fix L/R output, enable oversampling
Fork of TLV320 by
Diff: TLV320.h
- Revision:
- 0:bb2411673898
- Child:
- 1:7e76c6f56169
diff -r 000000000000 -r bb2411673898 TLV320.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/TLV320.h Thu Aug 04 15:04:59 2011 +0000 @@ -0,0 +1,203 @@ +/** +* @author Ioannis Kedros, Daniel Worrall +* +* @section LICENSE +* +* Copyright (c) 2011 mbed +* +* Permission is hereby granted, free of charge, to any person obtaining a copy +* of this software and associated documentation files (the "Software"), to deal +* in the Software without restriction, including without limitation the rights +* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +* copies of the Software, and to permit persons to whom the Software is +* furnished to do so, subject to the following conditions: +* +* The above copyright notice and this permission notice shall be included in +* all copies or substantial portions of the Software. +* +* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +* THE SOFTWARE. +* +* @section DESCRIPTION +* Library for Texas instruments TLV320AIC23B library NXP LPC1768 +* +*/ + +#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 default = 0x07, record requires 0x02 + * + * @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 \ No newline at end of file