working audio

FW/leo_muziekdoos_sam51/lib/I2S/I2S.h

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+
+/*!
+ * @file Adafruit_ZeroI2S.h
+ *
+ * This is a library for the I2S peripheral on SAMD21 and SAMD51 devices
+ *
+ * Adafruit invests time and resources providing this open source code,
+ * please support Adafruit and open-source hardware by purchasing
+ * products from Adafruit!
+ *
+ * Written by Dean Miller for Adafruit Industries.
+ *
+ * BSD license, all text here must be included in any redistribution.
+ *
+ */
+
+#ifndef ADAFRUIT_ZEROI2S_H
+#define ADAFRUIT_ZEROI2S_H
+
+#include <Arduino.h>
+
+/**************************************************************************/
+/*!
+    @brief  available I2S slot sizes
+*/
+/**************************************************************************/
+typedef enum _I2SSlotSize {
+  I2S_8_BIT = 0,
+  I2S_16_BIT,
+  I2S_24_BIT,
+  I2S_32_BIT
+} I2SSlotSize;
+
+/**************************************************************************/
+/*!
+    @brief  number of I2S slots to use (stereo)
+*/
+/**************************************************************************/
+#define I2S_NUM_SLOTS 2
+
+/**************************************************************************/
+/*!
+    @brief  Class that stores state and functions for interacting with I2S
+   peripheral on SAMD21 and SAMD51 devices
+*/
+/**************************************************************************/
+class I2S_class {
+public:
+  I2S_class(uint8_t FS_PIN, uint8_t SCK_PIN, uint8_t TX_PIN,
+                   uint8_t RX_PIN);
+  I2S_class();
+  ~I2S_class() {}
+
+  bool begin(I2SSlotSize width, int fs_freq, int mck_mult = 256);
+
+  void enableTx();
+  void disableTx();
+  void enableRx();
+  void disableRx();
+  void enableMCLK();
+  void disableMCLK();
+
+  bool txReady();
+  bool rxReady();
+  void write(int32_t left, int32_t right);
+  void read(int32_t *left, int32_t *right);
+
+private:
+  int8_t _fs, _sck, _tx, _rx;
+#ifndef __SAMD51__
+  int8_t _i2sserializer, _i2sclock;
+#endif
+};
+
+#endif