[136] | 1 | /* ----------------------------------------------------------------------------
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| 2 | * SAM Software Package License
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| 3 | * ----------------------------------------------------------------------------
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| 4 | * Copyright (c) 2011-2012, Atmel Corporation
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| 5 | *
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| 6 | * All rights reserved.
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| 7 | *
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| 8 | * Redistribution and use in source and binary forms, with or without
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| 9 | * modification, are permitted provided that the following condition is met:
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| 10 | *
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| 11 | * - Redistributions of source code must retain the above copyright notice,
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| 12 | * this list of conditions and the disclaimer below.
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| 13 | *
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| 14 | * Atmel's name may not be used to endorse or promote products derived from
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| 15 | * this software without specific prior written permission.
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| 16 | *
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| 17 | * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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| 19 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
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| 20 | * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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| 22 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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| 23 | * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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| 24 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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| 25 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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| 26 | * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | * ----------------------------------------------------------------------------
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| 28 | */
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| 29 |
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| 30 | #include <stdio.h>
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| 31 | #include <stdint.h>
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| 32 | #include <string.h>
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| 33 |
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| 34 | #include "variant.h"
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| 35 | #include "USB/USB_device.h"
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| 36 | #include "USB/samd21_device.h"
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| 37 | #include "sam.h"
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| 38 |
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| 39 | #ifdef __cplusplus
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| 40 | extern "C"{
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| 41 | #endif // __cplusplus
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| 42 |
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| 43 | #ifdef SAMD_SERIES
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| 44 |
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| 45 | //#define TRACE_DEVICE(x) x
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| 46 | #define TRACE_DEVICE(x)
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| 47 |
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| 48 | __attribute__((__aligned__(4))) __attribute__((__section__(".bss_hram0"))) uint8_t udd_ep_out_cache_buffer[4][64];
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| 49 | __attribute__((__aligned__(4))) __attribute__((__section__(".bss_hram0"))) uint8_t udd_ep_in_cache_buffer[4][128];
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| 50 |
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| 51 | /**
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| 52 | * USB SRAM data containing pipe descriptor table
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| 53 | * The content of the USB SRAM can be :
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| 54 | * - modified by USB hardware interface to update pipe status.
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| 55 | * Thereby, it is read by software.
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| 56 | * - modified by USB software to control pipe.
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| 57 | * Thereby, it is read by hardware.
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| 58 | * This data section is volatile.
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| 59 | */
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| 60 | __attribute__((__aligned__(4))) UsbDeviceDescriptor usb_endpoint_table[USB_EPT_NUM];
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| 61 |
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| 62 | // NVM Software Calibration Area Mapping
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| 63 | // USB TRANSN calibration value. Should be written to the USB PADCAL register.
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| 64 | #define NVM_USB_PAD_TRANSN_POS 45
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| 65 | #define NVM_USB_PAD_TRANSN_SIZE 5
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| 66 | // USB TRANSP calibration value. Should be written to the USB PADCAL register.
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| 67 | #define NVM_USB_PAD_TRANSP_POS 50
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| 68 | #define NVM_USB_PAD_TRANSP_SIZE 5
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| 69 | // USB TRIM calibration value. Should be written to the USB PADCAL register.
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| 70 | #define NVM_USB_PAD_TRIM_POS 55
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| 71 | #define NVM_USB_PAD_TRIM_SIZE 3
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| 72 |
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| 73 | void UDD_Init(void)
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| 74 | {
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| 75 | uint32_t pad_transn;
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| 76 | uint32_t pad_transp;
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| 77 | uint32_t pad_trim;
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| 78 | uint32_t i;
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| 79 |
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| 80 | /* Enable USB clock */
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| 81 | PM->APBBMASK.reg |= PM_APBBMASK_USB;
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| 82 |
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| 83 | /* Set up the USB DP/DN pins */
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| 84 | PORT->Group[0].PINCFG[PIN_PA24G_USB_DM].bit.PMUXEN = 1;
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| 85 | PORT->Group[0].PMUX[PIN_PA24G_USB_DM/2].reg &= ~(0xF << (4 * (PIN_PA24G_USB_DM & 0x01u)));
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| 86 | PORT->Group[0].PMUX[PIN_PA24G_USB_DM/2].reg |= MUX_PA24G_USB_DM << (4 * (PIN_PA24G_USB_DM & 0x01u));
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| 87 | PORT->Group[0].PINCFG[PIN_PA25G_USB_DP].bit.PMUXEN = 1;
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| 88 | PORT->Group[0].PMUX[PIN_PA25G_USB_DP/2].reg &= ~(0xF << (4 * (PIN_PA25G_USB_DP & 0x01u)));
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| 89 | PORT->Group[0].PMUX[PIN_PA25G_USB_DP/2].reg |= MUX_PA25G_USB_DP << (4 * (PIN_PA25G_USB_DP & 0x01u));
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| 90 |
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| 91 | /* ----------------------------------------------------------------------------------------------
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| 92 | * Put Generic Clock Generator 0 as source for Generic Clock Multiplexer 6 (USB reference)
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| 93 | */
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| 94 | GCLK->CLKCTRL.reg = GCLK_CLKCTRL_ID( 6 ) | // Generic Clock Multiplexer 6
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| 95 | GCLK_CLKCTRL_GEN_GCLK0 | // Generic Clock Generator 0 is source
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| 96 | GCLK_CLKCTRL_CLKEN ;
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| 97 |
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| 98 | while ( GCLK->STATUS.reg & GCLK_STATUS_SYNCBUSY )
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| 99 | {
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| 100 | /* Wait for synchronization */
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| 101 | }
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| 102 |
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| 103 | /* Reset */
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| 104 | USB->DEVICE.CTRLA.bit.SWRST = 1;
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| 105 | while (USB->DEVICE.SYNCBUSY.bit.SWRST) {
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| 106 | /* Sync wait */
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| 107 | }
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| 108 |
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| 109 | udd_enable();
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| 110 |
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| 111 | /* Load Pad Calibration */
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| 112 | pad_transn =( *((uint32_t *)(NVMCTRL_OTP4) // Non-Volatile Memory Controller
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| 113 | + (NVM_USB_PAD_TRANSN_POS / 32))
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| 114 | >> (NVM_USB_PAD_TRANSN_POS % 32))
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| 115 | & ((1 << NVM_USB_PAD_TRANSN_SIZE) - 1);
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| 116 |
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| 117 | if (pad_transn == 0x1F) { // maximum value (31)
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| 118 | pad_transn = 5;
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| 119 | }
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| 120 |
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| 121 | USB->DEVICE.PADCAL.bit.TRANSN = pad_transn;
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| 122 |
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| 123 | pad_transp =( *((uint32_t *)(NVMCTRL_OTP4)
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| 124 | + (NVM_USB_PAD_TRANSP_POS / 32))
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| 125 | >> (NVM_USB_PAD_TRANSP_POS % 32))
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| 126 | & ((1 << NVM_USB_PAD_TRANSP_SIZE) - 1);
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| 127 |
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| 128 | if (pad_transp == 0x1F) { // maximum value (31)
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| 129 | pad_transp = 29;
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| 130 | }
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| 131 |
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| 132 | USB->DEVICE.PADCAL.bit.TRANSP = pad_transp;
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| 133 |
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| 134 | pad_trim =( *((uint32_t *)(NVMCTRL_OTP4)
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| 135 | + (NVM_USB_PAD_TRIM_POS / 32))
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| 136 | >> (NVM_USB_PAD_TRIM_POS % 32))
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| 137 | & ((1 << NVM_USB_PAD_TRIM_SIZE) - 1);
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| 138 |
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| 139 | if (pad_trim == 0x7) { // maximum value (7)
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| 140 | pad_trim = 3;
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| 141 | }
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| 142 |
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| 143 | USB->DEVICE.PADCAL.bit.TRIM = pad_trim;
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| 144 |
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| 145 | /* Set the configuration */
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| 146 | udd_force_device_mode();
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| 147 | udd_device_run_in_standby();
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| 148 | // Set address of USB SRAM
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| 149 | USB->DEVICE.DESCADD.reg = (uint32_t)(&usb_endpoint_table[0]);
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| 150 | // For USB_SPEED_FULL
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| 151 | udd_force_full_speed();
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| 152 | for (i = 0; i < sizeof(usb_endpoint_table)/4; i++) {
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| 153 | (*(uint32_t *)((uint32_t *)(&usb_endpoint_table[0])+i)) = 0;
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| 154 | }
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| 155 |
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| 156 | // Configure interrupts
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| 157 | NVIC_SetPriority((IRQn_Type) USB_IRQn, 0UL);
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| 158 | NVIC_EnableIRQ((IRQn_Type) USB_IRQn);
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| 159 | }
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| 160 |
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| 161 | void UDD_Attach(void)
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| 162 | {
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| 163 | TRACE_DEVICE(printf("=> UDD_Attach\r\n");)
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| 164 |
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| 165 | // Authorize attach if Vbus is present
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| 166 | udd_attach_device();
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| 167 |
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| 168 | // Enable USB line events
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| 169 | udd_enable_reset_interrupt();
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| 170 |
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| 171 | // usefull for debug
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| 172 | udd_enable_sof_interrupt();
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| 173 | }
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| 174 |
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| 175 | void UDD_Detach(void)
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| 176 | {
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| 177 | TRACE_DEVICE(printf("=> UDD_Detach\r\n");)
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| 178 | udd_detach_device();
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| 179 | }
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| 180 |
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| 181 | void send_zlp(void)
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| 182 | {
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| 183 | /* Set the byte count as zero */
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| 184 | usb_endpoint_table[0].DeviceDescBank[1].PCKSIZE.bit.BYTE_COUNT = 0;
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| 185 | }
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| 186 |
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| 187 |
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| 188 | void UDD_InitEP( uint32_t ul_ep_nb, uint32_t ul_ep_cfg )
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| 189 | {
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| 190 | TRACE_DEVICE(printf("=> UDD_InitEP : init EP %lu\r\n", (unsigned long)ul_ep_nb);)
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| 191 |
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| 192 | if( ul_ep_cfg == (USB_ENDPOINT_TYPE_INTERRUPT | USB_ENDPOINT_IN(0)) )
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| 193 | {
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| 194 | USB->DEVICE.DeviceEndpoint[ul_ep_nb].EPCFG.reg = USB_DEVICE_EPCFG_EPTYPE1(4);
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| 195 | /* Set maximum packet size as 8 bytes */
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| 196 | usb_endpoint_table[ul_ep_nb].DeviceDescBank[1].PCKSIZE.bit.SIZE = 0; // 8 bytes
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| 197 | /* Configure the data buffer */
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| 198 | usb_endpoint_table[ul_ep_nb].DeviceDescBank[1].ADDR.reg = (uint32_t)&udd_ep_in_cache_buffer[ul_ep_nb];
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| 199 | }
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| 200 | else if( ul_ep_cfg == (USB_ENDPOINT_TYPE_BULK | USB_ENDPOINT_OUT(0)) )
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| 201 | {
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| 202 | /* Configure BULK OUT endpoint for CDC Data interface*/
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| 203 | USB->DEVICE.DeviceEndpoint[ul_ep_nb].EPCFG.reg = USB_DEVICE_EPCFG_EPTYPE0(3);
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| 204 | /* Set maximum packet size as 64 bytes */
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| 205 | usb_endpoint_table[ul_ep_nb].DeviceDescBank[0].PCKSIZE.bit.SIZE = 0x3; // for 64 bytes
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| 206 | /* Configure the data buffer */
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| 207 | usb_endpoint_table[ul_ep_nb].DeviceDescBank[0].ADDR.reg = (uint32_t)&udd_ep_out_cache_buffer[ul_ep_nb];
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| 208 |
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| 209 | usb_endpoint_table[ul_ep_nb].DeviceDescBank[0].PCKSIZE.bit.MULTI_PACKET_SIZE = 64;
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| 210 | usb_endpoint_table[ul_ep_nb].DeviceDescBank[0].PCKSIZE.bit.BYTE_COUNT = 0;
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| 211 | // NACK if not ready
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| 212 | USB->DEVICE.DeviceEndpoint[ul_ep_nb].EPSTATUSCLR.reg = USB_DEVICE_EPSTATUSCLR_BK0RDY;
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| 213 | }
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| 214 | else if( ul_ep_cfg == (USB_ENDPOINT_TYPE_BULK | USB_ENDPOINT_IN(0)) )
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| 215 | {
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| 216 | /* Configure BULK IN endpoint for CDC Data interface */
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| 217 | USB->DEVICE.DeviceEndpoint[ul_ep_nb].EPCFG.reg = USB_DEVICE_EPCFG_EPTYPE1(3);
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| 218 | /* Set maximum packet size as 64 bytes */
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| 219 | usb_endpoint_table[ul_ep_nb].DeviceDescBank[1].PCKSIZE.bit.SIZE = 0x3; // for 64 bytes
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| 220 | /* Configure the data buffer */
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| 221 | usb_endpoint_table[ul_ep_nb].DeviceDescBank[1].ADDR.reg = (uint32_t)&udd_ep_in_cache_buffer[ul_ep_nb];
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| 222 | // NACK if not ready
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| 223 | USB->DEVICE.DeviceEndpoint[ul_ep_nb].EPSTATUSCLR.reg = USB_DEVICE_EPSTATUSCLR_BK1RDY;
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| 224 | }
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| 225 | else if( ul_ep_cfg == USB_ENDPOINT_TYPE_CONTROL )
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| 226 | {
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| 227 | /* Configure CONTROL endpoint */
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| 228 | USB->DEVICE.DeviceEndpoint[ul_ep_nb].EPCFG.reg = USB_DEVICE_EPCFG_EPTYPE0(1) | USB_DEVICE_EPCFG_EPTYPE1(1);
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| 229 | USB->DEVICE.DeviceEndpoint[ul_ep_nb].EPSTATUSSET.reg = USB_DEVICE_EPSTATUSSET_BK0RDY;
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| 230 | USB->DEVICE.DeviceEndpoint[ul_ep_nb].EPSTATUSCLR.reg = USB_DEVICE_EPSTATUSCLR_BK1RDY;
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| 231 |
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| 232 | usb_endpoint_table[ul_ep_nb].DeviceDescBank[0].PCKSIZE.reg &= ~USB_DEVICE_PCKSIZE_AUTO_ZLP;
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| 233 | usb_endpoint_table[ul_ep_nb].DeviceDescBank[1].PCKSIZE.reg &= ~USB_DEVICE_PCKSIZE_AUTO_ZLP;
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| 234 |
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| 235 | /* Set maximum packet size as 64 bytes */
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| 236 | usb_endpoint_table[ul_ep_nb].DeviceDescBank[0].PCKSIZE.bit.SIZE = 0x3; // for 64 bytes
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| 237 | usb_endpoint_table[ul_ep_nb].DeviceDescBank[1].PCKSIZE.bit.SIZE = 0x3; // for 64 bytes
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| 238 |
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| 239 | /* get endpoint configuration from setting register */
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| 240 | usb_endpoint_table[ul_ep_nb].DeviceDescBank[0].ADDR.reg = (uint32_t)&udd_ep_out_cache_buffer[0];
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| 241 | usb_endpoint_table[ul_ep_nb].DeviceDescBank[0].PCKSIZE.bit.MULTI_PACKET_SIZE = 16;
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| 242 | usb_endpoint_table[ul_ep_nb].DeviceDescBank[0].PCKSIZE.bit.BYTE_COUNT = 0;
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| 243 |
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| 244 | // NACK if not ready
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| 245 | USB->DEVICE.DeviceEndpoint[ul_ep_nb].EPSTATUSSET.reg = USB_DEVICE_EPSTATUSSET_BK0RDY;
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| 246 | USB->DEVICE.DeviceEndpoint[ul_ep_nb].EPSTATUSCLR.reg = USB_DEVICE_EPSTATUSCLR_BK1RDY;
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| 247 | }
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| 248 | }
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| 249 |
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| 250 |
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| 251 | // Send packet.
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| 252 | void UDD_ClearIN(void)
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| 253 | {
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| 254 | USB->DEVICE.DeviceEndpoint[EP0].EPSTATUSSET.reg = USB_DEVICE_EPSTATUSSET_BK1RDY;
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| 255 | }
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| 256 |
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| 257 |
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| 258 |
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| 259 | uint32_t UDD_Send(uint32_t ep, const void* data, uint32_t len)
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| 260 | {
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| 261 | memcpy(&udd_ep_in_cache_buffer[ep], data, len);
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| 262 |
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| 263 | /* Get endpoint configuration from setting register */
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| 264 | usb_endpoint_table[ep].DeviceDescBank[1].ADDR.reg = (uint32_t)&udd_ep_in_cache_buffer[ep];
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| 265 | usb_endpoint_table[ep].DeviceDescBank[1].PCKSIZE.bit.MULTI_PACKET_SIZE = 0;
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| 266 | usb_endpoint_table[ep].DeviceDescBank[1].PCKSIZE.bit.BYTE_COUNT = len;
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| 267 |
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| 268 | return len;
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| 269 | }
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| 270 |
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| 271 | uint8_t UDD_Recv8(uint32_t ep)
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| 272 | {
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| 273 | TRACE_DEVICE(printf("=> UDD_Recv8 : ep=%d\r\n", (char)ep);)
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| 274 |
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| 275 | usb_endpoint_table[ep].DeviceDescBank[0].ADDR.reg = (uint32_t)&udd_ep_out_cache_buffer[ep];
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| 276 | usb_endpoint_table[ep].DeviceDescBank[0].PCKSIZE.bit.MULTI_PACKET_SIZE = 8;
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| 277 | usb_endpoint_table[ep].DeviceDescBank[0].PCKSIZE.bit.BYTE_COUNT = 0;
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| 278 | USB->DEVICE.DeviceEndpoint[ep].EPSTATUSCLR.reg = USB_DEVICE_EPSTATUSCLR_BK0RDY;
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| 279 | TRACE_DEVICE(printf("=> UDD_Recv8 : data=%lu\r\n", (unsigned long)data);)
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| 280 |
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| 281 | /* Wait for transfer to complete */
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| 282 | while (!( USB->DEVICE.DeviceEndpoint[ep].EPINTFLAG.reg & USB_DEVICE_EPINTFLAG_TRCPT0 ));
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| 283 | /* Clear Transfer complete 0 flag */
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| 284 | USB->DEVICE.DeviceEndpoint[ep].EPINTFLAG.bit.TRCPT0 = 1;
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| 285 |
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| 286 | return udd_ep_out_cache_buffer[ep][0];
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| 287 | }
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| 288 |
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| 289 | void UDD_Recv(uint32_t ep, uint8_t** ppData)
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| 290 | {
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| 291 | *ppData = udd_ep_out_cache_buffer[ep];
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| 292 | }
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| 293 |
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| 294 | void UDD_Stall(uint32_t ep)
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| 295 | {
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| 296 | uint8_t ep_num = ep;
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| 297 |
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| 298 | // Stall endpoint
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| 299 | USB->DEVICE.DeviceEndpoint[ep_num].EPSTATUSSET.reg = USB_DEVICE_EPSTATUSSET_STALLRQ1;
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| 300 | }
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| 301 |
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| 302 | uint32_t UDD_FifoByteCount(uint32_t ep)
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| 303 | {
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| 304 | return ((uint16_t)(usb_endpoint_table[ep].DeviceDescBank[0].PCKSIZE.bit.BYTE_COUNT));
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| 305 | }
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| 306 |
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| 307 | void UDD_ReleaseRX(uint32_t ep)
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| 308 | {
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| 309 | TRACE_DEVICE(puts("=> UDD_ReleaseRX\r\n");)
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| 310 | USB->DEVICE.DeviceEndpoint[ep].EPSTATUSCLR.reg = USB_DEVICE_EPSTATUSCLR_BK0RDY;
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| 311 | USB->DEVICE.DeviceEndpoint[ep].EPINTFLAG.reg = USB_DEVICE_EPINTFLAG_TRCPT0;
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| 312 | }
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| 313 |
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| 314 | void UDD_ReleaseTX(uint32_t ep)
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| 315 | {
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| 316 | TRACE_DEVICE(printf("=> UDD_ReleaseTX ep=%lu\r\n", (unsigned long)ep);)
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| 317 | USB->DEVICE.DeviceEndpoint[ep].EPSTATUSSET.reg = USB_DEVICE_EPSTATUSSET_BK1RDY;
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| 318 | USB->DEVICE.DeviceEndpoint[ep].EPINTFLAG.reg = USB_DEVICE_EPINTFLAG_TRCPT1;
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| 319 | }
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| 320 |
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| 321 | void UDD_SetAddress(uint32_t addr)
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| 322 | {
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| 323 | TRACE_DEVICE(printf("=> UDD_SetAddress : setting address to %lu\r\n", (unsigned long)addr);)
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| 324 |
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| 325 | /* Set the byte count as zero */
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| 326 | usb_endpoint_table[0].DeviceDescBank[1].PCKSIZE.bit.BYTE_COUNT = 0;
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| 327 | /* Clear the transfer complete flag */
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| 328 | USB->DEVICE.DeviceEndpoint[0].EPINTFLAG.bit.TRCPT1 = 1;
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| 329 | /* Set the bank as ready */
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| 330 | USB->DEVICE.DeviceEndpoint[0].EPSTATUSSET.bit.BK1RDY = 1;
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| 331 |
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| 332 | /* Wait for transfer to complete */
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| 333 | while (!( USB->DEVICE.DeviceEndpoint[0].EPINTFLAG.reg & USB_DEVICE_EPINTFLAG_TRCPT1 )) {}
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| 334 |
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| 335 | udd_configure_address(addr);
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| 336 | }
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| 337 |
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| 338 | uint32_t UDD_GetFrameNumber(void)
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| 339 | {
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| 340 | return udd_frame_number();
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| 341 | }
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| 342 |
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| 343 | #ifdef __cplusplus
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| 344 | }
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| 345 | #endif
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| 346 |
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| 347 | #endif /* SAMD_SERIES */
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| 348 |
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