sensehl.asm

cypress的触摸按键模块介绍calibrating_capsense_with_the_csr_user_module___an2355_13.

;;*****************************************************************************
;;  FILENAME: SENSEHL.asm
;;   Version: 1.1, Updated on 2005/10/13 at 09:13:22
;;  Generated by PSoC Designer ver 4.2  b1013 : 02 September, 2004
;;
;;  DESCRIPTION: CSR User Module high level software 
;;                implementation file for the 21xxx PSoC family of devices.
;;-----------------------------------------------------------------------------
;;  Copyright (c) Cypress MicroSystems 2000-2005. All Rights Reserved.
;;*****************************************************************************
;;*****************************************************************************

include "m8c.inc"
include "memory.inc"
include "SENSE.inc"

;-----------------------------------------------
; Global Symbols
;-----------------------------------------------

export _SENSE_bUpdateBaseline
export  SENSE_bUpdateBaseline
IF SENSE_SLIDERS_EXIST
export _SENSE_bGetCentroidPos
export  SENSE_bGetCentroidPos
ENDIF
;-----------------------------------------------
; Variable Allocation
;-----------------------------------------------
AREA InterruptRAM (RAM, REL, CON)

; Global variables
_SENSE_iaSwBaseline:                              ; Baseline, one entry for each switch
 SENSE_iaSwBaseline:                      BLK  (2*SENSE_TotalSwitchCount)
_SENSE_iaSwDiff:                                  ; ABS Diff of raw and and baseline, one entry for each switch
 SENSE_iaSwDiff:                          BLK  (2*SENSE_TotalSwitchCount)
_SENSE_baBtnFThreshold:                           ; Containing variable finger threshold for each button
 SENSE_baBtnFThreshold:                   BLK  SENSE_ButtonCount
_SENSE_baSwOnMask:                                ; Switch mask array containing on/off state of switches
 SENSE_baSwOnMask:                        BLK  ((SENSE_TotalSwitchCount-1)/8)+1
_SENSE_bBaselineUpdateTimer:                      ; Adjusts baseline when signal is within noise threshold
 SENSE_bBaselineUpdateTimer:              BLK  1  
_SENSE_fIsBLValid:                                ; Flag if baseline is valid
 SENSE_fIsBLValid:                        BLK  1

IF SENSE_ESD_DETECTION
; ESD variables used for finger detection
_SENSE_iaSwDeriv:                                 ; Derivative of raw, one entry for each switch
 SENSE_iaSwDeriv:                         BLK  (2*SENSE_TotalSwitchCount)
_SENSE_iaSwPrevResult:                            ; Previous raw result, one entry for each switch
 SENSE_iaSwPrevResult:                    BLK  (2*SENSE_TotalSwitchCount)
_SENSE_baESDDebounce:                             ; Array containing invalid raw data counter to reinstate BL 
 SENSE_baESDDebounce:                     BLK  SENSE_TotalSwitchCount
_SENSE_baBaselineResetCounter:                    ; Containing count to update baseline on finger press on startup
 SENSE_baBaselineResetCounter:            BLK  SENSE_TotalSwitchCount
_SENSE_bAbnormalTimer:                            ; If an ESD event occurs, this timer prevents button presses
 SENSE_bAbnormalTimer:					 BLK  1
ENDIF

IF SENSE_SLIDERS_EXIST
; Global slider variables
_SENSE_baCtrdStartPos:                            ; Array containing centroid starting position
 SENSE_baCtrdStartPos:	                 BLK  SENSE_SliderCount
_SENSE_baCtrdSize:                                ; Array containing centroid size
 SENSE_baCtrdSize:		                 BLK  SENSE_SliderCount
_SENSE_baCtrdPkPos:                               ; Array containing peak position of centroid
 SENSE_baCtrdPkPos:                       BLK  SENSE_SliderCount
_SENSE_iaCtrdPkValue:                             ; Array containing peak value of centroid
 SENSE_iaCtrdPkValue:                     BLK  (2*SENSE_SliderCount)
ENDIF

; Local variables
_SENSE_bEndOfArray:                               ; Temp pointer variable
 SENSE_bEndOfArray:                       BLK  1  
_SENSE_bDivBtwSw:                                 ; Temp divisions between switches
 SENSE_bDivBtwSw:                         BLK  1
_SENSE_fIsPressed:                                ; Temp variable for if any switch is pressed
 SENSE_fIsPressed:                        BLK  1
_SENSE_bCurPos:                                   ; Temp position variable
 SENSE_bCurPos:                           BLK  1  
_SENSE_bCurPosMask:                               ; Temp switch mask used in UpdateBaseline
 SENSE_bCurPosMask:                       BLK  1
_SENSE_bSwMaskPtr:                                ; Temp switch mask pointer used in UpdateBaseline
 SENSE_bSwMaskPtr:                        BLK  1
_SENSE_bStartIndex:                               ; Temp Start index
 SENSE_bStartIndex:						 BLK  1

IF SENSE_SLIDERS_EXIST
; Local slider variables
_SENSE_bCtrdPos:                                  ; Temp position variable
 SENSE_bCtrdPos:                          BLK  1  
_SENSE_iDenom:                                    ; Temp denominator
 SENSE_iDenom:                            BLK  2
_SENSE_iNumer:                                    ; Temp numerator
 SENSE_iNumer:                            BLK  3
_SENSE_iMultTempX:                                ; Temp multiplication register
 SENSE_iMultTempX:                        BLK  3
_SENSE_iMultTempY:                                ; Temp multiplication register
 SENSE_iMultTempY:                        BLK  3
_SENSE_bCurSlider:                        
 SENSE_bCurSlider:                        BLK  1
_SENSE_bCurCtrdStartPos:                          ; Temp current centroid start position
 SENSE_bCurCtrdStartPos:                  BLK  1
_SENSE_bCurCtrdSize:                              ; Temp current centroid size
 SENSE_bCurCtrdSize:                      BLK  1
_SENSE_bBiggestCtrdStartPos:                      ; Temp biggest centroid start position
 SENSE_bBiggestCtrdStartPos:              BLK  1
_SENSE_bBiggestCtrdSize:                          ; Temp biggest centroid size
 SENSE_bBiggestCtrdSize:                  BLK  1
_SENSE_iCurPkValue:                               ; Temp current peak
 SENSE_iCurPkValue:                       BLK  2
_SENSE_bCurPkPos:                                 ; Temp current slider pointer
 SENSE_bCurPkPos:                         BLK  1
_SENSE_bDiplexInfo:                               ; Temp flag for diplex of current group
 SENSE_bDiplexInfo:						 BLK  1
_SENSE_bDiplexMSB:                                ; Temp that contains the address of the rom diplex table
 SENSE_bDiplexMSB:                        BLK  1
_SENSE_bDiplexLSB:
 SENSE_bDiplexLSB:                        BLK  1
ENDIF
	 
; Global variables
export _SENSE_iaSwBaseline
export  SENSE_iaSwBaseline
export _SENSE_iaSwDiff
export  SENSE_iaSwDiff
export _SENSE_baBtnFThreshold
export  SENSE_baBtnFThreshold
export _SENSE_baSwOnMask
export  SENSE_baSwOnMask
export _SENSE_bBaselineUpdateTimer
export  SENSE_bBaselineUpdateTimer
export _SENSE_fIsBLValid
export  SENSE_fIsBLValid

IF SENSE_ESD_DETECTION
; ESD variables
export _SENSE_iaSwDeriv
export  SENSE_iaSwDeriv
export _SENSE_iaSwPrevResult
export  SENSE_iaSwPrevResult
export _SENSE_baESDDebounce
export  SENSE_baESDDebounce
export _SENSE_baBaselineResetCounter
export  SENSE_baBaselineResetCounter
export _SENSE_bAbnormalTimer
export  SENSE_bAbnormalTimer
ENDIF

IF SENSE_SLIDERS_EXIST
; Global slider variables
export _SENSE_baCtrdStartPos
export  SENSE_baCtrdStartPos
export _SENSE_baCtrdSize
export  SENSE_baCtrdSize
export _SENSE_baCtrdPkPos
export  SENSE_baCtrdPkPos
export _SENSE_iaCtrdPkValue
export  SENSE_iaCtrdPkValue
ENDIF

; Local variables
export _SENSE_bDivBtwSw
export  SENSE_bDivBtwSw
export _SENSE_fIsPressed
export  SENSE_fIsPressed
export _SENSE_bEndOfArray
export  SENSE_bEndOfArray
export _SENSE_bCurPos
export  SENSE_bCurPos
export _SENSE_bCurPosMask
export  SENSE_bCurPosMask
export _SENSE_bSwMaskPtr
export  SENSE_bSwMaskPtr

IF SENSE_SLIDERS_EXIST
; Local slider variables
export _SENSE_bCtrdPos
export  SENSE_bCtrdPos
export _SENSE_iDenom
export  SENSE_iDenom
export _SENSE_iNumer
export  SENSE_iNumer
export _SENSE_iMultTempX
export  SENSE_iMultTempX
export _SENSE_iMultTempY
export  SENSE_iMultTempY
export _SENSE_bCurCtrdStartPos
export  SENSE_bCurCtrdStartPos
export _SENSE_bCurCtrdSize
export  SENSE_bCurCtrdSize
export _SENSE_bBiggestCtrdStartPos
export  SENSE_bBiggestCtrdStartPos
export _SENSE_bBiggestCtrdSize
export  SENSE_bBiggestCtrdSize
export _SENSE_iCurPkValue
export  SENSE_iCurPkValue
export _SENSE_bCurPkPos
export  SENSE_bCurPkPos
export _SENSE_bDiplexMSB
export  SENSE_bDiplexMSB
export _SENSE_bDiplexLSB
export  SENSE_bDiplexLSB
ENDIF

;@PSoC_UserCode_INIT@ (Do not change this line.)
;---------------------------------------------------
; Insert your custom declarations below this banner
;---------------------------------------------------

;------------------------
; User Includes
;------------------------


;------------------------
; User Constant Definitions
;------------------------


;------------------------
; User Variable Allocation
;------------------------


;---------------------------------------------------
; Insert your custom declarations above this banner
;---------------------------------------------------
;@PSoC_UserCode_END@ (Do not change this line.)

;------------------------
;  Constant Definitions
;------------------------

AREA UserModules (ROM, REL, CON)

LSB:  equ  1
MSB:  equ  0

FINGER_THRESHOLD:       equ   64h
NOISE_THRESHOLD:        equ   32h
BASELINE_UPDATE_RATE:   equ   14h
ESD_DEBOUNCE:           equ   8h

; The Group Table defines each of the groups of switches or sliders.  There
; is one entry for each slider plus one for the free switches.  The first
; entry is always the free switchs.  Each entry is four bytes.  

; The first byte is the index in the Switch Table where the group starts.  

; The second byte is how many switches are in that group.  For example, in 
; a system where there are 6 free switches and two sliders, the first with 
; 8 switches and the second with 4, the table would look like the following.
;  db 0, 8
;  db 8, 8
;  db 16, 4
;
; The third byte signifies whether the slider is diplexed or not (1 is 
; diplexed, 0 is not diplexed).
;
; The fourth byte is the fixed point multiplier that the slider's
; calculated centroid will be multiplied by to achieve the resolution 
; desired in the CSR wizard.  The multiplier is a byte containing the 
; following definition:  
;    bit 7   bit 6   bit 5   bit 4   bit 3   bit 2   bit 1   bit 0
;     x8	  x4      x2      x1     x1/2    x1/4    x1/8    x1/16
; The formula for the resolution is:
;    Resolution = (SwitchesInSlider - 1) * Multiplier
; For example, if you had a 10 switch slider and you wanted a 
; resolution of 100, the multiplier would need to be 11 1/8 to get
; the closest approximation (using sixteenths).  Therefore the 
; fixed point value would be 0xb2 (8+2+1+1/8)
 
; There are 0x0 groups counting the free switches.
 SENSE_Group_Table:
_SENSE_Group_Table:
; Group Table:
;    Origin    Count    Diplex?    SliceMultiplier
 db   0x0,      0x8,	 0x0,	    0x00 ; Buttons


; Diplex table data are produced for a group only when the group is a 
; slider and is also diplexed.  Otherwise a label is created but no data
; is placed.  The data represents the physical representation of the 
; switches in their location on the PCB.  A label containing the pointer 
; to the corresponding table is also produced for referencing in the high-
; level centroid calculation function.
DiplexTable_0:
; This group is not a diplexed slider


 SENSE_Diplex_Table:
_SENSE_Diplex_Table:
	db >DiplexTable_0, <DiplexTable_0


.SECTION
;-----------------------------------------------------------------------------
;  FUNCTION NAME: SENSE_GetBaseline(void)
;
;  DESCRIPTION:
;      Gathers the baseline for all switches.
;-----------------------------------------------------------------------------
;  STACK USAGE: none
;
;  RAM VARIABLES USED: SENSE_iaSwResult, 
;      SENSE_iaSwBaseline, SENSE_fIsBLValid
;
;  ARGUMENTS: 
;      None 
;   
;  RETURNS:    
;      None, baseline is now updated to current value for all switches
;
;  SIDE EFFECTS: 
;    The A and X registers may be modified by this or future implementations
;    of this function.  The same is true for all RAM page pointer registers in
;    the Large Memory Model.  When necessary, it is the calling function's
;    responsibility to perserve their values across calls to fastcall16 
;    functions.
;
SENSE_GetBaseline:
   ; Define baseline for all switches for the first time
   RAM_X_POINTS_TO_INDEXPAGE
   RAM_SETPAGE_IDX 0 ; ram will always be in interrupt ram area
   mov X, 0
.DefineSwitchBaseline:
   tst [X+SENSE_iaSwResult+MSB], 0xC0 ; check for raw beyond 0x3fff
   jz .StoreRawIntoBaseline ; If raw counts is greater than 0x3fff, baseline will wrap, force to max
   mov [X+SENSE_iaSwBaseline+MSB], 0xff
   mov [X+SENSE_iaSwBaseline+LSB], 0xff
   jmp .StoreNextSwitchesBaseline
.StoreRawIntoBaseline:
   mov A, [X+SENSE_iaSwResult+MSB]
   mov [X+SENSE_iaSwBaseline+MSB], A
IF SENSE_ESD_DETECTION
   mov [X+SENSE_iaSwPrevResult+MSB], A
ENDIF
   mov A, [X+SENSE_iaSwResult+LSB]
   mov [X+SENSE_iaSwBaseline+LSB], A
IF SENSE_ESD_DETECTION
   mov [X+SENSE_iaSwPrevResult+LSB], A
ENDIF
   asl [X+SENSE_iaSwBaseline+LSB] ; Multiply by four for IIR filter resolution
   rlc [X+SENSE_iaSwBaseline+MSB]
   asl [X+SENSE_iaSwBaseline+LSB]
   rlc [X+SENSE_iaSwBaseline+MSB]
.StoreNextSwitchesBaseline:
   inc X
   inc X
   mov A, X
   cmp A, SENSE_TotalSwitchCount*2
   jc .DefineSwitchBaseline

   mov [SENSE_bBaselineUpdateTimer], BASELINE_UPDATE_RATE ; reset the baseline counter

   RAM_X_POINTS_TO_STACKPAGE
   ret
.ENDSECTION

.SECTION
;-----------------------------------------------------------------------------
;  FUNCTION NAME: SENSE_UpdateBaselineIIR(void)
;
;  DESCRIPTION:
;      Updates baseline with 1/8 + 7/8 IIR for all switches.
;-----------------------------------------------------------------------------
;  STACK USAGE: none
;