📄 readkey.asm
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.IFNDEF @_LIB_F_SCANKEY_READKEY_ASM
@_LIB_F_SCANKEY_READKEY_ASM .EQU 1
.INCLUDE "registerext.def"
//.INCLUDE "peripheral_ram_ext.def"
//.INCLUDE "F_DIRECTKEY.def"
//Modify by Chris Huang 2006.12.04
//R4 @_Key_flag .DS 1
//R4+1 @_RK_port_code .DS 1
//R4+2 @_RK_buf .DS 1 ;read key temporal
//R4+3 @_RK_chk_bit .DS 1
F_keep .EQU 15
F_open .EQU 14
F_push .EQU 13
ReadKey .MACRO P_KEY_RAM_BUFFER,Port_init
PUSH IO[SR]
// PUSH R0
PUSH R1
PUSH R2
PUSH R3
PUSH R4
PUSH R5
PUSH R6
R4 = P_KEY_RAM_BUFFER
R6 = Port_init
CALL @_LIB_F_DIRECTKEY
POP R6
POP R5
POP R4
POP R3
POP R2
POP R1
// POP R0
POP IO[SR]
.ENDM
;*******************DIRECTKEY MACRO******************************
;.GLOBAL @_LIB_F_DIRECTKEY
.CODE @_LIB_F_DIRECTKEY_
;.EXTERN @_LIB_F_DIRECTKEY
@_LIB_F_DIRECTKEY:
R0 = #10000000b ;clear Flag exclude Flag_keep
R0 = [R4] AND R0
//###R0 = @_Key_flag AND R0
[R4] = R0
//###@_Key_flag = R0 (L)
R0 = IO[PORTB] ;read portB
R0 = R0 AND R6 ;#0x00FF
R5 = R4 + #2
[R5] = R0 ;save to Read_buf
//###@_RK_buf = R0 (L) ;save to Read_buf
R5 = R4 + #1
R0 = R0 XOR [R5] ;check same as old data
//###R0 = R0 XOR @_RK_port_code ;check same as old data
IF EQ JMP @_LIB_F_DIRECTKEY_RK_sameas ;read = old data
;----------------------------------------------------------
@_LIB_F_DIRECTKEY_RK_difference:
R5 = R4 + #2
R0 = [R5]
//###R0 = @_RK_buf (L)
Call @_LIB_F_DIRECTKEY_GPBL_debounce ; have Keyin -> call debounce routing
BTEST R1.0
IF TS JMP @_LIB_F_DIRECTKEY_RK_ret ; debounce fail
;-------------------------------------- ; debounce OK
R0 = #0
BS R0.0
R5 = R4 + #3
[R5] = R0
//###@_RK_chk_bit = R0 (L)
@_LIB_F_DIRECTKEY_RK_bit_chk:
R5 = R4 + #1
R0 = [R5]
//###R0 = @_RK_port_code (L)
R5 = R4 + #2
R0 = R0 XOR [R5] ;set difference bit =1
//###R0 = R0 XOR @_RK_buf ;set difference bit =1
R5 = R4 + #3
R0 = R0 AND [R5] ;diff_bit = check_bit ?
//###R0 = R0 AND @_RK_chk_bit ;diff_bit = check_bit ?
IF EQ JMP @_LIB_F_DIRECTKEY_RK_bit_next ;diff_bit <> check_bit to check next bit
R5 = R4 + #1
R0 = [R5] ;diff_bit = 1 or 0
//###R0 = @_RK_port_code (L) ;diff_bit = 1 or 0
R5 = R4 + #3
R0 = R0 AND [R5]
//###R0 = R0 AND @_RK_chk_bit
IF EQ JMP @_LIB_F_DIRECTKEY_RK_h2l
@_LIB_F_DIRECTKEY_RK_l2h: ;diff_bit = 1, Lo change Hi
R0 = [R4]
//###R0 = @_Key_flag (L)
BS R0.F_push ;set Flag_push
[R4] = R0
//###@_Key_flag = R0 (L)
R5 = R4 + #3
R0 = [R5] ;save to RK_port_code
//###R0 = @_RK_chk_bit (L) ;save to RK_port_code
R5 = R4 + #1
R0 = R0 XOR [R5]
//###R0 = R0 XOR @_RK_port_code
R5 = R4 + #1
[R5] = R0
//###@_RK_port_code = R0 (L)
JMP @_LIB_F_DIRECTKEY_RK_numb
@_LIB_F_DIRECTKEY_RK_h2l: ;diff_bit = 0, Hi change Lo
R0 = [R4]
//###R0 = @_Key_flag (L)
BS R0.F_open ;set Flag_open
[R4] = R0
//###@_Key_flag = R0 (L)
R5 = R4 + #3
R0 = [R5]
//###R0 = @_RK_chk_bit (L)
R5 = R4 + #1
R0 = R0 XOR [R5]
//###R0 = R0 XOR @_RK_port_code
R5 = R4 + #1
[R5] = R0
//###@_RK_port_code = R0 (L)
R5 = R4 + #2
R0 = [R5] ;check all open ?
//###R0 = @_RK_buf (L) ;check all open ?
R1 = R6 ;#Port_init ;RK_port_code
CMP R1,R0
IF NE JMP @_LIB_F_DIRECTKEY_RK_numb
R0 = [R4]
//###R0 = @_Key_flag (L)
BC R0.F_keep ;all open, clear Flag_keep
[R4] = R0
//###@_Key_flag = R0 (L)
;--------------------------------------
@_LIB_F_DIRECTKEY_RK_numb: ;set change key number
BC IO[SR].Carry
R5 = R4 + #3
R0 = [R5]
//###R0 = @_RK_chk_bit (L)
R0 = SHR R0
; R5 = R4 + #3
[R5] = R0
//### @_RK_chk_bit = R0 (L)
IF CS JMP @_LIB_F_DIRECTKEY_RK_end
R0 = [R4]
//###R0 = @_Key_flag (L)
R0 = R0 + #1
[R4] = R0
//###@_Key_flag = R0 (L)
JMP @_LIB_F_DIRECTKEY_RK_numb
;--------------------------------------
@_LIB_F_DIRECTKEY_RK_bit_next: ;set next check bit =1
R5 = R4 + #3
R0 = [R5]
//###R0 = @_RK_chk_bit (L)
R0 = SHL R0
R5 = R4 + #3
[R5] = R0
//###@_RK_chk_bit = R0 (L)
IF CC JMP @_LIB_F_DIRECTKEY_RK_bit_chk
@_LIB_F_DIRECTKEY_RK_end: ;read key end
R0=[R4]
RET
;----------------------------------------------------------
; subcall
;----------------------------------------------------------
@_LIB_F_DIRECTKEY_RK_sameas: ;read key same as old_data
R5 = R4 + #2
R0 = [R5] ;check read_buf = 0
//###R0 = @_RK_buf (L) ;check read_buf = 0
R0 = R0 - R6 ;#Port_init ;;0XFFFF
IF EQ JMP @_LIB_F_DIRECTKEY_RK_ret ;if zero , return
R0 = [R4]
//###R0 = @_Key_flag (L)
BS R0.F_keep
[R4] = R0 ;all open
//###@_Key_flag = R0 (L) ;all open
@_LIB_F_DIRECTKEY_RK_ret: ;read key fail go back
JMP @_LIB_F_DIRECTKEY_RK_end
//ret
;--------------------------------------
;------------------------------
@_LIB_F_DIRECTKEY_GPBL_debounce:
R2 = #10 ;#20 ;re-read times
@_LIB_F_DIRECTKEY_GPBL_debounce_1:
;R3 = #0x3FF8 ;delay 1ms
;RPT R3
R3 = #0x00FF ;#0x0FFE ;delay 1ms
LOOP R3
NOP
NOP
NOP
NOP
.ENDL
R1 = IO[PORTB] ;read portBL
;R1 = R1 AND #0x00FF
R1 = R1 AND R6
;R1 = R1 XOR R0
R5 = R4 + #2
R1 = R1 XOR [R5] ;check PortB == R0 (Portb-buf)?
IF NE JMP @_LIB_F_DIRECTKEY_GPBL_debounde_fail
R2 = R2 - #1
IF EQ JMP @_LIB_F_DIRECTKEY_GPBL_debounce_OK
JMP @_LIB_F_DIRECTKEY_GPBL_debounce_1
@_LIB_F_DIRECTKEY_GPBL_debounde_fail: ; PBL difference -> debounce Fail
R1 = #1
RET
@_LIB_F_DIRECTKEY_GPBL_debounce_OK: ; PBL same as -> debounce OK
R1 = #0
RET
;------------------------------
.ENDIF⌨️ 快捷键说明
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