From 6bb5a024ab283b639ddc92d71ff3c9b86eebdcec Mon Sep 17 00:00:00 2001
From: Holger Wirtz <wirtz@parasitstudio.de>
Date: Wed, 12 Aug 2020 14:16:57 +0200
Subject: [PATCH] Added FreeMem() debugging functions.

---
 MicroDexed.ino | 27 +++++++++++++++++++++++++++
 config.h       |  6 +++---
 2 files changed, 30 insertions(+), 3 deletions(-)

diff --git a/MicroDexed.ino b/MicroDexed.ino
index d25539b..4b29701 100644
--- a/MicroDexed.ino
+++ b/MicroDexed.ino
@@ -2162,6 +2162,8 @@ void show_cpu_and_mem_usage(void)
   Serial.print(peak_dexed_value, 1);
   Serial.print(F("|BLOCKSIZE:"));
   Serial.print(AUDIO_BLOCK_SAMPLES, DEC);
+  Serial.print(F("|RAM:"));
+  Serial.print(FreeMem(), DEC);
 
   Serial.print(F("|ACTVOICES:"));
   for (uint8_t instance_id = 0; instance_id < NUM_DEXED; instance_id++)
@@ -2367,4 +2369,29 @@ void SerialPrintFormatInt3(uint8_t num)
   sprintf(buf, "%3d", num);
   Serial.print(buf);
 }
+
+/* From: https://forum.pjrc.com/threads/33443-How-to-display-free-ram */
+extern "C" char* sbrk(int incr);
+uint32_t FreeMem(void)
+{
+  char top;
+  return &top - reinterpret_cast<char*>(sbrk(0));
+}
+/*
+  uint32_t FreeMem(void) { // for Teensy 3.0
+  uint32_t stackTop;
+  uint32_t heapTop;
+
+  // current position of the stack.
+  stackTop = (uint32_t) &stackTop;
+
+  // current position of heap.
+  void* hTop = malloc(1);
+  heapTop = (uint32_t) hTop;
+  free(hTop);
+
+  // The difference is (approximately) the free, available ram.
+  return stackTop - heapTop;
+  }
+*/
 #endif
diff --git a/config.h b/config.h
index cff33c9..4e28fbd 100644
--- a/config.h
+++ b/config.h
@@ -56,7 +56,7 @@
 // sed -i.orig 's/^#define USB_MIDI_SYSEX_MAX 290/#define USB_MIDI_SYSEX_MAX 4104/' /usr/local/arduino-teensy/hardware/teensy/avr/cores/teensy3/usb_midi.h
 //#define USB_MIDI_SYSEX_MAX 4104
 
-#define VERSION "1.0.7"
+#define VERSION "1.0.8"
 
 //*************************************************************************************************
 //* DEVICE SETTINGS
@@ -92,7 +92,7 @@
 //*************************************************************************************************
 //* DEBUG OUTPUT SETTINGS
 //*************************************************************************************************
-//#define DEBUG 1
+#define DEBUG 1
 #define SERIAL_SPEED 230400
 #define SHOW_XRUN 1
 #define SHOW_CPU_LOAD_MSEC 5000
@@ -103,7 +103,7 @@
 #define DEXED_ENGINE DEXED_ENGINE_MODERN // DEXED_ENGINE_MARKI // DEXED_ENGINE_OPL
 
 // Number of Dexed instances
-#define NUM_DEXED 1 // 1 or 2 - nothing else!
+#define NUM_DEXED 2 // 1 or 2 - nothing else!
 // FX-CHAIN ENABLE/DISABLE
 #define USE_FX 1
 // CHORUS parameters