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331 cascade 1 
/****************************************************************************
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 *   Copyright (C) 2009 by Claas Anders "CaScAdE" Rathje                    *
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 *   admiralcascade@gmail.com                                               *
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 *   Project-URL: http://www.mylifesucks.de/oss/c-osd/                      *
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 *                                                                          *
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 *   This program is free software; you can redistribute it and/or modify   *
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 *   it under the terms of the GNU General Public License as published by   *
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 *   the Free Software Foundation; either version 2 of the License.         *
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 *                                                                          *
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 *   This program is distributed in the hope that it will be useful,        *
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 *   but WITHOUT ANY WARRANTY; without even the implied warranty of         *
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 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the          *
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 *   GNU General Public License for more details.                           *
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 *                                                                          *
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 *   You should have received a copy of the GNU General Public License      *
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 *   along with this program; if not, write to the                          *
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 *   Free Software Foundation, Inc.,                                        *
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 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.              *
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 ****************************************************************************/
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#define baud 57600
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#define RXD_BUFFER_LEN          150
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#define TXD_BUFFER_LEN          150
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extern volatile uint8_t rxd_buffer_locked;
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extern volatile uint8_t rxd_buffer[RXD_BUFFER_LEN];
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extern volatile uint8_t txd_buffer[TXD_BUFFER_LEN];
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extern volatile uint8_t ReceivedBytes;
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extern volatile uint8_t *pRxData;
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extern volatile uint8_t RxDataLen;
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/**
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 * init usart1
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 */
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void usart1_init();
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/**
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 * disable the txd pin of usart1
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 */
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void usart1_DisableTXD(void);
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/**
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 * enable the txd pin of usart1
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 */
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void usart1_EnableTXD(void);
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/**
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 * send a <string> throught usart1
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 */
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void usart1_puts(char*);
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/**
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 * transmit interrupt handler
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 * unused
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 */
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ISR(SIG_USART1_DATA);
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/**
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 * receive data through usart1
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 * portions taken and adapted from
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 * http://svn.mikrokopter.de/mikrowebsvn/filedetails.php?repname=FlightCtrl&path=%2Fbranches%2FV0.72p+Code+Redesign+killagreg%2Fuart0.c
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 */
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ISR(SIG_USART1_RECV);
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/**
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 * Decode the recevied Buffer
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 * portions taken and adapted from
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 * http://svn.mikrokopter.de/mikrowebsvn/filedetails.php?repname=FlightCtrl&path=%2Ftags%2FV0.72p%2Fuart.c
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 */
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void Decode64(void);
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/**
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 * request Data through USART in special MK format by adding checksum and
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 * encode data in modified Base64
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 * portions taken and adapted from
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 * http://svn.mikrokopter.de/mikrowebsvn/filedetails.php?repname=FlightCtrl&path=%2Ftags%2FV0.72p%2Fuart.c
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 */
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void sendMKData(unsigned char, unsigned char, unsigned char*, unsigned char);
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/**
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 * short script to directly send a request thorugh usart including en- and disabling it
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 * where <address> is the address of the receipient, <label> is which data set to request
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 * and <ms> represents the milliseconds delay between data
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 */
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void usart1_request_mk_data(uint8_t, char, uint8_t);