USB device stack
Dependents: mbed_11U24_CapacitorDose_V001
Diff: USBAudio/USBAudio.h
- Revision:
- 72:ff90dd9ad449
- Parent:
- 71:53949e6131f6
--- a/USBAudio/USBAudio.h Thu Jul 27 12:14:04 2017 +0100 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,337 +0,0 @@ -/* Copyright (c) 2010-2011 mbed.org, MIT License -* -* 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. -*/ - -#ifndef USBAudio_H -#define USBAudio_H - -/* These headers are included for child class. */ -#include "USBEndpoints.h" -#include "USBDescriptor.h" -#include "USBDevice_Types.h" - -#include "USBDevice.h" -#include "Callback.h" - -/** -* USBAudio example -* -* @code -* #include "mbed.h" -* #include "USBAudio.h" -* -* Serial pc(USBTX, USBRX); -* -* // frequency: 48 kHz -* #define FREQ 48000 -* -* // 1 channel: mono -* #define NB_CHA 1 -* -* // length of an audio packet: each ms, we receive 48 * 16bits ->48 * 2 bytes. as there is one channel, the length will be 48 * 2 * 1 -* #define AUDIO_LENGTH_PACKET 48 * 2 * 1 -* -* // USBAudio -* USBAudio audio(FREQ, NB_CHA); -* -* int main() { -* int16_t buf[AUDIO_LENGTH_PACKET/2]; -* -* while (1) { -* // read an audio packet -* audio.read((uint8_t *)buf); -* -* -* // print packet received -* pc.printf("recv: "); -* for(int i = 0; i < AUDIO_LENGTH_PACKET/2; i++) { -* pc.printf("%d ", buf[i]); -* } -* pc.printf("\r\n"); -* } -* } -* @endcode -*/ -class USBAudio: public USBDevice { -public: - - /** - * Constructor - * - * @param frequency_in frequency in Hz (default: 48000) - * @param channel_nb_in channel number (1 or 2) (default: 1) - * @param frequency_out frequency in Hz (default: 8000) - * @param channel_nb_out_in channel number (1 or 2) (default: 1) - * @param vendor_id Your vendor_id - * @param product_id Your product_id - * @param product_release Your preoduct_release - */ - USBAudio(uint32_t frequency_in = 48000, uint8_t channel_nb_in = 1, uint32_t frequency_out = 8000, uint8_t channel_nb_out = 1, uint16_t vendor_id = 0x7bb8, uint16_t product_id = 0x1111, uint16_t product_release = 0x0100); - - /** - * Get current volume between 0.0 and 1.0 - * - * @returns volume - */ - float getVolume(); - - /** - * Read an audio packet. During a frame, only a single reading (you can't write and read an audio packet during the same frame)can be done using this method. Warning: Blocking - * - * @param buf pointer on a buffer which will be filled with an audio packet - * - * @returns true if successfull - */ - bool read(uint8_t * buf); - - /** - * Try to read an audio packet. During a frame, only a single reading (you can't write and read an audio packet during the same frame)can be done using this method. Warning: Non Blocking - * - * @param buf pointer on a buffer which will be filled if an audio packet is available - * - * @returns true if successfull - */ - bool readNB(uint8_t * buf); - - /** - * read last received packet if some. - * @param buf pointer on a buffer which will be filled if an audio packet is available - * - * @returns the packet length - */ - uint32_t readSync(uint8_t *buf); - - /** - * Write an audio packet. During a frame, only a single writing (you can't write and read an audio packet during the same frame)can be done using this method. - * - * @param buf pointer on the audio packet which will be sent - * @returns true if successful - */ - bool write(uint8_t * buf); - - /** Audio Jitter value*/ - enum AudioSampleCorrectType { - RemoveOneSample = -1, - NoCorrection = 0, - AddOneSample = 1 - }; - /** - * Write packet in endpoint fifo. assuming tx fifo is empty - * @param buf pointer on the audio packet which will be sent - * @param jitter_nb : AudioSampleCorrecttype - **/ - void writeSync(uint8_t *buf, AudioSampleCorrectType jitter_nb = NoCorrection ); - - /** - * Write and read an audio packet at the same time (on the same frame) - * - * @param buf_read pointer on a buffer which will be filled with an audio packet - * @param buf_write pointer on the audio packet which will be sent - * @returns true if successful - */ - bool readWrite(uint8_t * buf_read, uint8_t * buf_write); - - - /** attach a handler to update the volume - * - * @param function Function to attach - * - */ - void attach(void(*fptr)(void)) { - updateVol.attach(fptr); - } - /** attach a handler to Tx Done - * - * @param function Function to attach - * - */ - void attachTx(void(*fptr)(void)) { - txDone.attach(fptr); - } - /** attach a handler to Rx Done - * - * @param function Function to attach - * - */ - void attachRx(void(*fptr)(void)) { - rxDone.attach(fptr); - } - - /** Attach a nonstatic void/void member function to update the volume - * - * @param tptr Object pointer - * @param mptr Member function pointer - * - */ - template<typename T> - void attach(T *tptr, void(T::*mptr)(void)) { - updateVol.attach(tptr, mptr); - } - template<typename T> - void attachTx(T *tptr, void(T::*mptr)(void)) { - txDone.attach(tptr, mptr); - } - template<typename T> - void attachRx(T *tptr, void(T::*mptr)(void)) { - rxDone.attach(tptr, mptr); - } - - -protected: - - /* - * Called by USBDevice layer. Set configuration of the device. - * For instance, you can add all endpoints that you need on this function. - * - * @param configuration Number of the configuration - * @returns true if class handles this request - */ - virtual bool USBCallback_setConfiguration(uint8_t configuration); - - /* - * Called by USBDevice on Endpoint0 request. Warning: Called in ISR context - * This is used to handle extensions to standard requests - * and class specific requests - * - * @returns true if class handles this request - */ - virtual bool USBCallback_request(); - - /* - * Get string product descriptor - * - * @returns pointer to the string product descriptor - */ - virtual uint8_t * stringIproductDesc(); - - /* - * Get string interface descriptor - * - * @returns pointer to the string interface descriptor - */ - virtual uint8_t * stringIinterfaceDesc(); - - /* - * Get configuration descriptor - * - * @returns pointer to the configuration descriptor - */ - virtual uint8_t * configurationDesc(); - - /* - * Called by USBDevice layer. Set interface/alternate of the device. - * - * @param interface Number of the interface to be configured - * @param alternate Number of the alternate to be configured - * @returns true if class handles this request - */ - virtual bool USBCallback_setInterface(uint16_t interface, uint8_t alternate); - - /* - * Called by USBDevice on Endpoint0 request completion - * if the 'notify' flag has been set to true. Warning: Called in ISR context - * - * In this case it is used to indicate that a HID report has - * been received from the host on endpoint 0 - * - * @param buf buffer received on endpoint 0 - * @param length length of this buffer - */ - virtual void USBCallback_requestCompleted(uint8_t * buf, uint32_t length); - - /* - * Callback called on each Start of Frame event - */ - virtual void SOF(int frameNumber); - - /* - * Callback called when a packet is received - */ - virtual bool EPISO_OUT_callback(); - - /* - * Callback called when a packet has been sent - */ - virtual bool EPISO_IN_callback(); - -private: - - // stream available ? - volatile bool available; - - // interrupt OUT has been received - volatile bool interruptOUT; - - // interrupt IN has been received - volatile bool interruptIN; - - // audio packet has been written - volatile bool writeIN; - - // FREQ - uint32_t FREQ_OUT; - uint32_t FREQ_IN; - - // size of the maximum packet for the isochronous endpoint - uint32_t PACKET_SIZE_ISO_IN; - uint32_t PACKET_SIZE_ISO_OUT; - - // mono, stereo,... - uint8_t channel_nb_in; - uint8_t channel_nb_out; - - // channel config: master, left, right - uint8_t channel_config_in; - uint8_t channel_config_out; - - // mute state - uint8_t mute; - - // Volume Current Value - uint16_t volCur; - - // Volume Minimum Value - uint16_t volMin; - - // Volume Maximum Value - uint16_t volMax; - - // Volume Resolution - uint16_t volRes; - - // Buffer containing one audio packet (to be read) - volatile uint8_t * buf_stream_in; - - // Buffer containing one audio packet (to be written) - volatile uint8_t * buf_stream_out; - - // callback to update volume - Callback<void()> updateVol; - - // callback transmit Done - Callback<void()> txDone; - // callback transmit Done - Callback<void()> rxDone; - - // boolean showing that the SOF handler has been called. Useful for readNB. - volatile bool SOF_handler; - - volatile float volume; - -}; - -#endif