cal_max 950

include/expression_pedal.h

@@ -24,11 +24,11 @@ private:
     uint8_t midi_channel;
     uint8_t midi_cc;
 
-    static const uint8_t HYSTERESIS = 3;
     static const uint16_t READ_INTERVAL_MS = 5;
     uint32_t last_read_time;
 
     uint16_t current_raw;
+    uint16_t smoothed_raw;
     uint16_t cal_min;
     uint16_t cal_max;
 

src/app_task.cpp

@@ -144,10 +144,7 @@ void AppTask::process_switch_event(uint8_t switch_id, bool pressed) {
             uint8_t cc_num = cc_map[i];
             // Use palette index 127 (magenta) for visible feedback
             uint8_t value = pressed ? 127 : 0;
-            
-            if (pressed) {
-                midi_transport->send_cc(channel, cc_num, value);
-            }
+            midi_transport->send_cc(channel, cc_num, value);
             break;
         }
     }

src/expression_pedal.cpp

@@ -10,8 +10,9 @@ ExpressionPedal::ExpressionPedal(uint8_t adc_pin)
     , midi_cc(4)
     , last_read_time(0)
     , current_raw(0)
+    , smoothed_raw(0)
     , cal_min(36)
-    , cal_max(1180)
+    , cal_max(950)
 {
 }
 
@@ -21,7 +22,8 @@ void ExpressionPedal::begin() {
     pinMode(adc_pin, INPUT);
     delay(10);
     current_raw = analogRead(adc_pin);
-    current_value = adc_to_midi(current_raw);
+    smoothed_raw = current_raw;
+    current_value = adc_to_midi(smoothed_raw);
     last_sent_value = current_value;
     Serial.printf("[EXP] Starting: raw ADC=%d -> MIDI=%d (cal: %d-%d)\n",
                   current_raw, current_value, cal_min, cal_max);
@@ -34,18 +36,19 @@ void ExpressionPedal::update(UsbMidiTransport& midi) {
     last_read_time = now;
 
     current_raw = analogRead(adc_pin);
-    uint8_t new_value = adc_to_midi(current_raw);
+    smoothed_raw = (smoothed_raw * 7 + current_raw + 4) / 8;
+    uint8_t new_value = adc_to_midi(smoothed_raw);
+    current_value = new_value;
 
-    if (new_value > current_value + HYSTERESIS ||
-        new_value + HYSTERESIS < current_value ||
-        (new_value != current_value && (new_value == 0 || new_value == 127))) {
-        current_value = new_value;
-    }
-
-    if (current_value != last_sent_value) {
-        last_sent_value = current_value;
-        midi.send_cc(midi_channel, midi_cc, current_value);
-        Serial.printf("[EXP] CC%d: %d (raw ADC: %d)\n", midi_cc, current_value, current_raw);
+    // Proportional catch-up: send midpoint rounded up each update.
+    // Rejects ±1 stationary jitter but converges to exact value on movement
+    // (e.g., 0→127 converges in ~35ms).
+    if (current_value > last_sent_value + 1) {
+        last_sent_value = (last_sent_value + current_value + 1) / 2;
+        midi.send_cc(midi_channel, midi_cc, last_sent_value);
+    } else if (current_value < last_sent_value - 1) {
+        last_sent_value = (last_sent_value + current_value) / 2;
+        midi.send_cc(midi_channel, midi_cc, last_sent_value);
     }
 }
 

src/main.cpp

@@ -21,7 +21,7 @@ UsbMidiTransport midi_transport;
 AppTask controller(&led_driver, &switch_driver, &midi_transport);
 ExpressionPedal exp_pedal(4);
 
-volatile uint32_t flash_latency = 55; // ms delay to compensate for Loopy Pro rendering
+volatile uint32_t flash_latency = 0;
 volatile uint8_t beats_per_bar = 4;   // change to match your project's time signature
 
 TaskHandle_t midi_task_handle = NULL;