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619 lines
26 KiB
619 lines
26 KiB
/* 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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#include "stdint.h"
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#include "USBAudio.h"
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#include "USBAudio_Types.h"
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USBAudio::USBAudio(uint32_t frequency_in, uint8_t channel_nb_in, uint32_t frequency_out, uint8_t channel_nb_out, uint16_t vendor_id, uint16_t product_id, uint16_t product_release): USBDevice(vendor_id, product_id, product_release) {
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mute = 0;
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volCur = 0x0080;
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volMin = 0x0000;
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volMax = 0x0100;
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volRes = 0x0004;
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available = false;
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FREQ_IN = frequency_in;
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FREQ_OUT = frequency_out;
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this->channel_nb_in = channel_nb_in;
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this->channel_nb_out = channel_nb_out;
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// stereo -> *2, mono -> *1
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PACKET_SIZE_ISO_IN = (FREQ_IN / 500) * channel_nb_in;
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PACKET_SIZE_ISO_OUT = (FREQ_OUT / 500) * channel_nb_out;
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// STEREO -> left and right
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channel_config_in = (channel_nb_in == 1) ? CHANNEL_M : CHANNEL_L + CHANNEL_R;
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channel_config_out = (channel_nb_out == 1) ? CHANNEL_M : CHANNEL_L + CHANNEL_R;
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SOF_handler = false;
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buf_stream_out = NULL;
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buf_stream_in = NULL;
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interruptOUT = false;
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writeIN = false;
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interruptIN = false;
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available = false;
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volume = 0;
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// connect the device
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USBDevice::connect();
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}
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bool USBAudio::read(uint8_t * buf) {
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buf_stream_in = buf;
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SOF_handler = false;
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while (!available || !SOF_handler);
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available = false;
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return true;
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}
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bool USBAudio::readNB(uint8_t * buf) {
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buf_stream_in = buf;
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SOF_handler = false;
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while (!SOF_handler);
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if (available) {
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available = false;
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buf_stream_in = NULL;
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return true;
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}
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return false;
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}
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bool USBAudio::readWrite(uint8_t * buf_read, uint8_t * buf_write) {
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buf_stream_in = buf_read;
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SOF_handler = false;
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writeIN = false;
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if (interruptIN) {
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USBDevice::writeNB(EP3IN, buf_write, PACKET_SIZE_ISO_OUT, PACKET_SIZE_ISO_OUT);
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} else {
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buf_stream_out = buf_write;
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}
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while (!available);
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if (interruptIN) {
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while (!writeIN);
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}
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while (!SOF_handler);
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return true;
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}
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bool USBAudio::write(uint8_t * buf) {
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writeIN = false;
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SOF_handler = false;
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if (interruptIN) {
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USBDevice::writeNB(EP3IN, buf, PACKET_SIZE_ISO_OUT, PACKET_SIZE_ISO_OUT);
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} else {
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buf_stream_out = buf;
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}
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while (!SOF_handler);
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if (interruptIN) {
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while (!writeIN);
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}
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return true;
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}
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float USBAudio::getVolume() {
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return (mute) ? 0.0 : volume;
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}
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bool USBAudio::EPISO_OUT_callback() {
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uint32_t size = 0;
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interruptOUT = true;
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if (buf_stream_in != NULL) {
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readEP(EP3OUT, (uint8_t *)buf_stream_in, &size, PACKET_SIZE_ISO_IN);
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available = true;
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buf_stream_in = NULL;
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}
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readStart(EP3OUT, PACKET_SIZE_ISO_IN);
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return false;
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}
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bool USBAudio::EPISO_IN_callback() {
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interruptIN = true;
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writeIN = true;
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return true;
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}
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// Called in ISR context on each start of frame
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void USBAudio::SOF(int frameNumber) {
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uint32_t size = 0;
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if (!interruptOUT) {
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// read the isochronous endpoint
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if (buf_stream_in != NULL) {
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if (USBDevice::readEP_NB(EP3OUT, (uint8_t *)buf_stream_in, &size, PACKET_SIZE_ISO_IN)) {
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if (size) {
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available = true;
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readStart(EP3OUT, PACKET_SIZE_ISO_IN);
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buf_stream_in = NULL;
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}
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}
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}
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}
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if (!interruptIN) {
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// write if needed
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if (buf_stream_out != NULL) {
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USBDevice::writeNB(EP3IN, (uint8_t *)buf_stream_out, PACKET_SIZE_ISO_OUT, PACKET_SIZE_ISO_OUT);
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buf_stream_out = NULL;
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}
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}
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SOF_handler = true;
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}
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// Called in ISR context
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// Set configuration. Return false if the configuration is not supported.
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bool USBAudio::USBCallback_setConfiguration(uint8_t configuration) {
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if (configuration != DEFAULT_CONFIGURATION) {
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return false;
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}
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// Configure isochronous endpoint
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realiseEndpoint(EP3OUT, PACKET_SIZE_ISO_IN, ISOCHRONOUS);
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realiseEndpoint(EP3IN, PACKET_SIZE_ISO_OUT, ISOCHRONOUS);
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// activate readings on this endpoint
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readStart(EP3OUT, PACKET_SIZE_ISO_IN);
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return true;
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}
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// Called in ISR context
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// Set alternate setting. Return false if the alternate setting is not supported
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bool USBAudio::USBCallback_setInterface(uint16_t interface, uint8_t alternate) {
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if (interface == 0 && alternate == 0) {
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return true;
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}
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if (interface == 1 && (alternate == 0 || alternate == 1)) {
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return true;
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}
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if (interface == 2 && (alternate == 0 || alternate == 1)) {
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return true;
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}
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return false;
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}
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// Called in ISR context
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// Called by USBDevice on Endpoint0 request
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// This is used to handle extensions to standard requests and class specific requests.
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// Return true if class handles this request
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bool USBAudio::USBCallback_request() {
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bool success = false;
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CONTROL_TRANSFER * transfer = getTransferPtr();
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// Process class-specific requests
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if (transfer->setup.bmRequestType.Type == CLASS_TYPE) {
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// Feature Unit: Interface = 0, ID = 2
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if (transfer->setup.wIndex == 0x0200) {
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// Master Channel
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if ((transfer->setup.wValue & 0xff) == 0) {
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switch (transfer->setup.wValue >> 8) {
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case MUTE_CONTROL:
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switch (transfer->setup.bRequest) {
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case REQUEST_GET_CUR:
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transfer->remaining = 1;
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transfer->ptr = &mute;
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transfer->direction = DEVICE_TO_HOST;
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success = true;
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break;
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case REQUEST_SET_CUR:
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transfer->remaining = 1;
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transfer->notify = true;
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transfer->direction = HOST_TO_DEVICE;
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success = true;
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break;
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default:
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break;
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}
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break;
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case VOLUME_CONTROL:
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switch (transfer->setup.bRequest) {
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case REQUEST_GET_CUR:
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transfer->remaining = 2;
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transfer->ptr = (uint8_t *)&volCur;
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transfer->direction = DEVICE_TO_HOST;
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success = true;
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break;
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case REQUEST_GET_MIN:
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transfer->remaining = 2;
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transfer->ptr = (uint8_t *)&volMin;
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transfer->direction = DEVICE_TO_HOST;
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success = true;
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break;
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case REQUEST_GET_MAX:
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transfer->remaining = 2;
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transfer->ptr = (uint8_t *)&volMax;
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transfer->direction = DEVICE_TO_HOST;
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success = true;
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break;
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case REQUEST_GET_RES:
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transfer->remaining = 2;
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transfer->ptr = (uint8_t *)&volRes;
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transfer->direction = DEVICE_TO_HOST;
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success = true;
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break;
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case REQUEST_SET_CUR:
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transfer->remaining = 2;
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transfer->notify = true;
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transfer->direction = HOST_TO_DEVICE;
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success = true;
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break;
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case REQUEST_SET_MIN:
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transfer->remaining = 2;
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transfer->notify = true;
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transfer->direction = HOST_TO_DEVICE;
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success = true;
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break;
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case REQUEST_SET_MAX:
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transfer->remaining = 2;
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transfer->notify = true;
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transfer->direction = HOST_TO_DEVICE;
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success = true;
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break;
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case REQUEST_SET_RES:
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transfer->remaining = 2;
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transfer->notify = true;
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transfer->direction = HOST_TO_DEVICE;
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success = true;
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break;
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}
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break;
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default:
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break;
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}
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}
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}
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}
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return success;
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}
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// Called in ISR context when a data OUT stage has been performed
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void USBAudio::USBCallback_requestCompleted(uint8_t * buf, uint32_t length) {
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if ((length == 1) || (length == 2)) {
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uint16_t data = (length == 1) ? *buf : *((uint16_t *)buf);
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CONTROL_TRANSFER * transfer = getTransferPtr();
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switch (transfer->setup.wValue >> 8) {
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case MUTE_CONTROL:
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switch (transfer->setup.bRequest) {
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case REQUEST_SET_CUR:
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mute = data & 0xff;
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updateVol.call();
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break;
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default:
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break;
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}
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break;
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case VOLUME_CONTROL:
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switch (transfer->setup.bRequest) {
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case REQUEST_SET_CUR:
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volCur = data;
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volume = (float)volCur/(float)volMax;
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updateVol.call();
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break;
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default:
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break;
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}
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break;
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default:
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break;
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}
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}
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}
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#define TOTAL_DESCRIPTOR_LENGTH ((1 * CONFIGURATION_DESCRIPTOR_LENGTH) \
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+ (5 * INTERFACE_DESCRIPTOR_LENGTH) \
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+ (1 * CONTROL_INTERFACE_DESCRIPTOR_LENGTH + 1) \
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+ (2 * INPUT_TERMINAL_DESCRIPTOR_LENGTH) \
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+ (1 * FEATURE_UNIT_DESCRIPTOR_LENGTH) \
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+ (2 * OUTPUT_TERMINAL_DESCRIPTOR_LENGTH) \
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+ (2 * STREAMING_INTERFACE_DESCRIPTOR_LENGTH) \
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+ (2 * FORMAT_TYPE_I_DESCRIPTOR_LENGTH) \
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+ (2 * (ENDPOINT_DESCRIPTOR_LENGTH + 2)) \
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+ (2 * STREAMING_ENDPOINT_DESCRIPTOR_LENGTH) )
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#define TOTAL_CONTROL_INTF_LENGTH (CONTROL_INTERFACE_DESCRIPTOR_LENGTH + 1 + \
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2*INPUT_TERMINAL_DESCRIPTOR_LENGTH + \
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FEATURE_UNIT_DESCRIPTOR_LENGTH + \
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2*OUTPUT_TERMINAL_DESCRIPTOR_LENGTH)
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uint8_t * USBAudio::configurationDesc() {
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static uint8_t configDescriptor[] = {
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// Configuration 1
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CONFIGURATION_DESCRIPTOR_LENGTH, // bLength
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CONFIGURATION_DESCRIPTOR, // bDescriptorType
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LSB(TOTAL_DESCRIPTOR_LENGTH), // wTotalLength (LSB)
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MSB(TOTAL_DESCRIPTOR_LENGTH), // wTotalLength (MSB)
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0x03, // bNumInterfaces
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DEFAULT_CONFIGURATION, // bConfigurationValue
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0x00, // iConfiguration
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0x80, // bmAttributes
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50, // bMaxPower
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// Interface 0, Alternate Setting 0, Audio Control
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INTERFACE_DESCRIPTOR_LENGTH, // bLength
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INTERFACE_DESCRIPTOR, // bDescriptorType
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0x00, // bInterfaceNumber
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0x00, // bAlternateSetting
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0x00, // bNumEndpoints
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AUDIO_CLASS, // bInterfaceClass
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SUBCLASS_AUDIOCONTROL, // bInterfaceSubClass
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0x00, // bInterfaceProtocol
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0x00, // iInterface
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// Audio Control Interface
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CONTROL_INTERFACE_DESCRIPTOR_LENGTH + 1,// bLength
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INTERFACE_DESCRIPTOR_TYPE, // bDescriptorType
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CONTROL_HEADER, // bDescriptorSubtype
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LSB(0x0100), // bcdADC (LSB)
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MSB(0x0100), // bcdADC (MSB)
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LSB(TOTAL_CONTROL_INTF_LENGTH), // wTotalLength
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MSB(TOTAL_CONTROL_INTF_LENGTH), // wTotalLength
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0x02, // bInCollection
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0x01, // baInterfaceNr
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0x02, // baInterfaceNr
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// Audio Input Terminal (Speaker)
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INPUT_TERMINAL_DESCRIPTOR_LENGTH, // bLength
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INTERFACE_DESCRIPTOR_TYPE, // bDescriptorType
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CONTROL_INPUT_TERMINAL, // bDescriptorSubtype
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0x01, // bTerminalID
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LSB(TERMINAL_USB_STREAMING), // wTerminalType
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MSB(TERMINAL_USB_STREAMING), // wTerminalType
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0x00, // bAssocTerminal
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channel_nb_in, // bNrChannels
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(uint8_t)(LSB(channel_config_in)), // wChannelConfig
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(uint8_t)(MSB(channel_config_in)), // wChannelConfig
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0x00, // iChannelNames
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0x00, // iTerminal
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// Audio Feature Unit (Speaker)
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FEATURE_UNIT_DESCRIPTOR_LENGTH, // bLength
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INTERFACE_DESCRIPTOR_TYPE, // bDescriptorType
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CONTROL_FEATURE_UNIT, // bDescriptorSubtype
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0x02, // bUnitID
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0x01, // bSourceID
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0x01, // bControlSize
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CONTROL_MUTE |
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CONTROL_VOLUME, // bmaControls(0)
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0x00, // bmaControls(1)
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0x00, // iTerminal
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// Audio Output Terminal (Speaker)
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OUTPUT_TERMINAL_DESCRIPTOR_LENGTH, // bLength
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INTERFACE_DESCRIPTOR_TYPE, // bDescriptorType
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CONTROL_OUTPUT_TERMINAL, // bDescriptorSubtype
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0x03, // bTerminalID
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LSB(TERMINAL_SPEAKER), // wTerminalType
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MSB(TERMINAL_SPEAKER), // wTerminalType
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0x00, // bAssocTerminal
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0x02, // bSourceID
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0x00, // iTerminal
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// Audio Input Terminal (Microphone)
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INPUT_TERMINAL_DESCRIPTOR_LENGTH, // bLength
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INTERFACE_DESCRIPTOR_TYPE, // bDescriptorType
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CONTROL_INPUT_TERMINAL, // bDescriptorSubtype
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0x04, // bTerminalID
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LSB(TERMINAL_MICROPHONE), // wTerminalType
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MSB(TERMINAL_MICROPHONE), // wTerminalType
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0x00, // bAssocTerminal
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channel_nb_out, // bNrChannels
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(uint8_t)(LSB(channel_config_out)), // wChannelConfig
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(uint8_t)(MSB(channel_config_out)), // wChannelConfig
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0x00, // iChannelNames
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0x00, // iTerminal
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// Audio Output Terminal (Microphone)
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OUTPUT_TERMINAL_DESCRIPTOR_LENGTH, // bLength
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INTERFACE_DESCRIPTOR_TYPE, // bDescriptorType
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CONTROL_OUTPUT_TERMINAL, // bDescriptorSubtype
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0x05, // bTerminalID
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LSB(TERMINAL_USB_STREAMING), // wTerminalType
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MSB(TERMINAL_USB_STREAMING), // wTerminalType
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0x00, // bAssocTerminal
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0x04, // bSourceID
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0x00, // iTerminal
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// Interface 1, Alternate Setting 0, Audio Streaming - Zero Bandwith
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INTERFACE_DESCRIPTOR_LENGTH, // bLength
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INTERFACE_DESCRIPTOR, // bDescriptorType
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0x01, // bInterfaceNumber
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0x00, // bAlternateSetting
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0x00, // bNumEndpoints
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AUDIO_CLASS, // bInterfaceClass
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SUBCLASS_AUDIOSTREAMING, // bInterfaceSubClass
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0x00, // bInterfaceProtocol
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0x00, // iInterface
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// Interface 1, Alternate Setting 1, Audio Streaming - Operational
|
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INTERFACE_DESCRIPTOR_LENGTH, // bLength
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INTERFACE_DESCRIPTOR, // bDescriptorType
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0x01, // bInterfaceNumber
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0x01, // bAlternateSetting
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0x01, // bNumEndpoints
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AUDIO_CLASS, // bInterfaceClass
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SUBCLASS_AUDIOSTREAMING, // bInterfaceSubClass
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0x00, // bInterfaceProtocol
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0x00, // iInterface
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// Audio Streaming Interface
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STREAMING_INTERFACE_DESCRIPTOR_LENGTH, // bLength
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INTERFACE_DESCRIPTOR_TYPE, // bDescriptorType
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STREAMING_GENERAL, // bDescriptorSubtype
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0x01, // bTerminalLink
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0x00, // bDelay
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LSB(FORMAT_PCM), // wFormatTag
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MSB(FORMAT_PCM), // wFormatTag
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// Audio Type I Format
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FORMAT_TYPE_I_DESCRIPTOR_LENGTH, // bLength
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INTERFACE_DESCRIPTOR_TYPE, // bDescriptorType
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STREAMING_FORMAT_TYPE, // bDescriptorSubtype
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FORMAT_TYPE_I, // bFormatType
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channel_nb_in, // bNrChannels
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0x02, // bSubFrameSize
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16, // bBitResolution
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0x01, // bSamFreqType
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(uint8_t)(LSB(FREQ_IN)), // tSamFreq
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(uint8_t)((FREQ_IN >> 8) & 0xff), // tSamFreq
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(uint8_t)((FREQ_IN >> 16) & 0xff), // tSamFreq
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// Endpoint - Standard Descriptor
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ENDPOINT_DESCRIPTOR_LENGTH + 2, // bLength
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ENDPOINT_DESCRIPTOR, // bDescriptorType
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PHY_TO_DESC(EPISO_OUT), // bEndpointAddress
|
|
E_ISOCHRONOUS, // bmAttributes
|
|
(uint8_t)(LSB(PACKET_SIZE_ISO_IN)), // wMaxPacketSize
|
|
(uint8_t)(MSB(PACKET_SIZE_ISO_IN)), // wMaxPacketSize
|
|
0x01, // bInterval
|
|
0x00, // bRefresh
|
|
0x00, // bSynchAddress
|
|
|
|
// Endpoint - Audio Streaming
|
|
STREAMING_ENDPOINT_DESCRIPTOR_LENGTH, // bLength
|
|
ENDPOINT_DESCRIPTOR_TYPE, // bDescriptorType
|
|
ENDPOINT_GENERAL, // bDescriptor
|
|
0x00, // bmAttributes
|
|
0x00, // bLockDelayUnits
|
|
LSB(0x0000), // wLockDelay
|
|
MSB(0x0000), // wLockDelay
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// Interface 1, Alternate Setting 0, Audio Streaming - Zero Bandwith
|
|
INTERFACE_DESCRIPTOR_LENGTH, // bLength
|
|
INTERFACE_DESCRIPTOR, // bDescriptorType
|
|
0x02, // bInterfaceNumber
|
|
0x00, // bAlternateSetting
|
|
0x00, // bNumEndpoints
|
|
AUDIO_CLASS, // bInterfaceClass
|
|
SUBCLASS_AUDIOSTREAMING, // bInterfaceSubClass
|
|
0x00, // bInterfaceProtocol
|
|
0x00, // iInterface
|
|
|
|
// Interface 1, Alternate Setting 1, Audio Streaming - Operational
|
|
INTERFACE_DESCRIPTOR_LENGTH, // bLength
|
|
INTERFACE_DESCRIPTOR, // bDescriptorType
|
|
0x02, // bInterfaceNumber
|
|
0x01, // bAlternateSetting
|
|
0x01, // bNumEndpoints
|
|
AUDIO_CLASS, // bInterfaceClass
|
|
SUBCLASS_AUDIOSTREAMING, // bInterfaceSubClass
|
|
0x00, // bInterfaceProtocol
|
|
0x00, // iInterface
|
|
|
|
// Audio Streaming Interface
|
|
STREAMING_INTERFACE_DESCRIPTOR_LENGTH, // bLength
|
|
INTERFACE_DESCRIPTOR_TYPE, // bDescriptorType
|
|
SUBCLASS_AUDIOCONTROL, // bDescriptorSubtype
|
|
0x05, // bTerminalLink (output terminal microphone)
|
|
0x01, // bDelay
|
|
0x01, // wFormatTag
|
|
0x00, // wFormatTag
|
|
|
|
// Audio Type I Format
|
|
FORMAT_TYPE_I_DESCRIPTOR_LENGTH, // bLength
|
|
INTERFACE_DESCRIPTOR_TYPE, // bDescriptorType
|
|
SUBCLASS_AUDIOSTREAMING, // bDescriptorSubtype
|
|
FORMAT_TYPE_I, // bFormatType
|
|
channel_nb_out, // bNrChannels
|
|
0x02, // bSubFrameSize
|
|
0x10, // bBitResolution
|
|
0x01, // bSamFreqType
|
|
(uint8_t)(LSB(FREQ_OUT)), // tSamFreq
|
|
(uint8_t)((FREQ_OUT >> 8) & 0xff), // tSamFreq
|
|
(uint8_t)((FREQ_OUT >> 16) & 0xff), // tSamFreq
|
|
|
|
// Endpoint - Standard Descriptor
|
|
ENDPOINT_DESCRIPTOR_LENGTH + 2, // bLength
|
|
ENDPOINT_DESCRIPTOR, // bDescriptorType
|
|
PHY_TO_DESC(EPISO_IN), // bEndpointAddress
|
|
E_ISOCHRONOUS, // bmAttributes
|
|
(uint8_t)(LSB(PACKET_SIZE_ISO_OUT)), // wMaxPacketSize
|
|
(uint8_t)(MSB(PACKET_SIZE_ISO_OUT)), // wMaxPacketSize
|
|
0x01, // bInterval
|
|
0x00, // bRefresh
|
|
0x00, // bSynchAddress
|
|
|
|
// Endpoint - Audio Streaming
|
|
STREAMING_ENDPOINT_DESCRIPTOR_LENGTH, // bLength
|
|
ENDPOINT_DESCRIPTOR_TYPE, // bDescriptorType
|
|
ENDPOINT_GENERAL, // bDescriptor
|
|
0x00, // bmAttributes
|
|
0x00, // bLockDelayUnits
|
|
LSB(0x0000), // wLockDelay
|
|
MSB(0x0000), // wLockDelay
|
|
|
|
// Terminator
|
|
0 // bLength
|
|
};
|
|
return configDescriptor;
|
|
}
|
|
|
|
uint8_t * USBAudio::stringIinterfaceDesc() {
|
|
static uint8_t stringIinterfaceDescriptor[] = {
|
|
0x0c, //bLength
|
|
STRING_DESCRIPTOR, //bDescriptorType 0x03
|
|
'A',0,'u',0,'d',0,'i',0,'o',0 //bString iInterface - Audio
|
|
};
|
|
return stringIinterfaceDescriptor;
|
|
}
|
|
|
|
uint8_t * USBAudio::stringIproductDesc() {
|
|
static uint8_t stringIproductDescriptor[] = {
|
|
0x16, //bLength
|
|
STRING_DESCRIPTOR, //bDescriptorType 0x03
|
|
'M',0,'b',0,'e',0,'d',0,' ',0,'A',0,'u',0,'d',0,'i',0,'o',0 //bString iProduct - Mbed Audio
|
|
};
|
|
return stringIproductDescriptor;
|
|
}
|