www.pudn.com > ucosii_block.rar > COMMBGND.H

/* 
********************************************************************************************************* 
*                                     Embedded Systems Building Blocks 
*                                  Complete and Ready-to-Use Modules in C 
* 
*                                    Asynchronous Serial Communications 
*                                          Buffered Serial I/O 
*                                     (Foreground/Background Systems) 
* 
*                            (c) Copyright 1999, Jean J. Labrosse, Weston, FL 
*                                           All Rights Reserved 
* 
* Filename   : COMMBGND.H 
* Programmer : Jean J. Labrosse 
********************************************************************************************************* 
*/ 
 
/* 
********************************************************************************************************* 
*                                       CONFIGURATION CONSTANTS 
********************************************************************************************************* 
*/ 
 
#ifndef  CFG_H 
 
#define  COMM_RX_BUF_SIZE     128                /* Number of characters in Rx ring buffer             */ 
#define  COMM_TX_BUF_SIZE     128                /* Number of characters in Tx ring buffer             */ 
 
#endif 
 
/* 
********************************************************************************************************* 
*                                               CONSTANTS 
********************************************************************************************************* 
*/ 
 
#ifndef  NUL 
#define  NUL                 0x00 
#endif 
 
#define  COMM1                  1 
#define  COMM2                  2 
 
                                                 /* ERROR CODES                                        */ 
#define  COMM_NO_ERR            0                /* Function call was successful                       */ 
#define  COMM_BAD_CH            1                /* Invalid communications port channel                */ 
#define  COMM_RX_EMPTY          2                /* Rx buffer is empty, no character available         */ 
#define  COMM_TX_FULL           3                /* Tx buffer is full, could not deposit character     */ 
#define  COMM_TX_EMPTY          4                /* If the Tx buffer is empty.                         */ 
 
 
#ifdef   COMM_GLOBALS 
#define  COMM_EXT 
#else 
#define  COMM_EXT  extern 
#endif 
/*$PAGE*/ 
/* 
********************************************************************************************************* 
*                                          FUNCTION PROTOTYPES 
********************************************************************************************************* 
*/ 
 
INT8U    CommGetChar(INT8U ch, INT8U *err); 
INT8U    CommGetTxChar(INT8U ch, INT8U *err); 
void     CommInit(void); 
BOOLEAN  CommIsEmpty(INT8U ch); 
BOOLEAN  CommIsFull(INT8U ch); 
INT8U    CommPutChar(INT8U ch, INT8U c); 
void     CommPutRxChar(INT8U ch, INT8U c);