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|
.include "m16def.inc"
.def tmp0 = r16
.def par0 = r17
.def par1 = r18
.def tmp1 = r19
.def tmp2 = r20
.def ret0 = r21
.def ret1 = r22
.def par2 = r23
.def par3 = r24
.def par4 = r25
.def ret2 = r26
.def heart = r27
.def dig0 = r28
.def dig1 = r29
init:
; Initialize stack pointer
ldi tmp0, HIGH(RAMEND)
out SPH, tmp0
ldi tmp0, LOW(RAMEND)
out SPL, tmp0
; Set data directions and default outputs for ports
ldi tmp0, 0b11111111
out DDRA, tmp0
ldi tmp0, 0b11111111
out DDRB, tmp0
ldi tmp0, 0b11101110
out DDRD, tmp0
cbi PORTC, 0
sbi PORTC, 6
sbi DDRC, 0
sbi DDRC, 1
sbi DDRC, 6
ldi tmp0, 0b00000100
out PORTD, tmp0
; Display all zeros on displays
ldi par0, 0
ldi par1, 0
rcall display
ldi par0, 1
ldi par1, 0
rcall display
ldi par0, 2
ldi par1, 0
rcall display
ldi par0, 3
ldi par1, 0
rcall display
;ldi par0, 0
;ldi par1, 0
;ldi par2, 0x01
;rcall eeprom_write
;ldi par0, 1
;ldi par2, 0x23
;rcall eeprom_write
;ldi par0, 3
;ldi par1, 1
;rcall display
;stop:
;rjmp stop
;rcall write_code
; Load code from EEPROM
rcall load_code
;lds par1, 1
;ldi par0, 0
;rcall display
;stop:
;rjmp stop
; Grab input once and but it on the stack
; For delta bitvector
rcall input
push ret1
push ret2
; Initialize registers and stack top
ldi heart, 0
ldi dig0, 0x10
ldi dig1, 0
ldi tmp0, 0
ldi tmp2, 0
push tmp0
push tmp0
rjmp main
debug_heart:
push par0
push par1
push par2
inc heart
ldi par0, 3
mov par1, heart
rcall display
mov par0, heart
rcall status
ldi par0, 1
ldi par1, 0xFF
ldi par2, 0xFF
rcall wait
pop par2
pop par1
pop par0
ret
main:
ldi par0, 1
ldi par1, 0x30
ldi par2, 0xFF
rcall wait
;rcall debug_heart
; get current button states
rcall input
; detect raising edge on one of the buttons
pop tmp0
pop tmp1
push ret1
push ret0
eor tmp0, ret0
eor tmp1, ret1
and tmp0, ret0
and tmp1, ret1
; button pressed, process
mov par0, tmp0
mov par1, tmp1
rcall translate
mov par0, tmp2
mov par1, ret0
rcall handle
mov tmp2, ret0
rjmp main
wait:
push tmp0
push tmp1
push tmp2
mov tmp0, par0
mov tmp1, par1
mov tmp2, par2
wait_loop:
nop
dec tmp0
brne wait_loop
mov tmp0, par0
dec tmp1
brne wait_loop
mov tmp0, par0
mov tmp1, par1
dec tmp2
brne wait_loop
pop tmp2
pop tmp1
pop tmp0
ret
write_code:
push par0
push par1
push par2
ldi par0, 0
ldi par1, 0
ldi par2, 0x01
rcall eeprom_write
ldi par0, 1
ldi par2, 0x23
rcall eeprom_write
pop par2
pop par1
pop par0
ret
; Load code from EEPROM and store in memory
; Parameters:
; None
; Returns:
; ret0 = Code digits 0-1
; ret1 = Code digits 2-3
load_code:
;ldi ret0, 0x01
;ldi ret1, 0x23
;sts 0, ret0
;sts 1, ret1
;ret
push par0
push par1
; Digits 0-1
ldi par0, 0
ldi par1, 0
rcall eeprom_read
sts 0, ret0
; Digits 2-3
ldi par0, 1
rcall eeprom_read
sts 1, ret0
pop par1
pop par0
ret
; Output bits to shift register.
; Parameters:
; par0 = Bits
; par1:par2 = Call address to set 0
; par3:par4 = Call address to set 1
; Returns:
; None
shift_out:
push par0
push tmp0
ldi tmp0, 8
shift_out_loop:
sbrs par0, 7
rjmp shift_out_low
rjmp shift_out_high
shift_out_low:
mov r31, par1
mov r30, par2
icall
rjmp shift_out_end
shift_out_high:
mov r31, par3
mov r30, par4
icall
rjmp shift_out_end
shift_out_end:
lsl par0
dec tmp0
brne shift_out_loop
pop tmp0
pop par0
ret
; Input bits from shift register.
; Parameters:
; par0:par1 = Call address for one clock cycle
; par2:par3 = Call address to read serial shift in bit
; Returns:
; ret0 = Read bits
shift_in:
push tmp0
ldi tmp0, 8
ldi ret0, 0
shift_in_loop:
lsl ret0
mov r31, par2
mov r30, par3
icall
or ret0, ret2
mov r31, par0
mov r30, par1
icall
dec tmp0
brne shift_in_loop
pop tmp0
ret
; Write to EEPROM
; Parameters:
; par0:par1 = Address
; par2 = Value
; Returns:
; None
eeprom_write:
sbic EECR, EEWE
rjmp eeprom_write
out EEARL, par0
out EEARH, par1
out EEDR, par2
sbi EECR, EEMWE
sbi EECR, EEWE
ret
; Read from EEPROM
; Parameters:
; par0:par1 = Address
; Returns:
; ret0 = Value
eeprom_read:
sbic EECR, EEWE
rjmp eeprom_read
out EEARL, par0
out EEARH, par1
sbi EECR, EERE
in ret0, EEDR
ret
; Output the status
; Parameters:
; par0 = Status bits
; Returns:
; None
status:
push par1
push par2
push par3
push par4
ldi par1, HIGH(status_low)
ldi par2, LOW(status_low)
ldi par3, HIGH(status_high)
ldi par4, LOW(status_high)
rcall shift_out
pop par1
pop par2
pop par3
pop par4
ret
status_low:
push tmp2
in tmp2, PORTD
cbr tmp2, 6
rjmp status_clk
status_high:
push tmp2
in tmp2, PORTD
sbr tmp2, 6
rjmp status_clk
status_clk:
cbr tmp2, 7
out PORTD, tmp2
sbr tmp2, 7
out PORTD, tmp2
pop tmp2
ret
; Display the digit on a given display.
; Parameters:
; par0 = Display number
; par1 = Digit
; Returns:
; None
display:
push par1
push tmp0
andi par1, 0x0F
ldi ZL, LOW(display_map)
ldi ZH, HIGH(display_map)
ldi tmp0, 0
add ZL, par0
adc ZH, tmp0
icall
pop tmp0
pop par1
ret
display_map:
rjmp display_0
rjmp display_1
rjmp display_2
rjmp display_3
display_0:
in tmp0, PORTA
andi tmp0, 0xF0
or tmp0, par1
out PORTA, tmp0
ret
display_1:
in tmp0, PORTB
andi tmp0, 0xF0
or tmp0, par1
out PORTB, tmp0
ret
display_2:
in tmp0, PORTA
andi tmp0, 0x0F
lsl par1
lsl par1
lsl par1
lsl par1
or tmp0, par1
out PORTA, tmp0
ret
display_3:
in tmp0, PORTB
andi tmp0, 0x0F
lsl par1
lsl par1
lsl par1
lsl par1
or tmp0, par1
out PORTB, tmp0
ret
; Sets the corresponding digit number.
; Parameters:
; par0 = Digit number (0-3)
; par1 = Digit (0x00-0x0F)
set_digit:
push tmp0
push par1
andi par1, 0x0F
ldi tmp0, 0
ldi ZL, LOW(set_digit_n)
ldi ZH, HIGH(set_digit_n)
add ZL, par0
adc ZH, tmp0
icall
pop par1
pop tmp0
ret
set_digit_n:
rjmp set_digit_0
rjmp set_digit_1
rjmp set_digit_2
rjmp set_digit_3
set_digit_0:
lsl par1
lsl par1
lsl par1
lsl par1
andi dig0, 0x0F
or dig0, par1
ret
set_digit_1:
andi dig0, 0xF0
or dig0, par1
ret
set_digit_2:
lsl par1
lsl par1
lsl par1
lsl par1
andi dig1, 0x0F
or dig1, par1
ret
set_digit_3:
andi dig1, 0xF0
or dig1, par1
ret
; Gets the corresponding digit number.
; Parameters:
; par0 = Digit number (0-3)
; Returns:
; ret0 = Digit
get_digit:
push tmp0
ldi tmp0, 0
ldi ZL, LOW(get_digit_n)
ldi ZH, HIGH(get_digit_n)
add ZL, par0
adc ZH, tmp0
icall
pop tmp0
ret
get_digit_n:
rjmp get_digit_0
rjmp get_digit_1
rjmp get_digit_2
rjmp get_digit_3
get_digit_0:
mov ret0, dig0
lsr ret0
lsr ret0
lsr ret0
lsr ret0
ret
get_digit_1:
mov ret0, dig0
andi ret0, 0x0F
ret
get_digit_2:
mov ret0, dig1
lsr ret0
lsr ret0
lsr ret0
lsr ret0
ret
get_digit_3:
mov ret0, dig1
andi ret0, 0x0F
ret
; Read the input buttons.
; Parameters:
; None
; Returns:
; ret0 = 0852*741
; ret1 = DCBA#963
input:
; Write selection rows
ldi par0, 1
input_loop:
ldi par1, HIGH(input_write_low)
ldi par2, LOW(input_write_low)
ldi par3, HIGH(input_write_high)
ldi par4, LOW(input_write_high)
rcall shift_out
rjmp input_read
input_write_low:
cbi PORTD, 3
rcall input_write_clk
ret
input_write_high:
sbi PORTD, 3
rcall input_write_clk
ret
input_read:
push tmp0
; clear
;cbi PORTC, 6
push par0
push par1
push par2
;ldi par0, 1
;ldi par1, 1
;ldi par2, 1
;rcall wait
;sbi PORTC, 6
;ldi par0, 1
;ldi par1, 1
;ldi par2, 1
;rcall wait
; load
cbi PORTD, 2
ldi par0, 1
ldi par1, 1
ldi par2, 1
rcall wait
rcall input_read_clk
sbi PORTD, 2
ldi par0, 1
ldi par1, 1
ldi par2, 1
rcall wait
pop par2
pop par1
pop par0
; shift in
push par0
ldi par0, HIGH(input_read_clk)
ldi par1, LOW(input_read_clk)
ldi par2, HIGH(input_read_bit)
ldi par3, LOW(input_read_bit)
push ret0
rcall shift_in
mov tmp0, ret0
pop ret0
pop par0
;lsr tmp0
;lsr tmp0
;lsr tmp0
;lsr tmp0
; par0 = row
; tmp0 = col
sbrc par0, 0
rjmp input_read_row_0
sbrc par0, 1
rjmp input_read_row_1
sbrc par0, 2
rjmp input_read_row_2
sbrc par0, 3
rjmp input_read_row_3
input_write_clk:
cbi PORTC, 1
push par0
push par1
push par2
ldi par0, 1
ldi par1, 1
ldi par2, 1
rcall wait
sbi PORTC, 1
ldi par0, 1
ldi par1, 1
ldi par2, 1
rcall wait
pop par2
pop par1
pop par0
ret
input_read_clk:
cbi PORTD, 5
push par0
push par1
push par2
ldi par0, 1
ldi par1, 1
ldi par2, 1
rcall wait
sbi PORTD, 5
ldi par0, 1
ldi par1, 1
ldi par2, 1
rcall wait
pop par2
pop par1
pop par0
ret
input_read_bit:
ldi ret2, 0
sbic PIND, 4
ldi ret2, 1
ret
input_read_row_0:
andi ret0, 0xF0
or ret0, tmp0
rjmp input_end
input_read_row_1:
andi ret0, 0x0F
lsl tmp0
lsl tmp0
lsl tmp0
lsl tmp0
or ret0, tmp0
rjmp input_end
input_read_row_2:
andi ret1, 0xF0
or ret1, tmp0
rjmp input_end
input_read_row_3:
andi ret1, 0x0F
lsl tmp0
lsl tmp0
lsl tmp0
lsl tmp0
or ret1, tmp0
rjmp input_end
input_end:
pop tmp0
lsl par0
andi par0, 0x0F
cpi par0, 0
brne input_loop_j
ret
input_loop_j:
rjmp input_loop
; Translate input bits to keycode.
; Parameters:
; par0 = Input bits 7..0
; par1 = Input bits 15..8
; Returns:
; ret0 = Translated keycode
translate:
push par0
push par1
push tmp0
ldi tmp0, 16
translate_loop:
sbrs par0, 0
rjmp translate_low
rjmp translate_high
translate_low:
lsr par0
lsr par1
brcc pc+2
ori par0, 0x80
dec tmp0
brne translate_loop
ldi ret0, 0xF0
pop tmp0
pop par1
pop par0
ret
translate_high:
push tmp0
push tmp1
ldi ZL, LOW(translate_map << 1)
ldi ZH, HIGH(translate_map << 1)
dec tmp0
ldi tmp1, 0
add ZL, tmp0
adc ZH, tmp1
lpm ret0, Z
pop tmp1
pop tmp0
pop tmp0
pop par1
pop par0
ret
translate_map:
.db 0x0D, \
0x0C, \
0x0B, \
0x0A, \
0x0F, \
9, \
6, \
3, \
0, \
8, \
5, \
2, \
0x0E, \
7, \
4, \
1
; ret0 = 0852*741
; ret1 = DCBA#963
; Handles the given key input.
; Parameters:
; par0 = state
; par1 = keycode
; Returns:
; ret0 = new state
; Descriptions:
; state = 0bCSSSSSDD
; C = Blinky clock
; S = State information
; 0 = reserved
; D = Current display
.equ HANDLE_STATE_MASK = 0b01111100
.equ HANDLE_STATE_AUTH = (0 << 2)
.equ HANDLE_STATE_AUTHED = (2 << 2)
.equ HANDLE_STATE_CHANGE = (1 << 2)
.equ HANDLE_STATE_FAILED = (3 << 2)
handle:
push tmp0
push tmp1
mov ret0, par0
mov tmp0, par0
andi tmp0, HANDLE_STATE_MASK
lsr tmp0
lsr tmp0
ldi ZL, LOW(handle_map)
ldi ZH, HIGH(handle_map)
ldi tmp1, 0
add ZL, tmp0
adc ZH, tmp1
ijmp
handle_map:
rjmp handle_auth
;rjmp handle_authed
rjmp handle_change
rjmp handle_authed
rjmp handle_failed
handle_state:
push tmp0
ldi tmp0, HANDLE_STATE_MASK
neg tmp0
and ret0, tmp0
or ret0, par0
pop tmp0
ret
handle_blink:
sbrs par0, 7
rjmp handle_blink_low
rjmp handle_blink_high
handle_blink_low:
push par0
push par1
andi par0, 0b00000011
ldi par1, 0x0F
rcall display
pop par1
pop par0
ori ret0, 0b10000000
ret
handle_blink_high:
push par0
push par1
push ret0
andi par0, 0b00000011
rcall get_digit
mov par1, ret0
rcall display
pop ret0
pop par1
pop par0
andi ret0, 0b01111111
ret
handle_auth:
rcall handle_blink
cpi par1, 0xF0
breq handle_auth_end
cpi par1, 0x0E
breq handle_auth_left
cpi par1, 0x0F
breq handle_auth_right
cpi par1, 0x0A
breq handle_auth_submit
cpi par1, 0x0B
breq handle_auth_illegal_key
cpi par1, 0x0C
breq handle_auth_illegal_key
cpi par1, 0x0D
breq handle_auth_illegal_key
push par0
andi par0, 0b00000011
rcall set_digit
rcall display
inc par0
andi par0, 0b00000011
andi ret0, 0b11111100
or ret0, par0
pop par0
rjmp handle_end
handle_auth_illegal_key:
rjmp handle_end
handle_auth_end:
rjmp handle_end
handle_auth_left:
rjmp handle_left
handle_auth_right:
rjmp handle_right
handle_left:
push tmp0
mov tmp0, ret0
andi tmp0, 0b00000011
dec tmp0
andi tmp0, 0b00000011
andi ret0, 0b01111100
or ret0, tmp0
pop tmp0
rjmp handle_end
handle_right:
push tmp0
mov tmp0, ret0
andi tmp0, 0b00000011
inc tmp0
andi tmp0, 0b00000011
andi ret0, 0b01111100
or ret0, tmp0
pop tmp0
rjmp handle_end
handle_auth_submit:
push par0
push ret0
push tmp0
push tmp1
push tmp2
lds tmp0, 0
lds tmp1, 1
; Compare digit 0
mov tmp2, tmp0
lsr tmp2
lsr tmp2
lsr tmp2
lsr tmp2
ldi par0, 0
rcall get_digit
cp tmp2, ret0
brne handle_compare_end
; Compare digit 1
mov tmp2, tmp0
andi tmp2, 0x0F
ldi par0, 1
rcall get_digit
cp tmp2, ret0
brne handle_compare_end
; Compare digit 2
mov tmp2, tmp1
lsr tmp2
lsr tmp2
lsr tmp2
lsr tmp2
ldi par0, 2
rcall get_digit
cp tmp2, ret0
brne handle_compare_end
; Compare digit 3
mov tmp2, tmp1
andi tmp2, 0x0F
ldi par0, 3
rcall get_digit
cp tmp2, ret0
brne handle_compare_end
; All digits match
pop tmp2
pop tmp1
pop tmp0
pop ret0
ldi dig0, 0
ldi dig1, 0
ldi par0, HANDLE_STATE_AUTHED
rcall handle_state
pop par0
rjmp handle_end
handle_compare_end:
pop tmp2
pop tmp1
pop tmp0
pop par0
rjmp handle_failed
handle_authed:
push par0
push par1
ldi par0, 0
ldi par1, 0
rcall display
inc par0
rcall display
inc par0
rcall display
inc par0
rcall display
pop par1
pop par0
cpi par1, 0xF0
breq handle_authed_end
push par0
ldi par0, HANDLE_STATE_CHANGE
cpi par1, 0x0B
brne pc+2
rcall handle_state
ldi par0, HANDLE_STATE_AUTH
cpi par1, 0x0D
brne pc+2
rcall handle_state
pop par0
rjmp handle_end
handle_authed_end:
rjmp handle_end
handle_change:
rcall handle_blink
cpi par1, 0xF0
breq handle_change_end
cpi par1, 0x0E
breq handle_change_left
cpi par1, 0x0F
breq handle_change_right
cpi par1, 0x0A
breq handle_change_submit
cpi par1, 0x0B
breq handle_change_authed
cpi par1, 0x0C
breq handle_change_illegal_key
cpi par1, 0x0D
breq handle_change_logout
push par0
andi par0, 0b00000011
rcall set_digit
rcall display
inc par0
andi par0, 0b00000011
andi ret0, 0b11111100
or ret0, par0
pop par0
rjmp handle_end
handle_change_authed:
push par0
ldi par0, HANDLE_STATE_AUTHED
rcall handle_state
rjmp handle_end
handle_change_illegal_key:
rjmp handle_end
handle_change_left:
rjmp handle_left
handle_change_right:
rjmp handle_right
handle_change_end:
rjmp handle_end
handle_change_logout:
push par0
ldi par0, HANDLE_STATE_AUTH
rcall handle_state
rjmp handle_end
handle_change_submit:
push par0
push par1
push par2
ldi par0, 0
ldi par1, 0
mov par2, dig0
rcall eeprom_write
ldi par0, 1
ldi par1, 0
mov par2, dig1
rcall eeprom_write
pop par2
pop par1
rcall load_code
ldi par0, HANDLE_STATE_AUTHED
rcall handle_state
pop par0
rjmp handle_end
handle_failed:
push par0
push par1
ldi par0, 0
ldi par1, 0x0F
rcall display
inc par0
rcall display
inc par0
rcall display
inc par0
rcall display
push par2
ldi par0, 20
ldi par1, 0xFF
ldi par2, 0xFF
rcall wait
pop par2
pop par1
pop par0
rjmp init
handle_end:
pop tmp1
pop tmp0
ret
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