bCharFormat);
00133   }
00134   else
00135   {
00136     ser_OpenPort (1);
00137     ser_InitPort1 (CDC_LineCoding.dwDTERate,
00138                 CDC_LineCoding.bDataBits, 
00139                 CDC_LineCoding.bParityType,
00140                 CDC_LineCoding.bCharFormat);
00141   }
00142   CDC_DepInEmpty  = 1;
00143   CDC_SerialState = CDC_GetSerialState();
00144 
00145   CDC_BUF_RESET(CDC_OutBuf);
00146 }
00147 
00148 
00149 /*----------------------------------------------------------------------------
00150   CDC SendEncapsulatedCommand Request Callback
00151   Called automatically on CDC SEND_ENCAPSULATED_COMMAND Request
00152   Parameters:   None                          (global SetupPacket and EP0Buf)
00153   Return Value: TRUE - Success, FALSE - Error
00154  *---------------------------------------------------------------------------*/
00155 uint32_t CDC_SendEncapsulatedCommand (void) {
00156 
00157   return (TRUE);
00158 }
00159 
00160 
00161 /*----------------------------------------------------------------------------
00162   CDC GetEncapsulatedResponse Request Callback
00163   Called automatically on CDC Get_ENCAPSULATED_RESPONSE Request
00164   Parameters:   None                          (global SetupPacket and EP0Buf)
00165   Return Value: TRUE - Success, FALSE - Error
00166  *---------------------------------------------------------------------------*/
00167 uint32_t CDC_GetEncapsulatedResponse (void) {
00168 
00169   /* ... add code to handle request */
00170   return (TRUE);
00171 }
00172 
00173 
00174 /*----------------------------------------------------------------------------
00175   CDC SetCommFeature Request Callback
00176   Called automatically on CDC Set_COMM_FATURE Request
00177   Parameters:   FeatureSelector
00178   Return Value: TRUE - Success, FALSE - Error
00179  *---------------------------------------------------------------------------*/
00180 uint32_t CDC_SetCommFeature (unsigned short wFeatureSelector) {
00181 
00182   /* ... add code to handle request */
00183   return (TRUE);
00184 }
00185 
00186 
00187 /*----------------------------------------------------------------------------
00188   CDC GetCommFeature Request Callback
00189   Called automatically on CDC Get_COMM_FATURE Request
00190   Parameters:   FeatureSelector
00191   Return Value: TRUE - Success, FALSE - Error
00192  *---------------------------------------------------------------------------*/
00193 uint32_t CDC_GetCommFeature (unsigned short wFeatureSelector) {
00194 
00195   /* ... add code to handle request */
00196   return (TRUE);
00197 }
00198 
00199 
00200 /*----------------------------------------------------------------------------
00201   CDC ClearCommFeature Request Callback
00202   Called automatically on CDC CLEAR_COMM_FATURE Request
00203   Parameters:   FeatureSelector
00204   Return Value: TRUE - Success, FALSE - Error
00205  *---------------------------------------------------------------------------*/
00206 uint32_t CDC_ClearCommFeature (unsigned short wFeatureSelector) {
00207 
00208   /* ... add code to handle request */
00209   return (TRUE);
00210 }
00211 
00212 
00213 /*----------------------------------------------------------------------------
00214   CDC SetLineCoding Request Callback
00215   Called automatically on CDC SET_LINE_CODING Request
00216   Parameters:   none                    (global SetupPacket and EP0Buf)
00217   Return Value: TRUE - Success, FALSE - Error
00218  *---------------------------------------------------------------------------*/
00219 uint32_t CDC_SetLineCoding (void) {
00220 
00221   CDC_LineCoding.dwDTERate   =   (EP0Buf[0] <<  0)
00222                                | (EP0Buf[1] <<  8)
00223                                | (EP0Buf[2] << 16)
00224                                | (EP0Buf[3] << 24); 
00225   CDC_LineCoding.bCharFormat =  EP0Buf[4];
00226   CDC_LineCoding.bParityType =  EP0Buf[5];
00227   CDC_LineCoding.bDataBits   =  EP0Buf[6];
00228 
00229 #if PORT_NUM
00230   ser_ClosePort(1);
00231   ser_OpenPort (1);
00232   ser_InitPort1 (CDC_LineCoding.dwDTERate,
00233                 CDC_LineCoding.bDataBits, 
00234                 CDC_LineCoding.bParityType,
00235                 CDC_LineCoding.bCharFormat);
00236 #else
00237   ser_ClosePort(0);
00238   ser_OpenPort (0);
00239   ser_InitPort0 (CDC_LineCoding.dwDTERate,
00240                 CDC_LineCoding.bDataBits, 
00241                 CDC_LineCoding.bParityType,
00242                 CDC_LineCoding.bCharFormat);
00243 #endif    
00244   return (TRUE);
00245 }
00246 
00247 
00248 /*----------------------------------------------------------------------------
00249   CDC GetLineCoding Request Callback
00250   Called automatically on CDC GET_LINE_CODING Request
00251   Parameters:   None                         (global SetupPacket and EP0Buf)
00252   Return Value: TRUE - Success, FALSE - Error
00253  *---------------------------------------------------------------------------*/
00254 uint32_t CDC_GetLineCoding (void) {
00255 
00256   EP0Buf[0] = (CDC_LineCoding.dwDTERate >>  0) & 0xFF;
00257   EP0Buf[1] = (CDC_LineCoding.dwDTERate >>  8) & 0xFF;
00258   EP0Buf[2] = (CDC_LineCoding.dwDTERate >> 16) & 0xFF;
00259   EP0Buf[3] = (CDC_LineCoding.dwDTERate >> 24) & 0xFF;
00260   EP0Buf[4] =  CDC_LineCoding.bCharFormat;
00261   EP0Buf[5] =  CDC_LineCoding.bParityType;
00262   EP0Buf[6] =  CDC_LineCoding.bDataBits;
00263 
00264   return (TRUE);
00265 }
00266 
00267 
00268 /*----------------------------------------------------------------------------
00269   CDC SetControlLineState Request Callback
00270   Called automatically on CDC SET_CONTROL_LINE_STATE Request
00271   Parameters:   ControlSignalBitmap 
00272   Return Value: TRUE - Success, FALSE - Error
00273  *---------------------------------------------------------------------------*/
00274 uint32_t CDC_SetControlLineState (unsigned short wControlSignalBitmap) {
00275 
00276   /* ... add code to handle request */
00277   return (TRUE);
00278 }
00279 
00280 
00281 /*----------------------------------------------------------------------------
00282   CDC SendBreak Request Callback
00283   Called automatically on CDC Set_COMM_FATURE Request
00284   Parameters:   0xFFFF  start of Break 
00285                 0x0000  stop  of Break
00286                 0x####  Duration of Break
00287   Return Value: TRUE - Success, FALSE - Error
00288  *---------------------------------------------------------------------------*/
00289 uint32_t CDC_SendBreak (unsigned short wDurationOfBreak) {
00290 
00291   /* ... add code to handle request */
00292   return (TRUE);
00293 }
00294 
00295 
00296 /*----------------------------------------------------------------------------
00297   CDC_BulkIn call on DataIn Request
00298   Parameters:   none
00299   Return Value: none
00300  *---------------------------------------------------------------------------*/
00301 void CDC_BulkIn(void) {
00302   int numBytesRead, numBytesAvail;
00303     
00304   ser_AvailChar (&numBytesAvail);
00305 
00306   // ... add code to check for overwrite
00307 
00308   numBytesRead = ser_Read ((char *)&BulkBufIn[0], &numBytesAvail);
00309 
00310   // send over USB
00311   if (numBytesRead > 0) {
00312     USB_WriteEP (CDC_DEP_IN, &BulkBufIn[0], numBytesRead);
00313   }
00314   else {
00315     CDC_DepInEmpty = 1;
00316   }
00317 } 
00318 
00319 
00320 /*----------------------------------------------------------------------------
00321   CDC_BulkOut call on DataOut Request
00322   Parameters:   none
00323   Return Value: none
00324  *---------------------------------------------------------------------------*/
00325 void CDC_BulkOut(void) {
00326   int numBytesRead;
00327 
00328   // get data from USB into intermediate buffer
00329   numBytesRead = USB_ReadEP(CDC_DEP_OUT, &BulkBufOut[0]);
00330 
00331   // ... add code to check for overwrite
00332 
00333   // store data in a buffer to transmit it over serial interface
00334   CDC_WrOutBuf ((char *)&BulkBufOut[0], &numBytesRead);
00335 
00336 }
00337 
00338 
00339 /*----------------------------------------------------------------------------
00340   Get the SERIAL_STATE as defined in usbcdc11.pdf, 6.3.5, Table 69.
00341   Parameters:   none
00342   Return Value: SerialState as defined in usbcdc11.pdf
00343  *---------------------------------------------------------------------------*/
00344 unsigned short CDC_GetSerialState (void) {
00345   unsigned short temp;
00346 
00347   CDC_SerialState = 0;
00348   ser_LineState (&temp);
00349 
00350   if (temp & 0x8000)  CDC_SerialState |= CDC_SERIAL_STATE_RX_CARRIER;
00351   if (temp & 0x2000)  CDC_SerialState |= CDC_SERIAL_STATE_TX_CARRIER;
00352   if (temp & 0x0010)  CDC_SerialState |= CDC_SERIAL_STATE_BREAK;
00353   if (temp & 0x4000)  CDC_SerialState |= CDC_SERIAL_STATE_RING;
00354   if (temp & 0x0008)  CDC_SerialState |= CDC_SERIAL_STATE_FRAMING;
00355   if (temp & 0x0004)  CDC_SerialState |= CDC_SERIAL_STATE_PARITY;
00356   if (temp & 0x0002)  CDC_SerialState |= CDC_SERIAL_STATE_OVERRUN;
00357 
00358   return (CDC_SerialState);
00359 }
00360 
00361 
00362 /*----------------------------------------------------------------------------
00363   Send the SERIAL_STATE notification as defined in usbcdc11.pdf, 6.3.5.
00364  *---------------------------------------------------------------------------*/
00365 void CDC_NotificationIn (void) {
00366 
00367   NotificationBuf[0] = 0xA1;                           // bmRequestType
00368   NotificationBuf[1] = CDC_NOTIFICATION_SERIAL_STATE;  // bNotification (SERIAL_STATE)
00369   NotificationBuf[2] = 0x00;                           // wValue
00370   NotificationBuf[3] = 0x00;
00371   NotificationBuf[4] = 0x00;                           // wIndex (Interface #, LSB first)
00372   NotificationBuf[5] = 0x00;
00373   NotificationBuf[6] = 0x02;                           // wLength (Data length = 2 bytes, LSB first)
00374   NotificationBuf[7] = 0x00; 
00375   NotificationBuf[8] = (CDC_SerialState >>  0) & 0xFF; // UART State Bitmap (16bits, LSB first)
00376   NotificationBuf[9] = (CDC_SerialState >>  8) & 0xFF;
00377 
00378   USB_WriteEP (CDC_CEP_IN, &NotificationBuf[0], 10);   // send notification
00379 }