Addition of scratch module

Some little changes

Author: marcel-licence

src/audio_module.h

@@ -41,6 +41,10 @@
 #include <cdt.h>
 #endif
 
+
+#if (defined SAMPLE_BUFFER_SIZE)
+
+
 #define RP2350_USE_I2S_ML_LIB
 
 #ifdef ML_SYNTH_INLINE_DECLARATION
@@ -920,3 +924,4 @@ void Audio_Output(const float *left, const float *right)
 
 #endif // ML_SYNTH_INLINE_DEFINITION
 
+#endif /* #if (defined SAMPLE_BUFFER_SIZE) */

src/i2s_interface.h

@@ -44,7 +44,7 @@
 #endif
 
 
-#ifdef SAMPLE_RATE
+#if ((defined SAMPLE_BUFFER_SIZE) && (defined SAMPLE_RATE))
 
 
 #ifdef ML_SYNTH_INLINE_DECLARATION
@@ -592,7 +592,7 @@ void setup_i2s()
 #endif /* ESP32 */
 
 
-#endif /* SAMPLE_RATE */
+#endif /* #if ((defined SAMPLE_BUFFER_SIZE) && (defined SAMPLE_RATE)) */
 
 
 #endif /* ML_SYNTH_INLINE_DEFINITION */

src/ml_as5600_inline.h

@@ -0,0 +1,201 @@
+/*
+ * Copyright (c) 2024 Marcel Licence
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Dieses Programm ist Freie Software: Sie können es unter den Bedingungen
+ * der GNU General Public License, wie von der Free Software Foundation,
+ * Version 3 der Lizenz oder (nach Ihrer Wahl) jeder neueren
+ * veröffentlichten Version, weiter verteilen und/oder modifizieren.
+ *
+ * Dieses Programm wird in der Hoffnung bereitgestellt, dass es nützlich sein wird, jedoch
+ * OHNE JEDE GEWÄHR,; sogar ohne die implizite
+ * Gewähr der MARKTFÄHIGKEIT oder EIGNUNG FÜR EINEN BESTIMMTEN ZWECK.
+ * Siehe die GNU General Public License für weitere Einzelheiten.
+ *
+ * Sie sollten eine Kopie der GNU General Public License zusammen mit diesem
+ * Programm erhalten haben. Wenn nicht, siehe <https://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @file ml_as5600_inline.h
+ * @author Marcel Licence
+ * @date 20.10.2024
+ *
+ * @brief  Implementation to use the AS5600 for scratching via I2C
+ * @see https://ams.com/documents/20143/36005/AS5600_DS000365_5-00.pdf
+ * @see https://www.youtube.com/watch?v=Ml6VrlV3hvk
+ */
+
+
+#ifdef __CDT_PARSER__
+#include <cdt.h>
+#endif
+
+
+#ifdef AS5600_ENABLED
+
+
+#ifdef ML_SYNTH_INLINE_DECLARATION
+
+
+void AS5600_Setup(void);
+void AS5600_Loop(void);
+
+
+#endif /* ML_SYNTH_INLINE_DECLARATION */
+
+
+#ifdef ML_SYNTH_INLINE_DEFINITION
+
+
+#include <Wire.h>
+
+
+//#define AS5600_DEBUG_ENABLED /* use this to print out some debug messages */
+
+#define AS5600_ADDR 0x36
+
+#define REG_CONF        0x07
+#define REG_RAW_ANGLE   0x0C
+
+
+
+static float pitchOffset = -100.0f;
+static int sumCh = 0;
+
+
+inline
+void AS5600_WriteReg(uint8_t reg, uint8_t value)
+{
+    Wire.beginTransmission(AS5600_ADDR);
+    Wire.write(reg);
+    Wire.write(value);
+    Wire.endTransmission();
+}
+
+inline
+void AS5600_WriteRegU16(uint8_t reg, uint16_t value)
+{
+    Wire.beginTransmission(AS5600_ADDR);
+    Wire.write(reg);
+    Wire.write((value >> 8) & 0xFF);
+    Wire.write(value & 0xFF);
+    Wire.endTransmission();
+}
+
+inline
+uint8_t AS5600_ReadReg(uint8_t reg)
+{
+    Wire.beginTransmission(AS5600_ADDR);
+    Wire.write(reg);
+    Wire.endTransmission();
+
+    Wire.requestFrom(AS5600_ADDR, 1);
+    return Wire.read();
+}
+
+inline
+uint16_t AS5600_ReadReg_u16(uint8_t reg)
+{
+    Wire.beginTransmission(AS5600_ADDR);
+    Wire.write(reg);
+    Wire.endTransmission();
+
+    Wire.requestFrom(AS5600_ADDR, 2);
+    return (((uint16_t)Wire.read()) << 8) + (uint16_t)Wire.read();
+}
+
+void AS5600_Setup(void)
+{
+#ifdef AS5600_DEBUG_ENABLED
+    Serial.printf("CONF: 0x%08x\n", AS5600_ReadReg_u16(REG_CONF));
+#endif
+    AS5600_WriteRegU16(REG_CONF, 0x08); // hyst to 2 LSB to avoid static noise
+#ifdef AS5600_DEBUG_ENABLED
+    Serial.printf("CONF: 0x%08x\n", AS5600_ReadReg_u16(REG_CONF));
+#endif
+}
+
+void AS5600_Loop(void)
+{
+    static uint16_t lastVal = 0;
+    uint16_t newVal = AS5600_ReadReg_u16(REG_RAW_ANGLE);
+    bool valUpdate = false;
+
+    if (newVal > lastVal)
+    {
+        if (newVal - lastVal > 0)
+        {
+            valUpdate = true;
+        }
+    }
+    else
+    {
+        if (lastVal - newVal > 0)
+        {
+            valUpdate = true;
+        }
+    }
+    if (valUpdate)
+    {
+        int ch = ((int)newVal) - ((int)lastVal);
+        if (ch > 2048)
+        {
+            ch -= 4096;
+        }
+        if (ch < -2048)
+        {
+            ch += 4096;
+        }
+#ifdef AS5600_DEBUG_ENABLED
+        Serial.printf("RAW_ANGLE: %d, %d\n", newVal, ch);
+#endif
+        lastVal = newVal;
+        sumCh += ch;
+    }
+}
+
+float AS5600_GetPitch(uint8_t oversample)
+{
+    static float lastPitch = 0;
+    float pitch = sumCh;
+
+    sumCh = 0;
+    pitch *= 0.25f;
+    pitch /= oversample;
+    if (pitch > 50)
+    {
+        pitch = 50;
+    }
+    if (pitch < -50)
+    {
+        pitch = -50;
+    }
+
+    for (int i = 0; i < oversample; i++)
+    {
+        lastPitch = pitch * 0.05 + lastPitch * 0.95;
+    }
+    return max(lastPitch, pitchOffset);
+}
+
+void AS5600_SetPitchOffset(float offset)
+{
+    pitchOffset = offset;
+}
+
+#endif /* ML_SYNTH_INLINE_DEFINITION */
+
+#endif  /* AS5600_ENABLED */

src/ml_inline.h

@@ -53,6 +53,7 @@
 #include <midi_stream_player.h>
 #include <midi_via_ble.h>
 #include <midi_via_usb.h>
+#include <ml_as5600_inline.h>
 #include <ml_board_setup.h>
 #include <ml_scope_oled_inline.h>
 #include <ml_status.h>

src/ml_phaser.h

@@ -44,7 +44,7 @@
 #define SRC_ML_PHASER_H_
 
 
-#include <inttypes.h>
+#include <stdint.h>
 
 
 #define PHASER_AP0 150