?? atmel.mod
字號(hào):
;**********************************************************************
;* Module : ATMEL.MOD
;* Programmer: Tony Papadimitriou
;* Purpose : Atmel FLASH/EEPROM related OS-called routines
;* Language : MC68HC11 (ASM11 v1.85+)
;* Status : Copyright (c) 1999 by Tony Papadimitriou
;* Segments : ROM : Code
;* : SEG9 : OS definitions (this allows adding more functions)
;* Note(s) : All routines first copy themselves to stack RAM,
;* : then execute from there. For this reason a sufficient
;* : amount of stack space must be available before entry.
;* : Roughly about 180 bytes are needed just for the code itself
;* : not counting stack required for execution.
;* History : 99.12.07 v1.00 Original
;* : 99.12.14 v1.01 Added delay in SDP_On/PD_Off
;* : 99.12.15 v1.02 Corrected fBlockWriteAtmel to actually run from RAM
;* : 99.12.16 v1.03 Minor optimizations
;* : 99.12.17 v1.04 Minor optimizations/fixes
;**********************************************************************
#ifmain
#LISTOFF
#INCLUDE 811E2.INC
#INCLUDE COMMON.INC
#INCLUDE OS11/OSERRORS.INC
#LISTON
#SEG9
ORG $FF00
#endif
?$5555 EQU $D555 ;change to 5555 if using lower 32K
?$2AAA EQU $AAAA ;change to 2AAA if using lower 32K
?DELAY EQU 3333 ;Delay constant for 10msec at 2MHz E
?SECTOR_SIZE EQU 64 ;DO NOT CHANGE; bytes per sector
#SEG9
#ifndef OSCommands
OSCommands equ *
#endif
fBlockWriteAtmel equ *-OSCommands/2 ;Write EEPROM bytes using block mode
dw ?BlockWriteAtmel
fWriteAtmel equ *-OSCommands/2 ;Write one EEPROM byte
dw ?WriteAtmel
fEraseAtmel equ *-OSCommands/2 ;Erase one EEPROM byte
dw ?EraseAtmel
fSDP_On equ *-OSCommands/2 ;Software Data Protection On
dw ?SDP_On
fSDP_Off equ *-OSCommands/2 ;Software Data Protection Off
dw ?SDP_Off
fBulkEraseAtmel equ *-OSCommands/2 ;Bulk Erase EEPROM
dw ?BulkEraseAtmel
#PAGE ;Operating System routines expanded
**********************************************************************
* Operating System routines expanded *
**********************************************************************
#ROM
;********************************************************************
; THE FOLLOWING CODE SECTION IS FIRST COPIED TO RAM, THEN EXECUTED
;********************************************************************
?RAM pshb
ldb #$AA ;Load $AA to $5555
stb ?$5555
comb ;Load $55 to $2AAA
stb ?$2AAA
ldb #$A0 ;Load $A0 to $5AAA
stb ?$5555
pulb
sta ,x ;write actual value to program
pshy
ldy #?DELAY ;Delay at most ~10 msec or until read value is verified
?RAM.Loop cmpa ,x ;if WRITTEN=READ then
beq ?RAM.Exit ; exit
dey ;else Dec(Y)
bne ?RAM.Loop ; if Y <> 0 then goto ?RAM.Loop
puly
sec ;Failure
rts
?RAM.Exit puly
clc ;Success
rts
?Chip_Erase pshb
ldb #$AA ;Load $AA to $5555
stb ?$5555
comb ;Load $55 to $2AAA
stb ?$2AAA
ldb #$80 ;Load $80 to $5AAA
stb ?$5555
ldb #$AA ;Load $AA to $5555
stb ?$5555
comb ;Load $55 to $2AAA
stb ?$2AAA
ldb #$10 ;Load $10 to $5AAA
stb ?$5555
pulb
?Delay10 pshx
ldx #?DELAY ;Delay 10 msec
dex
bne *-1
pulx
rts
?SDP_Off.Delayed bsr ?SDP_Off.Local
bra ?Delay10
?SDP_Off.Local pshb
ldb #$AA ;Load $AA to $5555
stb ?$5555
comb ;Load $55 to $2AAA
stb ?$2AAA
ldb #$80 ;Load $80 to $5AAA
stb ?$5555
ldb #$AA ;Load $AA to $5555
stb ?$5555
comb ;Load $55 to $2AAA
stb ?$2AAA
ldb #$20 ;Load $20 to $5AAA
stb ?$5555
pulb
rts
?SDP_On.Delayed bsr ?SDP_On.Local
bra ?Delay10
?SDP_On.Local pshb
ldb #$AA ;Load $AA to $5555
stb ?$5555
comb ;Load $55 to $2AAA
stb ?$2AAA
ldb #$A0 ;Load $A0 to $5AAA
stb ?$5555
pulb
rts
?BlockWriteAtmel.L lda #?SECTOR_SIZE ;reset counter
?BlockWriteAtmel.A sta ?secbytes,X
jsr ?SDP_On.Local-?RAM,X ;call SDP ON routine
?BlockWriteAtmel.S ldy ?Y,X ;Y -> source
lda ,Y ;A[Y] := source byte
iny
sty ?Y,X ;Inc(Y)
ldy ?X,X ;Y -> destination
sta ,Y ;destination := A[Y]
iny
sty ?X,X ;Inc(Y)
ldd ?D,X ;D := counter
decd ;Dec(D)
std ?D,X
beq ?Delay10 ;if D = 0 then exit with final delay
dec ?secbytes,X
bne ?BlockWriteAtmel.S
bsr ?Delay10 ;wait for block to be written
bra ?BlockWriteAtmel.L
?RAM_Needed equ *-?RAM
;********************************************************************
#push
#mapoff
; IN: X -> destination RAM after GETX #?? (everything else is known)
; On exit, it turn ints off assuming next action is call to subroutine
?Copy pshd ;save used registers
pshx
pshy
ldy #?RAM ;Y -> source
ldb #?RAM_Needed
?Copy.Loop lda ,y ;copy source byte
sta ,x ; to destination
inx ;bump up destination
iny ; and source pointers
decb ;one less byte to copy
bne ?Copy.Loop ;repeat until done
puly ;restore registers
pulx
puld
sei ;no ints allowed
rts
#pull
; Write bytes starting at specified address using block mode
; IN: X -> destination
; : Y -> source
; : D -> block length
?D equ ?RAM_Needed ;Word
?X equ ?RAM_Needed+2 ;Word
?Y equ ?RAM_Needed+4 ;Word
?secbytes equ ?RAM_Needed+6 ;Byte
?BlockWriteAtmel ldd D_,Y
beq ?BlockWriteAtmel.Ex ;exit on zero
xgab ;put A,B in correct order
getx #?RAM_Needed+7 ;allocate temp storage
bsr ?Copy
std ?D,X ;Save D (byte counter)
ldd Y_,Y
std ?Y,X ;Save Y (source pointer)
ldd X_,Y
std ?X,X ;Save X (destination pointer)
andb #?SECTOR_SIZE-1 ;mask to determine 1st sector bytes
lda #?SECTOR_SIZE
sba ;A := ?SECTOR_SIZE - (X & (?SECTOR_SIZE-1))
bne ?BlockWriteAtmel.J ;if zero, then
lda #?SECTOR_SIZE ; reset to full block write
?BlockWriteAtmel.J jsr ?BlockWriteAtmel.A-?RAM,X ;on entry A holds remaining 1st sector bytes
givex #?RAM_Needed+7 ;de-allocate temp storage
?BlockWriteAtmel.Ex clc ;never an error from here
rts
; Write a byte at specified address
; IN: X -> address
; : A = byte to program
?WriteAtmel getx #?RAM_Needed ;allocate temp storage
bsr ?Copy
pshy
lda A_,Y
ldy X_,Y
xgxy ;X->stack, Y->routine
jsr ,Y ;call routine
puly
tpa
ldb B_,Y ;get caller's B (just in error case)
givex #?RAM_Needed ;de-allocate temp storage
tap
rts
?EraseAtmel getx #?RAM_Needed ;allocate temp storage
bsr ?Copy
pshy
lda #$FF
ldy X_,Y
xgxy ;X->stack, Y->routine
jsr ,Y ;call routine
puly
tpa
ldb B_,Y ;get caller's B (just in error case)
givex #?RAM_Needed ;de-allocate temp storage
tap
rts
?BulkEraseAtmel getx #?RAM_Needed ;allocate temp storage
jsr ?Copy
jsr ?Chip_Erase-?RAM,X ;call routine
?Common_Exit givex #?RAM_Needed ;de-allocate temp storage
clc ;never an error from here
rts
?SDP_Off getx #?RAM_Needed ;allocate temp storage
jsr ?Copy
jsr ?SDP_Off.Delayed-?RAM,X
bra ?Common_Exit
?SDP_On getx #?RAM_Needed ;allocate temp storage
jsr ?Copy
jsr ?SDP_On.Delayed-?RAM,X
bra ?Common_Exit
#ifmain
#push
#mapoff
#listoff
#include OS11/DISPATCH.MOD
#pull
#endif?? 快捷鍵說(shuō)明
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