adc_slope.s43

msp430的413单片机AD充放电程序

#include  "msp430x41x.h"
#include  "head.h"


	     RSEG    CODE

;-------------------------------------------------------------------------
;MEASURE Subroutine;    Input:  R14 = Sensor or Ref P2.x bit location
;                      Output:  R15 = Sensor or Ref discharge time
;-------------------------------------------------------------------------
MEASURE     
             push   R14
             push   R15
             
INIT_TA 	
	     MOV    #TASSEL1+TACLR,&TACTL          ; MCLK, clear TAR
INIT_CA
	     MOV.B   #CARSEL+CAREF0+CAON,&CACTL1   ; -Comp = 0.25*Vcc -  on
             MOV.B   #P2CA0+CAF,&CACTL2            ; +Comp = P1.6
	
             BIS.B  #02H,F1_INT             ; 置ADC中断（用于中断是否唤醒CPU）
             
             MOV.B  #1,MEASSTAT             ; 置转换状态
             call   #Charge                 
             mov    #REF1, R14              ; R14 = discharge pin 
             call   #Discharge               
             mov    R15,ADCRESULT           ; REF0  discharge time	
             		  
             MOV.B  #2,MEASSTAT             ; 置转换状态
             call   #Charge                 
             mov    #REF0,R14               ; R14 = discharge pin
             call   #Discharge               
             mov    R15,ADCRESULT_2         ; REF1  discharge time			  
     
             MOV.B  #4,MEASSTAT             ; 置转换状态
             call   #Charge                 
             mov    #SENSOR0,R14            ; R14 = discharge pin
             
             call   #Discharge               
             mov    R15,ADCRESULT_4         ; SENSOR0  discharge time			  

             MOV.B  #8H,MEASSTAT            ; 置转换状态 
             call   #Charge                 
             mov    #SENSOR1,R14            ; R14 = discharge pin
             call   #Discharge               
             mov    R15,ADCRESULT_6         ; SENSOR1  discharge time	

	     BIC.B   #CARSEL+CAREF0+CAON,&CACTL1   ;比较器关 ,CARSEL=0     
	     BIC.B   #P2CA0,CACTL2                 ;不连接到外部引脚
	     
             mov    #MC1+TASSEL0+TACLR,&TACTL      ;  clear TAR.  ACLK, 等待接收数据