4e-lpm-uMMT.s43

; low power modes =============================================================

; #define USCIAB0RX_VECTOR    (7 * 2u)  0xFFEE USCI A0/B0 Receive 

PUBLIC lpm_wake

lpm_wake:
        ; BIS.B #BIT0,&021h      ; test: red LED on
        BIC #(GIE+LPM4),0(RSP) ; clear SR on return stack - turn CPU on.        
        RETI

; Z LPM4      --           Enter low power mode 4, wake on RX interrupt.
     HEADERLESS SLEEPMODE4,4,'LPM4',DOCODE
         ; BIC.B #11000000b,IFG1  ; clear interrupt flags first 
         BIS.B #UCA0RXIE,IE2    ; enable RX interrupt 
         ; BIC.B #BIT0,&021h    ; test: red LED off 
         PUSH SR                ; save status 
         BIS #(GIE+LPM4),SR     ; CPU stops here 
         POP SR                 ; restore status 
         BIC.B #UCA0RXIE,IE2    ; disable RX interrupt 
         ; DINT
         ; BIS.B #BIT0,&021h    ; test: red LED on
         NEXT

;U   SLEEP   --       enter low power mode, get out: reset /key, LEDs off first
     HEADER sleep,5,'SLEEP',DOCOLON
        DW XISQUOTE
        DB (sleep1-sleep0)
sleep0: DB 'Sss...'
        EVEN
sleep1: DW ITYPE
        DW SLEEPMODE4 
        DW KEY,DROP,EXIT
; finis