bool udd_ep_set_halt(udd_ep_id_t ep) { udd_ep_job_t *ptr_job; uint8_t index = ep & USB_EP_ADDR_MASK; if (USB_DEVICE_MAX_EP < index) { return false; } ptr_job = &udd_ep_job[index - 1]; if (Is_udd_endpoint_stall_requested(index) // Endpoint stalled || ptr_job->stall_requested) { // Endpoint stall is requested return true; // Already STALL } if (ptr_job->busy == true) { return false; // Job on going, stall impossible } if ((ep & USB_EP_DIR_IN) && (0 != udd_nb_busy_bank(index))) { // Delay the stall after the end of IN transfer on USB line ptr_job->stall_requested = true; udd_enable_bank_interrupt(index); udd_enable_endpoint_interrupt(index); return true; } // Stall endpoint immediately udd_disable_endpoint_bank_autoswitch(index); udd_ack_stall(index); udd_enable_stall_handshake(index); return true; }
static bool udd_ep_interrupt(void) { udd_ep_id_t ep; udd_ep_job_t *ptr_job; // For each endpoint different of control endpoint (0) for (ep = 1; ep <= USB_DEVICE_MAX_EP; ep++) { // Check DMA event if (Is_udd_endpoint_dma_interrupt_enabled(ep) && Is_udd_endpoint_dma_interrupt(ep)) { uint32_t nb_remaining; udd_disable_endpoint_dma_interrupt(ep); // Save number of data no transfered nb_remaining = (udd_endpoint_dma_get_status(ep) & AVR32_USBB_UDDMA1_STATUS_CH_BYTE_CNT_MASK) >> AVR32_USBB_UDDMA1_STATUS_CH_BYTE_CNT_OFFSET; // Get job corresponding at endpoint ptr_job = &udd_ep_job[ep - 1]; // Update number of data transfered ptr_job->buf_size -= nb_remaining; if (!Is_udd_endpoint_in(ep)) { // Disable autoswitch bank on OUT udd_disable_endpoint_bank_autoswitch(ep); } else { // Wait end of background transfer on IN endpoint before disabled autoswitch bank udd_enable_endpoint_interrupt(ep); udd_enable_bank_interrupt(ep); } // Call callback to signal end of transfer udd_ep_finish_job(&udd_ep_job[ep - 1], false); return true; } // Check empty bank interrupt event if (Is_udd_endpoint_interrupt_enabled(ep) && (0 == udd_nb_busy_bank(ep))) { // End of background transfer on IN endpoint udd_disable_bank_interrupt(ep); udd_disable_endpoint_interrupt(ep); // If no new transfer running then disable autoswitch bank if (!udd_ep_job[ep - 1].busy) { udd_disable_endpoint_bank_autoswitch(ep); } // If a stall has been requested during backgound transfer then execute it if (udd_ep_job[ep - 1].stall_requested) { udd_ep_job[ep - 1].stall_requested = false; udd_enable_stall_handshake(ep); udd_reset_data_toggle(ep); } return true; } }