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Compiler/MSP430FR2111: An example code for the comparator /assembly

Wade Zhang
Intellectual 725 points
Part Number: MSP430FR2111

Tool/software: TI C/C++ Compiler

Dear All，

I need a comparator example code  written in assembly. MCU is msp430fr2111.

  • 0
    Guru 243910 points
    The example code package has msp430fr211x_eCOMP_01.asm/.s43.
  • 0 in reply to Clemens Ladisch
    Intellectual 725 points
    Hi Clemens，
    Sorry,I missed something.
    The code I need is waking up the MCU with a comparator interrupt.
  • 0 in reply to Wade Zhang
    Guru 243910 points
    The CPU automatically wakes up when an interrupt handler is to be executed.

    For how to configure the registers, see msp430fr211x_eCOMP_03.c. For how to write an interrupt handler, see msp430fr211x_WDT_01.asm/.s43.
  • 0 in reply to Clemens Ladisch
    Intellectual 725 points

    Hi Clemens,

      • I wrote it with reference to this example code by assembly,but it can't be used.Can you help me to correct it?

      SetREF      mov.b   #PMMPW_H,&PMMCTL0_H      ; Unlock the PMM registers
                  bis.w   #INTREFEN,&PMMCTL2       ; Enable internal reference
      PollREF     bit.w   #REFGENRDY,&PMMCTL2      ; Poll till internal reference settles
                  jz      PollREF

                   mov.w   #CPPSEL0+CPNSEL1+CPNSEL2+CPPEN+CPNEN, &CPCTL0
                                                  ; Select C1 as input for V+ terminal
                                                  ; Select DAC as input for V- terminal
                                                  ; Enable eCOMP input
                  bis.w    #CPIIE + CPIE, &CPCTL1
                  bis.w    #CPDACREFS + CPDACEN, &CPDACCTL
                  bis.w    #0x2b, &CPDACDATA
                  bis.w    #CPEN, &CPCTL1
      sleep   
                  clr.w    &CPINT
                  nop
                  bis.w    #LPM3 + GIE, SR    
                  nop
                  jmp    sleep
                  
                  
                  
                  
                  
      ecomp_interrupt_service_function    ;      Comparative interrupt function


      ;============================================
                  add.w    &CPIV,    PC
                  reti
                  jmp    wf1_interrupt_pending
                  jmp    wf2_interrupt_pending
                  
                  
      wf1_interrupt_pending
                  bis.b    #BIT2, &P1DIR
                  bic.b    #BIT0, &P2DIR                                                    ; Comparator output off
                  bic.b    #BIT2, &P1DIR
                  bis.w    #CPIE, &CPCTL1                                                    ; Close comparative interrupt
                  bic.w    #LPM3 + GIE, 0(SP)                                                ; Modify stack areas (wake up)
                  reti


      wf2_interrupt_pending
                  bis.b    #BIT2, &P1DIR
                  bic.b    #BIT0, &P2DIR                                                    ; Comparator output off
                  bic.b    #BIT2, &P1DIR
                  bis.w    #CPIE, &CPCTL1                                                    ; Close comparative interrupt
                  bic.w    #LPM3 + GIE, 0(SP)                                                ; Modify stack areas (wake up)
                  reti
                  
                  
                  
                  
      ;-------------------------------------------------------------------------------
                  COMMON  INTVEC                                                            ; Interrupt Vectors
      ;-------------------------------------------------------------------------------
                  ORG     RESET_VECTOR                                                    ; POR, ext. Reset
                  DW    RESET
                  
                  ORG     PORT1_VECTOR                                                    ; external interruption
                  DW    port1_interrupt_service_function
                  
                  ORG        ECOMP0_VECTOR                                                    ; Comparator interrupt
                  DW    ecomp_interrupt_service_function            
                  
                  
                 

  • 0 in reply to Wade Zhang
    Guru 243910 points

    What exactly do you mean with "it can't be used"?

    (I do not have this MCU.)

    (Please use the "Insert Code" function to insert code so that it is formatted properly.)

  • 0 in reply to Clemens Ladisch
    Intellectual 725 points

    Hello Clemens,

    I mean this program doesn't do what I want.Could you please help me check if there are any mistakes

    8741.FR2111_ecomp_0.txt 
    SetREF      mov.b   #PMMPW_H,&PMMCTL0_H      ; Unlock the PMM registers
            bis.w   #INTREFEN,&PMMCTL2       ; Enable internal reference
PollREF     bit.w   #REFGENRDY,&PMMCTL2      ; Poll till internal reference settles
            jz      PollREF

             mov.w   #CPPSEL0+CPNSEL1+CPNSEL2+CPPEN+CPNEN, &CPCTL0
                                            ; Select C1 as input for V+ terminal
                                            ; Select DAC as input for V- terminal
                                            ; Enable eCOMP input
            bis.w    #CPIIE + CPIE, &CPCTL1
            bis.w    #CPDACREFS + CPDACEN, &CPDACCTL
            bis.w    #0x2b, &CPDACDATA
            bis.w    #CPEN, &CPCTL1
sleep   
            clr.w    &CPINT
            nop
            bis.w    #LPM3 + GIE, SR    
            nop
            jmp    sleep
            
            
            
            
            
ecomp_interrupt_service_function    ;Comparative interrupt function


;============================================
            add.w    &CPIV,    PC
            reti
            jmp    wf1_interrupt_pending
            jmp    wf2_interrupt_pending
            
            
wf1_interrupt_pending
            bis.b    #BIT2, &P1DIR
            bic.b    #BIT0, &P2DIR                                                    ; Comparator output off
            bic.b    #BIT2, &P1DIR
            bis.w    #CPIE, &CPCTL1                                                    ; Close comparative interrupt
            bic.w    #LPM3 + GIE, 0(SP)                                                ; Modify stack areas (wake up)
            reti


wf2_interrupt_pending
            bis.b    #BIT2, &P1DIR
            bic.b    #BIT0, &P2DIR                                                    ; Comparator output off
            bic.b    #BIT2, &P1DIR
            bis.w    #CPIE, &CPCTL1                                                    ; Close comparative interrupt
            bic.w    #LPM3 + GIE, 0(SP)                                                ; Modify stack areas (wake up)
            reti
            
            
            
            
;-------------------------------------------------------------------------------
            COMMON  INTVEC                                                            ; Interrupt Vectors
;-------------------------------------------------------------------------------
            ORG     RESET_VECTOR                                                    ; POR, ext. Reset
            DW    RESET
            
            ORG     PORT1_VECTOR                                                    ; external interruption
            DW    port1_interrupt_service_function
            
            ORG        ECOMP0_VECTOR                                                    ; Comparator interrupt
            DW    ecomp_interrupt_service_function

  • 0 in reply to Wade Zhang
    Guru 243910 points
    What exactly do you mean with "doesn't do what I want"? What exactly do you want it to do? What do you observe instead?
  • 0 in reply to Clemens Ladisch
    Intellectual 725 points
    I've solved it,thanks for your help.

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