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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