Diff: USBHostDac.h

Revision:

0:3a3146f89bcc

Child:

1:9ff4cba6524d

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/USBHostDac.h	Wed Apr 01 10:29:31 2015 +0000
@@ -0,0 +1,98 @@
+/*******************************************************************************
+* DISCLAIMER
+* This software is supplied by Renesas Electronics Corporation and is only
+* intended for use with Renesas products. No other uses are authorized. This
+* software is owned by Renesas Electronics Corporation and is protected under
+* all applicable laws, including copyright laws.
+* THIS SOFTWARE IS PROVIDED "AS IS" AND RENESAS MAKES NO WARRANTIES REGARDING
+* THIS SOFTWARE, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING BUT NOT
+* LIMITED TO WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
+* AND NON-INFRINGEMENT. ALL SUCH WARRANTIES ARE EXPRESSLY DISCLAIMED.
+* TO THE MAXIMUM EXTENT PERMITTED NOT PROHIBITED BY LAW, NEITHER RENESAS
+* ELECTRONICS CORPORATION NOR ANY OF ITS AFFILIATED COMPANIES SHALL BE LIABLE
+* FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES FOR
+* ANY REASON RELATED TO THIS SOFTWARE, EVEN IF RENESAS OR ITS AFFILIATES HAVE
+* BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+* Renesas reserves the right, without notice, to make changes to this software
+* and to discontinue the availability of this software. By using this software,
+* you agree to the additional terms and conditions found by accessing the
+* following link:
+* http://www.renesas.com/disclaimer
+* Copyright (C) 2015 Renesas Electronics Corporation. All rights reserved.
+*******************************************************************************/
+
+#ifndef USBHOSTAUDIO_H
+#define USBHOSTAUDIO_H
+
+#include "USBHostConf.h"
+#include "USBHost.h"
+#include "USBIsochronous.h"
+
+#define USBDAC_DATA_SIZE       (192 * 8)
+
+/**
+ * A class to communicate a USB dac (only 48kHz,16bit,2ch)
+ */
+class USBHostDac : public IUSBEnumerator {
+public:
+
+    /**
+    * Constructor
+    */
+    USBHostDac();
+
+    /**
+     * Try to connect a audio device
+     *
+     * @return true if connection was successful
+     */
+    bool connect();
+
+    /**
+    * Check if a audio is connected
+    *
+    * @returns true if a audio is connected
+    */
+    bool connected();
+
+    /**
+    * Data send : It's sent by the 1536byte unit.
+    *
+    * @param buf pointer on a buffer which will be written
+    * @param len length of the transfer
+    * @param flush if true, less than 1536 bytes of data is sent
+    *
+    * @returns the number of bytes written is returned
+    */
+    uint32_t send(uint8_t* buf, uint32_t len, bool flush = true);
+
+protected:
+    //From IUSBEnumerator
+    virtual void setVidPid(uint16_t vid, uint16_t pid);
+    virtual bool parseInterface(uint8_t intf_nb, uint8_t intf_class, uint8_t intf_subclass, uint8_t intf_protocol); //Must return true if the interface should be parsed
+    virtual bool useEndpoint(uint8_t intf_nb, ENDPOINT_TYPE type, ENDPOINT_DIRECTION dir); //Must return true if the endpoint will be used
+
+private:
+    USBHost * host;
+    USBDeviceConnected * dev;
+
+    bool dev_connected;
+    bool audio_device_found;
+    int audio_intf;
+    int audio_intf_cnt;
+
+    IsochronousEp* m_isoEp;
+    uint16_t wMaxPacketSize;
+    uint8_t  bEndpointAddress;
+    uint8_t  bInterfaceNumber;
+    uint8_t  bAlternateSetting;
+    uint8_t* p_rest_data;
+    uint32_t rest_data_index;
+
+    void init();
+    void onDisconnect();
+    bool chkAudioStreaming();
+    USB_TYPE setInterface(uint16_t alt, uint16_t index);
+    void setSamplingRate(uint32_t sampling_rate);
+};
+#endif