LUFA/Drivers/Peripheral/SerialStream.h

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2010.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6       www.fourwalledcubicle.com
   7 */
   8
   9 /*
  10   Copyright 2010  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, distribute, and sell this
  13   software and its documentation for any purpose is hereby granted
  14   without fee, provided that the above copyright notice appear in
  15   all copies and that both that the copyright notice and this
  16   permission notice and warranty disclaimer appear in supporting
  17   documentation, and that the name of the author not be used in
  18   advertising or publicity pertaining to distribution of the
  19   software without specific, written prior permission.
  20
  21   The author disclaim all warranties with regard to this
  22   software, including all implied warranties of merchantability
  23   and fitness.  In no event shall the author be liable for any
  24   special, indirect or consequential damages or any damages
  25   whatsoever resulting from loss of use, data or profits, whether
  26   in an action of contract, negligence or other tortious action,
  27   arising out of or in connection with the use or performance of
  28   this software.
  29 */
  30
  31 /** \file
  32  *
  33  *  Serial stream driver for the USART subsystem on supported USB AVRs. This makes use of the functions in the
  34  *  regular USART driver, but allows the avr-libc standard stream functions (printf, puts, etc.) to work with the
  35  *  USART.
  36  **/
  37
  38 /** \ingroup Group_PeripheralDrivers
  39  *  @defgroup Group_SerialStream Serial Stream Driver - LUFA/Drivers/Peripheral/SerialStream.h
  40  *
  41  *  \section Sec_Dependencies Module Source Dependencies
  42  *  The following files must be built with any user project that uses this module:
  43  *    - LUFA/Drivers/Peripheral/SerialStream.c
  44  *
  45  *  \section Module Description
  46  *  Serial stream driver for the USART subsystem on supported USB AVRs. This makes use of the functions in the
  47  *  regular USART driver, but allows the avr-libc standard stream functions (printf, puts, etc.) to work with the
  48  *  USART.
  49  *
  50  *  @{
  51  */
  52
  53 #ifndef __SERIAL_STREAM_H__
  54 #define __SERIAL_STREAM_H__
  55
  56         /* Includes: */
  57                 #include <avr/io.h>
  58                 #include <stdio.h>
  59
  60                 #include "Serial.h"
  61
  62         /* Enable C linkage for C++ Compilers: */
  63                 #if defined(__cplusplus)
  64                         extern "C" {
  65                 #endif
  66
  67         /* Private Interface - For use in library only: */
  68         #if !defined(__DOXYGEN__)
  69                 /* External Variables: */
  70                         extern FILE USARTStream;
  71
  72                 /* Function Prototypes: */
  73                 #if defined(__INCLUDE_FROM_SERIALSTREAM_C)
  74                         static int SerialStream_TxByte(char DataByte, FILE *Stream) ATTR_NON_NULL_PTR_ARG(2);
  75                         static int SerialStream_RxByte(FILE *Stream) ATTR_NON_NULL_PTR_ARG(1);
  76                 #endif
  77         #endif
  78
  79         /* Public Interface - May be used in end-application: */
  80                 /* Inline Functions: */
  81                         /** Initializes the serial stream (and regular USART driver) so that both the stream and regular
  82                          *  USART driver functions can be used. Must be called before any stream or regular USART functions.
  83                          *
  84                          *  \param[in] BaudRate     Baud rate to configure the USART to
  85                          *  \param[in] DoubleSpeed  Enables double speed mode when set, halving the sample time to double the baud rate
  86                          */
  87                         static inline void SerialStream_Init(const uint32_t BaudRate, const bool DoubleSpeed)
  88                         {
  89                                 Serial_Init(BaudRate, DoubleSpeed);
  90
  91                                 stdout = &USARTStream;
  92                                 stdin  = &USARTStream;
  93                         }
  94
  95                         /** Turns off the serial stream (and regular USART driver), disabling and returning used hardware to
  96                          *  their default configuration.
  97                          */
  98                         static inline void SerialStream_ShutDown(void)
  99                         {
 100                                 Serial_ShutDown();
 101                         }
 102
 103         /* Disable C linkage for C++ Compilers: */
 104                 #if defined(__cplusplus)
 105                         }
 106                 #endif
 107
 108 #endif
 109
 110 /** @} */