adc_idle_wakeup_int.dt

台弯义隆芯片AD采样设计控制实例说明Application of ADC in EM。

;*****************************************************************************
;Function :  MCU in idle mode, use the interrupt mode, and realizing complete conversion to ;awaken ADE3 MCU 
;*****************************************************************************
;AD converter steps to set up :
;1.Set ADE11-ADE0 bit in ADICH and ADICL register.enabling analog input channel
;2. Set ADCR register and select ADC reference voltage
;3.Set ADIS3:ADIS0 bit in ADCR register,chose ad input channel ,set ADCKR1-ADCKR0
;bit in ADCR register pre - ADC clock frequency; AD home ADPD=1 began 
; May need to enable ADC and total suspended
; 4. According to the need for the calibration channel ADC; 
;5. If the need to resort to interrupt function, which set TEST ADIE=1; implementation ENI ;orders; 
;6. ADRUN=1 home ADCR which began AD converter; 
;7. wait for the interruption or ADRUN was purged 0; If AD interruption, money ADIF. 
;8. Preservation conversion results. If so many AD converter, proceed to step 6 

;*****************************************************************************
ADC_LOW    == 0X14                        
ADC_HIGH   == 0X15                        
;
           INCLUDE   "EM78P510.INC"
           ;
           ORG       0X0000
           JMP       RESET
           ;
           ORG       0X0012
           JMP       ADC_INT
ADC_INT:
           BANK      0
           BC        ISR, ADIF
           BANK      3
           MOV       A, RD                ;
           BANK      0
           AND       A, @0X0F
           MOV       ADC_LOW,A
           BANK      3
           SWAPA     RC
           BANK      0           
           MOV       ADC_HIGH, A
           AND       A, @0X0F0
           OR        ADC_LOW, A
           MOV       A, @0X0F
           AND       ADC_HIGH, A
           RETI 
RESET:
           DISI
           CALL      SUB_RINIT
           CALL      SUB_ADJ
           BS        IMR, ADIE
           BC        ISR, ADIF
           ENI
IDLE_SLEP_SET:
           BANK      3
           MOV       A, @0X83             ;selet ADE3,set ADRUN=1
           OR        ADCR, A
           BANK      0                    ;power on ,IDLE model 
           SLEP                           ;enter into IDLE+SLEEP model
           NOP
AD_WAKED_UP:           
           NOP
           NOP
           NOP
           JMP       $
           ;           
SUB_ADJ:
           BANK     3
           BS       ADICH, CALI           ;enable AD calibration
_ADJ_LOOP:           
           BS       ADCR, ADRUN
           JBC      ADCR, ADRUN
           JMP      $-1
           MOV      A, ADDL
           AND      A, @0X0F
           JBS      R3, Z
           JMP      _ADJ_DONE
           MOV      A, ADDH
           JBS      R3, Z
           JMP      _ADJ_DONE
           MOV      A, @0X10
           ADD      ADDL, A
           JMP      _ADJ_LOOP           
_ADJ_DONE:
           BC       ADICH, CALI
           BANK     0
           RET
           ;
SUB_RINIT:
           BANK      3
           MOV       A, @0X0F
           MOV       ADICL, A              ;select ADE0~ ADE3 analog input 
           CLR       ADICH                 ;set  VREFS==VDD
           MOV       A, @0X60
           MOV       ADCR, A               ;selet ADE0,set ADCKR1/ADCKR0=1:0,ADP=1
           BS        EIESL, ADWK           ;enable AD wake up funtion         
           BANK      0
           CLR       ADC_LOW
           CLR       ADC_HIGH
           RET
           ;                  
           END