From 691c14362e8169ed2523623f4f788078e59617cd Mon Sep 17 00:00:00 2001
From: Vincent Hamp <vincent.hamp@higaski.at>
Date: Wed, 24 Apr 2024 13:36:58 +0200
Subject: [PATCH] fix: don't use subtractions in CMake preprocessor definitions

---
 CMakeLists.txt | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7fc38cf..522bd9c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -31,10 +31,10 @@ set(DCC_RX_MIN_PREAMBLE_BITS
     10u
     CACHE STRING "Minimum number of preambel bits of decoder")
 set(DCC_RX_DEQUE_SIZE
-    32u-1u
+    31u
     CACHE STRING "Size of the receiver deque of decoder")
 set(DCC_RX_BIDI_DEQUE_SIZE
-    8u-1u
+    7u
     CACHE STRING "Size of the sender deque of decoder")
 set(DCC_TX_MIN_PREAMBLE_BITS
     17u
@@ -43,7 +43,7 @@ set(DCC_TX_MAX_PREAMBLE_BITS
     30u
     CACHE STRING "Maximum number of preambel bits of command station")
 set(DCC_TX_DEQUE_SIZE
-    4u-1u
+    3u
     CACHE STRING "Size of the transmitter deque of command station")
 
 add_library(DCC INTERFACE)