/** * @brief Internal SETUP standard IN request handler. * * @param[in] p_inst Generic class instance. * @param[in] p_setup_ev Setup event. * * @return Standard error code. * @retval NRF_SUCCESS Request handled correctly. * @retval NRF_ERROR_NOT_SUPPORTED Request is not supported. */ static ret_code_t setup_req_std_in(app_usbd_class_inst_t const * p_inst, app_usbd_setup_evt_t const * p_setup_ev) { /* Only Get Descriptor standard IN request is supported by Audio class */ if ((app_usbd_setup_req_rec(p_setup_ev->setup.bmRequestType) == APP_USBD_SETUP_REQREC_INTERFACE) && (p_setup_ev->setup.bRequest == APP_USBD_SETUP_STDREQ_GET_DESCRIPTOR)) { size_t dsc_len = 0; size_t max_size; uint8_t * p_trans_buff = app_usbd_core_setup_transfer_buff_get(&max_size); /* Try to find descriptor in class internals*/ ret_code_t ret = app_usbd_class_descriptor_find( p_inst, p_setup_ev->setup.wValue.hb, p_setup_ev->setup.wValue.lb, p_trans_buff, &dsc_len); if (ret != NRF_ERROR_NOT_FOUND) { ASSERT(dsc_len < NRF_DRV_USBD_EPSIZE); return app_usbd_core_setup_rsp(&(p_setup_ev->setup), p_trans_buff, dsc_len); } } return NRF_ERROR_NOT_SUPPORTED; }
/** * @brief Internal SETUP standard IN request handler. * * @param[in] p_inst Generic class instance. * @param[in] p_setup_ev Setup event. * * @return Standard error code. */ static ret_code_t setup_req_std_in(app_usbd_class_inst_t const * p_inst, app_usbd_setup_evt_t const * p_setup_ev) { switch (p_setup_ev->setup.bmRequest) { case APP_USBD_SETUP_STDREQ_GET_DESCRIPTOR: { size_t dsc_len = 0; /* Try to find descriptor in class internals*/ void const * p_dsc = app_usbd_class_descriptor_find(p_inst, p_setup_ev->setup.wValue.hb, p_setup_ev->setup.wValue.lb, &dsc_len); if (p_dsc != NULL) { return app_usbd_core_setup_rsp(&(p_setup_ev->setup), p_dsc, dsc_len); } break; } case APP_USBD_SETUP_STDREQ_GET_INTERFACE: { size_t tx_maxsize; uint8_t * p_tx_buff = app_usbd_core_setup_transfer_buff_get(&tx_maxsize); p_tx_buff[0] = 0; return app_usbd_core_setup_rsp(&p_setup_ev->setup, p_tx_buff, sizeof(uint8_t)); } default: break; } return NRF_ERROR_NOT_SUPPORTED; }