197 lines
9.4 KiB
C++
197 lines
9.4 KiB
C++
/*
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Copyright (c) 2015 Arduino LLC. All right reserved.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#pragma once
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#include <Arduino.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdint.h>
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typedef uint8_t ep_t;
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class USBDevice_SAMR21G18x {
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public:
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USBDevice_SAMR21G18x() : usb(USB->DEVICE) {
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// Empty
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}
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// USB Device function mapping
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// ---------------------------
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// Reset USB Device
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void reset();
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// Enable
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inline void enable() { usb.CTRLA.bit.ENABLE = 1; }
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inline void disable() { usb.CTRLA.bit.ENABLE = 0; }
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// USB mode (device/host)
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inline void setUSBDeviceMode() { usb.CTRLA.bit.MODE = USB_CTRLA_MODE_DEVICE_Val; }
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inline void setUSBHostMode() { usb.CTRLA.bit.MODE = USB_CTRLA_MODE_HOST_Val; }
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inline void runInStandby() { usb.CTRLA.bit.RUNSTDBY = 1; }
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inline void noRunInStandby() { usb.CTRLA.bit.RUNSTDBY = 0; }
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// USB speed
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inline void setFullSpeed() { usb.CTRLB.bit.SPDCONF = USB_DEVICE_CTRLB_SPDCONF_FS_Val; }
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inline void setLowSpeed() { usb.CTRLB.bit.SPDCONF = USB_DEVICE_CTRLB_SPDCONF_LS_Val; }
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inline void setHiSpeed() { usb.CTRLB.bit.SPDCONF = USB_DEVICE_CTRLB_SPDCONF_HS_Val; }
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inline void setHiSpeedTestMode() { usb.CTRLB.bit.SPDCONF = USB_DEVICE_CTRLB_SPDCONF_HSTM_Val; }
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// Authorize attach if Vbus is present
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inline void attach() { usb.CTRLB.bit.DETACH = 0; }
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inline void detach() { usb.CTRLB.bit.DETACH = 1; }
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// USB Interrupts
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inline bool isEndOfResetInterrupt() { return usb.INTFLAG.bit.EORST; }
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inline void ackEndOfResetInterrupt() { usb.INTFLAG.reg = USB_DEVICE_INTFLAG_EORST; }
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inline void enableEndOfResetInterrupt() { usb.INTENSET.bit.EORST = 1; }
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inline void disableEndOfResetInterrupt() { usb.INTENCLR.bit.EORST = 1; }
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inline bool isStartOfFrameInterrupt() { return usb.INTFLAG.bit.SOF; }
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inline void ackStartOfFrameInterrupt() { usb.INTFLAG.reg = USB_DEVICE_INTFLAG_SOF; }
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inline void enableStartOfFrameInterrupt() { usb.INTENSET.bit.SOF = 1; }
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inline void disableStartOfFrameInterrupt() { usb.INTENCLR.bit.SOF = 1; }
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// USB Address
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inline void setAddress(uint32_t addr) { usb.DADD.bit.DADD = addr; usb.DADD.bit.ADDEN = 1; }
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inline void unsetAddress() { usb.DADD.bit.DADD = 0; usb.DADD.bit.ADDEN = 0; }
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// Frame number
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inline uint16_t frameNumber() { return usb.FNUM.bit.FNUM; }
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// Load calibration values
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void calibrate();
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// USB Device Endpoints function mapping
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// -------------------------------------
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// Config
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inline void epBank0SetType(ep_t ep, uint8_t type) { usb.DeviceEndpoint[ep].EPCFG.bit.EPTYPE0 = type; }
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inline void epBank1SetType(ep_t ep, uint8_t type) { usb.DeviceEndpoint[ep].EPCFG.bit.EPTYPE1 = type; }
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// Interrupts
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inline uint16_t epInterruptSummary() { return usb.EPINTSMRY.reg; }
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inline bool epBank0IsSetupReceived(ep_t ep) { return usb.DeviceEndpoint[ep].EPINTFLAG.bit.RXSTP; }
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inline bool epBank0IsStalled(ep_t ep) { return usb.DeviceEndpoint[ep].EPINTFLAG.bit.STALL0; }
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inline bool epBank1IsStalled(ep_t ep) { return usb.DeviceEndpoint[ep].EPINTFLAG.bit.STALL1; }
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inline bool epBank0IsTransferComplete(ep_t ep) { return usb.DeviceEndpoint[ep].EPINTFLAG.bit.TRCPT0; }
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inline bool epBank1IsTransferComplete(ep_t ep) { return usb.DeviceEndpoint[ep].EPINTFLAG.bit.TRCPT1; }
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inline void epBank0AckSetupReceived(ep_t ep) { usb.DeviceEndpoint[ep].EPINTFLAG.reg = USB_DEVICE_EPINTFLAG_RXSTP; }
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inline void epBank0AckStalled(ep_t ep) { usb.DeviceEndpoint[ep].EPINTFLAG.reg = USB_DEVICE_EPINTFLAG_STALL(1); }
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inline void epBank1AckStalled(ep_t ep) { usb.DeviceEndpoint[ep].EPINTFLAG.reg = USB_DEVICE_EPINTFLAG_STALL(2); }
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inline void epBank0AckTransferComplete(ep_t ep) { usb.DeviceEndpoint[ep].EPINTFLAG.reg = USB_DEVICE_EPINTFLAG_TRCPT(1); }
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inline void epBank1AckTransferComplete(ep_t ep) { usb.DeviceEndpoint[ep].EPINTFLAG.reg = USB_DEVICE_EPINTFLAG_TRCPT(2); }
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inline void epBank0EnableSetupReceived(ep_t ep) { usb.DeviceEndpoint[ep].EPINTENSET.bit.RXSTP = 1; }
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inline void epBank0EnableStalled(ep_t ep) { usb.DeviceEndpoint[ep].EPINTENSET.bit.STALL0 = 1; }
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inline void epBank1EnableStalled(ep_t ep) { usb.DeviceEndpoint[ep].EPINTENSET.bit.STALL1 = 1; }
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inline void epBank0EnableTransferComplete(ep_t ep) { usb.DeviceEndpoint[ep].EPINTENSET.bit.TRCPT0 = 1; }
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inline void epBank1EnableTransferComplete(ep_t ep) { usb.DeviceEndpoint[ep].EPINTENSET.bit.TRCPT1 = 1; }
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inline void epBank0DisableSetupReceived(ep_t ep) { usb.DeviceEndpoint[ep].EPINTENCLR.bit.RXSTP = 1; }
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inline void epBank0DisableStalled(ep_t ep) { usb.DeviceEndpoint[ep].EPINTENCLR.bit.STALL0 = 1; }
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inline void epBank1DisableStalled(ep_t ep) { usb.DeviceEndpoint[ep].EPINTENCLR.bit.STALL1 = 1; }
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inline void epBank0DisableTransferComplete(ep_t ep) { usb.DeviceEndpoint[ep].EPINTENCLR.bit.TRCPT0 = 1; }
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inline void epBank1DisableTransferComplete(ep_t ep) { usb.DeviceEndpoint[ep].EPINTENCLR.bit.TRCPT1 = 1; }
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// Status
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inline bool epBank0IsReady(ep_t ep) { return usb.DeviceEndpoint[ep].EPSTATUS.bit.BK0RDY; }
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inline bool epBank1IsReady(ep_t ep) { return usb.DeviceEndpoint[ep].EPSTATUS.bit.BK1RDY; }
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inline void epBank0SetReady(ep_t ep) { usb.DeviceEndpoint[ep].EPSTATUSSET.bit.BK0RDY = 1; }
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inline void epBank1SetReady(ep_t ep) { usb.DeviceEndpoint[ep].EPSTATUSSET.bit.BK1RDY = 1; }
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inline void epBank0ResetReady(ep_t ep) { usb.DeviceEndpoint[ep].EPSTATUSCLR.bit.BK0RDY = 1; }
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inline void epBank1ResetReady(ep_t ep) { usb.DeviceEndpoint[ep].EPSTATUSCLR.bit.BK1RDY = 1; }
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inline void epBank0SetStallReq(ep_t ep) { usb.DeviceEndpoint[ep].EPSTATUSSET.bit.STALLRQ0 = 1; }
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inline void epBank1SetStallReq(ep_t ep) { usb.DeviceEndpoint[ep].EPSTATUSSET.bit.STALLRQ1 = 1; }
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inline void epBank0ResetStallReq(ep_t ep) { usb.DeviceEndpoint[ep].EPSTATUSCLR.bit.STALLRQ0 = 1; }
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inline void epBank1ResetStallReq(ep_t ep) { usb.DeviceEndpoint[ep].EPSTATUSCLR.bit.STALLRQ1 = 1; }
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// Packet
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inline uint16_t epBank0ByteCount(ep_t ep) { return EP[ep].DeviceDescBank[0].PCKSIZE.bit.BYTE_COUNT; }
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inline uint16_t epBank1ByteCount(ep_t ep) { return EP[ep].DeviceDescBank[1].PCKSIZE.bit.BYTE_COUNT; }
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inline void epBank0SetByteCount(ep_t ep, uint16_t bc) { EP[ep].DeviceDescBank[0].PCKSIZE.bit.BYTE_COUNT = bc; }
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inline void epBank1SetByteCount(ep_t ep, uint16_t bc) { EP[ep].DeviceDescBank[1].PCKSIZE.bit.BYTE_COUNT = bc; }
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inline void epBank0SetMultiPacketSize(ep_t ep, uint16_t s) { EP[ep].DeviceDescBank[0].PCKSIZE.bit.MULTI_PACKET_SIZE = s; }
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inline void epBank1SetMultiPacketSize(ep_t ep, uint16_t s) { EP[ep].DeviceDescBank[1].PCKSIZE.bit.MULTI_PACKET_SIZE = s; }
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inline void epBank0SetAddress(ep_t ep, void *addr) { EP[ep].DeviceDescBank[0].ADDR.reg = (uint32_t)addr; }
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inline void epBank1SetAddress(ep_t ep, void *addr) { EP[ep].DeviceDescBank[1].ADDR.reg = (uint32_t)addr; }
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inline void epBank0SetSize(ep_t ep, uint16_t size) { EP[ep].DeviceDescBank[0].PCKSIZE.bit.SIZE = EP_PCKSIZE_SIZE(size); }
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inline void epBank1SetSize(ep_t ep, uint16_t size) { EP[ep].DeviceDescBank[1].PCKSIZE.bit.SIZE = EP_PCKSIZE_SIZE(size); }
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inline uint8_t EP_PCKSIZE_SIZE(uint16_t size) {
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switch (size) {
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case 8: return 0;
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case 16: return 1;
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case 32: return 2;
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case 64: return 3;
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case 128: return 4;
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case 256: return 5;
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case 512: return 6;
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case 1023: return 7;
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default: return 0;
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}
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}
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inline void epBank0DisableAutoZLP(ep_t ep) { EP[ep].DeviceDescBank[0].PCKSIZE.bit.AUTO_ZLP = 0; }
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inline void epBank1DisableAutoZLP(ep_t ep) { EP[ep].DeviceDescBank[1].PCKSIZE.bit.AUTO_ZLP = 0; }
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inline void epBank0EnableAutoZLP(ep_t ep) { EP[ep].DeviceDescBank[0].PCKSIZE.bit.AUTO_ZLP = 1; }
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inline void epBank1EnableAutoZLP(ep_t ep) { EP[ep].DeviceDescBank[1].PCKSIZE.bit.AUTO_ZLP = 1; }
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private:
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// USB Device registers
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UsbDevice &usb;
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// Endpoints descriptors table
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__attribute__((__aligned__(4))) UsbDeviceDescriptor EP[USB_EPT_NUM];
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};
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void USBDevice_SAMR21G18x::reset() {
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usb.CTRLA.bit.SWRST = 1;
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memset(EP, 0, sizeof(EP));
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while (usb.SYNCBUSY.bit.SWRST) {}
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usb.DESCADD.reg = (uint32_t)(&EP);
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}
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void USBDevice_SAMR21G18x::calibrate() {
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// Load Pad Calibration data from non-volatile memory
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uint32_t *pad_transn_p = (uint32_t *) USB_FUSES_TRANSN_ADDR;
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uint32_t *pad_transp_p = (uint32_t *) USB_FUSES_TRANSP_ADDR;
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uint32_t *pad_trim_p = (uint32_t *) USB_FUSES_TRIM_ADDR;
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uint32_t pad_transn = (*pad_transn_p & USB_FUSES_TRANSN_Msk) >> USB_FUSES_TRANSN_Pos;
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uint32_t pad_transp = (*pad_transp_p & USB_FUSES_TRANSP_Msk) >> USB_FUSES_TRANSP_Pos;
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uint32_t pad_trim = (*pad_trim_p & USB_FUSES_TRIM_Msk ) >> USB_FUSES_TRIM_Pos;
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if (pad_transn == 0x1F) // maximum value (31)
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pad_transn = 5;
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if (pad_transp == 0x1F) // maximum value (31)
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pad_transp = 29;
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if (pad_trim == 0x7) // maximum value (7)
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pad_trim = 3;
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usb.PADCAL.bit.TRANSN = pad_transn;
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usb.PADCAL.bit.TRANSP = pad_transp;
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usb.PADCAL.bit.TRIM = pad_trim;
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}
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