in_bpf.asm

测量脉搏的源码 Cypress公司使用 CY27443 完成相关的功能

;;*****************************************************************************
;;*****************************************************************************
;;  FILENAME: In_BPF.asm
;;   Version: 5.1, Updated on 2003/11/20 at 18:00:49
;;  Generated by PSoC Designer ver 4.1 BETA b923 : 11 December, 2003
;;
;;  DESCRIPTION: Asm source for 2 Pole Switched Capacitor Band Pass Filter
;;
;;  NOTE: User Module APIs conform to the fastcall convention for marshalling
;;        arguments and observe the associated "Registers are volatile" policy.
;;        This means it is the caller's responsibility to preserve any values
;;        in the X and A registers that are still needed after the API
;;        function returns. Even though these registers may be preserved now,
;;        there is no guarantee they will be preserved in future releases.
;;-----------------------------------------------------------------------------
;;  Copyright (c) Cypress MicroSystems 2001-2003. All Rights Reserved.
;;*****************************************************************************
;;*****************************************************************************

include "m8c.inc"
include "In_BPF.inc"


;-----------------------------------------------
;  Global Symbols
;-----------------------------------------------
export  In_BPF_Start
export _In_BPF_Start
export  In_BPF_SetPower
export _In_BPF_SetPower

export  In_BPF_SetC1
export _In_BPF_SetC1
export  In_BPF_SetC2
export _In_BPF_SetC2
export  In_BPF_SetC3
export _In_BPF_SetC3
export  In_BPF_SetC4
export _In_BPF_SetC4
export  In_BPF_SetCA
export _In_BPF_SetCA
export  In_BPF_SetCB
export _In_BPF_SetCB
export  In_BPF_SetPolarity
export _In_BPF_SetPolarity

export  In_BPF_Stop
export _In_BPF_Stop


;-----------------------------------------------
; Variable Allocation
;-----------------------------------------------
AREA bss (RAM,REL)



;-----------------------------------------------
;  EQUATES
;-----------------------------------------------
bPOWERMASK:          equ   03h         ; Power field mask for CR3
BPF_CNUMMASK:        equ   1fh         ; Mask for A, B & C Caps
BPF_CFBMASK:         equ   80h         ; Mask for Feedback Caps
BPF_POLARITYMASK:    equ   20h         ; Mask of Asign field for CR0


AREA UserModules (ROM,REL)
;-----------------------------------------------------------------------------
;  FUNCTION NAME: In_BPF_Start
;
;  DESCRIPTION: Applies power setting to the module's PSoC blocks
;
;-----------------------------------------------------------------------------
;
;  ARGUMENTS:    A register contains the power setting (constant)
;  RETURNS:      Nothing
;  SIDE EFFECTS: REGISTERS ARE VOLATILE: THE A AND X REGISTERS MAY BE MODIFIED!
;

 In_BPF_Start:
_In_BPF_Start:
 In_BPF_SetPower:
_In_BPF_SetPower:

    and A, bPOWERMASK                        ; mask A to protect unchanged bits
    mov X, SP                                ; define temp store location

    push A                                   ; put power value in temp store
    mov A, reg[In_BPF_FLIN_CR3]    ; read power value
    and A, ~bPOWERMASK                       ; clear power bits in A
    or  A, [X]                               ; combine power value with balance of reg.
    mov reg[In_BPF_FLIN_CR3], A    ; move complete value back to register

    mov A, reg[In_BPF_FLFB_CR3]    ; read power value
    and A, ~bPOWERMASK                       ; clear power bits in A
    or  A, [X]                               ; combine power value with balance of reg.
    mov reg[In_BPF_FLFB_CR3], A    ; move complete value back to register
    pop A
    ret

;-----------------------------------------------------------------------------
;  FUNCTION NAME: In_BPF_SetCn, n=1..4
;
;  DESCRIPTION:   Alters the filter transfer function by modifying the value
;                 of the capacitors (defined in In_BPF.inc)
;
;-----------------------------------------------------------------------------
;
;  ARGUMENTS:    The A register contains a non-negative integer less than 32
;  RETURNS:
;  SIDE EFFECTS: REGISTERS ARE VOLATILE: THE A AND X REGISTERS MAY BE MODIFIED!
;

 In_BPF_SetC1:
_In_BPF_SetC1:

    and A, BPF_CNUMMASK                      ; mask A to protect unchanged bits
    mov X, SP                                ; define temp store location
    push A                                   ; put C1 value in temp store
    mov A, reg[In_BPF_FILT_C1_REG] ; read current C1
    and A, ~BPF_CNUMMASK                     ; clear C1 bits in A
    or  A, [X]                               ; combine C1 value with balance of reg.
    mov reg[In_BPF_FILT_C1_REG], A ; move complete value back to register
    pop  A
    ret

 In_BPF_SetC2:
_In_BPF_SetC2:

    and A, BPF_CNUMMASK                      ; mask A to protect unchanged bits
    mov X, SP                                ; define temp store location
    push A                                   ; put C2 value in temp store
    mov A, reg[In_BPF_FILT_C2_REG] ; read current C2
    and A, ~BPF_CNUMMASK                     ; clear C2 bits in A
    or  A, [X]                               ; combine C2 value with balance of reg.
    mov reg[In_BPF_FILT_C2_REG], A ; move complete value back to register
    pop A
    ret

 In_BPF_SetC3:
_In_BPF_SetC3:

    and A, BPF_CNUMMASK                      ; mask A to protect unchanged bits
    mov X, SP                                ; define temp store location
    push A                                   ; put C3 value in temp store
    mov A, reg[In_BPF_FILT_C3_REG] ; read current C3
    and A, ~BPF_CNUMMASK                     ; clear C3 bits in A
    or  A, [X]                               ; combine C3 value with balance of reg.
    mov reg[In_BPF_FILT_C3_REG], A ; move complete value back to register
    pop A
    ret

 In_BPF_SetC4:
_In_BPF_SetC4:

    and A, BPF_CNUMMASK                      ; mask A to protect unchanged bits
    mov X, SP                                ; define temp store location
    push A                                   ; put C4 value in temp store
    mov A, reg[In_BPF_FILT_C4_REG] ; read current C4
    and A, ~BPF_CNUMMASK                     ; clear C4 bits in A
    or  A, [X]                               ; combine C4 value with balance of reg.
    mov reg[In_BPF_FILT_C4_REG], A ; move complete value back to register
    pop A
    ret


;-----------------------------------------------------------------------------
;  FUNCTION NAME: In_BPF_SetCA
;            and  In_BPF_SetCB
;
;  DESCRIPTION:   Alters the filter transfer function by modifying the value
;                 of the op-amp feedback capacitors (see In_BPF.inc)
;-----------------------------------------------------------------------------
;
;  ARGUMENTS:    The A register contains one of the In_BPF_FEEDBACK
;                  constants defined in In_BPF.inc
;  RETURNS:      Nothing.
;  SIDE EFFECTS: REGISTERS ARE VOLATILE: THE A AND X REGISTERS MAY BE MODIFIED!
;

 In_BPF_SetCA:
_In_BPF_SetCA:
    cmp   A, In_BPF_FEEDBACK_32    ; Change Feedback to 32 units?
    jz    .SetCAto32                         ;    Yes, go make it so
                                             ;     No, clear it to 16 units...
    and   reg[In_BPF_FILT_CA_REG], ~BPF_CFBMASK
    ret
.SetCAto32:
    or    reg[In_BPF_FILT_CA_REG],  BPF_CFBMASK
    ret


 In_BPF_SetCB:
_In_BPF_SetCB:
    cmp   A, In_BPF_FEEDBACK_32    ; Change Feedback to 32 units?
    jz    .SetCAto32                         ;    Yes, go make it so
                                             ;     No, clear it to 16 units...
    and   reg[In_BPF_FILT_CB_REG], ~BPF_CFBMASK
    ret
.SetCAto32:
    or    reg[In_BPF_FILT_CB_REG],  BPF_CFBMASK
    ret

;-----------------------------------------------------------------------------
;  FUNCTION NAME: In_BPF_SetPolarity
;
;  DESCRIPTION:   Alters the output polarity of the data by altering the
;                 input polarity at FLIN
;-----------------------------------------------------------------------------
;
;  ARGUMENTS:    The A register contains one of the In_BPF_POLARITY
;                  constants defined in In_BPF.inc
;  RETURNS:      Nothing.
;  SIDE EFFECTS: REGISTERS ARE VOLATILE: THE A AND X REGISTERS MAY BE MODIFIED!
;

 In_BPF_SetPolarity:
_In_BPF_SetPolarity:
    cmp   A, In_BPF_POLARITY_NON_INVERTING ; Should the output be non-inverting?
    jz    .SetPoltoNonInv                         ;    Yes, go make it so
                                                  ;    No, then set it to Inverting...
    or    reg[In_BPF_FLIN_CR0], BPF_POLARITYMASK
    ret
.SetPoltoNonInv:
    and   reg[In_BPF_FLIN_CR0], ~BPF_POLARITYMASK
    ret


;-----------------------------------------------------------------------------
;  FUNCTION NAME: In_BPF_Stop
;
;  DESCRIPTION: Cuts power to the user module.
;
;-----------------------------------------------------------------------------
;
;  ARGUMENTS:     None
;  RETURNS:       Nothing
;  SIDE EFFECTS: REGISTERS ARE VOLATILE: THE A AND X REGISTERS MAY BE MODIFIED!
;
 In_BPF_Stop:
_In_BPF_Stop:


    and reg[In_BPF_FLIN_CR3], ~bPOWERMASK
    and reg[In_BPF_FLFB_CR3], ~bPOWERMASK
    ret


; End of File In_BPF.asm