bubble/attiny24a_memory-led-game
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feat: simple state machine

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This commit is contained in:
Sergey Yarkov 2021-09-30 22:30:42 +03:00
parent 3f3c4e41a5
commit affdc0f05f
2 changed files with 105 additions and 70 deletions
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147
firmware.asm
View File

@ -37,23 +37,75 @@
.equ BUZZ_PORT = PORTB
.equ BUZZ_PIN = PINB2
;
; States constants
.equ INIT_STATE = 0x01
.equ SHOWING_STATE = 0x02
.equ POLLING_STATE = 0x03
.equ COMPLETION_STATE = 0x04
.macro init_stack_p ; Setup stack pointer
ldi @0, low(@1)
out SPL, @0
.endm
.org 0x00 ; Start program at 0x00
.cseg ; Code segment
.macro outi ; Out to i/o reg
push r16
ldi r16, @1
out @0, r16
pop r16
.endm
main: ; Start up program
init_stack_p r16, RAMEND
rcall init_ports ; Initialize MCU ports
.macro stsi ; Write to SRAM
push r16
ldi r16, @1
sts @0, r16
pop r16
.endm
.macro set_state
push r16
lds r16, CURRENT_STATE_ADDRESS
sts PREVIOUS_STATE_ADDRESS, r16
stsi CURRENT_STATE_ADDRESS, @0
pop r16
.endm
.dseg ; Data segment
.org SRAM_START
CURRENT_STATE_ADDRESS: .byte 0x01
PREVIOUS_STATE_ADDRESS: .byte 0x02
.cseg ; Code segment
.org 0x00 ; Start program at 0x00
setup: ; Setup program
init_stack_p r16, RAMEND ; Init stack pointer of MCU
set_state INIT_STATE ; Turn MCU state to initialization
loop: ; Program loop
rcall effect_1
rjmp loop
lds r16, CURRENT_STATE_ADDRESS
init: ; Init state
cpi r16, INIT_STATE
brne showing
rcall MCU_Init
set_state SHOWING_STATE
showing: ; Showing state
cpi r16, SHOWING_STATE
brne polling
rcall effect_1
polling: ; Polling state
cpi r16, POLLING_STATE
brne completion
completion:
cpi r16, COMPLETION_STATE ; Completion state
brne default
default: ; Do nothing
rjmp loop
effect_1:
effect_1: ; Shift bits of an leds in port every 50ms
push r17
push r18
push r19
@ -61,12 +113,8 @@ effect_1:
in r20, LED_PORT
;
; Set first led to high
ldi r17, 0xf1
out LED_PORT, r17
outi LED_PORT, 0xf1
rcall delay_50ms
ldi r17, 0x01
ldi r19, 3
_eff_1_shift_l: ; Shift bits to left loop
@ -78,21 +126,14 @@ effect_1:
dec r19
brne _eff_1_shift_l
;
; Set first led to high
ldi r17, 0xf8
out LED_PORT, r17
outi LED_PORT, 0xf8
rcall delay_50ms
;
; Shift remaining bits
ldi r17, 0xf8
ldi r17, 0x08
ldi r19, 3
_eff_1_shift_r:
_eff_1_shift_r: ; Shift bits to right loop
ldi r18, 0xf0
lsr r17
sub r18, r17
add r18, r17
out LED_PORT, r18
rcall delay_50ms
dec r19
@ -102,13 +143,19 @@ effect_1:
; Out saved PORT values
out LED_PORT, r20
pop r17
pop r18
pop r19
pop r20
pop r19
pop r18
pop r17
ret
MCU_Init:
rcall init_ports
ret
init_ports: ; Init MCU ports
push r16
; Setup PORTA
ldi r16, 0x0f
out DDRA, r16 ; Set directions of leds and buttons
@ -118,40 +165,24 @@ init_ports: ; Init MCU ports
; Setup PORTB
sbi DDRB, BUZZ_PIN ; Set direction of buzzer pin to output
cbi PORTB, BUZZ_PIN ; Set low signal on buzzer
clr r16
pop r16
ret
delay_1s: ; For 1MHz frequency
.equ outer_count = 100
.equ inner_count = 2499
ldi r18, outer_count
_reset_d_1s:
ldi r24, low(inner_count)
ldi r25, high(inner_count)
_loop_d_1s:
sbiw r24, 1
brne _loop_d_1s
dec r18
brne _reset_d_1s
ldi r18, outer_count
ret
delay_50ms:
push r18
push r19
push r18
push r19
ldi r18, 65 ; 1c
ldi r19, 239 ; 1c
_loop_d_50ms:
dec r19 ; 1c
brne _loop_d_50ms ; 2 or 1c = 665c
dec r18 ; 1c
brne _loop_d_50ms ; 2 or 1c
nop
pop r19
pop r18
ldi r18, 65 ; 1c
ldi r19, 239 ; 1c
_loop_d_50ms:
dec r19 ; 1c
brne _loop_d_50ms ; 2 or 1c = 665c
dec r18 ; 1c
brne _loop_d_50ms ; 2 or 1c
nop
pop r19
pop r18
ret
info: .db "Memory led game. Written by Sergey Yarkov 27.09.2021"
info: .db "Memory led game. Written by Sergey Yarkov 27.09.2021"

28
firmware.hex
View File

@ -1,14 +1,18 @@
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