Diff: TLV320/TLV320.h

Revision:

0:3d6892f6384f

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TLV320/TLV320.h	Fri Aug 05 10:07:47 2011 +0000
@@ -0,0 +1,187 @@
+ /******************************************************
+ * TLV320.h: Texas instruments TLV320AIC23B library NXP LPC1768
+ *
+ * Written by:
+ * mbed Team
+ * Ioannis Kedros       -   10th January 2011  
+ * (basic functionality incurred) 
+ * Daniel Worrall       -   15th July 2011
+ * (I2SSlave implementation and API restructuring)
+ *
+ * History
+ * version 2.29
+******************************************************/
+
+#ifndef MBED_TLV320_H
+#define MBED_TLV320_H
+
+#include "mbed.h"
+#include "I2SSlave.h"
+
+/** TLV320 class, defined on the I2C master bus
+*
+*/
+
+class TLV320
+{        
+    public:
+        //constructor
+        /** Create a TLV320 object defined on the I2C port
+        *  
+        * @param sda Serial data pin (p9 or p28)
+        * @param scl Serial clock pin (p10 or p27)
+        * @param addr Object address
+        */
+        TLV320(PinName sda, PinName scl, int addr, PinName tx_sda, PinName tx_ws, PinName clk, PinName rx_sda, PinName rx_ws);
+        /** Power up/down
+        *
+        * @param powerUp 0 = power down, 1 = power up
+        */
+        void power(bool powerUp);
+        /** Overloaded power() function
+        *
+        * @param device Call individual devices to power up/down
+        * Device power      0x00 = On 0x80 = Off
+        * Clock             0x00 = On 0x40 = Off
+        * Oscillator        0x00 = On 0x20 = Off
+        * Outputs           0x00 = On 0x10 = Off
+        * DAC               0x00 = On 0x08 = Off
+        * ADC               0x00 = On 0x04 = Off
+        * Microphone input  0x00 = On 0x02 = Off
+        * Line input        0x00 = On 0x01 = Off
+        */
+        void power(int device);
+        /** Set I2S interface bit length and mode
+        *
+        * @param length Set bit length to 16, 20, 24 or 32 bits
+        * @param mode Set STEREO (0), MONO (1)
+        */
+        void format(char length, bool mode);
+        /** Set sample frequency
+         *
+         * @param frequency Sample frequency of data in Hz
+         * @return Returns an integer 0 = success, -1 = unrecognnised frequency
+         * 
+         * The TLV320 supports the following frequencies: 8kHz, 8.021kHz, 32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz
+         * Default is 44.1kHz
+         */
+        int frequency(int hz);
+        /** Reset TLV320
+        *
+        */
+        void reset(void);
+        /** Start streaming i.e. enable interrupts
+         *
+         * @param mode Enable interrupts for NONE, TRANSMIT only, RECEIVE only, BOTH
+         */
+        void start(int mode);
+        /** Stop streaming i.e. disable all interrupts
+         *
+         */
+        void stop(void);
+        /** Write [length] 32 bit words in buffer to I2S port
+         *
+         * @param *buffer Address of buffer to be written
+         * @param from Start position in buffer to read from
+         * @param length Number of words to be written (MUST not exceed 4)
+         */
+        void write(int *buffer, int from, int length);
+        /** Read 4 x (32bit) words into rxBuffer
+         *
+         */
+        void read(void);
+        /** Attach a void/void function or void/void static member funciton to an interrupt generated by the I2SxxFIFOs
+         *
+         * @param function Function to attach
+         *
+         * e.g. myTlv320Object.attach(&myfunction);
+         * OR   myTlv320Object.attach(&myClass::myStaticMemberFunction);
+         */
+        void attach(void(*fptr)(void));
+        /** Attach a nonstatic void/void member function to an interrupt generated by the I2SxxFIFOs
+         *
+         * @param tptr Object pointer
+         * @param mptr Member function pointer
+         *
+         * e.g. myTlv320Object.attach(&myObject, &myClass::myNonstaticMemberFunction); where myObject is an object of myClass
+         */
+        template<typename T>
+        void attach(T *tptr, void(T::*mptr)(void)){
+            mI2s_.attach(tptr, mptr);
+        }
+                /** Line in volume control i.e. record volume
+        *
+        * @param leftVolumeIn Left line-in volume 
+        * @param rightVolumeIn Right line-in volume
+        * @return Returns 0 for success, -1 if parameters are out of range
+        * Parameters accept a value, where 0.0 < parameter < 1.0 and where 0.0 maps to -34.5dB 
+        * and 1.0 maps to +12dB (0.74 = 0 dB default).
+        */
+        int inputVolume(float leftVolumeIn, float rightVolumeIn);
+        /** Headphone out volume control
+        *
+        * @param leftVolumeOut Left line-out volume
+        * @param rightVolumeOut Right line-out volume
+        * @return Returns 0 for success, -1 if parameters are out of range
+        * Parameters accept a value, where 0.0 < parameter < 1.0 and where 0.0 maps to -73dB (mute) 
+        * and 1.0 maps to +6dB (0.5 = default)
+        */
+        int outputVolume(float leftVolumeOut, float rightVolumeOut);
+       /** Analog audio path control
+        *
+        * @param bypassVar Route analogue audio direct from line in to headphone out
+        */
+        void bypass(bool bypassVar);
+        /**Digital audio path control
+        *
+        * @param softMute Mute output
+        */
+        void mute(bool softMute);
+        //Receive buffer
+        
+        int *rxBuffer;
+        
+    protected:
+        char cmd[2];    //the address and command for TLV320 internal registers
+        int mAddr;      //register write address
+    private:
+        I2C mI2c_;      //MUST use the I2C port
+        I2SSlave mI2s_;
+        Ticker I2sTick;
+        void io(void);   
+       /** Sample rate control
+        *
+        * @param rate Set the sampling rate as per datasheet section 3.3.2
+        * @param clockIn Set the clock in divider MCLK, MCLK_DIV2
+        * @param clockMode Set clock mode CLOCK_NORMAL, CLOCK_USB
+        */
+        void setSampleRate_(char rate, bool clockIn, bool mode, bool bOSR); 
+       /** Digital interface activation
+        *
+        */
+        void activateDigitalInterface_(void);
+        /** Digital interface deactivation
+        *
+        */
+        void deactivateDigitalInterface_(void);
+
+        //TLV320AIC23B register addresses as defined in the TLV320AIC23B datasheet
+        #define LEFT_LINE_INPUT_CHANNEL_VOLUME_CONTROL  (0x00 << 1)
+        #define RIGHT_LINE_INPUT_CHANNEL_VOLUME_CONTROL (0x01 << 1)
+        #define LEFT_CHANNEL_HEADPHONE_VOLUME_CONTROL   (0x02 << 1)
+        #define RIGHT_CHANNEL_HEADPHONE_VOLUME_CONTROL  (0x03 << 1)
+        #define ANALOG_AUDIO_PATH_CONTROL               (0x04 << 1)
+        #define DIGITAL_AUDIO_PATH_CONTROL              (0x05 << 1)
+        #define POWER_DOWN_CONTROL                      (0x06 << 1)
+        #define DIGITAL_AUDIO_INTERFACE_FORMAT          (0x07 << 1)
+        #define SAMPLE_RATE_CONTROL                     (0x08 << 1)
+        #define DIGITAL_INTERFACE_ACTIVATION            (0x09 << 1)
+        #define RESET_REGISTER                          (0x0F << 1)
+        
+        #define CLOCK_NORMAL        0
+        #define CLOCK_USB           1
+        #define MCLK                0
+        #define MCLK_DIV2           1
+};
+
+#endif
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