From f946ac7a813bac0680cdf5c5fcef5e8a6c0d9192 Mon Sep 17 00:00:00 2001
From: Holger Wirtz <dcoredump@googlemail.com>
Date: Mon, 30 Sep 2019 11:08:17 +0200
Subject: [PATCH] SYSEX loading of voices. Not ready yet.

---
 MicroDexed.ino | 43 +++++++++++++++++++++++++++++++++++++++++++
 config.h       |  2 +-
 2 files changed, 44 insertions(+), 1 deletion(-)

diff --git a/MicroDexed.ino b/MicroDexed.ino
index 59c0d01..8f8ae99 100644
--- a/MicroDexed.ino
+++ b/MicroDexed.ino
@@ -657,11 +657,22 @@ void handleSystemExclusive(byte * sysex, uint len)
   }
   else if (len == 163)
   {
+    int32_t bulk_checksum_calc = 0;
+    int8_t bulk_checksum = sysex[161];
+
     // 1 Voice bulk upload
 #ifdef DEBUG
     Serial.println(F("1 Voice bulk upload"));
 #endif
 
+    if (sysex[162] != 0xf7)
+    {
+#ifdef DEBUG
+      Serial.println(F("E: Found no SysEx end marker."));
+#endif
+      return;
+    }
+
     if ((sysex[3] & 0x7f) != 0)
     {
 #ifdef DEBUG
@@ -678,7 +689,39 @@ void handleSystemExclusive(byte * sysex, uint len)
       return;
     }
 
+    // checksum calculation
+    for (uint8_t i = 0; i < 155 ; i++)
+    {
+      bulk_checksum_calc -= sysex[i + 6];
+    }
+    bulk_checksum_calc &= 0x7f;
 
+    if (bulk_checksum_calc != bulk_checksum)
+    {
+#ifdef DEBUG
+      Serial.print(F("E: Checksum error for one voice [0x"));
+      Serial.print(bulk_checksum, HEX);
+      Serial.print(F("/0x"));
+      Serial.print(bulk_checksum_calc, HEX);
+      Serial.println(F("]"));
+#endif
+      return;
+    }
+
+    // load sysex-data into voice memory
+    uint8_t tmp_data[155];
+    memset(tmp_data, 0, 155 * sizeof(uint8_t));
+
+    for (uint8_t i = 0; i < 155 ; i++)
+    {
+      tmp_data[i] = sysex[i + 6];
+    }
+    strncpy(voice_name, (char *)&tmp_data[145], sizeof(voice_name) - 1);
+    Serial.print(F("Voice ["));
+    Serial.print(voice_name);
+    Serial.print(F("] loaded."));
+    
+    dexed->loadSysexVoice(tmp_data);
   }
 #ifdef DEBUG
   else
diff --git a/config.h b/config.h
index 87a82ed..aa811d7 100644
--- a/config.h
+++ b/config.h
@@ -52,7 +52,7 @@
 
 // AUDIO
 // If nothing is defined PT8211 is used as audio output device!
-#define TEENSY_AUDIO_BOARD 1
+//#define TEENSY_AUDIO_BOARD 1
 //#define TGA_AUDIO_BOARD
 
 //*************************************************************************************************