From 277216429ec7b00d19919906b95c55ab1f93cf06 Mon Sep 17 00:00:00 2001
From: Holger Wirtz <wirtz@parasitstudio.de>
Date: Thu, 23 May 2019 14:37:27 +0200
Subject: [PATCH] Storing and loading configs implemented.

---
 MicroMDAEPiano.ino | 34 ++++++++++++++++++++++++++++++++++
 UI.hpp             |  2 +-
 config.h           |  2 ++
 3 files changed, 37 insertions(+), 1 deletion(-)

diff --git a/MicroMDAEPiano.ino b/MicroMDAEPiano.ino
index 0df9993..1e0cf70 100644
--- a/MicroMDAEPiano.ino
+++ b/MicroMDAEPiano.ino
@@ -218,6 +218,7 @@ void setup()
   Serial.println(F("<setup end>"));
 
 #if defined (DEBUG) && defined (SHOW_CPU_LOAD_MSEC)
+  Serial.println();
   show_cpu_and_mem_usage();
   cpu_mem_millis = 0;
 #endif
@@ -456,6 +457,37 @@ void set_master_volume(uint8_t value)
    EEPROM HELPER
  ******************************************************************************/
 
+void config_from_eeprom(void)
+{
+  uint32_t checksum;
+  config_t tmp_conf;
+
+  EEPROM_readAnything(EEPROM_CONFIGURATIONS + sizeof(config_t) * (sound - 1), tmp_conf);
+  checksum = crc32((byte*)&tmp_conf + 4, sizeof(tmp_conf) - 4);
+
+#ifdef DEBUG
+  Serial.print(F("EEPROM checksum: 0x"));
+  Serial.print(tmp_conf.checksum, HEX);
+  Serial.print(F(" / 0x"));
+  Serial.print(checksum, HEX);
+#endif
+
+  if (checksum == tmp_conf.checksum)
+  {
+    EEPROM_readAnything(EEPROM_CONFIGURATIONS + sizeof(config_t) * (sound - 1), configuration);
+    Serial.print(F(" - OK, loading config "));
+    Serial.print(sound,DEC);
+  }
+  else
+#ifdef DEBUG
+    Serial.println(F(" - mismatch (or force) -> nothing done!"));
+#endif
+
+#ifdef DEBUG
+    Serial.println();
+#endif
+}
+
 void initial_values_from_eeprom(void)
 {
   uint32_t checksum;
@@ -488,6 +520,8 @@ void initial_values_from_eeprom(void)
 #ifdef DEBUG
   Serial.print(F(" - Master volume: "));
   Serial.println(master_volume, DEC);
+  Serial.print(F("Max configs in EEPROM: "));
+  Serial.println(MAX_SOUNDS);
 #endif
 }
 
diff --git a/UI.hpp b/UI.hpp
index 94e26b6..82a3883 100644
--- a/UI.hpp
+++ b/UI.hpp
@@ -705,7 +705,7 @@ void callback_load_sound_function() {
   menu_system.change_menu(load_sound_menu);
   menu_position[MAIN] = encoder_value[RIGHT_ENCODER];
   encoder_value[RIGHT_ENCODER] = sound;
-  enc[RIGHT_ENCODER].write(sound, 1, 99);
+  enc[RIGHT_ENCODER].write(sound, 1, MAX_SOUNDS);
   menu_system.update();
 }
 
diff --git a/config.h b/config.h
index 0506438..748bdd5 100644
--- a/config.h
+++ b/config.h
@@ -135,6 +135,8 @@
 //* DO NO CHANGE ANYTHING BEYOND IF YOU DON'T KNOW WHAT YOU ARE DOING !!!
 //*************************************************************************************************
 
+#define MAX_SOUNDS min(99,int((4096-EEPROM_CONFIGURATIONS)/sizeof(config_t)))
+
 #define CONTROL_RATE_MS 100
 #define BACK_TO_MAIN_MS 800
 #define STORE_MASTER_VOLUME_MS 5000