/** * @file main.c * @brief * * Copyright (c) 2021 Bouffalolab team * * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. The * ASF licenses this file to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the * License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the * License for the specific language governing permissions and limitations * under the License. * */ #include "bflb_platform.h" #include "hal_usb.h" #include "usbd_core.h" #include "usbd_audio.h" #include "hal_dma.h" #include "hal_i2s.h" #include "hal_dma.h" #include "bsp_es8388.h" #define USBD_VID 0xffff #define USBD_PID 0xffff #define USBD_MAX_POWER 100 #define USBD_LANGID_STRING 1033 #define AUDIO_IN_EP 0x81 #define AUDIO_OUT_EP 0x02 #define USB_HID_CONFIG_DESC_SIZ 34 #define HID_MOUSE_REPORT_DESC_SIZE 74 /* AUDIO Class Config */ #define USBD_AUDIO_FREQ 16000U #define AUDIO_SAMPLE_FREQ(frq) (uint8_t)(frq), (uint8_t)((frq >> 8)), (uint8_t)((frq >> 16)) /* AudioFreq * DataSize (2 bytes) * NumChannels (Stereo: 2) */ #define AUDIO_OUT_PACKET ((uint32_t)((USBD_AUDIO_FREQ * 2 * 2) / 1000)) /* 16bit(2 Bytes) 双声道(Mono:2) */ #define AUDIO_IN_PACKET ((uint32_t)((USBD_AUDIO_FREQ * 2 * 2) / 1000)) #define MIC_IT_ID 0x01 #define MIC_FU_ID 0x02 #define MIC_OT_ID 0x03 #define USB_AUDIO_CONFIG_DESC_SIZ (unsigned long)(9 + \ 9 + \ 10 + \ 12 + \ 12 + \ 9 + \ 9 + \ 10 + \ 9 + \ 9 + \ 9 + \ 7 + \ 11 + \ 9 + \ 7 + \ 9 + \ 9 + \ 7 + \ 11 + \ 9 + \ 7) USB_DESC_SECTION const uint8_t audio_descriptor[] = { USB_DEVICE_DESCRIPTOR_INIT(USB_2_0, 0x00, 0x00, 0x00, USBD_VID, USBD_PID, 0x0001, 0x01), USB_CONFIG_DESCRIPTOR_INIT(USB_AUDIO_CONFIG_DESC_SIZ, 0x03, 0x01, USB_CONFIG_BUS_POWERED, USBD_MAX_POWER), /* ------------------ AudioControl Interface ------------------ */ /* USB Microphone Standard AC Interface Descriptor */ 0x09, /* bLength */ USB_DESCRIPTOR_TYPE_INTERFACE, /* bDescriptorType */ 0x00, /* bInterfaceNumber */ 0x00, /* bAlternateSetting */ 0x00, /* bNumEndpoints */ USB_DEVICE_CLASS_AUDIO, /* bInterfaceClass */ AUDIO_SUBCLASS_AUDIOCONTROL, /* bInterfaceSubClass */ AUDIO_PROTOCOL_UNDEFINED, /* bInterfaceProtocol */ 0x00, /* iInterface */ /* 09 byte*/ /* USB Microphone Class-specific AC Interface Descriptor */ 0x0a, /* bLength */ AUDIO_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType */ AUDIO_CONTROL_HEADER, /* bDescriptorSubtype */ 0x00, /* 1.00 */ /* bcdADC */ 0x01, 0x47, /* wTotalLength */ 0x00, 0x02, /* bInCollection */ 0x01, /* baInterfaceNr */ 0x02, /* baInterfaceNr */ /* 09 byte*/ /* USB Microphone Input Terminal Descriptor */ 0x0C, /* bLength */ AUDIO_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType */ AUDIO_CONTROL_INPUT_TERMINAL, /* bDescriptorSubtype */ 0x02, /* bTerminalID */ 0x01, /* wTerminalType : Microphone 0x0201 */ 0x02, 0x00, /* bAssocTerminal */ 0x02, /* bNrChannels */ 0x01, /* wChannelConfig : Mono sets no position bits */ 0x00, 0x00, /* iChannelNames */ 0x00, /* iTerminal */ /* 12 byte*/ /* USB Microphone Input Terminal Descriptor */ 0x0C, /* bLength */ AUDIO_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType */ AUDIO_CONTROL_INPUT_TERMINAL, /* bDescriptorSubtype */ 0x01, /* bTerminalID */ 0x01, /* wTerminalType : Microphone 0x0101 */ 0x01, 0x00, /* bAssocTerminal */ 0x02, /* bNrChannels */ 0x01, /* wChannelConfig : Mono sets no position bits */ 0x00, 0x00, /* iChannelNames */ 0x00, /* iTerminal */ /* 12 byte*/ /*USB Microphone Output Terminal Descriptor */ 0x09, /* bLength */ AUDIO_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType */ AUDIO_CONTROL_OUTPUT_TERMINAL, /* bDescriptorSubtype */ 0x06, /* bTerminalID */ 0x01, /* wTerminalType : speaker */ 0x03, 0x00, /* bAssocTerminal */ 0x09, /* bSourceID */ 0x00, /* iTerminal */ /* 09 byte*/ /*USB Microphone Output Terminal Descriptor */ 0x09, /* bLength */ AUDIO_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType */ AUDIO_CONTROL_OUTPUT_TERMINAL, /* bDescriptorSubtype */ 0x07, /* bTerminalID */ 0x01, /* wTerminalType : speaker */ 0x01, 0x00, /* bAssocTerminal */ 0x0a, /* bSourceID */ 0x00, /* iTerminal */ /* 09 byte*/ /* USB Microphone Audio Feature Unit Descriptor */ 0x0a, /* bLength */ AUDIO_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType */ AUDIO_CONTROL_FEATURE_UNIT, /* bDescriptorSubtype */ 0x09, /* bUnitID */ 0x01, /* bSourceID */ 0x01, /* bControlSize */ 0x01, /* bmaControls(0) Mute */ 0x02, /* bmaControls(1) Volume */ 0x02, /* bmaControls(2) Volume */ 0x00, /* iFeature */ /* 10 byte*/ /* USB Microphone Audio Feature Unit Descriptor */ 0x09, /* bLength */ AUDIO_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType */ AUDIO_CONTROL_FEATURE_UNIT, /* bDescriptorSubtype */ 0x0a, /* bUnitID */ 0x02, /* bSourceID */ 0x01, /* bControlSize */ 0x43, /* bmaControls(0) Mute */ 0x00, /* bmaControls(1) Volume */ 0x00, /* iFeature */ /* 9 byte*/ /* --------------- AudioStreaming Interface --------------- */ /* USB Microphone Standard AS Interface Descriptor - Audio Streaming Zero Bandwith */ /* Interface 1, Alternate Setting 0 */ 0x09, /* bLength */ USB_DESCRIPTOR_TYPE_INTERFACE, /* bDescriptorType */ 0x01, /* bInterfaceNumber */ 0x00, /* bAlternateSetting */ 0x00, /* bNumEndpoints */ USB_DEVICE_CLASS_AUDIO, /* bInterfaceClass */ AUDIO_SUBCLASS_AUDIOSTREAMING, /* bInterfaceSubClass */ AUDIO_PROTOCOL_UNDEFINED, /* bInterfaceProtocol */ 0x00, /* iInterface */ /* 09 byte*/ /* USB Microphone Standard AS Interface Descriptor - Audio Streaming Operational */ /* Interface 1, Alternate Setting 1 */ 0x09, /* bLength */ USB_DESCRIPTOR_TYPE_INTERFACE, /* bDescriptorType */ 0x01, /* bInterfaceNumber */ 0x01, /* bAlternateSetting */ 0x01, /* bNumEndpoints */ USB_DEVICE_CLASS_AUDIO, /* bInterfaceClass */ AUDIO_SUBCLASS_AUDIOSTREAMING, /* bInterfaceSubClass */ AUDIO_PROTOCOL_UNDEFINED, /* bInterfaceProtocol */ 0x00, /* iInterface */ /* 09 byte*/ /* USB Microphone Class-specific AS General Interface Descriptor */ 0X07, /* bLength */ AUDIO_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType */ AUDIO_STREAMING_GENERAL, /* bDescriptorSubtype */ 0x01, /* bTerminalLink : Unit ID of the Output Terminal*/ 0x01, /* bDelay */ 0x01, /* wFormatTag : AUDIO_FORMAT_PCM */ 0x00, /* 07 byte*/ /* USB Microphone Audio Type I Format Type Descriptor */ 0x0b, /* bLength */ AUDIO_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType */ AUDIO_STREAMING_FORMAT_TYPE, /* bDescriptorSubtype */ AUDIO_FORMAT_TYPE_I, /* bFormatType */ 0x02, /* bNrChannels */ 0x02, /* bSubFrameSize : 2 Bytes per audio subframe */ 0x10, /* bBitResolution : 16 bits per sample */ 0x01, /* bSamFreqType : only one frequency supported */ AUDIO_SAMPLE_FREQ(USBD_AUDIO_FREQ), /* tSamFreq : Audio sampling frequency coded on 3 bytes */ /* 11 byte*/ /* USB Microphone Standard AS Audio Data Endpoint Descriptor */ 0x09, /* bLength */ USB_DESCRIPTOR_TYPE_ENDPOINT, /* bDescriptorType */ AUDIO_OUT_EP, /* bEndpointAddress : IN endpoint 1 */ 0x01, /* bmAttributes */ LO_BYTE(AUDIO_OUT_PACKET), /* wMaxPacketSize */ HI_BYTE(AUDIO_OUT_PACKET), 0x01, /* bInterval : one packet per frame */ 0x00, /* bRefresh */ 0x00, /* bSynchAddress */ /* 09 byte*/ /* USB Microphone Class-specific Isoc. Audio Data Endpoint Descriptor */ 0x07, /* bLength */ AUDIO_ENDPOINT_DESCRIPTOR_TYPE, /* bDescriptorType */ AUDIO_ENDPOINT_GENERAL, /* bDescriptor */ 0x00, /* bmAttributes AUDIO_SAMPLING_FREQ_CONTROL */ 0x00, /* bLockDelayUnits */ 0x00, /* wLockDelay */ 0x00, /* 07 byte*/ /* --------------- AudioStreaming Interface --------------- */ /* USB Microphone Standard AS Interface Descriptor - Audio Streaming Zero Bandwith */ /* Interface 1, Alternate Setting 0 */ 0x09, /* bLength */ USB_DESCRIPTOR_TYPE_INTERFACE, /* bDescriptorType */ 0x02, /* bInterfaceNumber */ 0x00, /* bAlternateSetting */ 0x00, /* bNumEndpoints */ USB_DEVICE_CLASS_AUDIO, /* bInterfaceClass */ AUDIO_SUBCLASS_AUDIOSTREAMING, /* bInterfaceSubClass */ AUDIO_PROTOCOL_UNDEFINED, /* bInterfaceProtocol */ 0x00, /* iInterface */ /* 09 byte*/ /* USB Microphone Standard AS Interface Descriptor - Audio Streaming Operational */ /* Interface 1, Alternate Setting 1 */ 0x09, /* bLength */ USB_DESCRIPTOR_TYPE_INTERFACE, /* bDescriptorType */ 0x02, /* bInterfaceNumber */ 0x01, /* bAlternateSetting */ 0x01, /* bNumEndpoints */ USB_DEVICE_CLASS_AUDIO, /* bInterfaceClass */ AUDIO_SUBCLASS_AUDIOSTREAMING, /* bInterfaceSubClass */ AUDIO_PROTOCOL_UNDEFINED, /* bInterfaceProtocol */ 0x00, /* iInterface */ /* 09 byte*/ /* USB Microphone Class-specific AS General Interface Descriptor */ 0X07, /* bLength */ AUDIO_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType */ AUDIO_STREAMING_GENERAL, /* bDescriptorSubtype */ 0x07, /* bTerminalLink : Unit ID of the Output Terminal*/ 0x01, /* bDelay */ 0x01, /* wFormatTag : AUDIO_FORMAT_PCM */ 0x00, /* 07 byte*/ /* USB Microphone Audio Type I Format Type Descriptor */ 0x0b, /* bLength */ AUDIO_INTERFACE_DESCRIPTOR_TYPE, /* bDescriptorType */ AUDIO_STREAMING_FORMAT_TYPE, /* bDescriptorSubtype */ AUDIO_FORMAT_TYPE_I, /* bFormatType */ 0x02, /* bNrChannels */ 0x02, /* bSubFrameSize : 2 Bytes per audio subframe */ 0x10, /* bBitResolution : 16 bits per sample */ 0x01, /* bSamFreqType : only one frequency supported */ AUDIO_SAMPLE_FREQ(USBD_AUDIO_FREQ), /* tSamFreq : Audio sampling frequency coded on 3 bytes */ /* 11 byte*/ /* USB Microphone Standard AS Audio Data Endpoint Descriptor */ 0x09, /* bLength */ USB_DESCRIPTOR_TYPE_ENDPOINT, /* bDescriptorType */ AUDIO_IN_EP, /* bEndpointAddress : IN endpoint 1 */ 0x01, /* bmAttributes */ LO_BYTE(AUDIO_IN_PACKET), /* wMaxPacketSize */ HI_BYTE(AUDIO_IN_PACKET), 0x01, /* bInterval : one packet per frame */ 0x00, /* bRefresh */ 0x00, /* bSynchAddress */ /* 09 byte*/ /* USB Microphone Class-specific Isoc. Audio Data Endpoint Descriptor */ 0x07, /* bLength */ AUDIO_ENDPOINT_DESCRIPTOR_TYPE, /* bDescriptorType */ AUDIO_ENDPOINT_GENERAL, /* bDescriptor */ 0x00, /* bmAttributes AUDIO_SAMPLING_FREQ_CONTROL */ 0x00, /* bLockDelayUnits */ 0x00, /* wLockDelay */ 0x00, /* 07 byte*/ /////////////////////////////////////// /// string0 descriptor /////////////////////////////////////// USB_LANGID_INIT(USBD_LANGID_STRING), /////////////////////////////////////// /// string1 descriptor /////////////////////////////////////// 0x12, /* bLength */ USB_DESCRIPTOR_TYPE_STRING, /* bDescriptorType */ 'B', 0x00, /* wcChar0 */ 'o', 0x00, /* wcChar1 */ 'u', 0x00, /* wcChar2 */ 'f', 0x00, /* wcChar3 */ 'f', 0x00, /* wcChar4 */ 'a', 0x00, /* wcChar5 */ 'l', 0x00, /* wcChar6 */ 'o', 0x00, /* wcChar7 */ /////////////////////////////////////// /// string2 descriptor /////////////////////////////////////// 0x28, /* bLength */ USB_DESCRIPTOR_TYPE_STRING, /* bDescriptorType */ 'B', 0x00, /* wcChar0 */ 'o', 0x00, /* wcChar1 */ 'u', 0x00, /* wcChar2 */ 'f', 0x00, /* wcChar3 */ 'f', 0x00, /* wcChar4 */ 'a', 0x00, /* wcChar5 */ 'l', 0x00, /* wcChar6 */ 'o', 0x00, /* wcChar7 */ ' ', 0x00, /* wcChar8 */ 'A', 0x00, /* wcChar9 */ 'U', 0x00, /* wcChar10 */ 'D', 0x00, /* wcChar11 */ 'I', 0x00, /* wcChar12 */ 'O', 0x00, /* wcChar13 */ ' ', 0x00, /* wcChar14 */ 'D', 0x00, /* wcChar15 */ 'E', 0x00, /* wcChar16 */ 'M', 0x00, /* wcChar17 */ 'O', 0x00, /* wcChar18 */ /////////////////////////////////////// /// string3 descriptor /////////////////////////////////////// 0x16, /* bLength */ USB_DESCRIPTOR_TYPE_STRING, /* bDescriptorType */ '2', 0x00, /* wcChar0 */ '0', 0x00, /* wcChar1 */ '2', 0x00, /* wcChar2 */ '1', 0x00, /* wcChar3 */ '0', 0x00, /* wcChar4 */ '3', 0x00, /* wcChar5 */ '1', 0x00, /* wcChar6 */ '0', 0x00, /* wcChar7 */ '0', 0x00, /* wcChar8 */ '0', 0x00, /* wcChar9 */ #ifdef CONFIG_USB_HS /////////////////////////////////////// /// device qualifier descriptor /////////////////////////////////////// 0x0a, USB_DESCRIPTOR_TYPE_DEVICE_QUALIFIER, 0x00, 0x02, 0x00, 0x00, 0x00, 0x40, 0x01, 0x00, #endif 0x00 }; struct device *usb_fs; static uint8_t play_status = 0; static usbd_class_t audio_class; static usbd_interface_t audio_control_intf; static usbd_interface_t audio_stream_intf; static usbd_interface_t audio_stream_intf2; struct device *i2s; struct device *dma_ch2_i2s_tx, *dma_ch3_i2s_rx; #define BUFF_SIZE (512) volatile static uint8_t record_buff_using_num = 0, record_updata_flag = 0; static uint8_t record_data_buff[2][BUFF_SIZE + 128] __attribute__((section(".system_ram"), aligned(4))); volatile static uint8_t play_buff_using_num = 0, play_updata_flag = 0; static uint8_t play_data_buff[2][BUFF_SIZE + 128] __attribute__((section(".system_ram"), aligned(4))); static uint8_t vol_change_flag = 0; static ES8388_Cfg_Type ES8388Cfg = { .work_mode = ES8388_CODEC_MDOE, /*!< ES8388 work mode */ .role = ES8388_SLAVE, /*!< ES8388 role */ .mic_input_mode = ES8388_DIFF_ENDED_MIC, /*!< ES8388 mic input mode */ .mic_pga = ES8388_MIC_PGA_9DB, /*!< ES8388 mic PGA */ .i2s_frame = ES8388_LEFT_JUSTIFY_FRAME, /*!< ES8388 I2S frame */ .data_width = ES8388_DATA_LEN_16, /*!< ES8388 I2S dataWitdh */ }; static uint32_t usb_data_offset = 0; static uint8_t out_buffer[64]; void usbd_audio_out_callback(uint8_t ep) { uint32_t actual_read_length = 0; int n; if (!play_updata_flag) { n = usbd_ep_read(ep, &play_data_buff[!play_buff_using_num][usb_data_offset], 64, &actual_read_length); } else { n = usbd_ep_read(ep, out_buffer, 64, &actual_read_length); } if (n < 0) { usbd_ep_set_stall(ep); return; } else { if (!play_updata_flag) { usb_data_offset += actual_read_length; /* The data is enough */ if (usb_data_offset >= BUFF_SIZE) { play_updata_flag = 1; usb_data_offset = 0; } } else { /* too much data */ MSG("wait_flag\r\n"); } } } void usbd_audio_set_interface_callback(uint8_t value) { if (value) { play_status = 1; device_control(usb_fs, DEVICE_CTRL_USB_DC_SET_ACK, (void *)0x81); device_control(usb_fs, DEVICE_CTRL_USB_DC_SET_ACK, (void *)0x2); MSG("OPEN\r\n"); } else { play_status = 0; usb_data_offset = 0; MSG("CLOSE\r\n"); } } static usbd_endpoint_t audio_out_ep = { .ep_cb = usbd_audio_out_callback, .ep_addr = AUDIO_OUT_EP }; void usbd_audio_set_volume(uint8_t vol) { vol_change_flag = vol; } extern struct device *usb_dc_init(void); struct device *dma_ch4_usb_tx; static void dma_ch2_i2s_tx_irq_callback(struct device *dev, void *args, uint32_t size, uint32_t state) { // if (play_updata_flag) { // MSG("data ok\r\n"); // play_buff_using_num = !play_buff_using_num; // device_write(i2s, 0, play_data_buff[play_buff_using_num], BUFF_SIZE); // play_updata_flag = 0; // play_wait_data_flag = 0; // } else { // play_wait_data_flag = 1; // MSG("data err\r\n"); // } return; } static void dma_ch3_i2s_rx_irq_callback(struct device *dev, void *args, uint32_t size, uint32_t state) { record_updata_flag = 1; // record_buff_using_num = !record_buff_using_num; // device_read(i2s, 0, record_data_buff[record_buff_using_num], BUFF_SIZE); return; } void audio_init() { /* init ES8388 Codec */ ES8388_Init(&ES8388Cfg); //ES8388_Reg_Dump(); ES8388_Set_Voice_Volume(60); /* register & open i2s device */ i2s_register(I2S0_INDEX, "I2S"); i2s = device_find("I2S"); if (i2s) { I2S_DEV(i2s)->iis_mode = I2S_MODE_MASTER; I2S_DEV(i2s)->interface_mode = I2S_MODE_LEFT; I2S_DEV(i2s)->sampl_freq_hz = 16 * 1000; I2S_DEV(i2s)->channel_num = I2S_FS_CHANNELS_NUM_2; I2S_DEV(i2s)->frame_size = I2S_FRAME_LEN_16; I2S_DEV(i2s)->data_size = I2S_DATA_LEN_16; I2S_DEV(i2s)->fifo_threshold = 3; device_open(i2s, DEVICE_OFLAG_DMA_TX | DEVICE_OFLAG_DMA_RX); } /* register & open dma device */ dma_register(DMA0_CH2_INDEX, "dma_ch2_i2s_tx"); dma_ch2_i2s_tx = device_find("dma_ch2_i2s_tx"); if (dma_ch2_i2s_tx) { DMA_DEV(dma_ch2_i2s_tx)->direction = DMA_MEMORY_TO_PERIPH; DMA_DEV(dma_ch2_i2s_tx)->transfer_mode = DMA_LLI_ONCE_MODE; DMA_DEV(dma_ch2_i2s_tx)->src_req = DMA_REQUEST_NONE; DMA_DEV(dma_ch2_i2s_tx)->dst_req = DMA_REQUEST_I2S_TX; DMA_DEV(dma_ch2_i2s_tx)->src_width = DMA_TRANSFER_WIDTH_32BIT; DMA_DEV(dma_ch2_i2s_tx)->dst_width = DMA_TRANSFER_WIDTH_32BIT; DMA_DEV(dma_ch2_i2s_tx)->dst_burst_size = DMA_BURST_4BYTE; DMA_DEV(dma_ch2_i2s_tx)->src_burst_size = DMA_BURST_4BYTE; device_open(dma_ch2_i2s_tx, 0); /* connect i2s device and dma device */ device_control(i2s, DEVICE_CTRL_ATTACH_TX_DMA, (void *)dma_ch2_i2s_tx); /* Set the interrupt function, for double buffering*/ device_set_callback(I2S_DEV(i2s)->tx_dma, dma_ch2_i2s_tx_irq_callback); device_control(I2S_DEV(i2s)->tx_dma, DEVICE_CTRL_SET_INT, NULL); } dma_register(DMA0_CH3_INDEX, "dma_ch3_i2s_rx"); dma_ch3_i2s_rx = device_find("dma_ch3_i2s_rx"); if (dma_ch3_i2s_rx) { DMA_DEV(dma_ch3_i2s_rx)->direction = DMA_PERIPH_TO_MEMORY; DMA_DEV(dma_ch3_i2s_rx)->transfer_mode = DMA_LLI_ONCE_MODE; DMA_DEV(dma_ch3_i2s_rx)->src_req = DMA_REQUEST_I2S_RX; DMA_DEV(dma_ch3_i2s_rx)->dst_req = DMA_REQUEST_NONE; DMA_DEV(dma_ch3_i2s_rx)->src_width = DMA_TRANSFER_WIDTH_32BIT; DMA_DEV(dma_ch3_i2s_rx)->dst_width = DMA_TRANSFER_WIDTH_32BIT; DMA_DEV(dma_ch3_i2s_rx)->dst_burst_size = DMA_BURST_4BYTE; DMA_DEV(dma_ch3_i2s_rx)->src_burst_size = DMA_BURST_4BYTE; device_open(dma_ch3_i2s_rx, 0); /* connect i2s device and dma device */ device_control(i2s, DEVICE_CTRL_ATTACH_RX_DMA, (void *)dma_ch3_i2s_rx); /* Set the interrupt function, for double buffering*/ device_set_callback(I2S_DEV(i2s)->rx_dma, dma_ch3_i2s_rx_irq_callback); device_control(I2S_DEV(i2s)->rx_dma, DEVICE_CTRL_SET_INT, NULL); } } int main(void) { bflb_platform_init(0); audio_init(); usbd_desc_register(audio_descriptor); usbd_audio_add_interface(&audio_class, &audio_control_intf); usbd_audio_add_interface(&audio_class, &audio_stream_intf); usbd_audio_add_interface(&audio_class, &audio_stream_intf2); usbd_interface_add_endpoint(&audio_stream_intf, &audio_out_ep); usb_fs = usb_dc_init(); if (usb_fs) { device_control(usb_fs, DEVICE_CTRL_SET_INT, (void *)(USB_EP2_DATA_OUT_IT)); } dma_register(DMA0_CH4_INDEX, "dma_ch4_usb_tx"); dma_ch4_usb_tx = device_find("dma_ch4_usb_tx"); if (dma_ch4_usb_tx) { DMA_DEV(dma_ch4_usb_tx)->direction = DMA_MEMORY_TO_PERIPH; DMA_DEV(dma_ch4_usb_tx)->transfer_mode = DMA_LLI_ONCE_MODE; DMA_DEV(dma_ch4_usb_tx)->src_req = DMA_REQUEST_NONE; DMA_DEV(dma_ch4_usb_tx)->dst_req = DMA_REQUEST_USB_EP1; DMA_DEV(dma_ch4_usb_tx)->src_width = DMA_TRANSFER_WIDTH_8BIT; DMA_DEV(dma_ch4_usb_tx)->dst_width = DMA_TRANSFER_WIDTH_8BIT; DMA_DEV(dma_ch4_usb_tx)->src_burst_size = DMA_BURST_16BYTE; DMA_DEV(dma_ch4_usb_tx)->dst_burst_size = DMA_BURST_1BYTE; device_open(dma_ch4_usb_tx, 0); // device_set_callback(dma_ch4_usb_tx, dma2_irq_callback); // device_control(dma_ch4_usb_tx, DEVICE_CTRL_SET_INT, NULL); device_control(usb_fs, DEVICE_CTRL_ATTACH_TX_DMA, dma_ch4_usb_tx); device_control(usb_fs, DEVICE_CTRL_USB_DC_SET_TX_DMA, (void *)AUDIO_IN_EP); } /* i2s record start */ device_read(i2s, 0, record_data_buff[0], BUFF_SIZE); while (1) { /* Waiting for record data update */ if (record_updata_flag) { if (!device_control(dma_ch4_usb_tx, DMA_CHANNEL_GET_STATUS, NULL)) { device_write(usb_fs, AUDIO_IN_EP, record_data_buff[!record_buff_using_num], BUFF_SIZE); record_updata_flag = 0; record_buff_using_num = !record_buff_using_num; device_read(i2s, 0, record_data_buff[record_buff_using_num], BUFF_SIZE); } } if (play_updata_flag) { device_control(dma_ch2_i2s_tx, DMA_CHANNEL_STOP, NULL); play_buff_using_num = !play_buff_using_num; device_write(i2s, 0, play_data_buff[play_buff_using_num], BUFF_SIZE); play_updata_flag = 0; usb_data_offset = 0; } if (vol_change_flag) { ES8388_Set_Voice_Volume(vol_change_flag); vol_change_flag = 0; } __asm volatile("nop"); __asm volatile("nop"); } }