1fe4406f37
b9e0ea0 Merge commit '7fa9d8bdea3773d1195b04d98fcf27cf48ddd81d' as 'tool/mbed/mbed-sdk' 7fa9d8b Squashed 'tool/mbed/mbed-sdk/' content from commit 7c21ce5 git-subtree-dir: tmk_core git-subtree-split: b9e0ea08cb940de20b3610ecdda18e9d8cd7c552
288 lines
8.1 KiB
C++
288 lines
8.1 KiB
C++
/* Copyright (c) 2010-2011 mbed.org, MIT License
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of this software
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* and associated documentation files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all copies or
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* substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
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* BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef USBAudio_H
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#define USBAudio_H
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/* These headers are included for child class. */
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#include "USBEndpoints.h"
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#include "USBDescriptor.h"
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#include "USBDevice_Types.h"
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#include "USBDevice.h"
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/**
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* USBAudio example
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*
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* @code
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* #include "mbed.h"
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* #include "USBAudio.h"
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*
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* Serial pc(USBTX, USBRX);
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*
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* // frequency: 48 kHz
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* #define FREQ 48000
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*
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* // 1 channel: mono
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* #define NB_CHA 1
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*
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* // 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
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* #define AUDIO_LENGTH_PACKET 48 * 2 * 1
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*
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* // USBAudio
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* USBAudio audio(FREQ, NB_CHA);
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*
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* int main() {
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* int16_t buf[AUDIO_LENGTH_PACKET/2];
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*
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* while (1) {
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* // read an audio packet
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* audio.read((uint8_t *)buf);
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*
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*
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* // print packet received
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* pc.printf("recv: ");
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* for(int i = 0; i < AUDIO_LENGTH_PACKET/2; i++) {
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* pc.printf("%d ", buf[i]);
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* }
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* pc.printf("\r\n");
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* }
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* }
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* @endcode
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*/
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class USBAudio: public USBDevice {
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public:
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/**
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* Constructor
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*
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* @param frequency_in frequency in Hz (default: 48000)
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* @param channel_nb_in channel number (1 or 2) (default: 1)
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* @param frequency_out frequency in Hz (default: 8000)
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* @param channel_nb_out_in channel number (1 or 2) (default: 1)
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* @param vendor_id Your vendor_id
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* @param product_id Your product_id
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* @param product_release Your preoduct_release
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*/
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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);
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/**
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* Get current volume between 0.0 and 1.0
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*
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* @returns volume
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*/
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float getVolume();
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/**
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* 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
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*
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* @param buf pointer on a buffer which will be filled with an audio packet
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*
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* @returns true if successfull
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*/
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bool read(uint8_t * buf);
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/**
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* 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
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*
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* @param buf pointer on a buffer which will be filled if an audio packet is available
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*
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* @returns true if successfull
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*/
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bool readNB(uint8_t * buf);
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/**
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* 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.
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*
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* @param buf pointer on the audio packet which will be sent
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* @returns true if successful
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*/
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bool write(uint8_t * buf);
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/**
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* Write and read an audio packet at the same time (on the same frame)
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*
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* @param buf_read pointer on a buffer which will be filled with an audio packet
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* @param buf_write pointer on the audio packet which will be sent
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* @returns true if successful
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*/
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bool readWrite(uint8_t * buf_read, uint8_t * buf_write);
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/** attach a handler to update the volume
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*
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* @param function Function to attach
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*
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*/
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void attach(void(*fptr)(void)) {
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updateVol.attach(fptr);
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}
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/** Attach a nonstatic void/void member function to update the volume
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*
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* @param tptr Object pointer
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* @param mptr Member function pointer
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*
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*/
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template<typename T>
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void attach(T *tptr, void(T::*mptr)(void)) {
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updateVol.attach(tptr, mptr);
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}
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protected:
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/*
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* Called by USBDevice layer. Set configuration of the device.
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* For instance, you can add all endpoints that you need on this function.
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*
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* @param configuration Number of the configuration
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* @returns true if class handles this request
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*/
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virtual bool USBCallback_setConfiguration(uint8_t configuration);
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/*
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* Called by USBDevice on Endpoint0 request. Warning: Called in ISR context
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* This is used to handle extensions to standard requests
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* and class specific requests
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*
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* @returns true if class handles this request
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*/
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virtual bool USBCallback_request();
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/*
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* Get string product descriptor
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*
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* @returns pointer to the string product descriptor
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*/
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virtual uint8_t * stringIproductDesc();
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/*
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* Get string interface descriptor
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*
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* @returns pointer to the string interface descriptor
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*/
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virtual uint8_t * stringIinterfaceDesc();
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/*
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* Get configuration descriptor
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*
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* @returns pointer to the configuration descriptor
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*/
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virtual uint8_t * configurationDesc();
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/*
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* Called by USBDevice layer. Set interface/alternate of the device.
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*
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* @param interface Number of the interface to be configured
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* @param alternate Number of the alternate to be configured
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* @returns true if class handles this request
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*/
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virtual bool USBCallback_setInterface(uint16_t interface, uint8_t alternate);
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/*
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* Called by USBDevice on Endpoint0 request completion
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* if the 'notify' flag has been set to true. Warning: Called in ISR context
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*
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* In this case it is used to indicate that a HID report has
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* been received from the host on endpoint 0
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*
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* @param buf buffer received on endpoint 0
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* @param length length of this buffer
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*/
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virtual void USBCallback_requestCompleted(uint8_t * buf, uint32_t length);
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/*
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* Callback called on each Start of Frame event
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*/
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virtual void SOF(int frameNumber);
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/*
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* Callback called when a packet is received
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*/
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virtual bool EPISO_OUT_callback();
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/*
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* Callback called when a packet has been sent
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*/
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virtual bool EPISO_IN_callback();
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private:
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// stream available ?
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volatile bool available;
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// interrupt OUT has been received
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volatile bool interruptOUT;
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// interrupt IN has been received
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volatile bool interruptIN;
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// audio packet has been written
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volatile bool writeIN;
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// FREQ
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uint32_t FREQ_OUT;
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uint32_t FREQ_IN;
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// size of the maximum packet for the isochronous endpoint
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uint32_t PACKET_SIZE_ISO_IN;
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uint32_t PACKET_SIZE_ISO_OUT;
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// mono, stereo,...
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uint8_t channel_nb_in;
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uint8_t channel_nb_out;
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// channel config: master, left, right
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uint8_t channel_config_in;
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uint8_t channel_config_out;
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// mute state
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uint8_t mute;
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// Volume Current Value
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uint16_t volCur;
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// Volume Minimum Value
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uint16_t volMin;
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// Volume Maximum Value
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uint16_t volMax;
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// Volume Resolution
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uint16_t volRes;
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// Buffer containing one audio packet (to be read)
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volatile uint8_t * buf_stream_in;
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// Buffer containing one audio packet (to be written)
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volatile uint8_t * buf_stream_out;
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// callback to update volume
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FunctionPointer updateVol;
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// boolean showing that the SOF handler has been called. Useful for readNB.
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volatile bool SOF_handler;
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volatile float volume;
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};
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#endif
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