asm.s43

MSP430F22X单片机开发套件源代码

#include "msp430x22x4.h"
#include "Clock_def.h"
;用显波器来观察以下管脚
;并通过修改"Clock_def.h"文件来定义各个时钟
;P1.4---->SMCLK
;p2.0---->ACLK
;P2.1---->SMCLK

;----------------------------------------------------------------------------- 
;       MSP430F22x中断向量表        
;-----------------------------------------------------------------------------      
        ORG     0FFFEh
        DC16    main	
;------------------------------------------------------------------------------ 
        RSEG    CODE                          ;程序开始
;------------------------------------------------------------------------------  
main    MOV.W   #0600H,SP                     ;设置堆栈指针
stopWDT MOV.W	#WDTPW+WDTHOLD,&WDTCTL        ;关看门狗
#if     (DCO_FREQUENCY==1)
	MOV.B	&CALBC1_1MHZ,&BCSCTL1         ;设定DCO为1MHZ
	MOV.B	&CALDCO_1MHZ,&DCOCTL  
#elif  (DCO_FREQUENCY==8)
	MOV.B	&CALBC1_8MHZ,&BCSCTL1         ;设定DCO为1MHZ
	MOV.B	&CALDCO_8MHZ,&DCOCTL
#elif  (DCO_FREQUENCY=12)
	MOV.B	&CALBC1_12MHZ,&BCSCTL1        ;设定DCO为1MHZ
	MOV.B	&CALDCO_12MHZ,&DCOCTL
#elif   (DCO_FREQUENCY=16)
	MOV.B	&CALBC1_16MHZ,&BCSCTL1        ;设定DCO为1MHZ
	MOV.B	&CALDCO_16MHZ,&DCOCTL        
#endif        
      
        BIS.B   #BIT4,&P1SEL                  ;P1.4输出SMCLK
        BIS.B   #BIT4,&P1DIR
        BIS.B   #BIT0+BIT1,P2SEL              ;P2.1输出SMCLK,P2.0输出ACLK
        BIS.B   #BIT0+BIT1,P2DIR
        
#ifdef  ACLK_VLOCLK        
        BIS.B   #LFXT1S1,&BCSCTL3             ;ACLK来源VLO
#endif 

#ifdef  SMCLK_LFC
        BIS.B   #SELS,&BCSCTL2                ;SMCLK来源LFC(LFXT1CLK或VLOCLK由ACLK_VLOCLK决定)
#endif

#ifdef  MCLK_XT2_OR_LFC                       ;MCLK时钟源选择设定
        BIS.B   #SELM1,&BCSCTL2
#endif

mainloop
        JMP     mainloop
        END     main