flm01/mote/v2/avr/ctrl.h

144 lines
3.5 KiB
C
Raw Normal View History

//
// ctrl.h : AVR uC code for ctrl buffer initialisation and put/get ops
//
// Copyright (c) 2010 flukso.net
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
// $Id$
#ifndef CTRL_H
#define CTRL_H
#endif
#include <inttypes.h>
#include "buffer.h"
#ifndef CTRL_RX_BUFFER_SIZE
#define CTRL_RX_BUFFER_SIZE 32
#endif
#ifndef CTRL_TX_BUFFER_SIZE
#define CTRL_TX_BUFFER_SIZE 32
#endif
/**
* Initialize the ctrl receive and transmit buffers.
*
* Overrule the default Rx and Tx ctrl buffer size (32 bytes) in the makefile.
*/
void ctrlInit(void);
/**
* Check whether the ctrl Tx buffer is empty.
*
* @return TRUE/FALSE if empty/not empty
*/
uint8_t ctrlTxBufferIsEmpty(void);
/**
* Add a byte to the ctrl Tx buffer's tail.
*
* @param data the byte to be added to the buffer's tail
* @return TRUE/FALSE if byte could/could not be written
*/
uint8_t ctrlAddToTxBuffer(uint8_t data);
/**
* Fetch a byte from the ctrl Tx buffer's head.
*
* @param data pointer where the byte has to be written
* @return TRUE/FALSE if a byte could be fetched/not fetched
*/
uint8_t ctrlGetFromTxBuffer(uint8_t* data);
/**
* Check whether the ctrl Rx buffer is empty.
*
* @return TRUE/FALSE if empty/not empty
*/
uint8_t ctrlRxBufferIsEmpty(void);
/**
* Add a byte to the ctrl Rx buffer.
*
* @param data the byte to be added to the buffer's tail
* @return TRUE/FALSE if empty/not empty
*/
uint8_t ctrlAddToRxBuffer(uint8_t data);
/**
* Fetch a byte from the ctrl Rx buffer's head.
*
* @param data pointer where the byte has to be written
* @return TRUE/FALSE if a byte could be fetched/not fetched
*/
uint8_t ctrlGetFromRxBuffer(uint8_t* data);
/**
* Flush the ctrl Rx buffer.
*
*/
void ctrlFlushRxBuffer(void);
/**
* Flush the ctrl Tx buffer.
*
*/
void ctrlFlushTxBuffer(void);
/**
* Loop all bytes from the ctrl Rx to Tx buffer.
*
*/
void ctrlRxToTxLoop(void);
/**
* Calculate the CRC-8 checksum over the bytes in the buffer.
*
* @param buffer pointer to the buffer containing the data
* @return CRC-8 checksum
*/
uint8_t ctrlCalcCrc8(cBuffer* buffer);
/**
* Decode the message in the ctrl Rx buffer and dispatch to either ctrlCmdGet,
* ctrlCmdSet or ctrlCmdCommit.
*
*/
void ctrlDecode(void);
/**
* Execute the get command with parameters present in the ctrl Rx buffer.
* The command's reply is written to the ctrl Tx buffer.
*
* @param cmd get command issued
*/
void ctrlCmdGet(uint8_t cmd);
/**
* Execute the set command with parameters present in the ctrl Rx buffer.
* The command's reply is written to the ctrl Tx buffer. In case of a set
* command this will typically only be the two-letter command ID issued.
*
* @param cmd set command issued
*/
void ctrlCmdSet(uint8_t cmd);
/**
* Commit all previous changes by writing the datastructures to EEPROM.
*
*/
void ctrlCmdCommit(void);