From 17518b7f3952d1561f32a8fdf600e9a9c1647e12 Mon Sep 17 00:00:00 2001
From: Sergey Yarkov <serzh.yarkov@gmail.com>
Date: Mon, 27 Sep 2021 21:10:15 +0300
Subject: [PATCH] refactor: delay 1 second on 8mhz with ckdiv8 fuse

---
 firmware.asm | 13 +++++++++----
 firmware.hex |  7 +++----
 2 files changed, 12 insertions(+), 8 deletions(-)

diff --git a/firmware.asm b/firmware.asm
index 6843fb0..dd8c0b4 100644
--- a/firmware.asm
+++ b/firmware.asm
@@ -5,7 +5,8 @@
 ; Device: ATtiny24A
 ; Package: 14-pin-PDIP_SOIC
 ; Assembler: gavrasm v5.0
-; Fuses: lfuse: 0xC2, hfuse: 0xDF, efuse: 0xFF, lock:0xFF
+; Clock frequency: 8MHz with CKDIV8
+; Fuses: lfuse: 0x42, hfuse: 0xDF, efuse: 0xFF, lock:0xFF
 ;
 ; Written by Sergey Yarkov 23.09.2021
 
@@ -43,9 +44,13 @@ init_ports:                 ; Init MCU ports
   out LED_DIR, r16          ; Set LED direction to output
 ret
 
-delay_1s:                   ; For 8Mhz frequency 
-.equ outer_count = 71
-.equ inner_count = 28168
+delay_1s:                   ; For 1MHz frequency 
+;
+; Calculate this values of inner and 
+; outer loops count to obtain the desired delay.
+
+.equ outer_count = 100
+.equ inner_count = 2499
 
 ldi r18, outer_count        ; Load outer loop counter value
   _reset:                   ; Load inner loop counter value
diff --git a/firmware.hex b/firmware.hex
index d953834..f047dd7 100644
--- a/firmware.hex
+++ b/firmware.hex
@@ -1,6 +1,5 @@
 :020000020000FC
-:1000000005E5000F000F000F000F00000FED0DBF02
-:1000100006D002D007D0FDCF10271BBB089501E00A
-:100020000ABB089527E488E09EE60197F1F72A9538
-:06003000D1F727E408955A
+:100000000FED0DBF06D002D007D0FDCF10271BBBD0
+:10001000089501E00ABB089524E683EC99E0019776
+:0A002000F1F72A95D1F724E60895C0
 :00000001FF