static uint8_t audio_get_control_interface_number(app_usbd_class_inst_t const * p_inst)
{
app_usbd_class_iface_conf_t const * ifce = 0;
ifce = app_usbd_class_iface_get(p_inst, 0);
return app_usbd_class_iface_number_get(ifce);
}
/**
* @brief Auxiliary function to access CDC ACM DATA OUT endpoint address.
*
* @param[in] p_inst Class instance data.
*
* @return OUT endpoint address.
*/
static inline nrf_drv_usbd_ep_t data_ep_out_addr_get(app_usbd_class_inst_t const * p_inst)
{
app_usbd_class_iface_conf_t const * class_iface;
class_iface = app_usbd_class_iface_get(p_inst, APP_USBD_CDC_ACM_DATA_IFACE_IDX);
app_usbd_class_ep_conf_t const * ep_cfg;
ep_cfg = app_usbd_class_iface_ep_get(class_iface, APP_USBD_CDC_ACM_DATA_EPOUT_IDX);
return app_usbd_class_ep_address_get(ep_cfg);
}
/**
* @brief Auxiliary function to access CDC ACM COMM IN endpoint address.
*
* @param[in] p_inst Class instance data.
*
* @return IN endpoint address.
*/
static inline nrf_drv_usbd_ep_t comm_ep_in_addr_get(app_usbd_class_inst_t const * p_inst)
{
app_usbd_class_iface_conf_t const * class_iface;
class_iface = app_usbd_class_iface_get(p_inst, APP_USBD_CDC_ACM_COMM_IFACE_IDX);
app_usbd_class_ep_conf_t const * ep_cfg;
ep_cfg = app_usbd_class_iface_ep_get(class_iface, APP_USBD_CDC_ACM_COMM_EPIN_IDX);
return app_usbd_class_ep_address_get(ep_cfg);
}
/**
* @brief Auxiliary function to access isochronous endpoint address.
*
* @param[in] p_inst Class instance data.
*
* @return ISO endpoint address.
*/
static inline nrf_drv_usbd_ep_t ep_iso_addr_get(app_usbd_class_inst_t const * p_inst)
{
app_usbd_class_iface_conf_t const * class_iface;
class_iface = app_usbd_class_iface_get(p_inst, APP_USBD_AUDIO_STREAMING_IFACE_IDX);
app_usbd_class_ep_conf_t const * ep_cfg;
ep_cfg = app_usbd_class_iface_ep_get(class_iface, APP_USBD_CDC_AUDIO_STREAMING_EP_IDX);
return app_usbd_class_ep_address_get(ep_cfg);
}
static void iface_deselect(
app_usbd_class_inst_t const * const p_inst,
uint8_t iface_idx)
{
app_usbd_class_iface_conf_t const * p_iface = app_usbd_class_iface_get(p_inst, iface_idx);
/* Simple check if this is data interface */
if (p_iface->ep_cnt > 0)
{
app_usbd_audio_t const * p_audio = audio_get(p_inst);
app_usbd_audio_ctx_t * p_audio_ctx = audio_ctx_get(p_audio);
p_audio_ctx->streaming = false;
}
/* Note that all the interface endpoints would be disabled automatically after this function */
}
static uint8_t iface_selection_get(
app_usbd_class_inst_t const * const p_inst,
uint8_t iface_idx)
{
app_usbd_class_iface_conf_t const * p_iface = app_usbd_class_iface_get(p_inst, iface_idx);
/* Simple check if this is data interface */
uint8_t const ep_count = app_usbd_class_iface_ep_count_get(p_iface);
if (ep_count > 0)
{
app_usbd_audio_t const * p_audio = audio_get(p_inst);
app_usbd_audio_ctx_t * p_audio_ctx = audio_ctx_get(p_audio);
return (p_audio_ctx->streaming) ? 1 : 0;
}
return 0;
}
/**
* @brief Select interface.
*
* @param[in,out] p_inst Instance of the class.
* @param[in] iface_idx Index of the interface inside class structure.
* @param[in] alternate Alternate setting that should be selected.
*/
static ret_code_t iface_select(
app_usbd_class_inst_t const * const p_inst,
uint8_t iface_idx,
uint8_t alternate)
{
app_usbd_class_iface_conf_t const * p_iface = app_usbd_class_iface_get(p_inst, iface_idx);
/* Simple check if this is data interface */
uint8_t const ep_count = app_usbd_class_iface_ep_count_get(p_iface);
if (ep_count > 0)
{
if (alternate > 1)
{
return NRF_ERROR_INVALID_PARAM;
}
app_usbd_audio_t const * p_audio = audio_get(p_inst);
app_usbd_audio_ctx_t * p_audio_ctx = audio_ctx_get(p_audio);
p_audio_ctx->streaming = (alternate != 0);
uint8_t i;
for (i = 0; i < ep_count; ++i)
{
nrf_drv_usbd_ep_t ep_addr =
app_usbd_class_ep_address_get(app_usbd_class_iface_ep_get(p_iface, i));
if (alternate)
{
app_usbd_ep_enable(ep_addr);
}
else
{
app_usbd_ep_disable(ep_addr);
}
}
return NRF_SUCCESS;
}
return NRF_ERROR_NOT_SUPPORTED;
}
/** @brief @ref app_usbd_class_methods_t::feed_descriptors */
static bool dummy_class_feed_descriptors(app_usbd_class_descriptor_ctx_t * p_ctx,
app_usbd_class_inst_t const * p_inst,
uint8_t * p_buff,
size_t max_size)
{
static app_usbd_class_iface_conf_t const * p_cur_iface = 0;
p_cur_iface = app_usbd_class_iface_get(p_inst, 0);
APP_USBD_CLASS_DESCRIPTOR_BEGIN(p_ctx, p_buff, max_size)
/* INTERFACE DESCRIPTOR */
APP_USBD_CLASS_DESCRIPTOR_WRITE(sizeof(app_usbd_descriptor_iface_t)); // bLength
APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_DESCRIPTOR_INTERFACE); // bDescriptorType
APP_USBD_CLASS_DESCRIPTOR_WRITE(app_usbd_class_iface_number_get(p_cur_iface)); // bInterfaceNumber
APP_USBD_CLASS_DESCRIPTOR_WRITE(0x00); // bAlternateSetting
APP_USBD_CLASS_DESCRIPTOR_WRITE(0); // bNumEndpoints
APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_DUMMY_CLASS); // bInterfaceClass
APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_DUMMY_SUBCLASS); // bInterfaceSubClass
APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_DUMMY_PROTOCOL); // bInterfaceProtocol
APP_USBD_CLASS_DESCRIPTOR_WRITE(0x00); // iInterface
APP_USBD_CLASS_DESCRIPTOR_END();
}
/**
* @brief @ref app_usbd_class_methods_t::feed_descriptors
*/
static bool nrf_dfu_trigger_feed_descriptors(app_usbd_class_descriptor_ctx_t * p_ctx,
app_usbd_class_inst_t const * p_inst,
uint8_t * p_buff,
size_t max_size)
{
static app_usbd_class_iface_conf_t const * p_cur_iface = NULL;
p_cur_iface = app_usbd_class_iface_get(p_inst, 0);
app_usbd_nrf_dfu_trigger_t const * p_dfu = nrf_dfu_trigger_get(p_inst);
APP_USBD_CLASS_DESCRIPTOR_BEGIN(p_ctx, p_buff, max_size)
/* INTERFACE DESCRIPTOR */
APP_USBD_CLASS_DESCRIPTOR_WRITE(sizeof(app_usbd_descriptor_iface_t)); // bLength
APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_DESCRIPTOR_INTERFACE); // bDescriptorType
APP_USBD_CLASS_DESCRIPTOR_WRITE(app_usbd_class_iface_number_get(p_cur_iface)); // bInterfaceNumber
APP_USBD_CLASS_DESCRIPTOR_WRITE(0x00); // bAlternateSetting
APP_USBD_CLASS_DESCRIPTOR_WRITE(0); // bNumEndpoints
APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_NRF_DFU_TRIGGER_CLASS); // bInterfaceClass
APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_NRF_DFU_TRIGGER_SUBCLASS); // bInterfaceSubClass
APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_NRF_DFU_TRIGGER_PROTOCOL_RUNTIME); // bInterfaceProtocol
APP_USBD_CLASS_DESCRIPTOR_WRITE(0x00); // iInterface
/* FUNCTIONAL DESCRIPTOR */
APP_USBD_CLASS_DESCRIPTOR_WRITE(sizeof(app_usbd_nrf_dfu_trigger_desc_func_t)); // bFunctionLength
APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_NRF_DFU_TRIGGER_CS_FUNCTIONAL); // bDescriptorType
APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_NRF_DFU_TRIGGER_BIT_CAN_DNLOAD |
APP_USBD_NRF_DFU_TRIGGER_BIT_WILL_DETACH); // bmAttribute
APP_USBD_CLASS_DESCRIPTOR_WRITE(LSB_16(p_dfu->specific.inst.detach_timeout)); // wDetachTimeOut LSB
APP_USBD_CLASS_DESCRIPTOR_WRITE(MSB_16(p_dfu->specific.inst.detach_timeout)); // wDetachTimeOut MSB
APP_USBD_CLASS_DESCRIPTOR_WRITE(LSB_16(p_dfu->specific.inst.transfer_size)); // wTransferSize LSB
APP_USBD_CLASS_DESCRIPTOR_WRITE(MSB_16(p_dfu->specific.inst.transfer_size)); // wTransferSize MSB
APP_USBD_CLASS_DESCRIPTOR_WRITE(LSB_16(p_dfu->specific.inst.bcd_dfu)); // bcdDFUVersion LSB
APP_USBD_CLASS_DESCRIPTOR_WRITE(MSB_16(p_dfu->specific.inst.bcd_dfu)); // bcdDFUVersion MSB
APP_USBD_CLASS_DESCRIPTOR_END();
}
static bool audio_feed_descriptors(app_usbd_class_descriptor_ctx_t * p_ctx,
app_usbd_class_inst_t const * p_inst,
uint8_t * p_buff,
size_t max_size)
{
static uint8_t ifaces = 0;
ifaces = app_usbd_class_iface_count_get(p_inst);
ASSERT(ifaces == 2);
app_usbd_audio_t const * p_audio = audio_get(p_inst);
APP_USBD_CLASS_DESCRIPTOR_BEGIN(p_ctx, p_buff, max_size);
/* CONTROL INTERFACE DESCRIPTOR */
APP_USBD_CLASS_DESCRIPTOR_WRITE(0x09); // bLength
APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_DESCRIPTOR_INTERFACE); // bDescriptorType = Interface
static app_usbd_class_iface_conf_t const * p_cur_iface = NULL;
p_cur_iface = app_usbd_class_iface_get(p_inst, 0);
APP_USBD_CLASS_DESCRIPTOR_WRITE(app_usbd_class_iface_number_get(p_cur_iface)); // bInterfaceNumber
APP_USBD_CLASS_DESCRIPTOR_WRITE(0x00); // bAlternateSetting
APP_USBD_CLASS_DESCRIPTOR_WRITE(app_usbd_class_iface_ep_count_get(p_cur_iface)); // bNumEndpoints
APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_AUDIO_CLASS); // bInterfaceClass = Audio
APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_AUDIO_SUBCLASS_AUDIOCONTROL); // bInterfaceSubclass (Audio Control)
APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_AUDIO_CLASS_PROTOCOL_UNDEFINED); // bInterfaceProtocol
APP_USBD_CLASS_DESCRIPTOR_WRITE(0x00); // iInterface
/* HEADER INTERFACE */
APP_USBD_CLASS_DESCRIPTOR_WRITE(0x09); // bLength
APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_AUDIO_DESCRIPTOR_INTERFACE); // bDescriptorType = Audio Interfaces
APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_AUDIO_AC_IFACE_SUBTYPE_HEADER); // bDescriptorSubtype = Header
APP_USBD_CLASS_DESCRIPTOR_WRITE(LSB_16(0x0100)); // bcdADC LSB
APP_USBD_CLASS_DESCRIPTOR_WRITE(MSB_16(0x0100)); // bcdADC MSB
static uint16_t header_desc_len = 0;
header_desc_len = 9 + audio_get_feature_descriptor_size(p_inst) +
audio_get_input_descriptor_size(p_inst) + audio_get_output_descriptor_size(
p_inst);
APP_USBD_CLASS_DESCRIPTOR_WRITE(LSB_16(header_desc_len)); // wTotalLength LSB
APP_USBD_CLASS_DESCRIPTOR_WRITE(MSB_16(header_desc_len)); // wTotalLength MSB
APP_USBD_CLASS_DESCRIPTOR_WRITE(0x01); // bInCollection
APP_USBD_CLASS_DESCRIPTOR_WRITE(audio_get_control_interface_number(p_inst) + 1); // baInterfaceNr(1)
/* INPUT TERMINAL DESCRIPTOR */
static uint32_t cur_byte = 0;
static size_t input_desc_size = 0;
input_desc_size = audio_get_input_descriptor_size(p_inst);
for (cur_byte = 0; cur_byte < input_desc_size; cur_byte++)
{
APP_USBD_CLASS_DESCRIPTOR_WRITE(audio_get_input_descriptor_data(p_inst, cur_byte));
}
/* FEATURE UNIT DESCRIPTOR */
static size_t feature_desc_size = 0;
feature_desc_size = audio_get_feature_descriptor_size(p_inst);
for (cur_byte = 0; cur_byte < feature_desc_size; cur_byte++)
{
APP_USBD_CLASS_DESCRIPTOR_WRITE(audio_get_feature_descriptor_data(p_inst, cur_byte));
}
/* OUTPUT TERMINAL DESCRIPTOR */
static size_t output_desc_size = 0;
output_desc_size = audio_get_output_descriptor_size(p_inst);
for (cur_byte = 0; cur_byte < output_desc_size; cur_byte++)
{
APP_USBD_CLASS_DESCRIPTOR_WRITE(audio_get_output_descriptor_data(p_inst, cur_byte));
}
p_cur_iface++;
/* STREAM INTERFACE DESCRIPTOR ALT 0 */
APP_USBD_CLASS_DESCRIPTOR_WRITE(0x09); // bLength
APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_DESCRIPTOR_INTERFACE); // bDescriptorType = Interface
APP_USBD_CLASS_DESCRIPTOR_WRITE(audio_get_control_interface_number(p_inst) + 1); // bInterfaceNumber
APP_USBD_CLASS_DESCRIPTOR_WRITE(0x00); // bAlternateSetting
APP_USBD_CLASS_DESCRIPTOR_WRITE(0x00); // bNumEndpoints
APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_AUDIO_CLASS); // bInterfaceClass = Audio
APP_USBD_CLASS_DESCRIPTOR_WRITE(p_audio->specific.inst.type_streaming); // bInterfaceSubclass (Audio Control)
APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_AUDIO_CLASS_PROTOCOL_UNDEFINED); // bInterfaceProtocol
APP_USBD_CLASS_DESCRIPTOR_WRITE(0x00); // iInterface
/* STREAM INTERFACE DESCRIPTOR ALT 1 */
APP_USBD_CLASS_DESCRIPTOR_WRITE(0x09); // bLength
APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_DESCRIPTOR_INTERFACE); // bDescriptorType = Interface
APP_USBD_CLASS_DESCRIPTOR_WRITE(audio_get_control_interface_number(p_inst) + 1); // bInterfaceNumber
APP_USBD_CLASS_DESCRIPTOR_WRITE(0x01); // bAlternateSetting
APP_USBD_CLASS_DESCRIPTOR_WRITE(app_usbd_class_iface_ep_count_get(p_cur_iface)); // bNumEndpoints
APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_AUDIO_CLASS); // bInterfaceClass = Audio
APP_USBD_CLASS_DESCRIPTOR_WRITE(p_audio->specific.inst.type_streaming); // bInterfaceSubclass (Audio Control)
APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_AUDIO_CLASS_PROTOCOL_UNDEFINED); // bInterfaceProtocol
APP_USBD_CLASS_DESCRIPTOR_WRITE(0x00); // iInterface
/* AudioStreaming GENERAL DESCRIPTOR */
APP_USBD_CLASS_DESCRIPTOR_WRITE(0x07); // bLength
APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_AUDIO_DESCRIPTOR_INTERFACE); // bDescriptorType = Audio Interface
APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_AUDIO_AS_IFACE_SUBTYPE_GENERAL); // bDescriptorSubtype = General
APP_USBD_CLASS_DESCRIPTOR_WRITE(audio_get_control_interface_number(p_inst) + 1); // bTerminalLink
APP_USBD_CLASS_DESCRIPTOR_WRITE(p_audio->specific.inst.delay); // bDelay
APP_USBD_CLASS_DESCRIPTOR_WRITE(LSB_16(p_audio->specific.inst.format)); // wFormatTag LSB
APP_USBD_CLASS_DESCRIPTOR_WRITE(MSB_16(p_audio->specific.inst.format)); // wFormatTag MSB
/* FORMAT DESCRIPTOR */
static size_t format_desc_size = 0;
format_desc_size = audio_get_format_descriptor_size(p_inst);
for (cur_byte = 0; cur_byte < format_desc_size; cur_byte++)
{
APP_USBD_CLASS_DESCRIPTOR_WRITE(audio_get_format_descriptor_data(p_inst, cur_byte));
}
/* ENDPOINT GENERAL DESCRIPTOR */
APP_USBD_CLASS_DESCRIPTOR_WRITE(0x07); // bLength
APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_AUDIO_DESCRIPTOR_ENDPOINT); // bDescriptorType = Audio Descriptor
APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_AUDIO_EP_SUBTYPE_GENERAL); // bDescriptorSubtype = EP General
APP_USBD_CLASS_DESCRIPTOR_WRITE(0x00); // bmAttributes
APP_USBD_CLASS_DESCRIPTOR_WRITE(0x00); // bLockDelayUnits
APP_USBD_CLASS_DESCRIPTOR_WRITE(LSB_16(0x0000)); // wLockDelay LSB
APP_USBD_CLASS_DESCRIPTOR_WRITE(MSB_16(0x0000)); // wLockDelay MSB
/* ENDPOINT ISO DESCRIPTOR */
APP_USBD_CLASS_DESCRIPTOR_WRITE(0x09); // bLength
APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_DESCRIPTOR_ENDPOINT); // bDescriptorType = Endpoint
static app_usbd_class_ep_conf_t const * p_cur_ep = NULL;
p_cur_ep = app_usbd_class_iface_ep_get(p_cur_iface, 0);
APP_USBD_CLASS_DESCRIPTOR_WRITE(app_usbd_class_ep_address_get(p_cur_ep)); // bEndpointAddress
APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_DESCRIPTOR_EP_ATTR_TYPE_ISOCHRONOUS); // bmAttributes
APP_USBD_CLASS_DESCRIPTOR_WRITE(LSB_16(p_audio->specific.inst.ep_size)); // wMaxPacketSize LSB
APP_USBD_CLASS_DESCRIPTOR_WRITE(MSB_16(p_audio->specific.inst.ep_size)); // wMaxPacketSize MSB
APP_USBD_CLASS_DESCRIPTOR_WRITE(0x01); // bInterval
APP_USBD_CLASS_DESCRIPTOR_WRITE(0x00); // bRefresh
APP_USBD_CLASS_DESCRIPTOR_WRITE(0x00); // bSynchAddress
APP_USBD_CLASS_DESCRIPTOR_END();
}
