feat: added simple delay loop

README.md

@@ -1 +1 @@
-##led-blink-example
+...

firmware.asm

@@ -1,3 +1,4 @@
+; 
 ; Project name: led-blink-example
 ; Description: Blink an led every one second
 ; Source code: https://github.com/sergeyyarkov/attiny24a_led-blink-example
@@ -19,20 +20,24 @@
 .equ LED_PORT = PORTA       ; LED Port
 .equ LED_PIN = PINA0        ; LED Pin
 
-.equ delay_cycles = 250 
+.equ oVal = 70
+.equ iVal = 1000
 
 .org 0x00                   ; Start program at 0x00
 .cseg                       ; Code segment
 
-ldi r17, delay_cycles
-ldi r18, delay_cycles
-ldi r19, delay_cycles
-
 main:                       ; Start up program
   init_stack_p r16, RAMEND
   rcall init_ports          ; Initialize MCU ports
+  ldi r18, oVal
+  ldi r24, low(iVal)
+  ldi r25, high(iVal)
 
 loop:                       ; Program loop
+  cbi LED_PORT, LED_PIN
+  rcall delay_loop
+  sbi LED_PORT, LED_PIN
+  rcall delay_loop
   rjmp loop
 
 init_ports:                 ; Init MCU ports
@@ -42,3 +47,8 @@ init_ports:                 ; Init MCU ports
   out LED_DIR, r16
   out LED_PORT, r17
 ret
+
+delay_loop:
+  sbiw r24, 1
+  brne delay_loop
+ret

firmware.hex

@@ -1,4 +1,5 @@
 :020000020000FC
-:100000001AEF2AEF3AEF0FED0DBF01D0FFCF01E05D
+:100000000FED0DBF08D026E488EE93E0D89809D014
-:0A00100010E000000ABB1BBB0895BE
+:10001000D89A07D0FBCF01E010E000000ABB1BBB61
+:0800200008950197F1F708951E
 :00000001FF