example_lpm3_aclk.s43

MSP 430 timer_uart,tmA3的片子可直接使用模块

;******************************************************************************
;  MSP430x11x1 Demo - Timer_A, LPM3, UART 4800 Echo, 32kHz ACLK
;  Description: TX is called in ISR, ACLK drives Timer_A and remains on in LPM3
;
;  L. Westlund
;  Texas Instruments Inc.
;  Feb 2006
;  Built with IAR Embedded Workbench Version: 3.40
;*****************************************************************************
#include  <msp430x11x1.h>
EXTERN    TI_initTimer
EXTERN    TI_TX_Byte
EXTERN    TI_RXData
EXTERN    TI_TA_UART_StatusFlags
#define   TI_TA_TX_READY    0x01
#define   TI_TA_RX_RECEIVED 0x02
;------------------------------------------------------------------------------
            RSEG    CSTACK                  ; Define stack segment
;------------------------------------------------------------------------------
            RSEG    CODE
;------------------------------------------------------------------------------
RESET       mov.w   #SFE(CSTACK),  SP       ; Initialize stackpointer
StopWDT     mov.w   #WDTPW+WDTHOLD,&WDTCTL  ; Stop WDT
            mov.w   #callBack,     R12      ; move function ptr, 1st param
            mov.w   #0x07,         R14      ; Bitime for 4800, 2nd param
            push.w  #TASSEL_1               ; Select Clock Source, 3rd param
            call    #TI_initTimer
            add.w   #0x02,         SP       ; cleanup from parameters
Mainloop    bis.w   #LPM3+GIE,     SR       ; Enter LPM3, enable interrupts

callBack
            bic.b   #TI_TA_RX_RECEIVED, &TI_TA_UART_StatusFlags
            call    #TI_TX_Byte
            mov.w   #0x00,         R12      ; return 1 to exit LPM3
            ret
;------------------------------------------------------------------------------
;           Interrupt Vectors
            COMMON  INTVEC
;------------------------------------------------------------------------------
            ORG     RESET_VECTOR            ; MSP430 RESET Vector
            DW      RESET                   ;
            END