MSP430寄存器中文注释----串口寄存器

/************************************************************
* USART   串口寄存器"UCTL","UTCTL","URCTL"定义的各个位 可串口1 串口2公用
************************************************************/
/* UCTL  串口控制寄存器*/ 
#define PENA                0x80        /*校验允许位*/
#define PEV                 0x40        /*偶校验   为0时为奇校验*/
#define SPB                 0x20        /*停止位为2 为0时停止位为1*/
#define CHAR                0x10        /*数据位为8位 为0时数据位为7位*/
#define LISTEN              0x08        /*自环模式(发数据同时在把发的数据接收回来)*/
#define SYNC                0x04        /*同步模式  为0异步模式*/
#define MM                  0x02        /*为1时地址位多机协议(异步) 主机模式(同步);为0时线路空闲多机协议(异步) 从机模式(同步)*/
#define SWRST               0x01        /*控制位*/

/* UTCTL 串口发送控制寄存器*/
#define CKPH                0x80        /*时钟相位控制位(只同步方式用)为1时时钟UCLK延时半个周期*/   
#define CKPL                0x40        /*时钟极性控制位 为1时异步与UCLK相反;同步下降延有效*/
#define SSEL1               0x20        /*时钟源选择位:与SSEL0组合为0,1,2,3四种方式*/
#define SSEL0               0x10        /*"0"选择外部时钟,"1"选择辅助时钟,"2","3"选择系统子时钟 */
#define URXSE               0x08        /*接收触发延控制位(只在异步方式下用)*/
#define TXWAKE              0x04        /*多处理器通信传送控制位(只在异步方式下用)*/
#define STC                 0x02        /*外部引脚STE选择位 为0时为4线模式 为1时为3线模式*/
#define TXEPT               0x01        /*发送器空标志*/

/* URCTL 串口接收控制寄存器                同步模式下只用两位:FE和OE*/
#define FE                  0x80         /*帧错标志*/          
#define PE                  0x40         /*校验错标志位*/
#define OE                  0x20         /*溢出标志位*/
#define BRK                 0x10         /*打断检测位*/
#define URXEIE              0x08         /*接收出错中断允许位*/
#define URXWIE              0x04         /*接收唤醒中断允许位*/
#define RXWAKE              0x02         /*接收唤醒检测位*/
#define RXERR               0x01         /*接收错误标志位*/

/************************************************************
* USART 0           串口0寄存器定义
************************************************************/

#define U0CTL_              0x0070  /* UART 0 Control */
sfrb    U0CTL             = U0CTL_;
#define U0TCTL_             0x0071  /* UART 0 Transmit Control */
sfrb    U0TCTL            = U0TCTL_;
#define U0RCTL_             0x0072  /* UART 0 Receive Control */
sfrb    U0RCTL            = U0RCTL_;
#define U0MCTL_             0x0073  /* UART 0 Modulation Control */
sfrb    U0MCTL            = U0MCTL_;
#define U0BR0_              0x0074  /* UART 0 Baud Rate 0 */
sfrb    U0BR0             = U0BR0_;
#define U0BR1_              0x0075  /* UART 0 Baud Rate 1 */
sfrb    U0BR1             = U0BR1_;
#define U0RXBUF_            0x0076  /* UART 0 Receive Buffer */
const sfrb U0RXBUF        = U0RXBUF_;
#define U0TXBUF_            0x0077  /* UART 0 Transmit Buffer */
sfrb    U0TXBUF           = U0TXBUF_;

/* Alternate register names */

#define UCTL0_              0x0070  /* UART 0 Control */
sfrb    UCTL0             = UCTL0_;
#define UTCTL0_             0x0071  /* UART 0 Transmit Control */
sfrb    UTCTL0            = UTCTL0_;
#define URCTL0_             0x0072  /* UART 0 Receive Control */
sfrb    URCTL0            = URCTL0_;
#define UMCTL0_             0x0073  /* UART 0 Modulation Control */
sfrb    UMCTL0            = UMCTL0_;
#define UBR00_              0x0074  /* UART 0 Baud Rate 0 */
sfrb    UBR00             = UBR00_;
#define UBR10_              0x0075  /* UART 0 Baud Rate 1 */
sfrb    UBR10             = UBR10_;
#define RXBUF0_             0x0076  /* UART 0 Receive Buffer */
const sfrb RXBUF0         = RXBUF0_;
#define TXBUF0_             0x0077  /* UART 0 Transmit Buffer */
sfrb    TXBUF0            = TXBUF0_;

#define UCTL_0_             0x0070  /* UART 0 Control */
sfrb    UCTL_0            = UCTL_0_;
#define UTCTL_0_            0x0071  /* UART 0 Transmit Control */
sfrb    UTCTL_0           = UTCTL_0_;
#define URCTL_0_            0x0072  /* UART 0 Receive Control */
sfrb    URCTL_0           = URCTL_0_;
#define UMCTL_0_            0x0073  /* UART 0 Modulation Control */
sfrb    UMCTL_0           = UMCTL_0_;
#define UBR0_0_             0x0074  /* UART 0 Baud Rate 0 */
sfrb    UBR0_0            = UBR0_0_;
#define UBR1_0_             0x0075  /* UART 0 Baud Rate 1 */
sfrb    UBR1_0            = UBR1_0_;
#define RXBUF_0_            0x0076  /* UART 0 Receive Buffer */
const sfrb RXBUF_0        = RXBUF_0_;
#define TXBUF_0_            0x0077  /* UART 0 Transmit Buffer */
sfrb    TXBUF_0           = TXBUF_0_;

/************************************************************
* USART 1         串口1寄存器定义
************************************************************/

#define U1CTL_              0x0078  /* UART 1 Control */
sfrb    U1CTL             = U1CTL_;
#define U1TCTL_             0x0079  /* UART 1 Transmit Control */
sfrb    U1TCTL            = U1TCTL_;
#define U1RCTL_             0x007A  /* UART 1 Receive Control */
sfrb    U1RCTL            = U1RCTL_;
#define U1MCTL_             0x007B  /* UART 1 Modulation Control */
sfrb    U1MCTL            = U1MCTL_;
#define U1BR0_              0x007C  /* UART 1 Baud Rate 0 */
sfrb    U1BR0             = U1BR0_;
#define U1BR1_              0x007D  /* UART 1 Baud Rate 1 */
sfrb    U1BR1             = U1BR1_;
#define U1RXBUF_            0x007E  /* UART 1 Receive Buffer */
const sfrb U1RXBUF        = U1RXBUF_;
#define U1TXBUF_            0x007F  /* UART 1 Transmit Buffer */
sfrb    U1TXBUF           = U1TXBUF_;

#define UCTL1_              0x0078  /* UART 1 Control */
sfrb    UCTL1             = UCTL1_;
#define UTCTL1_             0x0079  /* UART 1 Transmit Control */
sfrb    UTCTL1            = UTCTL1_;
#define URCTL1_             0x007A  /* UART 1 Receive Control */
sfrb    URCTL1            = URCTL1_;
#define UMCTL1_             0x007B  /* UART 1 Modulation Control */
sfrb    UMCTL1            = UMCTL1_;
#define UBR01_               0x007C  /* UART 1 Baud Rate 0 */
sfrb    UBR01             = UBR01_;
#define UBR11_              0x007D  /* UART 1 Baud Rate 1 */
sfrb    UBR11             = UBR11_;
#define RXBUF1_             0x007E  /* UART 1 Receive Buffer */
const sfrb RXBUF1         = RXBUF1_;
#define TXBUF1_             0x007F  /* UART 1 Transmit Buffer */
sfrb    TXBUF1            = TXBUF1_;

#define UCTL_1_             0x0078  /* UART 1 Control */
sfrb    UCTL_1            = UCTL_1_;
#define UTCTL_1_            0x0079  /* UART 1 Transmit Control */
sfrb    UTCTL_1           = UTCTL_1_;
#define URCTL_1_            0x007A  /* UART 1 Receive Control */
sfrb    URCTL_1           = URCTL_1_;
#define UMCTL_1_            0x007B  /* UART 1 Modulation Control */
sfrb    UMCTL_1           = UMCTL_1_;
#define UBR0_1_             0x007C  /* UART 1 Baud Rate 0 */
sfrb    UBR0_1            = UBR0_1_;
#define UBR1_1_             0x007D  /* UART 1 Baud Rate 1 */
sfrb    UBR1_1            = UBR1_1_;
#define RXBUF_1_            0x007E  /* UART 1 Receive Buffer */
const sfrb RXBUF_1        = RXBUF_1_;
#define TXBUF_1_            0x007F  /* UART 1 Transmit Buffer */
sfrb    TXBUF_1           = TXBUF_1_;