From 72128564243242351db7443405e91801e8ba9ebe Mon Sep 17 00:00:00 2001
From: Jonathan <2489823+jtlenzz@users.noreply.github.com>
Date: Thu, 10 Jun 2021 04:50:55 -0400
Subject: [PATCH] Change debounce state tables to be defined as constant.
 (#386)

Currently these state tables are being defined in the data section of RAM. As these tables are unchanged, this change allows them to be placed in the text section instead. As they are function local objects, they also get lazy initialized causing references to the dynamic shared object which are unnecessary.
---
 include/etl/debounce.h | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/include/etl/debounce.h b/include/etl/debounce.h
index 21981236..b3787ce5 100644
--- a/include/etl/debounce.h
+++ b/include/etl/debounce.h
@@ -132,7 +132,7 @@ namespace etl
       //*************************************************************************
       /// Gets the next state based on the inputs.
       //*************************************************************************
-      void get_next(bool sample, bool condition_set, bool condition_clear, uint_least8_t state_table[][2])
+      void get_next(bool sample, bool condition_set, bool condition_clear, const uint_least8_t state_table[][2])
       {
         int index1 = ((flags & STATE) * 2) + (sample ? 1 : 0);
         int index2 = (sample ? (condition_set ? 0 : 1) : (condition_clear ? 0 : 1));
@@ -182,7 +182,7 @@ namespace etl
       //*************************************************************************
       void set_state(bool sample, bool condition_set, bool condition_clear)
       {
-        static uint_least8_t state_table[4][2] =
+        static ETL_CONSTANT uint_least8_t state_table[4][2] =
         {
           /* OFF 0 */{ debounce_base::OFF, debounce_base::OFF },
           /* OFF 1 */{ debounce_base::ON,  debounce_base::OFF },
@@ -260,7 +260,7 @@ namespace etl
       //*************************************************************************
       void set_state(bool sample, bool condition_set, bool condition_clear)
       {
-        static uint_least8_t state_table[6][2] =
+        static ETL_CONSTANT uint_least8_t state_table[6][2] =
         {
           /* OFF  0 */{ debounce_base::OFF,  debounce_base::OFF },
           /* OFF  1 */{ debounce_base::ON,   debounce_base::OFF },
@@ -347,7 +347,7 @@ namespace etl
       //*************************************************************************
       void set_state(bool sample, bool condition_set, bool condition_clear)
       {
-        static uint_least8_t state_table[8][2] =
+        static ETL_CONSTANT uint_least8_t state_table[8][2] =
         {
           /* OFF       0 */{ debounce_base::OFF,       debounce_base::OFF },
           /* OFF       1 */{ debounce_base::ON,        debounce_base::OFF },