436 lines
14 KiB
C
436 lines
14 KiB
C
/*
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* Copyright (c) 2016-2017, Alex Taradov <alex@taradov.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*- Includes ----------------------------------------------------------------*/
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#include <string.h>
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#include <stdbool.h>
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#include <stdalign.h>
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#include "samd21.h"
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#include "hal_gpio.h"
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#include "utils.h"
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#include "nvm_data.h"
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#include "usb.h"
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#include "usb_std.h"
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#include "usb_descriptors.h"
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/*- Definitions -------------------------------------------------------------*/
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HAL_GPIO_PIN(USB_DM, A, 24);
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HAL_GPIO_PIN(USB_DP, A, 25);
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enum
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{
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USB_DEVICE_EPCFG_EPTYPE_DISABLED = 0,
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USB_DEVICE_EPCFG_EPTYPE_CONTROL = 1,
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USB_DEVICE_EPCFG_EPTYPE_ISOCHRONOUS = 2,
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USB_DEVICE_EPCFG_EPTYPE_BULK = 3,
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USB_DEVICE_EPCFG_EPTYPE_INTERRUPT = 4,
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USB_DEVICE_EPCFG_EPTYPE_DUAL_BANK = 5,
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};
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enum
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{
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USB_DEVICE_PCKSIZE_SIZE_8 = 0,
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USB_DEVICE_PCKSIZE_SIZE_16 = 1,
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USB_DEVICE_PCKSIZE_SIZE_32 = 2,
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USB_DEVICE_PCKSIZE_SIZE_64 = 3,
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USB_DEVICE_PCKSIZE_SIZE_128 = 4,
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USB_DEVICE_PCKSIZE_SIZE_256 = 5,
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USB_DEVICE_PCKSIZE_SIZE_512 = 6,
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USB_DEVICE_PCKSIZE_SIZE_1023 = 7,
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};
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/*- Types -------------------------------------------------------------------*/
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typedef union
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{
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UsbDeviceDescBank bank[2];
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struct
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{
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UsbDeviceDescBank out;
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UsbDeviceDescBank in;
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};
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} udc_mem_t;
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/*- Variables ---------------------------------------------------------------*/
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static alignas(4) udc_mem_t udc_mem[USB_EPT_NUM];
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static alignas(4) uint8_t usb_ctrl_in_buf[64];
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static alignas(4) uint8_t usb_ctrl_out_buf[64];
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static void (*usb_control_recv_callback)(uint8_t *data, int size);
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/*- Implementations ---------------------------------------------------------*/
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//-----------------------------------------------------------------------------
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void usb_hw_init(void)
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{
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HAL_GPIO_USB_DM_pmuxen(PORT_PMUX_PMUXE_G_Val);
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HAL_GPIO_USB_DP_pmuxen(PORT_PMUX_PMUXE_G_Val);
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PM->APBBMASK.reg |= PM_APBBMASK_USB;
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GCLK->CLKCTRL.reg = GCLK_CLKCTRL_CLKEN | GCLK_CLKCTRL_ID(USB_GCLK_ID) |
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GCLK_CLKCTRL_GEN(0);
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USB->DEVICE.CTRLA.bit.SWRST = 1;
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while (USB->DEVICE.SYNCBUSY.bit.SWRST);
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USB->DEVICE.PADCAL.bit.TRANSN = NVM_READ_CAL(NVM_USB_TRANSN);
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USB->DEVICE.PADCAL.bit.TRANSP = NVM_READ_CAL(NVM_USB_TRANSP);
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USB->DEVICE.PADCAL.bit.TRIM = NVM_READ_CAL(NVM_USB_TRIM);
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for (int i = 0; i < (int)sizeof(udc_mem); i++)
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((uint8_t *)udc_mem)[i] = 0;
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USB->DEVICE.DESCADD.reg = (uint32_t)udc_mem;
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USB->DEVICE.CTRLA.bit.MODE = USB_CTRLA_MODE_DEVICE_Val;
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USB->DEVICE.CTRLA.bit.RUNSTDBY = 1;
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USB->DEVICE.CTRLB.bit.SPDCONF = USB_DEVICE_CTRLB_SPDCONF_FS_Val;
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USB->DEVICE.CTRLB.bit.DETACH = 0;
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USB->DEVICE.INTENSET.reg = USB_DEVICE_INTENSET_EORST;
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USB->DEVICE.DeviceEndpoint[0].EPINTENSET.bit.RXSTP = 1;
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USB->DEVICE.CTRLA.reg |= USB_CTRLA_ENABLE;
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for (int i = 0; i < USB_EPT_NUM; i++)
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{
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usb_reset_endpoint(i, USB_IN_ENDPOINT);
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usb_reset_endpoint(i, USB_OUT_ENDPOINT);
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}
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//NVIC_EnableIRQ(USB_IRQn);
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}
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//-----------------------------------------------------------------------------
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void usb_attach(void)
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{
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USB->DEVICE.CTRLB.bit.DETACH = 0;
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}
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//-----------------------------------------------------------------------------
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void usb_detach(void)
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{
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USB->DEVICE.CTRLB.bit.DETACH = 1;
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}
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//-----------------------------------------------------------------------------
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void usb_reset_endpoint(int ep, int dir)
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{
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if (USB_IN_ENDPOINT == dir)
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USB->DEVICE.DeviceEndpoint[ep].EPCFG.bit.EPTYPE1 = USB_DEVICE_EPCFG_EPTYPE_DISABLED;
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else
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USB->DEVICE.DeviceEndpoint[ep].EPCFG.bit.EPTYPE0 = USB_DEVICE_EPCFG_EPTYPE_DISABLED;
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}
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//-----------------------------------------------------------------------------
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void usb_configure_endpoint(usb_endpoint_descriptor_t *desc)
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{
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int ep, dir, type, size;
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ep = desc->bEndpointAddress & USB_INDEX_MASK;
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dir = desc->bEndpointAddress & USB_DIRECTION_MASK;
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type = desc->bmAttributes & 0x03;
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size = desc->wMaxPacketSize & 0x3ff;
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usb_reset_endpoint(ep, dir);
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if (size <= 8)
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size = USB_DEVICE_PCKSIZE_SIZE_8;
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else if (size <= 16)
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size = USB_DEVICE_PCKSIZE_SIZE_16;
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else if (size <= 32)
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size = USB_DEVICE_PCKSIZE_SIZE_32;
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else if (size <= 64)
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size = USB_DEVICE_PCKSIZE_SIZE_64;
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else if (size <= 128)
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size = USB_DEVICE_PCKSIZE_SIZE_128;
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else if (size <= 256)
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size = USB_DEVICE_PCKSIZE_SIZE_256;
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else if (size <= 512)
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size = USB_DEVICE_PCKSIZE_SIZE_512;
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else if (size <= 1023)
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size = USB_DEVICE_PCKSIZE_SIZE_1023;
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else
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while (1);
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if (USB_CONTROL_ENDPOINT == type)
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type = USB_DEVICE_EPCFG_EPTYPE_CONTROL;
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else if (USB_ISOCHRONOUS_ENDPOINT == type)
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type = USB_DEVICE_EPCFG_EPTYPE_ISOCHRONOUS;
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else if (USB_BULK_ENDPOINT == type)
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type = USB_DEVICE_EPCFG_EPTYPE_BULK;
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else
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type = USB_DEVICE_EPCFG_EPTYPE_INTERRUPT;
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if (USB_IN_ENDPOINT == dir)
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{
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USB->DEVICE.DeviceEndpoint[ep].EPCFG.bit.EPTYPE1 = type;
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USB->DEVICE.DeviceEndpoint[ep].EPINTENSET.bit.TRCPT1 = 1;
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USB->DEVICE.DeviceEndpoint[ep].EPSTATUSCLR.bit.DTGLIN = 1;
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USB->DEVICE.DeviceEndpoint[ep].EPSTATUSCLR.bit.BK1RDY = 1;
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udc_mem[ep].in.PCKSIZE.bit.SIZE = size;
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}
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else
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{
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USB->DEVICE.DeviceEndpoint[ep].EPCFG.bit.EPTYPE0 = type;
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USB->DEVICE.DeviceEndpoint[ep].EPINTENSET.bit.TRCPT0 = 1;
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USB->DEVICE.DeviceEndpoint[ep].EPSTATUSCLR.bit.DTGLOUT = 1;
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USB->DEVICE.DeviceEndpoint[ep].EPSTATUSSET.bit.BK0RDY = 1;
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udc_mem[ep].out.PCKSIZE.bit.SIZE = size;
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}
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}
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//-----------------------------------------------------------------------------
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bool usb_endpoint_configured(int ep, int dir)
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{
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if (USB_IN_ENDPOINT == dir)
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return (USB_DEVICE_EPCFG_EPTYPE_DISABLED != USB->DEVICE.DeviceEndpoint[ep].EPCFG.bit.EPTYPE1);
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else
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return (USB_DEVICE_EPCFG_EPTYPE_DISABLED != USB->DEVICE.DeviceEndpoint[ep].EPCFG.bit.EPTYPE0);
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}
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//-----------------------------------------------------------------------------
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int usb_endpoint_get_status(int ep, int dir)
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{
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if (USB_IN_ENDPOINT == dir)
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return USB->DEVICE.DeviceEndpoint[ep].EPSTATUS.bit.STALLRQ1;
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else
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return USB->DEVICE.DeviceEndpoint[ep].EPSTATUS.bit.STALLRQ0;
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}
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//-----------------------------------------------------------------------------
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void usb_endpoint_set_feature(int ep, int dir)
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{
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if (USB_IN_ENDPOINT == dir)
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USB->DEVICE.DeviceEndpoint[ep].EPSTATUSSET.bit.STALLRQ1 = 1;
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else
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USB->DEVICE.DeviceEndpoint[ep].EPSTATUSSET.bit.STALLRQ0 = 1;
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}
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//-----------------------------------------------------------------------------
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void usb_endpoint_clear_feature(int ep, int dir)
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{
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if (USB_IN_ENDPOINT == dir)
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{
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if (USB->DEVICE.DeviceEndpoint[ep].EPSTATUS.bit.STALLRQ1)
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{
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USB->DEVICE.DeviceEndpoint[ep].EPSTATUSCLR.bit.STALLRQ1 = 1;
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if (USB->DEVICE.DeviceEndpoint[ep].EPINTFLAG.bit.STALL1)
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{
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USB->DEVICE.DeviceEndpoint[ep].EPINTFLAG.reg = USB_DEVICE_EPINTFLAG_STALL1;
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USB->DEVICE.DeviceEndpoint[ep].EPSTATUSCLR.bit.DTGLIN = 1;
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}
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}
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}
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else
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{
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if (USB->DEVICE.DeviceEndpoint[ep].EPSTATUS.bit.STALLRQ0)
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{
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USB->DEVICE.DeviceEndpoint[ep].EPSTATUSCLR.bit.STALLRQ0 = 1;
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if (USB->DEVICE.DeviceEndpoint[ep].EPINTFLAG.bit.STALL0)
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{
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USB->DEVICE.DeviceEndpoint[ep].EPINTFLAG.reg = USB_DEVICE_EPINTFLAG_STALL0;
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USB->DEVICE.DeviceEndpoint[ep].EPSTATUSCLR.bit.DTGLOUT = 1;
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}
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}
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}
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}
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//-----------------------------------------------------------------------------
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void usb_set_address(int address)
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{
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USB->DEVICE.DADD.reg = USB_DEVICE_DADD_ADDEN | USB_DEVICE_DADD_DADD(address);
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}
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//-----------------------------------------------------------------------------
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void usb_send(int ep, uint8_t *data, int size)
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{
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udc_mem[ep].in.ADDR.reg = (uint32_t)data;
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udc_mem[ep].in.PCKSIZE.bit.BYTE_COUNT = size;
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udc_mem[ep].in.PCKSIZE.bit.MULTI_PACKET_SIZE = 0;
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USB->DEVICE.DeviceEndpoint[ep].EPSTATUSSET.bit.BK1RDY = 1;
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}
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//-----------------------------------------------------------------------------
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void usb_recv(int ep, uint8_t *data, int size)
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{
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udc_mem[ep].out.ADDR.reg = (uint32_t)data;
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udc_mem[ep].out.PCKSIZE.bit.MULTI_PACKET_SIZE = size;
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udc_mem[ep].out.PCKSIZE.bit.BYTE_COUNT = 0;
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USB->DEVICE.DeviceEndpoint[ep].EPSTATUSCLR.bit.BK0RDY = 1;
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}
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//-----------------------------------------------------------------------------
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void usb_control_send_zlp(void)
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{
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udc_mem[0].in.PCKSIZE.bit.BYTE_COUNT = 0;
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USB->DEVICE.DeviceEndpoint[0].EPINTFLAG.reg = USB_DEVICE_EPINTFLAG_TRCPT1;
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USB->DEVICE.DeviceEndpoint[0].EPSTATUSSET.bit.BK1RDY = 1;
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while (0 == USB->DEVICE.DeviceEndpoint[0].EPINTFLAG.bit.TRCPT1);
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}
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//-----------------------------------------------------------------------------
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void usb_control_stall(void)
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{
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USB->DEVICE.DeviceEndpoint[0].EPSTATUSSET.bit.STALLRQ1 = 1;
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}
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//-----------------------------------------------------------------------------
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void usb_control_send(uint8_t *data, int size)
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{
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// USB controller does not have access to the flash memory, so here we do
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// a manual multi-packet transfer. This way data can be located in in
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// the flash memory (big constant descriptors).
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while (size)
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{
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int transfer_size = LIMIT(size, usb_device_descriptor.bMaxPacketSize0);
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for (int i = 0; i < transfer_size; i++)
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usb_ctrl_in_buf[i] = data[i];
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udc_mem[0].in.ADDR.reg = (uint32_t)usb_ctrl_in_buf;
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udc_mem[0].in.PCKSIZE.bit.BYTE_COUNT = transfer_size;
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udc_mem[0].in.PCKSIZE.bit.MULTI_PACKET_SIZE = 0;
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USB->DEVICE.DeviceEndpoint[0].EPINTFLAG.reg = USB_DEVICE_EPINTFLAG_TRCPT1;
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USB->DEVICE.DeviceEndpoint[0].EPSTATUSSET.bit.BK1RDY = 1;
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while (0 == USB->DEVICE.DeviceEndpoint[0].EPINTFLAG.bit.TRCPT1);
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size -= transfer_size;
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data += transfer_size;
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}
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}
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//-----------------------------------------------------------------------------
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void usb_control_recv(void (*callback)(uint8_t *data, int size))
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{
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usb_control_recv_callback = callback;
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}
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//-----------------------------------------------------------------------------
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void usb_task(void)
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{
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int flags, epints;
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if (USB->DEVICE.INTFLAG.bit.EORST)
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{
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USB->DEVICE.INTFLAG.reg = USB_DEVICE_INTFLAG_EORST;
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USB->DEVICE.DADD.reg = USB_DEVICE_DADD_ADDEN;
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for (int i = 0; i < USB_EPT_NUM; i++)
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{
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usb_reset_endpoint(i, USB_IN_ENDPOINT);
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usb_reset_endpoint(i, USB_OUT_ENDPOINT);
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}
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USB->DEVICE.DeviceEndpoint[0].EPCFG.reg =
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USB_DEVICE_EPCFG_EPTYPE0(USB_DEVICE_EPCFG_EPTYPE_CONTROL) |
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USB_DEVICE_EPCFG_EPTYPE1(USB_DEVICE_EPCFG_EPTYPE_CONTROL);
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USB->DEVICE.DeviceEndpoint[0].EPSTATUSSET.bit.BK0RDY = 1;
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USB->DEVICE.DeviceEndpoint[0].EPSTATUSCLR.bit.BK1RDY = 1;
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udc_mem[0].in.PCKSIZE.bit.SIZE = USB_DEVICE_PCKSIZE_SIZE_64;
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udc_mem[0].out.ADDR.reg = (uint32_t)usb_ctrl_out_buf;
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udc_mem[0].out.PCKSIZE.bit.SIZE = USB_DEVICE_PCKSIZE_SIZE_64;
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udc_mem[0].out.PCKSIZE.bit.MULTI_PACKET_SIZE = 64;
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udc_mem[0].out.PCKSIZE.bit.BYTE_COUNT = 0;
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USB->DEVICE.DeviceEndpoint[0].EPINTENSET.bit.RXSTP = 1;
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USB->DEVICE.DeviceEndpoint[0].EPINTENSET.bit.TRCPT0 = 1;
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}
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if (USB->DEVICE.DeviceEndpoint[0].EPINTFLAG.bit.RXSTP)
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{
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usb_request_t *request = (usb_request_t *)usb_ctrl_out_buf;
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if (sizeof(usb_request_t) == udc_mem[0].out.PCKSIZE.bit.BYTE_COUNT)
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{
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if (usb_handle_standard_request(request))
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{
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udc_mem[0].out.PCKSIZE.bit.BYTE_COUNT = 0;
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USB->DEVICE.DeviceEndpoint[0].EPSTATUSCLR.bit.BK0RDY = 1;
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USB->DEVICE.DeviceEndpoint[0].EPINTFLAG.reg = USB_DEVICE_EPINTFLAG_TRCPT0;
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}
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else
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{
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usb_control_stall();
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}
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}
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else
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{
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usb_control_stall();
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}
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USB->DEVICE.DeviceEndpoint[0].EPINTFLAG.reg = USB_DEVICE_EPINTFLAG_RXSTP;
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}
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else if (USB->DEVICE.DeviceEndpoint[0].EPINTFLAG.bit.TRCPT0)
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{
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if (usb_control_recv_callback)
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{
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usb_control_recv_callback(usb_ctrl_out_buf, udc_mem[0].out.PCKSIZE.bit.BYTE_COUNT);
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usb_control_recv_callback = NULL;
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usb_control_send_zlp();
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}
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USB->DEVICE.DeviceEndpoint[0].EPSTATUSSET.bit.BK0RDY = 1;
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USB->DEVICE.DeviceEndpoint[0].EPINTFLAG.reg = USB_DEVICE_EPINTFLAG_TRCPT0;
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}
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epints = USB->DEVICE.EPINTSMRY.reg;
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for (int i = 1; i < USB_EPT_NUM && epints > 0; i++)
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{
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flags = USB->DEVICE.DeviceEndpoint[i].EPINTFLAG.reg;
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epints &= ~(1 << i);
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if (flags & USB_DEVICE_EPINTFLAG_TRCPT0)
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{
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USB->DEVICE.DeviceEndpoint[i].EPSTATUSSET.bit.BK0RDY = 1;
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USB->DEVICE.DeviceEndpoint[i].EPINTFLAG.reg = USB_DEVICE_EPINTFLAG_TRCPT0;
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usb_recv_callback(i, udc_mem[i].out.PCKSIZE.bit.BYTE_COUNT);
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}
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if (flags & USB_DEVICE_EPINTFLAG_TRCPT1)
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{
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USB->DEVICE.DeviceEndpoint[i].EPSTATUSCLR.bit.BK1RDY = 1;
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USB->DEVICE.DeviceEndpoint[i].EPINTFLAG.reg = USB_DEVICE_EPINTFLAG_TRCPT1;
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usb_send_callback(i);
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}
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}
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}
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