lcd.asm

利用psoc进行usb及capsense的程序编写

    mov   A,[X+BG_ROW]                 ; Row in A
    mov   X,[X+BG_COL]                 ; Col in X
    call  LCD_Position                 ; Set cursor position
    pop  X

LCD_BG_LOOP1:
    cmp   [X+BG_LENGTH],00h            ; Check for past end of BG
    jnz   LCD_CHECK1
    mov   A,00h                        ; Load empty character
    jmp   LCD_BG_DOIT                  ;

LCD_CHECK1:
    cmp   [X+BG_LENGTH],06h            ; Check if BG pointer is at this character
    jnc   LCD_CHECK2                   ; Note yet, use full character
    mov   A,[X+BG_LENGTH]
    sub   [X+BG_LENGTH],A
    jmp   LCD_BG_DOIT

LCD_CHECK2:                            ; Put index to full character
    mov   A, 06h
    sub   [X+BG_LENGTH],05h            ; Subtract another 5 positions

LCD_BG_DOIT:
    call  LCD_WriteData                ; Display BG character

    dec   [X+BG_CHAR_LEN]              ; Dec Char count
    jnz   LCD_BG_LOOP1                 ; Do it all over again
    RAM_EPILOGUE RAM_USE_CLASS_2
    ret
.ENDSECTION

IF SYSTEM_SMALL_MEMORY_MODEL
.SECTION
;-----------------------------------------------------------------------------
;  FUNCTION NAME: LCD_DrawVBG
;
;  DESCRIPTION:
;  This legacy fastcall version are provided only to support existing small
;  memory model assembly language code---it does not work in the large memory
;  model.
;
;  ** This legacy fastcall version is provided on a temporary basis to
;  ** ease the transition to the 4.2 release of PSoC Designer. Its use is
;  ** deprecated and its status is "No Further Maintenance". If you call this
;  ** function in assembly you should convert to _LCD_DrawVBG
;  ** (with a leading underscore) and the fastcall16 interface
;
;  Draw a vertical bargraph on the LCD with the given parameters. This
;  is a legacy function that is intended to support existing Assembly
;  language programs that call this function.  This should not be used for
;  new code or with Large Memory Model programs.
;-----------------------------------------------------------------------------
;
;  LEGACY FASTCALL ARGUMENTS:
;    A    => Starting row for bargraph 0 to 3
;   [X]   => Starting Column for bargraph 0 to 40+
;   [x-1] => Height of bargraph in chars 1 - 4
;   [X-2] => Position of pointer in segments 8 times height
;  RETURNS:
;
;  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.
;    
;    If LCD_Init is not called before this function, the
;    bargraph will not be drawn properly.
;
; Stack offset constants
VBG_COLX:            equ  0
VBG_CHAR_HEIGHTX:    equ -1
VBG_SEG_HEIGHTX:     equ -2

LCD_DrawVBG:

    and   A,03h                        ; Make sure only rows 0 - 3 are valid
VBG_LOOPX:
    push  A
    index LCD_ROW_OFFSET               ; Get row offset
    add   A,[X+VBG_COLX]                ; Add column offset to position
    call  LCD_Control                  ; Position Cursor
    cmp   [X+VBG_SEG_HEIGHTX],00h       ; Check for zero segs
    jnz   VBG_NZ_SEGX
    mov   A,' '                        ; Load space character
    jmp   VBG_WRITE_CHARX
VBG_NZ_SEGX:
    cmp   [X+VBG_SEG_HEIGHTX],09h       ; Check for full segment
    jnc   VBG_FULL_SEGX
                                       ; Partial segment between 1 and 8
    mov   A,[X+VBG_SEG_HEIGHTX]
    dec   A
    mov   [X+VBG_SEG_HEIGHTX],00h       ; Zero segment height
    jmp   VBG_WRITE_CHARX

VBG_FULL_SEGX:                          ; Bargaph
    sub   [X+VBG_SEG_HEIGHTX],08h       ; Subtract full segment
    mov   A,07h                        ; Load full segment

VBG_WRITE_CHARX:                        ; Write character to display
    call  LCD_WriteData                ; Write value
    pop   A
    dec   A
    dec   [X+VBG_CHAR_HEIGHTX]
    jnz   VBG_LOOPX
    ret
.ENDSECTION
ENDIF ; SYSTEM_SMALL_MEMORY_MODEL

.SECTION
;-----------------------------------------------------------------------------
;  FUNCTION NAME: LCD_DrawVBG
;
;  DESCRIPTION:
;     Draw a vertical bargraph on the LCD with the given parameters.
;
;
;-----------------------------------------------------------------------------
;
;  FASTCALL16 ARGUMENTS:
;
;   [SP-3] => Starting row for bargraph 0 to 3
;   [SP-4] => Starting Column for bargraph 0 to 40+
;   [SP-5] => Height of bargraph in chars 1 - 4
;   [SP-6] => Position of pointer in segments 8 times height
;  RETURNS:
;
;  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.
;          
;    Currently only the page pointer registers listed below are modified: 
;          CUR_PP
;
;    If LCD_Init is not called before this function, the
;    bargraph will not be drawn properly.
;
; Stack offset constants
VBG_ROW:        equ -3
VBG_COL:            equ -4
VBG_CHAR_HEIGHT:    equ -5
VBG_SEG_HEIGHT:     equ -6

_LCD_DrawVBG:
    RAM_PROLOGUE RAM_USE_CLASS_2
    mov   X, SP
    mov   A, [X+VBG_ROW]
    and   A,03h                        ; Make sure only rows 0 - 3 are valid
VBG_LOOP:
    push  A
    index LCD_ROW_OFFSET               ; Get row offset
    add   A,[X+VBG_COL]                ; Add column offset to position
    call  LCD_Control                  ; Position Cursor
    cmp   [X+VBG_SEG_HEIGHT],00h       ; Check for zero segs
    jnz   VBG_NZ_SEG
    mov   A,' '                        ; Load space character
    jmp   VBG_WRITE_CHAR
VBG_NZ_SEG:
    cmp   [X+VBG_SEG_HEIGHT],09h       ; Check for full segment
    jnc   VBG_FULL_SEG
                                       ; Partial segment between 1 and 8
    mov   A,[X+VBG_SEG_HEIGHT]
    dec   A
    mov   [X+VBG_SEG_HEIGHT],00h       ; Zero segment height
    jmp   VBG_WRITE_CHAR

VBG_FULL_SEG:                          ; Bargaph
    sub   [X+VBG_SEG_HEIGHT],08h       ; Subtract full segment
    mov   A,07h                        ; Load full segment

VBG_WRITE_CHAR:                        ; Write character to display
    call  LCD_WriteData                ; Write value
    pop   A
    dec   A
    dec   [X+VBG_CHAR_HEIGHT]
    jnz   VBG_LOOP
    RAM_EPILOGUE RAM_USE_CLASS_2
    ret
.ENDSECTION

.SECTION
;-----------------------------------------------------------------------------
;  FUNCTION NAME: LCD_InitVBG
;
;  DESCRIPTION:
;     Initialize the vertical bargraph characters.
;
;-----------------------------------------------------------------------------
;
;  ARGUMENTS:  none
;
;  RETURNS:  none
;
;  SIDE EFFECTS:
;    REGISTERS ARE VOLATILE: THE A AND X REGISTERS MAY BE MODIFIED!
;    Only one type of bargraph (horizontal or vertical) may be used
;    at a time since they each require their own set of characters.
;
;  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.
;          
;    Currently only the page pointer registers listed below are modified: 
;          CUR_PP
;
; Stack offset constants
VBGDATA_CTR:      equ    00h           ; Char data count stack offset
VBG_BYTES:        equ    01h           ; Byte counter stack offset

 LCD_InitVBG:
_LCD_InitVBG:
    RAM_PROLOGUE RAM_USE_CLASS_2
    mov   X,SP                         ; Get location of stack
    push  A                            ; Create 2 locations
    push  A

    mov   A,CG_RAM_OFFSET              ; Setup pointer
    call  LCD_Control                  ; Position the CG pointer
    mov   [X+VBGDATA_CTR],01h          ; Reset data counter

 VBG_Loop1:                            ; loop once for each 8 characters
    mov   [X+VBG_BYTES],08h            ; Load cycle pointer
 VBG_Loop2:                            ; Loop once for each line in character (8 times)
    mov   A,[X+VBGDATA_CTR]
    cmp   A,[X+VBG_BYTES]
    jnc   VBG_SOLID
    mov   A,00h                        ; Empty line
    jmp   VBG_Load                     ; Jump to load the bargraph
VBG_SOLID:
    mov   A,FFh                        ; Load solid line
VBG_Load:
    call  LCD_WriteData                ; character data
    dec   [X+VBG_BYTES]                ; Dec byte counter
    jnz   VBG_Loop2                    ; End Loop 2
    inc   [X+VBGDATA_CTR]
    cmp   [X+VBGDATA_CTR],09h
    jnz   VBG_Loop1                    ; End Loop1

    pop  A
    pop  A
    mov  A,DISP_ON                    ; Turn on display, don't really
    call LCD_Control                   ; need this.
    RAM_EPILOGUE RAM_USE_CLASS_2
    ret
.ENDSECTION

;-----------------------------------------------------------------------------
;  FUNCTION NAME: LCD_InitBG
;
;  DESCRIPTION:
;     Initialize horizontal bargraph characters
;
;-----------------------------------------------------------------------------
;
;  ARGUMENTS:
;     A = type  0 = full                   |||||||||........
;               1 = single vertical line   ..........|......
;
;  RETURNS:
;
;  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.
;          
;    Currently only the page pointer registers listed below are modified: 
;          CUR_PP
;
;    Only one type of bargraph (horizontal or vertical) may be used
;    at a time since they each require their own set of characters.
;
;  THEORY of OPERATION or PROCEDURE:
;    This function writes to the LCD character RAM to generate 8 custom
;    characters used to generated one of two horizontal bargraphs.
;
.LITERAL
 BG_TYPE1:: ; ....., |...., ||..., |||.., ||||., |||||, |||||
     DB    00h, 10h, 18h, 1Ch, 1Eh, 1Fh, 1Fh
 BG_TYPE2:: ; ....., |...., .|..., ..|.., ...|., ....|, .....
    DB  00h, 10h, 08h, 04h, 02h, 01h, 00h
.ENDLITERAL

.SECTION
; Stack offset constants
BGDATA_PTR:   equ    00h               ; Stack offsets
BGCHARS:      equ    01h
BGTYPE:       equ    02h

 LCD_InitBG:
_LCD_InitBG:
    RAM_PROLOGUE RAM_USE_CLASS_2
    mov   X,SP                         ; Get location of stack
    add   SP,3
    mov   [X+BGTYPE],A                 ; Store the bargraph type

    mov   A,CG_RAM_OFFSET              ; Setup pointer
    call  LCD_Control                  ; Position the CG pointer
    mov   [X+BGDATA_PTR],00h           ; Reset pointer to BG data

 BG_Loop1:
    mov   [X+BGCHARS],08h              ; Load cycle pointer
 BG_Loop2:
    mov   A,[X+BGDATA_PTR]
    cmp   [X+BGTYPE],00h               ; Check which bargraph
    jnz   BG_OTHER
    index BG_TYPE1
    jmp   BG_Load
 BG_OTHER:
    index BG_TYPE2
 BG_Load:
    call  LCD_WriteData
    dec   [X+BGCHARS]                  ; Character builder counter
    jnz   BG_Loop2
    inc   [X+BGDATA_PTR]               ; Advance to next character
    cmp   [X+BGDATA_PTR],07h
    jnz   BG_Loop1

    add   SP,-3
    mov   A,DISP_ON
    call  LCD_Control
    RAM_EPILOGUE RAM_USE_CLASS_2
    ret
.ENDSECTION

ENDIF

; End of File LCD.asm