352 lines
12 KiB
C
352 lines
12 KiB
C
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/*----------------------------------------------------------------------------
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* U S B - K e r n e l
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*----------------------------------------------------------------------------
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* Name: cdcuser.c
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* Purpose: USB Communication Device Class User module
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* Version: V1.10
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*----------------------------------------------------------------------------
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* This software is supplied "AS IS" without any warranties, express,
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* implied or statutory, including but not limited to the implied
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* warranties of fitness for purpose, satisfactory quality and
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* noninfringement. Keil extends you a royalty-free right to reproduce
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* and distribute executable files created using this software for use
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* on NXP Semiconductors LPC microcontroller devices only. Nothing else
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* gives you the right to use this software.
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*
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* Copyright (c) 2009 Keil - An ARM Company. All rights reserved.
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*---------------------------------------------------------------------------*/
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#include "projectconfig.h"
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#include "usb.h"
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#include "usbhw.h"
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#include "usbcfg.h"
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#include "usbcore.h"
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#include "cdc.h"
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#include "cdcuser.h"
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#include "cdc_buf.h"
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// unsigned char BulkBufIn [64]; // Buffer to store USB IN packet
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unsigned char BulkBufOut [64]; // Buffer to store USB OUT packet
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unsigned char NotificationBuf [10];
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CDC_LINE_CODING CDC_LineCoding = {CFG_USBCDC_BAUDRATE, 0, 0, 8};
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unsigned short CDC_SerialState = 0x0000;
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unsigned short CDC_DepInEmpty = 1; // Data IN EP is empty
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/*----------------------------------------------------------------------------
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We need a buffer for incoming data on USB port because USB receives
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much faster than UART transmits
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*---------------------------------------------------------------------------*/
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/* Buffer masks */
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#define CDC_BUF_SIZE (64) // Output buffer in bytes (power 2)
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// large enough for file transfer
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#define CDC_BUF_MASK (CDC_BUF_SIZE-1ul)
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/* Buffer read / write macros */
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#define CDC_BUF_RESET(cdcBuf) (cdcBuf.rdIdx = cdcBuf.wrIdx = 0)
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#define CDC_BUF_WR(cdcBuf, dataIn) (cdcBuf.data[CDC_BUF_MASK & cdcBuf.wrIdx++] = (dataIn))
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#define CDC_BUF_RD(cdcBuf) (cdcBuf.data[CDC_BUF_MASK & cdcBuf.rdIdx++])
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#define CDC_BUF_EMPTY(cdcBuf) (cdcBuf.rdIdx == cdcBuf.wrIdx)
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#define CDC_BUF_FULL(cdcBuf) (cdcBuf.rdIdx == cdcBuf.wrIdx+1)
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#define CDC_BUF_COUNT(cdcBuf) (CDC_BUF_MASK & (cdcBuf.wrIdx - cdcBuf.rdIdx))
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// CDC output buffer
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typedef struct __CDC_BUF_T
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{
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unsigned char data[CDC_BUF_SIZE];
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volatile unsigned int wrIdx;
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volatile unsigned int rdIdx;
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} CDC_BUF_T;
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CDC_BUF_T CDC_OutBuf; // buffer for all CDC Out data
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/*----------------------------------------------------------------------------
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read data from CDC_OutBuf
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*---------------------------------------------------------------------------*/
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int CDC_RdOutBuf (char *buffer, const int *length)
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{
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int bytesToRead, bytesRead;
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/* Read *length bytes, block if *bytes are not avaialable */
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bytesToRead = *length;
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bytesToRead = (bytesToRead < (*length)) ? bytesToRead : (*length);
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bytesRead = bytesToRead;
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// ... add code to check for underrun
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while (bytesToRead--) {
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*buffer++ = CDC_BUF_RD(CDC_OutBuf);
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}
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return (bytesRead);
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}
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/*----------------------------------------------------------------------------
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write data to CDC_OutBuf
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*---------------------------------------------------------------------------*/
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int CDC_WrOutBuf (const char *buffer, int *length)
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{
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int bytesToWrite, bytesWritten;
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// Write *length bytes
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bytesToWrite = *length;
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bytesWritten = bytesToWrite;
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// ... add code to check for overwrite
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while (bytesToWrite) {
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CDC_BUF_WR(CDC_OutBuf, *buffer++); // Copy Data to buffer
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bytesToWrite--;
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}
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return (bytesWritten);
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}
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/*----------------------------------------------------------------------------
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check if character(s) are available at CDC_OutBuf
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*---------------------------------------------------------------------------*/
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int CDC_OutBufAvailChar (int *availChar)
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{
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*availChar = CDC_BUF_COUNT(CDC_OutBuf);
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return (0);
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}
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/* end Buffer handling */
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/*----------------------------------------------------------------------------
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CDC Initialisation
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Initializes the data structures and serial port
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Parameters: None
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Return Value: None
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*---------------------------------------------------------------------------*/
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void CDC_Init (void)
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{
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CDC_DepInEmpty = 1;
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CDC_SerialState = CDC_GetSerialState();
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CDC_BUF_RESET(CDC_OutBuf);
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// Initialise the CDC buffer. This is required to buffer outgoing
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// data (MCU to PC) since data can only be sent 64 bytes per frame
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// with at least 1ms between frames. To see how the buffer is used,
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// see 'puts' in systeminit.c
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cdcBufferInit();
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}
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/*----------------------------------------------------------------------------
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CDC SendEncapsulatedCommand Request Callback
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Called automatically on CDC SEND_ENCAPSULATED_COMMAND Request
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Parameters: None (global SetupPacket and EP0Buf)
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Return Value: TRUE - Success, FALSE - Error
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*---------------------------------------------------------------------------*/
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uint32_t CDC_SendEncapsulatedCommand (void)
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{
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return (TRUE);
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}
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/*----------------------------------------------------------------------------
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CDC GetEncapsulatedResponse Request Callback
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Called automatically on CDC Get_ENCAPSULATED_RESPONSE Request
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Parameters: None (global SetupPacket and EP0Buf)
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Return Value: TRUE - Success, FALSE - Error
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*---------------------------------------------------------------------------*/
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uint32_t CDC_GetEncapsulatedResponse (void)
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{
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/* ... add code to handle request */
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return (TRUE);
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}
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/*----------------------------------------------------------------------------
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CDC SetCommFeature Request Callback
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Called automatically on CDC Set_COMM_FATURE Request
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Parameters: FeatureSelector
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Return Value: TRUE - Success, FALSE - Error
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*---------------------------------------------------------------------------*/
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uint32_t CDC_SetCommFeature (unsigned short wFeatureSelector)
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{
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/* ... add code to handle request */
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return (TRUE);
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}
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/*----------------------------------------------------------------------------
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CDC GetCommFeature Request Callback
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Called automatically on CDC Get_COMM_FATURE Request
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Parameters: FeatureSelector
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Return Value: TRUE - Success, FALSE - Error
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*---------------------------------------------------------------------------*/
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uint32_t CDC_GetCommFeature (unsigned short wFeatureSelector)
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{
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/* ... add code to handle request */
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return (TRUE);
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}
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/*----------------------------------------------------------------------------
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CDC ClearCommFeature Request Callback
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Called automatically on CDC CLEAR_COMM_FATURE Request
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Parameters: FeatureSelector
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Return Value: TRUE - Success, FALSE - Error
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*---------------------------------------------------------------------------*/
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uint32_t CDC_ClearCommFeature (unsigned short wFeatureSelector)
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{
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/* ... add code to handle request */
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return (TRUE);
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}
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/*----------------------------------------------------------------------------
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CDC SetLineCoding Request Callback
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Called automatically on CDC SET_LINE_CODING Request
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Parameters: none (global SetupPacket and EP0Buf)
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Return Value: TRUE - Success, FALSE - Error
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*---------------------------------------------------------------------------*/
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uint32_t CDC_SetLineCoding (void)
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{
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CDC_LineCoding.dwDTERate = (EP0Buf[0] << 0)
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| (EP0Buf[1] << 8)
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| (EP0Buf[2] << 16)
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| (EP0Buf[3] << 24);
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CDC_LineCoding.bCharFormat = EP0Buf[4];
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CDC_LineCoding.bParityType = EP0Buf[5];
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CDC_LineCoding.bDataBits = EP0Buf[6];
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return (TRUE);
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}
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/*----------------------------------------------------------------------------
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CDC GetLineCoding Request Callback
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Called automatically on CDC GET_LINE_CODING Request
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Parameters: None (global SetupPacket and EP0Buf)
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Return Value: TRUE - Success, FALSE - Error
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*---------------------------------------------------------------------------*/
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uint32_t CDC_GetLineCoding (void)
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{
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EP0Buf[0] = (CDC_LineCoding.dwDTERate >> 0) & 0xFF;
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EP0Buf[1] = (CDC_LineCoding.dwDTERate >> 8) & 0xFF;
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EP0Buf[2] = (CDC_LineCoding.dwDTERate >> 16) & 0xFF;
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EP0Buf[3] = (CDC_LineCoding.dwDTERate >> 24) & 0xFF;
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EP0Buf[4] = CDC_LineCoding.bCharFormat;
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EP0Buf[5] = CDC_LineCoding.bParityType;
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EP0Buf[6] = CDC_LineCoding.bDataBits;
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return (TRUE);
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}
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/*----------------------------------------------------------------------------
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CDC SetControlLineState Request Callback
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Called automatically on CDC SET_CONTROL_LINE_STATE Request
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Parameters: ControlSignalBitmap
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Return Value: TRUE - Success, FALSE - Error
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*---------------------------------------------------------------------------*/
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uint32_t CDC_SetControlLineState (unsigned short wControlSignalBitmap) {
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/* ... add code to handle request */
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return (TRUE);
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}
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/*----------------------------------------------------------------------------
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CDC SendBreak Request Callback
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Called automatically on CDC Set_COMM_FATURE Request
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Parameters: 0xFFFF start of Break
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0x0000 stop of Break
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0x#### Duration of Break
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Return Value: TRUE - Success, FALSE - Error
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*---------------------------------------------------------------------------*/
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uint32_t CDC_SendBreak (unsigned short wDurationOfBreak) {
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/* ... add code to handle request */
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return (TRUE);
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}
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/*----------------------------------------------------------------------------
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CDC_BulkIn call on DataIn Request
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Parameters: none
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Return Value: none
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*---------------------------------------------------------------------------*/
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void CDC_BulkIn(void)
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{
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// int numBytesRead, numBytesAvail;
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//
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// // ToDo: Modify BulkIn to send incoming data to USB
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//
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// ser_AvailChar (&numBytesAvail);
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//
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// // ... add code to check for overwrite
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//
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// numBytesRead = ser_Read ((char *)&BulkBufIn[0], &numBytesAvail);
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//
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// // send over USB
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// if (numBytesRead > 0) {
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// USB_WriteEP (CDC_DEP_IN, &BulkBufIn[0], numBytesRead);
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// }
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// else {
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// CDC_DepInEmpty = 1;
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// }
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//
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//
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}
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/*----------------------------------------------------------------------------
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CDC_BulkOut call on DataOut Request
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Parameters: none
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Return Value: none
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*---------------------------------------------------------------------------*/
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void CDC_BulkOut(void)
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{
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int numBytesRead;
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// get data from USB into intermediate buffer
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numBytesRead = USB_ReadEP(CDC_DEP_OUT, &BulkBufOut[0]);
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// ... add code to check for overwrite
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// store data in a buffer to transmit it over serial interface
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CDC_WrOutBuf ((char *)&BulkBufOut[0], &numBytesRead);
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}
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/*----------------------------------------------------------------------------
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Get the SERIAL_STATE as defined in usbcdc11.pdf, 6.3.5, Table 69.
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Parameters: none
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Return Value: SerialState as defined in usbcdc11.pdf
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*---------------------------------------------------------------------------*/
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unsigned short CDC_GetSerialState (void)
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{
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CDC_SerialState = 0;
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return (CDC_SerialState);
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}
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/*----------------------------------------------------------------------------
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Send the SERIAL_STATE notification as defined in usbcdc11.pdf, 6.3.5.
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*---------------------------------------------------------------------------*/
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void CDC_NotificationIn (void)
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{
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NotificationBuf[0] = 0xA1; // bmRequestType
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NotificationBuf[1] = CDC_NOTIFICATION_SERIAL_STATE; // bNotification (SERIAL_STATE)
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NotificationBuf[2] = 0x00; // wValue
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NotificationBuf[3] = 0x00;
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NotificationBuf[4] = 0x00; // wIndex (Interface #, LSB first)
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NotificationBuf[5] = 0x00;
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NotificationBuf[6] = 0x02; // wLength (Data length = 2 bytes, LSB first)
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NotificationBuf[7] = 0x00;
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NotificationBuf[8] = (CDC_SerialState >> 0) & 0xFF; // UART State Bitmap (16bits, LSB first)
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NotificationBuf[9] = (CDC_SerialState >> 8) & 0xFF;
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USB_WriteEP (CDC_CEP_IN, &NotificationBuf[0], 10); // send notification
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}
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