variable_define.h

用MSP430F149控制普通射频芯片CC1000的双向通信程序（串口、液晶显示）

#define HEADER_SIZE             4           // 4 bytes header 
#define PREAMBLE_LENGTH         10          // Number of bytes of preamble to send */
#define PREAMBLE_REQ            7          /* Number of bits required in addition to */
                                            /* the initial 8 bits for the preamble to be */
                                            /* accepted */
#define DATA_LENGTH             64

#ifdef CRC16
#define CRC_SIZE                2
#else 
#define CRC_SIZE                1
#endif

// 这里TX_BUFFER_SIZE指的是实际要发送的字节长度，所以如果要
// 保证一次最多能发送64个有效数据的话，那么考虑帧头和同步码
// 的长度以及CRC校验码的长度后TX_BUFFER_SIZE的值就是它们四者
// 的总和了
#define TX_BUFFER_SIZE          (DATA_LENGTH+HEADER_SIZE+PREAMBLE_LENGTH+CRC_SIZE)   /* Size (in bytes) of transmit buffer */
// RX_BUFFER_SIZE指的是实际能接收的字节长度，如果我们要保证
// 一次最多能接受64个有效数据的话，那么考虑到数据后还有CRC校
// 验码，所以RX_BUFFER_SIZE的值就应该是64与CRC长度之和了
#define RX_BUFFER_SIZE          (DATA_LENGTH+CRC_SIZE)       /* Size (in bytes) of receive ring-buffer */


#define UI1     0x33		/* First byte of unique identifier */
#define UI2     0xCC		/* Second byte of unique identifier */

#define FALSE   0
#define TRUE    1

#define ON      TRUE
#define OFF     FALSE


// Macros for turning on and off the LEDs
#define SET_RXLED(STATE) \
  if (STATE)    P2OUT &= ~BIT0;  \
  else          P2OUT |= BIT0        

#define SET_TXLED(STATE) \
  if (STATE)    P2OUT &= ~BIT7;  \
  else          P2OUT |= BIT7        
    
//定义键盘按键
#define BUTTON1 (P1IN & BIT0)
#define BUTTON2 (P1IN & BIT1)
#define BUTTON3 (P1IN & BIT2)
#define BUTTON4 (P1IN & BIT3)


// 模块单元地址
extern const unsigned char UnitAddress;

// 发送和接收的移位变量
unsigned char ShiftReg;

// Buffers for transmitted and received data
// These are put into different banks so that they can be as large as possible
// The TX buffer is filled up with data to be sent in the next data packet
// The RX buffer is a ring buffer in which received data is stored waiting to be
// sent to the UART                                
unsigned char TXBuffer[TX_BUFFER_SIZE]; 
unsigned char RXBuffer[RX_BUFFER_SIZE];
// Index pointers for use with buffers 
unsigned char TXBufferIndex;            
unsigned char RXBufferReadIndex;
unsigned char RXBufferWriteIndex; 

// Counter variables
unsigned char PreambleEnd;
unsigned char PreambleNextbit;
unsigned char ByteCounter;
unsigned char BitCounter;

// Contains the total number of bytes to send in TX, including preamble and header
unsigned char BytesToSend;
// The number of bytes of data to receive in RX
unsigned char BytesToReceive;

// State variable stores the current state of the state machine
enum StateType {IDLE_STATE=0,RX_STATE=1,TX_STATE=2} State;

// This variable stores the state to switch to
// It is updated by the interrupt routine, while the main program
// does the actual state switch
volatile enum StateType NextState;

unsigned char LockAverage;
unsigned char UnlockAverage;
unsigned char RecOver;