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https://github.com/sergeyyarkov/attiny24a_memory-led-game.git
synced 2026-10-11 10:18:58 +03:00
feat: simple state machine
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115
firmware.asm
115
firmware.asm
@ -37,23 +37,75 @@
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.equ BUZZ_PORT = PORTB
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.equ BUZZ_PIN = PINB2
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;
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; States constants
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.equ INIT_STATE = 0x01
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.equ SHOWING_STATE = 0x02
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.equ POLLING_STATE = 0x03
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.equ COMPLETION_STATE = 0x04
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.macro init_stack_p ; Setup stack pointer
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ldi @0, low(@1)
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out SPL, @0
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.endm
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.org 0x00 ; Start program at 0x00
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.cseg ; Code segment
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.macro outi ; Out to i/o reg
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push r16
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ldi r16, @1
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out @0, r16
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pop r16
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.endm
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main: ; Start up program
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init_stack_p r16, RAMEND
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rcall init_ports ; Initialize MCU ports
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.macro stsi ; Write to SRAM
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push r16
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ldi r16, @1
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sts @0, r16
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pop r16
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.endm
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.macro set_state
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push r16
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lds r16, CURRENT_STATE_ADDRESS
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sts PREVIOUS_STATE_ADDRESS, r16
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stsi CURRENT_STATE_ADDRESS, @0
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pop r16
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.endm
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.dseg ; Data segment
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.org SRAM_START
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CURRENT_STATE_ADDRESS: .byte 0x01
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PREVIOUS_STATE_ADDRESS: .byte 0x02
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.cseg ; Code segment
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.org 0x00 ; Start program at 0x00
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setup: ; Setup program
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init_stack_p r16, RAMEND ; Init stack pointer of MCU
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set_state INIT_STATE ; Turn MCU state to initialization
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loop: ; Program loop
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lds r16, CURRENT_STATE_ADDRESS
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init: ; Init state
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cpi r16, INIT_STATE
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brne showing
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rcall MCU_Init
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set_state SHOWING_STATE
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showing: ; Showing state
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cpi r16, SHOWING_STATE
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brne polling
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rcall effect_1
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polling: ; Polling state
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cpi r16, POLLING_STATE
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brne completion
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completion:
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cpi r16, COMPLETION_STATE ; Completion state
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brne default
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default: ; Do nothing
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rjmp loop
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effect_1:
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effect_1: ; Shift bits of an leds in port every 50ms
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push r17
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push r18
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push r19
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@ -61,12 +113,8 @@ effect_1:
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in r20, LED_PORT
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;
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; Set first led to high
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ldi r17, 0xf1
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out LED_PORT, r17
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outi LED_PORT, 0xf1
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rcall delay_50ms
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ldi r17, 0x01
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ldi r19, 3
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_eff_1_shift_l: ; Shift bits to left loop
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@ -78,21 +126,14 @@ effect_1:
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dec r19
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brne _eff_1_shift_l
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;
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; Set first led to high
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ldi r17, 0xf8
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out LED_PORT, r17
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outi LED_PORT, 0xf8
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rcall delay_50ms
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;
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; Shift remaining bits
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ldi r17, 0xf8
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ldi r17, 0x08
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ldi r19, 3
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_eff_1_shift_r:
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_eff_1_shift_r: ; Shift bits to right loop
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ldi r18, 0xf0
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lsr r17
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sub r18, r17
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add r18, r17
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out LED_PORT, r18
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rcall delay_50ms
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dec r19
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@ -102,13 +143,19 @@ effect_1:
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; Out saved PORT values
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out LED_PORT, r20
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pop r17
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pop r18
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pop r19
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pop r20
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pop r19
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pop r18
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pop r17
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ret
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MCU_Init:
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rcall init_ports
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ret
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init_ports: ; Init MCU ports
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push r16
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; Setup PORTA
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ldi r16, 0x0f
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out DDRA, r16 ; Set directions of leds and buttons
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@ -118,24 +165,8 @@ init_ports: ; Init MCU ports
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; Setup PORTB
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sbi DDRB, BUZZ_PIN ; Set direction of buzzer pin to output
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cbi PORTB, BUZZ_PIN ; Set low signal on buzzer
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clr r16
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ret
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delay_1s: ; For 1MHz frequency
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.equ outer_count = 100
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.equ inner_count = 2499
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ldi r18, outer_count
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_reset_d_1s:
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ldi r24, low(inner_count)
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ldi r25, high(inner_count)
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_loop_d_1s:
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sbiw r24, 1
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brne _loop_d_1s
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dec r18
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brne _reset_d_1s
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ldi r18, outer_count
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pop r16
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ret
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delay_50ms:
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28
firmware.hex
28
firmware.hex
@ -1,14 +1,18 @@
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:020000020000FC
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:100000000FED0DBF25D001D0FECF1F932F933F934F
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:100010004F934BB311EF1BBB2CD011E033E020EF1B
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:10002000110F210F2BBB25D03A95C9F718EF1BBB39
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:1000300020D018EF33E020EF1695211B2BBB19D0F1
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:100040003A95C9F74BBB1F912F913F914F9108955E
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:100050000FE00ABB02950BBBBA9AC298002708951D
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:1000600024E683EC99E00197F1F72A95D1F724E68D
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:1000700008952F933F9321E43FEE3A95F1F72A95A7
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:10008000E1F700003F912F9108954D656D6F7279F2
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:10009000206C65642067616D652E205772697474E9
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:1000A000656E2062792053657267657920596172A7
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:0E00B0006B6F762032372E30392E32303231DF
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:100000000FED0DBF0F9300916000009361000F93FF
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:1000100001E0009360000F910F91009160000130AA
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:1000200061F43AD00F9300916000009361000F9348
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:1000300002E0009360000F910F91023009F405D0A7
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:10004000033001F4043001F4E8CF1F932F933F9362
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:100050004F934BB30F9301EF0BBB0F9128D011E0DF
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:1000600033E020EF110F210F2BBB21D03A95C9F7B8
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:100070000F9308EF0BBB0F911AD018E033E020EF7D
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:100080001695210F2BBB13D03A95C9F74BBB4F9157
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:100090003F912F911F91089501D008950F930FE084
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:1000A0000ABB02950BBBBA9AC2980F9108952F9381
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:1000B0003F9321E43FEE3A95F1F72A95E1F70000EE
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:1000C0003F912F9108954D656D6F7279206C656435
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:1000D0002067616D652E205772697474656E2062A9
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:1000E0007920536572676579205961726B6F76204C
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:0A00F00032372E30392E3230323113
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:00000001FF
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