comm_fw.h

嵌入式软件构件：TMR计时器管理、CLK实时时钟、KEY键盘扫描、LED数码显示、LCD显示、COMM串口通信

/********************************************************************************************************
* Filename   : COMM_FW.H   FOR ARM
* Programmer : Haven
* 描述：　     串行口通信程序
*********************************************************************************************************
*/

/*
*********************************************************************************************************
*                                       CONFIGURATION CONSTANTS
*********************************************************************************************************
*/

/*
*********************************************************************************************************
*                                               CONSTANTS
*********************************************************************************************************
*/

#ifndef  NUL
#define  NUL                 0x00
#endif

#define  COMM1                  1
#define  COMM2                  2
#define  COMM3                  3
#define  COMM4                  4

                                                 /* 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
COMM_EXT INT8U  UART0TxEmpty;
COMM_EXT INT8U  UART1TxEmpty;
COMM_EXT INT8U  UART2TxEmpty;
COMM_EXT INT8U  UART3TxEmpty;

COMM_EXT INT8U    CommRxBufFull;
/*
*********************************************************************************************************
*                                          FUNCTION PROTOTYPES
*********************************************************************************************************
*/
COMM_EXT INT8U    CommGetRxChar(INT8U ch, INT8U *err);
COMM_EXT INT8U    CommGetTxChar(INT8U ch, INT8U *err);
COMM_EXT void     CommInit(void);
COMM_EXT BOOLEAN  CommIsRxEmpty(INT8U ch);
COMM_EXT BOOLEAN  CommIsRxEmptyISR(INT8U ch);
COMM_EXT BOOLEAN  CommIsTxFull(INT8U ch);
COMM_EXT INT8U    CommPutTxChar(INT8U ch, INT8U c);
COMM_EXT void     CommPutRxChar(INT8U ch, INT8U c);
COMM_EXT void     CommClrRxBuf(INT8U ch);