From c4469cd6f652b43781781067676303c335c23ce0 Mon Sep 17 00:00:00 2001
From: Aadi Desai <21363892+supleed2@users.noreply.github.com>
Date: Thu, 18 May 2023 16:19:53 +0100
Subject: [PATCH] Flip MSB of square wave, avoid DAC automute

---
 rtl/genSaw.sv | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/rtl/genSaw.sv b/rtl/genSaw.sv
index 2f3eef0..f4e6e14 100644
--- a/rtl/genSaw.sv
+++ b/rtl/genSaw.sv
@@ -39,7 +39,7 @@ always_ff @(posedge clk_48k) // Generate new saw sample on rising edge of 48kHz
   else if (!i_pause) saw <= saw + saw_step; // Add saw_step if not paused (48kHz)
 
 logic [15:0] square;
-always_comb square = {16{saw[15]}}; // Square wave is MSB of saw
+always_comb square = {~saw[15], {15{saw[15]}}}; // Square wave is MSB of saw
 
 logic [15:0] triangle;
 always_comb triangle = saw[15] ? {~saw[14:0], 1'b1} : {saw[14:0], 1'b0}; // Triangle wave calc