1 | /*
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2 | Copyright (c) 2015 Arduino LLC. All right reserved.
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3 |
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4 | This library is free software; you can redistribute it and/or
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5 | modify it under the terms of the GNU Lesser General Public
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6 | License as published by the Free Software Foundation; either
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7 | version 2.1 of the License, or (at your option) any later version.
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8 |
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9 | This library is distributed in the hope that it will be useful,
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10 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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12 | See the GNU Lesser General Public License for more details.
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13 |
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14 | You should have received a copy of the GNU Lesser General Public
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15 | License along with this library; if not, write to the Free Software
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16 | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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17 | */
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18 | /*
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19 | **Modified 04/04/2016 by Arduino.org development team
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20 | */
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21 |
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22 | #pragma once
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23 |
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24 | #include <Arduino.h>
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25 |
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26 | #include <stdlib.h>
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27 | #include <stdio.h>
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28 | #include <stdint.h>
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29 |
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30 | typedef uint8_t ep_t;
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31 |
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32 | class USBDevice_SAMD21G18x {
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33 | public:
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34 | USBDevice_SAMD21G18x() : usb(USB->DEVICE) {
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35 | // Empty
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36 | }
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37 |
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38 | // USB Device function mapping
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39 | // ---------------------------
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40 |
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41 | // Reset USB Device
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42 | void reset();
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43 |
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44 | // Enable
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45 | inline void enable() { usb.CTRLA.bit.ENABLE = 1; }
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46 | inline void disable() { usb.CTRLA.bit.ENABLE = 0; }
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47 |
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48 | // USB mode (device/host)
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49 | inline void setUSBDeviceMode() { usb.CTRLA.bit.MODE = USB_CTRLA_MODE_DEVICE_Val; }
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50 | inline void setUSBHostMode() { usb.CTRLA.bit.MODE = USB_CTRLA_MODE_HOST_Val; }
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51 |
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52 | inline void runInStandby() { usb.CTRLA.bit.RUNSTDBY = 1; }
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53 | inline void noRunInStandby() { usb.CTRLA.bit.RUNSTDBY = 0; }
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54 |
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55 | // USB speed
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56 | inline void setFullSpeed() { usb.CTRLB.bit.SPDCONF = USB_DEVICE_CTRLB_SPDCONF_0_Val; }
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57 | inline void setLowSpeed() { usb.CTRLB.bit.SPDCONF = USB_DEVICE_CTRLB_SPDCONF_1_Val; }
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58 | inline void setHiSpeed() { usb.CTRLB.bit.SPDCONF = USB_DEVICE_CTRLB_SPDCONF_2_Val; }
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59 | inline void setHiSpeedTestMode() { usb.CTRLB.bit.SPDCONF = USB_DEVICE_CTRLB_SPDCONF_3_Val; }
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60 |
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61 | // Authorize attach if Vbus is present
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62 | inline void attach() { usb.CTRLB.bit.DETACH = 0; }
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63 | inline void detach() { usb.CTRLB.bit.DETACH = 1; }
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64 |
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65 | // USB Interrupts
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66 | inline bool isEndOfResetInterrupt() { return usb.INTFLAG.bit.EORST; }
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67 | inline void ackEndOfResetInterrupt() { usb.INTFLAG.reg = USB_DEVICE_INTFLAG_EORST; }
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68 | inline void enableEndOfResetInterrupt() { usb.INTENSET.bit.EORST = 1; }
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69 | inline void disableEndOfResetInterrupt() { usb.INTENCLR.bit.EORST = 1; }
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70 |
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71 | inline bool isStartOfFrameInterrupt() { return usb.INTFLAG.bit.SOF; }
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72 | inline void ackStartOfFrameInterrupt() { usb.INTFLAG.reg = USB_DEVICE_INTFLAG_SOF; }
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73 | inline void enableStartOfFrameInterrupt() { usb.INTENSET.bit.SOF = 1; }
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74 | inline void disableStartOfFrameInterrupt() { usb.INTENCLR.bit.SOF = 1; }
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75 |
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76 | // USB Address
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77 | inline void setAddress(uint32_t addr) { usb.DADD.bit.DADD = addr; usb.DADD.bit.ADDEN = 1; }
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78 | inline void unsetAddress() { usb.DADD.bit.DADD = 0; usb.DADD.bit.ADDEN = 0; }
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79 |
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80 | // Frame number
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81 | inline uint16_t frameNumber() { return usb.FNUM.bit.FNUM; }
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82 |
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83 | // Load calibration values
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84 | void calibrate();
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85 |
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86 | // USB Device Endpoints function mapping
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87 | // -------------------------------------
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88 |
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89 | // Config
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90 | inline void epBank0SetType(ep_t ep, uint8_t type) { usb.DeviceEndpoint[ep].EPCFG.bit.EPTYPE0 = type; }
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91 | inline void epBank1SetType(ep_t ep, uint8_t type) { usb.DeviceEndpoint[ep].EPCFG.bit.EPTYPE1 = type; }
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92 |
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93 | // Interrupts
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94 | inline uint16_t epInterruptSummary() { return usb.EPINTSMRY.reg; }
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95 |
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96 | inline bool epBank0IsSetupReceived(ep_t ep) { return usb.DeviceEndpoint[ep].EPINTFLAG.bit.RXSTP; }
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97 | inline bool epBank0IsStalled(ep_t ep) { return usb.DeviceEndpoint[ep].EPINTFLAG.bit.STALL0; }
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98 | inline bool epBank1IsStalled(ep_t ep) { return usb.DeviceEndpoint[ep].EPINTFLAG.bit.STALL1; }
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99 | inline bool epBank0IsTransferComplete(ep_t ep) { return usb.DeviceEndpoint[ep].EPINTFLAG.bit.TRCPT0; }
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100 | inline bool epBank1IsTransferComplete(ep_t ep) { return usb.DeviceEndpoint[ep].EPINTFLAG.bit.TRCPT1; }
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101 |
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102 | inline void epBank0AckSetupReceived(ep_t ep) { usb.DeviceEndpoint[ep].EPINTFLAG.reg = USB_DEVICE_EPINTFLAG_RXSTP; }
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103 | inline void epBank0AckStalled(ep_t ep) { usb.DeviceEndpoint[ep].EPINTFLAG.reg = USB_DEVICE_EPINTFLAG_STALL(1); }
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104 | inline void epBank1AckStalled(ep_t ep) { usb.DeviceEndpoint[ep].EPINTFLAG.reg = USB_DEVICE_EPINTFLAG_STALL(2); }
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105 | inline void epBank0AckTransferComplete(ep_t ep) { usb.DeviceEndpoint[ep].EPINTFLAG.reg = USB_DEVICE_EPINTFLAG_TRCPT(1); }
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106 | inline void epBank1AckTransferComplete(ep_t ep) { usb.DeviceEndpoint[ep].EPINTFLAG.reg = USB_DEVICE_EPINTFLAG_TRCPT(2); }
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107 |
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108 | inline void epBank0EnableSetupReceived(ep_t ep) { usb.DeviceEndpoint[ep].EPINTENSET.bit.RXSTP = 1; }
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109 | inline void epBank0EnableStalled(ep_t ep) { usb.DeviceEndpoint[ep].EPINTENSET.bit.STALL0 = 1; }
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110 | inline void epBank1EnableStalled(ep_t ep) { usb.DeviceEndpoint[ep].EPINTENSET.bit.STALL1 = 1; }
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111 | inline void epBank0EnableTransferComplete(ep_t ep) { usb.DeviceEndpoint[ep].EPINTENSET.bit.TRCPT0 = 1; }
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112 | inline void epBank1EnableTransferComplete(ep_t ep) { usb.DeviceEndpoint[ep].EPINTENSET.bit.TRCPT1 = 1; }
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113 |
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114 | inline void epBank0DisableSetupReceived(ep_t ep) { usb.DeviceEndpoint[ep].EPINTENCLR.bit.RXSTP = 1; }
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115 | inline void epBank0DisableStalled(ep_t ep) { usb.DeviceEndpoint[ep].EPINTENCLR.bit.STALL0 = 1; }
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116 | inline void epBank1DisableStalled(ep_t ep) { usb.DeviceEndpoint[ep].EPINTENCLR.bit.STALL1 = 1; }
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117 | inline void epBank0DisableTransferComplete(ep_t ep) { usb.DeviceEndpoint[ep].EPINTENCLR.bit.TRCPT0 = 1; }
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118 | inline void epBank1DisableTransferComplete(ep_t ep) { usb.DeviceEndpoint[ep].EPINTENCLR.bit.TRCPT1 = 1; }
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119 |
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120 | // Status
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121 | inline bool epBank0IsReady(ep_t ep) { return usb.DeviceEndpoint[ep].EPSTATUS.bit.BK0RDY; }
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122 | inline bool epBank1IsReady(ep_t ep) { return usb.DeviceEndpoint[ep].EPSTATUS.bit.BK1RDY; }
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123 | inline void epBank0SetReady(ep_t ep) { usb.DeviceEndpoint[ep].EPSTATUSSET.bit.BK0RDY = 1; }
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124 | inline void epBank1SetReady(ep_t ep) { usb.DeviceEndpoint[ep].EPSTATUSSET.bit.BK1RDY = 1; }
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125 | inline void epBank0ResetReady(ep_t ep) { usb.DeviceEndpoint[ep].EPSTATUSCLR.bit.BK0RDY = 1; }
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126 | inline void epBank1ResetReady(ep_t ep) { usb.DeviceEndpoint[ep].EPSTATUSCLR.bit.BK1RDY = 1; }
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127 |
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128 | inline void epBank0SetStallReq(ep_t ep) { usb.DeviceEndpoint[ep].EPSTATUSSET.bit.STALLRQ0 = 1; }
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129 | inline void epBank1SetStallReq(ep_t ep) { usb.DeviceEndpoint[ep].EPSTATUSSET.bit.STALLRQ1 = 1; }
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130 | inline void epBank0ResetStallReq(ep_t ep) { usb.DeviceEndpoint[ep].EPSTATUSCLR.bit.STALLRQ0 = 1; }
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131 | inline void epBank1ResetStallReq(ep_t ep) { usb.DeviceEndpoint[ep].EPSTATUSCLR.bit.STALLRQ1 = 1; }
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132 |
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133 | // Packet
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134 | inline uint16_t epBank0ByteCount(ep_t ep) { return EP[ep].DeviceDescBank[0].PCKSIZE.bit.BYTE_COUNT; }
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135 | inline uint16_t epBank1ByteCount(ep_t ep) { return EP[ep].DeviceDescBank[1].PCKSIZE.bit.BYTE_COUNT; }
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136 | inline void epBank0SetByteCount(ep_t ep, uint16_t bc) { EP[ep].DeviceDescBank[0].PCKSIZE.bit.BYTE_COUNT = bc; }
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137 | inline void epBank1SetByteCount(ep_t ep, uint16_t bc) { EP[ep].DeviceDescBank[1].PCKSIZE.bit.BYTE_COUNT = bc; }
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138 | inline void epBank0SetMultiPacketSize(ep_t ep, uint16_t s) { EP[ep].DeviceDescBank[0].PCKSIZE.bit.MULTI_PACKET_SIZE = s; }
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139 | inline void epBank1SetMultiPacketSize(ep_t ep, uint16_t s) { EP[ep].DeviceDescBank[1].PCKSIZE.bit.MULTI_PACKET_SIZE = s; }
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140 |
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141 | inline void epBank0SetAddress(ep_t ep, void *addr) { EP[ep].DeviceDescBank[0].ADDR.reg = (uint32_t)addr; }
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142 | inline void epBank1SetAddress(ep_t ep, void *addr) { EP[ep].DeviceDescBank[1].ADDR.reg = (uint32_t)addr; }
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143 | inline void epBank0SetSize(ep_t ep, uint16_t size) { EP[ep].DeviceDescBank[0].PCKSIZE.bit.SIZE = EP_PCKSIZE_SIZE(size); }
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144 | inline void epBank1SetSize(ep_t ep, uint16_t size) { EP[ep].DeviceDescBank[1].PCKSIZE.bit.SIZE = EP_PCKSIZE_SIZE(size); }
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145 | inline uint8_t EP_PCKSIZE_SIZE(uint16_t size) {
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146 | switch (size) {
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147 | case 8: return 0;
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148 | case 16: return 1;
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149 | case 32: return 2;
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150 | case 64: return 3;
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151 | case 128: return 4;
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152 | case 256: return 5;
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153 | case 512: return 6;
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154 | case 1023: return 7;
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155 | default: return 0;
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156 | }
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157 | }
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158 |
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159 | inline void epBank0DisableAutoZLP(ep_t ep) { EP[ep].DeviceDescBank[0].PCKSIZE.bit.AUTO_ZLP = 0; }
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160 | inline void epBank1DisableAutoZLP(ep_t ep) { EP[ep].DeviceDescBank[1].PCKSIZE.bit.AUTO_ZLP = 0; }
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161 | inline void epBank0EnableAutoZLP(ep_t ep) { EP[ep].DeviceDescBank[0].PCKSIZE.bit.AUTO_ZLP = 1; }
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162 | inline void epBank1EnableAutoZLP(ep_t ep) { EP[ep].DeviceDescBank[1].PCKSIZE.bit.AUTO_ZLP = 1; }
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163 |
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164 | private:
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165 | // USB Device registers
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166 | UsbDevice &usb;
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167 |
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168 | // Endpoints descriptors table
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169 | __attribute__((__aligned__(4))) UsbDeviceDescriptor EP[USB_EPT_NUM];
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170 | };
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171 |
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172 | void USBDevice_SAMD21G18x::reset() {
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173 | usb.CTRLA.bit.SWRST = 1;
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174 | memset(EP, 0, sizeof(EP));
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175 | while (usb.SYNCBUSY.bit.SWRST) {}
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176 | usb.DESCADD.reg = (uint32_t)(&EP);
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177 | }
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178 |
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179 | void USBDevice_SAMD21G18x::calibrate() {
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180 | // Load Pad Calibration data from non-volatile memory
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181 | uint32_t *pad_transn_p = (uint32_t *) USB_FUSES_TRANSN_ADDR;
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182 | uint32_t *pad_transp_p = (uint32_t *) USB_FUSES_TRANSP_ADDR;
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183 | uint32_t *pad_trim_p = (uint32_t *) USB_FUSES_TRIM_ADDR;
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184 |
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185 | uint32_t pad_transn = (*pad_transn_p & USB_FUSES_TRANSN_Msk) >> USB_FUSES_TRANSN_Pos;
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186 | uint32_t pad_transp = (*pad_transp_p & USB_FUSES_TRANSP_Msk) >> USB_FUSES_TRANSP_Pos;
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187 | uint32_t pad_trim = (*pad_trim_p & USB_FUSES_TRIM_Msk ) >> USB_FUSES_TRIM_Pos;
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188 |
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189 | if (pad_transn == 0x1F) // maximum value (31)
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190 | pad_transn = 5;
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191 | if (pad_transp == 0x1F) // maximum value (31)
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192 | pad_transp = 29;
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193 | if (pad_trim == 0x7) // maximum value (7)
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194 | pad_trim = 3;
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195 |
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196 | usb.PADCAL.bit.TRANSN = pad_transn;
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197 | usb.PADCAL.bit.TRANSP = pad_transp;
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198 | usb.PADCAL.bit.TRIM = pad_trim;
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199 | }
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200 |
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