From c4f0d59443708a1b3416d2389eac4dc26a62d7cb Mon Sep 17 00:00:00 2001
From: user <none>
Date: Fri, 7 Jul 2023 15:56:12 -0500
Subject: [PATCH] Detect butten press by level rather than change

This fixes a problem that would cause it to immediately advance
waveforms on startup specifically after being programmed.
---
 siggen.asm | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/siggen.asm b/siggen.asm
index 5661faa..580949b 100644
--- a/siggen.asm
+++ b/siggen.asm
@@ -320,8 +320,8 @@ _adc_wait:
 	; --------------------------------------------------------------
 	; ----- Poll for button presses and swap waveforms
 
-	; Test for pin change interrupt flag
-	sbis	PCIFR, PCIF1
+	; Test for pushbutton pin pulled low
+	sbic	PINC, PINC5
 	rjmp	_button_done
 	; Button pin status has changed
 
-- 
2.43.0