feat: init ports & effect_1 of leds

.gitignore

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+.vscode
+firmware.asm~
+firmware.pro
+firmware.lst

Makefile

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+MCU = t24
+SRCFILE = firmware
+TARGET = usbasp
+DEVICE = usb
+
+build: $(SRCFILE).asm
+	gavrasm $(SRCFILE)
+
+flash:
+	avrdude -p $(MCU) -c $(TARGET) -P $(DEVICE) -U flash:w:$(SRCFILE).hex:a
+ 
+clean:
+	rm -f $(SRCFILE).asm~ $(SRCFILE).hex $(SRCFILE).obj $(SRCFILE).lst $(SRCFILE).cof

README.md

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+# Memory Led Game
+
+**Device**: ATtiny24A
+
+**Package**: 14-pin-PDIP_SOIC
+
+**Assembler**: gavrasm v5.0
+
+**Clock frequency**: 8MHz with CKDIV8
+
+**Fuses**: lfuse: 0x42, hfuse: 0xDF, efuse: 0xFF, lock:0xFF
+
+**Schematic**:
+
+-

firmware.asm

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+; 
+; Project name: memory-led-game
+; Description: Simple memory game using leds
+; Source code: https://github.com/sergeyyarkov/attiny24a_memory-led-game
+; Device: ATtiny24A
+; Package: 14-pin-PDIP_SOIC
+; Assembler: gavrasm v5.0
+; Clock frequency: 8MHz with CKDIV8
+; Fuses: lfuse: 0x42, hfuse: 0xDF, efuse: 0xFF, lock:0xFF
+;
+; Written by Sergey Yarkov 27.09.2021
+
+.device ATtiny24A           ; Setup device name
+.list                       ; Enable listing
+
+;
+; LEDS constants
+.equ LED_DIR = DDRA     
+.equ LED_PORT = PORTA      
+.equ LED_PIN_0 = PINA0      
+.equ LED_PIN_1 = PINA1      
+.equ LED_PIN_2 = PINA2     
+.equ LED_PIN_3 = PINA3      
+
+;
+; Buttons constants
+.equ BTN_DIR = DDRA
+.equ BTN_PORT = PORTA
+.equ BTN_PIN_4 = PINA4
+.equ BTN_PIN_5 = PINA5
+.equ BTN_PIN_6 = PINA6
+.equ BTN_PIN_7 = PINA7
+
+;
+; Buzzer constants
+.equ BUZZ_DIR = DDRB
+.equ BUZZ_PORT = PORTB
+.equ BUZZ_PIN = PINB2
+
+.macro init_stack_p         ; Setup stack pointer
+  ldi @0, low(@1)
+  out SPL, @0
+.endm
+
+.org 0x00                   ; Start program at 0x00
+.cseg                       ; Code segment
+
+main:                       ; Start up program
+  init_stack_p r16, RAMEND
+  rcall init_ports          ; Initialize MCU ports
+
+loop:                       ; Program loop
+  rcall effect_1
+  rjmp loop
+
+effect_1:
+  push r17
+  push r18
+  push r19
+
+  ;
+  ; Set first led to high
+  ldi r17, 0xf1
+  out LED_PORT, r17
+  rcall delay_100ms
+
+  ;
+  ; Shift remaining bits
+  ldi r17, 0x01
+
+  ;
+  ; Loop counter
+  ldi r19, 3
+
+  effect_1_loop:
+    ldi r18, 0xf0
+    lsl r17
+    add r18, r17
+    out LED_PORT, r18
+    rcall delay_100ms
+    dec r19
+    brne effect_1_loop
+
+  pop r17
+  pop r18
+  pop r19
+ret
+
+init_ports:                 ; Init MCU ports
+  ; Setup PORTA 
+  ldi r16, 0x0f
+  out DDRA, r16             ; Set directions of leds and buttons
+  swap r16
+  out PORTA, r16            ; Set low signal on leds and pull-up on buttons
+
+  ; Setup PORTB
+  sbi DDRB, BUZZ_PIN        ; Set direction of buzzer pin to output
+  cbi PORTB, BUZZ_PIN       ; Set low signal on buzzer
+  clr 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_100ms:
+push r18
+push r19
+
+ldi  r18, 130     ; 1c
+ldi  r19, 222     ; 1c
+  _loop_d_100ms: 
+    dec  r19          ; 1c
+    brne _loop_d_100ms ; 2 or 1c = 665c
+    dec  r18          ; 1c
+    brne _loop_d_100ms ; 2 or 1c
+    nop 
+pop r19
+pop r18              
+ret
+
+info: .db "Memory led game. Written by Sergey Yarkov 27.09.2021"

firmware.hex

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+:020000020000FC
+:100000000FED0DBF15D001D0FECF1F932F933F935F
+:1000100011EF1BBB1ED011E033E020EF110F210FB9
+:100020002BBB17D03A95C9F71F912F913F91089597
+:100030000FE00ABB02950BBBBA9AC298002708953D
+:1000400024E683EC99E00197F1F72A95D1F724E6AD
+:1000500008952F933F9322E83EED3A95F1F72A95C4
+:10006000E1F700003F912F9108954D656D6F727912
+:10007000206C65642067616D652E20577269747409
+:10008000656E2062792053657267657920596172C7
+:0E0090006B6F762032372E30392E32303231FF
+:00000001FF