Added left encoder as volume pot.

LiquidCrystalPlus_I2C.h

@@ -28,6 +28,8 @@
 #ifndef LIQUIDCRYSTALPLUS_I2C_H_INCLUDED
 #define LIQUIDCRYSTALPLUS_I2C_H_INCLUDED
 
+#define STRING_BUF_SIZE 21
+
 class LiquidCrystalPlus_I2C : public LiquidCrystal_I2C
 {
   public:
@@ -41,7 +43,7 @@ class LiquidCrystalPlus_I2C : public LiquidCrystal_I2C
 
     void show(uint8_t y, uint8_t x, uint8_t fs, long num)
     {
-      char _buf10[64];
+      char _buf10[STRING_BUF_SIZE];
 
       _show(y, x, fs, itoa(num, _buf10, 10), true, true);
     }
@@ -50,7 +52,7 @@ class LiquidCrystalPlus_I2C : public LiquidCrystal_I2C
     void _show(uint8_t pos_y, uint8_t pos_x, uint8_t field_size, char *str, bool justify_right, bool fill_zero)
     {
       {
-        char tmp[64];
+        char tmp[STRING_BUF_SIZE];
         char *s = tmp;
         uint8_t l = strlen(str);
 

MicroDexed.ino

@@ -181,7 +181,7 @@ void setup()
     // load default SYSEX data
     load_sysex(bank, voice);
 #ifdef I2C_DISPLAY
-    enc[0].write(bank);
+    enc[0].write(map(vol*100,0,100,0,20));
     enc[1].write(voice);
     but[0].update();
     but[1].update();

UI.cpp

@@ -29,6 +29,10 @@
 
 #ifdef I2C_DISPLAY // selecting sounds by encoder, button and display
 
+
+enum ui_state {UI_MAIN};
+uint8_t ui_state = UI_MAIN;
+
 void handle_ui(void)
 {
   for (uint8_t i = 0; i < NUM_ENCODER; i++)
@@ -48,6 +52,18 @@ void handle_ui(void)
       continue;
     else
     {
+      switch (i)
+      {
+        case 0: // left encoder moved
+          if (enc[i].read() <= 0)
+            enc[i].write(0);
+          else if (enc[i].read() >= 20)
+            enc[i].write(20);
+          set_volume(float(map(enc[i].read(), 0, 20, 0, 100))/100, vol_left, vol_right);
+          break;
+        case 1: // right encoder moved
+          break;
+      }
 #ifdef DEBUG
       Serial.print(F("Encoder "));
       Serial.print(i, DEC);

UI.h

@@ -34,6 +34,10 @@
 extern Encoder4 enc[2];
 extern int32_t enc_val[2];
 extern Bounce but[2];
+extern float vol_left;
+extern float vol_right;
+
+extern void set_volume(float v, float vr, float vl);
 
 void handle_ui(void);
 /* int32_t getEncPosition(uint8_t encoder_number);