fsfw/datalinklayer/BCFrame.h

63 lines
1.7 KiB
C++

/**
* @file BCFrame.h
* @brief This file defines the BCFrame class.
* @date 24.04.2013
* @author baetz
*/
#ifndef BCFRAME_H_
#define BCFRAME_H_
#include "CCSDSReturnValuesIF.h"
/**
* Small helper class to identify a BcFrame.
* @ingroup ccsds_handling
*/
class BcFrame: public CCSDSReturnValuesIF {
private:
static const uint8_t UNLOCK_COMMAND = 0b00000000;//! Identifier for a certain BC Command.
static const uint8_t SET_V_R_1 = 0b10000010;//! Identifier for a certain BC Command.
static const uint8_t SET_V_R_2 = 0b00000000;//! Identifier for a certain BC Command.
public:
uint8_t byte1; //!< First content byte
uint8_t byte2; //!< Second content byte
uint8_t vR; //!< vR byte
/**
* Simple default constructor.
*/
BcFrame() :
byte1(0), byte2(0), vR(0) {
}
/**
* Main and only useful method of the class.
* With the buffer and size information passed, the class passes the content
* and checks if it is one of the two valid BC Command Frames.
* @param inBuffer Content of the frame to check,
* @param inSize Size of the data to check.
* @return - #BC_ILLEGAL_COMMAND if it is no command.
* - #BC_IS_UNLOCK_COMMAND if it is an unlock command.
* - #BC_IS_SET_VR_COMMAND if it is such.
*/
ReturnValue_t initialize(const uint8_t* inBuffer, uint16_t inSize) {
ReturnValue_t returnValue = BC_ILLEGAL_COMMAND;
if (inSize == 1) {
byte1 = inBuffer[0];
if (byte1 == UNLOCK_COMMAND) {
returnValue = BC_IS_UNLOCK_COMMAND;
}
} else if (inSize == 3) {
byte1 = inBuffer[0];
byte2 = inBuffer[1];
vR = inBuffer[2];
if (byte1 == SET_V_R_1 && byte2 == SET_V_R_2) {
returnValue = BC_IS_SET_VR_COMMAND;
}
}
return returnValue;
}
};
#endif /* BCFRAME_H_ */