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‎Inc/usb_audio.h

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// usb_audio.h
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// Copyright (c) 2017 Sugioka Y.
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// This file is released under the MIT License.
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// http://opensource.org/licenses/mit-license.php
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#ifndef __USB_AUDIO_H
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#define __USB_AUDIO_H
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//All configurations are declared in usb_audio_dscr.h
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typedef void (*USBAudio_CallbackFunc)(void);
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void USBAudio_Init(PCD_HandleTypeDef *hpcd);
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void USBAudio_DeInit(void);
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void USBAudio_RegisterCallback(USBAudio_CallbackFunc startPlayback,
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USBAudio_CallbackFunc stopPlayback,
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USBAudio_CallbackFunc freqChanged);
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void USBAudio_Start(void);
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void USBAudio_Stop(void);
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//return: Sampling frequency e.g) 44100, 48000
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uint32_t USBAudio_AudioFreq(void);
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//return: Ready to play or not
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uint8_t USBAudio_Enough(void);
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//Get audio packet and increment buffer read addr
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//return: Pointer to audio packet buffer or NULL(buffer is not ready)
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uint8_t* USBAudio_GetPacketBuffer(uint16_t *length);
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//should be called from HAL_PCD_xxCallback function. don't call other anywhere
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void USBAudio_SetupStageCallback(PCD_HandleTypeDef *hpcd);
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void USBAudio_DataOutStageCallback(PCD_HandleTypeDef *hpcd, uint8_t epnum);
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void USBAudio_DataInStageCallback(PCD_HandleTypeDef *hpcd, uint8_t epnum);
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void USBAudio_SOFCallback(PCD_HandleTypeDef *hpcd);
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void USBAudio_ResetCallback(PCD_HandleTypeDef *hpcd);
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void USBAudio_SuspendCallback(PCD_HandleTypeDef *hpcd);
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void USBAudio_ResumeCallback(PCD_HandleTypeDef *hpcd);
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void USBAudio_ISOOUTIncompleteCallback(PCD_HandleTypeDef *hpcd, uint8_t epnum);
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void USBAudio_ISOINIncompleteCallback(PCD_HandleTypeDef *hpcd, uint8_t epnum);
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void USBAudio_ConnectCallback(PCD_HandleTypeDef *hpcd);
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void USBAudio_DisconnectCallback(PCD_HandleTypeDef *hpcd);
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#endif

‎Inc/usb_audio_dscr.h

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// usb_audio_dscr.h
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// Copyright (c) 2017 Sugioka Y.
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// This file is released under the MIT License.
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// http://opensource.org/licenses/mit-license.php
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#include "stm32f1xx_hal.h"
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#ifndef __USB_AUDIO_DSCR_H
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#define __USB_AUDIO_DSCR_H
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#define USB_VID 1155 //STMicroelectronics
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//#define USB_PID 22336 //Test device
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#define USB_PID 22337
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//Attributes
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#define SELF_POWERED 0
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#define REMOTE_WAKEUP 0
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//STM32F103 has 512 bytes PMA
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#define PMA_SIZE 512
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//Control packet size
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#define EP0_PACKET_SIZE 8
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//Audio packet size
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#define AUDIO_PACKET_SIZE 200 //(48+1)*2*2=196
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//Feedback packet size, must be 3
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#define FEEDBACK_PACKET_SIZE 3
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//Audio packet buffering length
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#define AUDIO_BUFFER_LEN 16
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//
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#define FEEDBACK_RATE 5 //1-9, 2^5=32[ms]
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//---------------------------------
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#define USBAUDIO_MANUFACTURER_STRING_DSCR_LEN 38
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#define USBAUDIO_PRODUCT_STRING_DSCR_LEN 36
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#define USBAUDIO_DEVICE_DSCR_LEN 18
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#define USBAUDIO_CONFIGURATION_DSCR_LEN 112
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#define USBAUDIO_MANUFACTURER_STRING_DSCR_ID 1
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#define USBAUDIO_PRODUCT_STRING_DSCR_ID 2
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extern uint8_t USBAudio_Manufacturer_StringDscr[];
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extern uint8_t USBAudio_Product_StringDscr[];
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extern uint8_t USBAudio_DeviceDscr[];
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//extern uint8_t USBAudio_DeviceQualifierDscr[];
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extern uint8_t USBAudio_ConfigurationDscr[];
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#endif

‎Inc/usb_def.h

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// usb_def.h
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// Copyright (c) 2017 Sugioka Y.
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// This file is released under the MIT License.
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// http://opensource.org/licenses/mit-license.php
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#ifndef __USB_DEF_H
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#define __USB_DEF_H
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#ifndef NULL
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#define NULL 0
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#endif
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#ifndef LOBYTE
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#define LOBYTE(x) (x & 0xFF)
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#endif
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#ifndef HIBYTE
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#define HIBYTE(x) ((x >> 8) & 0xFF)
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#endif
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#ifndef MIN
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#define MIN(x,y) (x <= y ? x : y)
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#endif
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#define DEVICE_DSCR 0x01
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#define CONFIGURATION_DSCR 0x02
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#define STRING_DSCR 0x03
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#define INTERFACE_DSCR 0x04
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#define ENDPOINT_DSCR 0x05
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#define DEVICE_QUALIFIER_DSCR 0x06
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#define OTHER_SPEED_CONFIGURATION_DSCR 0x07
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#define EP_TYPE_CONTROL 0
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#define EP_TYPE_ISOCHRONOUS 1
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#define EP_TYPE_BULK 2
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#define EP_TYPE_INTERRUPT 3
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#define USB_REQ_TYPE_STANDARD (0<<5)
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#define USB_REQ_TYPE_CLASS (1<<5)
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#define USB_REQ_TYPE_VENDOR (2<<5)
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#define USB_REQ_TYPE_DEVICE 0
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#define USB_REQ_TYPE_INTERFACE 1
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#define USB_REQ_TYPE_ENDPOINT 2
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#define USB_REQ_STD_SET_ADDRESS 0x05
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#define USB_REQ_STD_GET_DESCRIPTOR 0x06
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#define USB_REQ_STD_SET_DESCRIPTOR 0x07
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#define USB_REQ_STD_CLEAR_FEATURE 0x01
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#define USB_REQ_STD_SET_FEATURE 0x03
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#define USB_REQ_STD_GET_CONFIGURATION 0x08
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#define USB_REQ_STD_SET_CONFIGURATION 0x09
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#define USB_REQ_STD_GET_INTERFACE 0x0A
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#define USB_REQ_STD_SET_INTERFACE 0x0B
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#define USB_REQ_STD_GET_STATUS 0x00
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#define USB_REQ_STD_SYNCH_FRAME 0x0C
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#define USB_REQ_STD_GD_DEVICE 0x01
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#define USB_REQ_STD_GD_CONFIGURATION 0x02
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#define USB_REQ_STD_GD_STRING 0x03
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#define USB_REQ_STD_GD_DEVICE_QUALIFIER 0x06
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#define USB_REQ_STD_GD_OTHER_SPEED_CONFIGURATION 0x07
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#define USB_REQ_STD_FT_REMOTEWAKEUP 0x02
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//Class request
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#define USB_REQ_CLASS_SET_CUR 0x01
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#define USB_REQ_CLASS_GET_CUR 0x81
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#endif

‎Inc/usb_pcd.h

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// usb_pcd.h
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// Copyright (c) 2017 S. Yuya
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// This file is released under the MIT License.
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// http://opensource.org/licenses/mit-license.php
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#ifndef __USB_PCD_H
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#define __USB_PCD_H
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#ifndef NULL
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#define NULL 0
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#endif
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#endif

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