scc_uart.h

基于vxworks操作系统的电话语音平台系统

#ifndef __SCC_UART_H
#define __SCC_UART_H

/*#include "simple.h"*/

/*
 * transmit BD's
 */
#define T_R     0x8000          /* ready bit */
#define T_W     0x2000          /* wrap bit */
#define T_I     0x1000          /* interrupt on completion */
#define T_CR    0x0800          /* clear to send report */
#define T_A     0x0400          /* address characters in buffer */
#define T_CM    0x0200          /* continuous mode */
#define T_P     0x0100          /* send preamble before data */
#define T_NS    0x0080          /* no stop bit in transmit */

#define T_CT    0x0001          /* error: CTS lost */

#ifndef T_ERROR
#define T_ERROR T_CT
#endif

/*
 * receive BD's
 */
#define R_E     0x8000          /* buffer empty */
#define R_W     0x2000          /* wrap bit */
#define R_I     0x1000          /* interrupt on reception */
#define R_C     0x0800          /* buffer contains control character */
#define R_A     0x0400          /* buffer contains address character */
#define R_CM    0x0200          /* continuous mode */
#define R_ID    0x0100          /* buffer closed due to idles */
#define R_AM    0x0080          /* address match */

#define R_BR    0x0020          /* break character received */
#define R_FR    0x0010          /* framing error */
#define R_PR    0x0008          /* parity error */
#define R_OV    0x0002          /* receive overrun */
#define R_CD    0x0001          /* carrier detect lost */

#ifndef R_ERROR
#define R_ERROR (R_BR | R_FR | R_PR | R_OV | R_CD)
#endif

/*
 * UART Specific PRAM
 */
#define UART_TOSEQ_REA   0x2000
#define UART_TOSEQ_I     0x1000
#define UART_TOSEQ_CT    0x0800
#define UART_TOSEQ_A     0x0100
#define UART_LAST_CHAR   0x8000
#define UART_REJECT_CHAR 0x4000
#define UART_RCCM        (0x00FF | UART_LAST_CHAR | UART_REJECT_CHAR)

/*
 * UART PSMR (Protocol Specific Mode register)
 */
#define UART_PSMR_FLC          0x8000
#define UART_PSMR_SL           0x4000
#define UART_PSMR_CL5          (0x0<<12)
#define UART_PSMR_CL6          (0x1<<12)
#define UART_PSMR_CL7          (0x2<<12)
#define UART_PSMR_CL8          (0x3<<12)
#define UART_PSMR_UM_NORM      (0x0<<10)
#define UART_PSMR_UM_MULT      (0x1<<10)
#define UART_PSMR_UM_MULT_AUTO (0x3<<10)
#define UART_PSMR_FRZ          0x0200
#define UART_PSMR_RZS          0x0100
#define UART_PSMR_SYN          0x0080
#define UART_PSMR_DRT          0x0040
#define UART_PSMR_PEN          0x0010
#define UART_PSMR_RPM_ODD      (0x0<<2)
#define UART_PSMR_RPM_LOW      (0x1<<2)
#define UART_PSMR_RPM_EVEN     (0x2<<2)
#define UART_PSMR_RPM_HIGH     (0x3<<2)
#define UART_PSMR_TPM_ODD      0x0
#define UART_PSMR_TPM_LOW      0x1
#define UART_PSMR_TPM_EVEN     0x2
#define UART_PSMR_TPM_HIGH     0x3

/*
 * uart interrupts
 */
#define UART_GLr        0x1000  /* Glitch on rx */
#define UART_GLt        0x0800  /* Glitch on tx */
#define UART_AB         0x0200  /* Auto band */
#define UART_IDL        0x0100  /* idle sequence status changed */
#define UART_GRA        0x0080  /* Graceful stop complete */
#define UART_BRKe       0x0040  /* break end */
#define UART_BRKs       0x0020  /* break start */
#define UART_CCR        0x0008  /* control character received */
#define UART_BSY        0x0004  /* busy */
#define UART_TX         0x0002  /* transmit buffer */
#define UART_RX         0x0001  /* receive buffer */
#define UART_ERROR      (UART_GLr | UART_GLt | UART_AB)

/*
 * uart specific structure
 */
typedef struct {
	unsigned char reject;	/* reject the character */
	unsigned char ch;	/* control character */
	void     (*user_func)(int); /* pointer to routine associated with the cc */
} CONT_CHAR;
#define NULL_USER_FUNC  ((void (*)(int))0)

typedef enum {
	PARITY_NO, PARITY_ODD, PARITY_LOW, PARITY_EVEN, PARITY_HIGH
} PARITY;

#define CC_MAX          8
typedef struct {
	unsigned short max_frame_length;
	PARITY         parity;      /* Parity control flag. */
	unsigned short data;        /* Number of data bits. */
	unsigned short stop;        /* Number of stop bits. */
	unsigned long  baud;        /* Baud rate */
	unsigned short number_of_cc;/* Number of control character to be handled. */
    CONT_CHAR      cc[CC_MAX];
} UART_SPECIFIC;


#endif