RTOS_FIFO.h

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#ifndef __FIFO_H__
#define __FIFO_H__
 
 
 #define TXFIFOSIZE 64 // must be a power of 2
 
 
void TxFifo_Init(void);
 
 
int TxFifo_Put(char data);
 
 
char TxFifo_Get(void);
 
 
uint32_t TxFifo_Size(void);
 
 
#define RXFIFOSIZE 16 // must be a power of 2
 
void RxFifo_Init(void);
 
int RxFifo_Put(char data);
 
char RxFifo_Get(void);
 
uint32_t RxFifo_Size(void);
 
 
 
// macro to create an index FIFO
#define AddIndexFifo(NAME,SIZE,TYPE,SUCCESS,FAIL) \
uint32_t volatile NAME ## PutI;         \
uint32_t volatile NAME ## GetI;         \
TYPE static NAME ## Fifo [SIZE];        \
void NAME ## Fifo_Init(void){           \
  NAME ## PutI = NAME ## GetI = 0;      \
}                                       \
int NAME ## Fifo_Put (TYPE data){       \
  if(( NAME ## PutI - NAME ## GetI ) & ~(SIZE-1)){  \
    return(FAIL);                       \
  }                                     \
  NAME ## Fifo[ NAME ## PutI &(SIZE-1)] = data; \
  NAME ## PutI++;                       \
  return(SUCCESS);                      \
}                                       \
int NAME ## Fifo_Get (TYPE *datapt){    \
  if( NAME ## PutI == NAME ## GetI ){   \
    return(FAIL);                       \
  }                                     \
  *datapt = NAME ## Fifo[ NAME ## GetI &(SIZE-1)];  \
  NAME ## GetI++;                       \
  return(SUCCESS);                      \
}                                       \
unsigned short NAME ## Fifo_Size (void){\
 return ((unsigned short)( NAME ## PutI - NAME ## GetI ));  \
}
// e.g.,
// AddIndexFifo(Tx,32,unsigned char, 1,0)
// SIZE must be a power of two
// creates TxFifo_Init() TxFifo_Get() and TxFifo_Put()
 
#endif //  __FIFO_H__