859 lines
19 KiB
C++
859 lines
19 KiB
C++
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/* Copyright (c) 2010, Peter Barrett
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** Sleep/Wakeup support added by Michael Dreher
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**
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** Permission to use, copy, modify, and/or distribute this software for
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** any purpose with or without fee is hereby granted, provided that the
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** above copyright notice and this permission notice appear in all copies.
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**
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** THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
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** WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
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** WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR
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** BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES
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** OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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** WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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** ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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** SOFTWARE.
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*/
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#include "USBAPI.h"
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#include "PluggableUSB.h"
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#include <stdlib.h>
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#if defined(USBCON)
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/** Pulse generation counters to keep track of the number of milliseconds remaining for each pulse type */
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#define TX_RX_LED_PULSE_MS 100
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volatile u8 TxLEDPulse; /**< Milliseconds remaining for data Tx LED pulse */
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volatile u8 RxLEDPulse; /**< Milliseconds remaining for data Rx LED pulse */
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//==================================================================
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//==================================================================
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extern const u16 STRING_LANGUAGE[] PROGMEM;
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extern const u8 STRING_PRODUCT[] PROGMEM;
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extern const u8 STRING_MANUFACTURER[] PROGMEM;
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extern const DeviceDescriptor USB_DeviceDescriptorIAD PROGMEM;
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const u16 STRING_LANGUAGE[2] = {
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(3<<8) | (2+2),
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0x0409 // English
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};
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#ifndef USB_PRODUCT
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// If no product is provided, use USB IO Board
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#define USB_PRODUCT "USB IO Board"
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#endif
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const u8 STRING_PRODUCT[] PROGMEM = USB_PRODUCT;
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#if USB_VID == 0x2341
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# if defined(USB_MANUFACTURER)
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# undef USB_MANUFACTURER
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# endif
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# define USB_MANUFACTURER "Arduino LLC"
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#elif USB_VID == 0x1b4f
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# if defined(USB_MANUFACTURER)
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# undef USB_MANUFACTURER
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# endif
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# define USB_MANUFACTURER "SparkFun"
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#elif !defined(USB_MANUFACTURER)
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// Fall through to unknown if no manufacturer name was provided in a macro
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# define USB_MANUFACTURER "Unknown"
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#endif
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const u8 STRING_MANUFACTURER[] PROGMEM = USB_MANUFACTURER;
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#define DEVICE_CLASS 0x02
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// DEVICE DESCRIPTOR
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const DeviceDescriptor USB_DeviceDescriptorIAD =
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D_DEVICE(0xEF,0x02,0x01,64,USB_VID,USB_PID,0x100,IMANUFACTURER,IPRODUCT,ISERIAL,1);
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//==================================================================
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//==================================================================
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volatile u8 _usbConfiguration = 0;
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volatile u8 _usbCurrentStatus = 0; // meaning of bits see usb_20.pdf, Figure 9-4. Information Returned by a GetStatus() Request to a Device
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volatile u8 _usbSuspendState = 0; // copy of UDINT to check SUSPI and WAKEUPI bits
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static inline void WaitIN(void)
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{
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while (!(UEINTX & (1<<TXINI)))
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;
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}
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static inline void ClearIN(void)
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{
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UEINTX = ~(1<<TXINI);
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}
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static inline void WaitOUT(void)
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{
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while (!(UEINTX & (1<<RXOUTI)))
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;
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}
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static inline u8 WaitForINOrOUT()
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{
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while (!(UEINTX & ((1<<TXINI)|(1<<RXOUTI))))
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;
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return (UEINTX & (1<<RXOUTI)) == 0;
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}
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static inline void ClearOUT(void)
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{
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UEINTX = ~(1<<RXOUTI);
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}
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static inline void Recv(volatile u8* data, u8 count)
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{
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while (count--)
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*data++ = UEDATX;
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RXLED1; // light the RX LED
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RxLEDPulse = TX_RX_LED_PULSE_MS;
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}
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static inline u8 Recv8()
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{
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RXLED1; // light the RX LED
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RxLEDPulse = TX_RX_LED_PULSE_MS;
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return UEDATX;
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}
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static inline void Send8(u8 d)
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{
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UEDATX = d;
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}
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static inline void SetEP(u8 ep)
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{
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UENUM = ep;
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}
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static inline u8 FifoByteCount()
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{
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return UEBCLX;
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}
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static inline u8 ReceivedSetupInt()
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{
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return UEINTX & (1<<RXSTPI);
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}
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static inline void ClearSetupInt()
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{
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UEINTX = ~((1<<RXSTPI) | (1<<RXOUTI) | (1<<TXINI));
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}
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static inline void Stall()
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{
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UECONX = (1<<STALLRQ) | (1<<EPEN);
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}
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static inline u8 ReadWriteAllowed()
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{
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return UEINTX & (1<<RWAL);
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}
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static inline u8 Stalled()
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{
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return UEINTX & (1<<STALLEDI);
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}
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static inline u8 FifoFree()
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{
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return UEINTX & (1<<FIFOCON);
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}
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static inline void ReleaseRX()
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{
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UEINTX = 0x6B; // FIFOCON=0 NAKINI=1 RWAL=1 NAKOUTI=0 RXSTPI=1 RXOUTI=0 STALLEDI=1 TXINI=1
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}
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static inline void ReleaseTX()
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{
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UEINTX = 0x3A; // FIFOCON=0 NAKINI=0 RWAL=1 NAKOUTI=1 RXSTPI=1 RXOUTI=0 STALLEDI=1 TXINI=0
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}
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static inline u8 FrameNumber()
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{
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return UDFNUML;
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}
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//==================================================================
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//==================================================================
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u8 USBGetConfiguration(void)
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{
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return _usbConfiguration;
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}
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#define USB_RECV_TIMEOUT
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class LockEP
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{
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u8 _sreg;
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public:
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LockEP(u8 ep) : _sreg(SREG)
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{
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cli();
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SetEP(ep & 7);
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}
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~LockEP()
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{
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SREG = _sreg;
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}
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};
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// Number of bytes, assumes a rx endpoint
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u8 USB_Available(u8 ep)
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{
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LockEP lock(ep);
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return FifoByteCount();
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}
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// Non Blocking receive
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// Return number of bytes read
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int USB_Recv(u8 ep, void* d, int len)
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{
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if (!_usbConfiguration || len < 0)
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return -1;
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LockEP lock(ep);
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u8 n = FifoByteCount();
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len = min(n,len);
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n = len;
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u8* dst = (u8*)d;
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while (n--)
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*dst++ = Recv8();
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if (len && !FifoByteCount()) // release empty buffer
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ReleaseRX();
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return len;
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}
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// Recv 1 byte if ready
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int USB_Recv(u8 ep)
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{
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u8 c;
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if (USB_Recv(ep,&c,1) != 1)
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return -1;
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return c;
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}
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// Space in send EP
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u8 USB_SendSpace(u8 ep)
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{
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LockEP lock(ep);
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if (!ReadWriteAllowed())
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return 0;
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return USB_EP_SIZE - FifoByteCount();
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}
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// Blocking Send of data to an endpoint
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int USB_Send(u8 ep, const void* d, int len)
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{
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if (!_usbConfiguration)
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return -1;
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if (_usbSuspendState & (1<<SUSPI)) {
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//send a remote wakeup
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UDCON |= (1 << RMWKUP);
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}
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int r = len;
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const u8* data = (const u8*)d;
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u8 timeout = 250; // 250ms timeout on send? TODO
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bool sendZlp = false;
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while (len || sendZlp)
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{
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u8 n = USB_SendSpace(ep);
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if (n == 0)
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{
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if (!(--timeout))
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return -1;
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delay(1);
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continue;
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}
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if (n > len) {
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n = len;
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}
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{
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LockEP lock(ep);
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// Frame may have been released by the SOF interrupt handler
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if (!ReadWriteAllowed())
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continue;
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len -= n;
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if (ep & TRANSFER_ZERO)
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{
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while (n--)
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Send8(0);
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}
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else if (ep & TRANSFER_PGM)
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{
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while (n--)
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Send8(pgm_read_byte(data++));
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}
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else
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{
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while (n--)
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Send8(*data++);
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}
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if (sendZlp) {
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ReleaseTX();
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sendZlp = false;
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} else if (!ReadWriteAllowed()) { // ...release if buffer is full...
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ReleaseTX();
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if (len == 0) sendZlp = true;
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} else if ((len == 0) && (ep & TRANSFER_RELEASE)) { // ...or if forced with TRANSFER_RELEASE
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// XXX: TRANSFER_RELEASE is never used can be removed?
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ReleaseTX();
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}
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}
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}
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TXLED1; // light the TX LED
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TxLEDPulse = TX_RX_LED_PULSE_MS;
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return r;
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}
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u8 _initEndpoints[USB_ENDPOINTS] =
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{
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0, // Control Endpoint
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EP_TYPE_INTERRUPT_IN, // CDC_ENDPOINT_ACM
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EP_TYPE_BULK_OUT, // CDC_ENDPOINT_OUT
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EP_TYPE_BULK_IN, // CDC_ENDPOINT_IN
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// Following endpoints are automatically initialized to 0
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};
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#define EP_SINGLE_64 0x32 // EP0
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#define EP_DOUBLE_64 0x36 // Other endpoints
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#define EP_SINGLE_16 0x12
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static
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void InitEP(u8 index, u8 type, u8 size)
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{
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UENUM = index;
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UECONX = (1<<EPEN);
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UECFG0X = type;
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UECFG1X = size;
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}
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static
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void InitEndpoints()
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{
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for (u8 i = 1; i < sizeof(_initEndpoints) && _initEndpoints[i] != 0; i++)
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{
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UENUM = i;
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UECONX = (1<<EPEN);
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UECFG0X = _initEndpoints[i];
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#if USB_EP_SIZE == 16
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UECFG1X = EP_SINGLE_16;
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#elif USB_EP_SIZE == 64
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UECFG1X = EP_DOUBLE_64;
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#else
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#error Unsupported value for USB_EP_SIZE
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#endif
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}
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UERST = 0x7E; // And reset them
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UERST = 0;
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}
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// Handle CLASS_INTERFACE requests
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static
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bool ClassInterfaceRequest(USBSetup& setup)
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{
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u8 i = setup.wIndex;
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if (CDC_ACM_INTERFACE == i)
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return CDC_Setup(setup);
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#ifdef PLUGGABLE_USB_ENABLED
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return PluggableUSB().setup(setup);
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#endif
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return false;
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}
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static int _cmark;
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static int _cend;
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void InitControl(int end)
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{
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SetEP(0);
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_cmark = 0;
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_cend = end;
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}
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static
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bool SendControl(u8 d)
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{
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if (_cmark < _cend)
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{
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if (!WaitForINOrOUT())
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return false;
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Send8(d);
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if (!((_cmark + 1) & 0x3F))
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ClearIN(); // Fifo is full, release this packet
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}
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_cmark++;
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return true;
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}
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// Clipped by _cmark/_cend
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int USB_SendControl(u8 flags, const void* d, int len)
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{
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int sent = len;
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const u8* data = (const u8*)d;
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bool pgm = flags & TRANSFER_PGM;
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while (len--)
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{
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u8 c = pgm ? pgm_read_byte(data++) : *data++;
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if (!SendControl(c))
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return -1;
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}
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return sent;
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}
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// Send a USB descriptor string. The string is stored in PROGMEM as a
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// plain ASCII string but is sent out as UTF-16 with the correct 2-byte
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// prefix
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static bool USB_SendStringDescriptor(const u8*string_P, u8 string_len, uint8_t flags) {
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SendControl(2 + string_len * 2);
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SendControl(3);
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bool pgm = flags & TRANSFER_PGM;
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for(u8 i = 0; i < string_len; i++) {
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bool r = SendControl(pgm ? pgm_read_byte(&string_P[i]) : string_P[i]);
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r &= SendControl(0); // high byte
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if(!r) {
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return false;
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}
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}
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return true;
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}
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// Does not timeout or cross fifo boundaries
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int USB_RecvControl(void* d, int len)
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{
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auto length = len;
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while(length)
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{
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// Dont receive more than the USB Control EP has to offer
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// Use fixed 64 because control EP always have 64 bytes even on 16u2.
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auto recvLength = length;
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if(recvLength > 64){
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recvLength = 64;
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}
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// Write data to fit to the end (not the beginning) of the array
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WaitOUT();
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Recv((u8*)d + len - length, recvLength);
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ClearOUT();
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length -= recvLength;
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}
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return len;
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}
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static u8 SendInterfaces()
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{
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u8 interfaces = 0;
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CDC_GetInterface(&interfaces);
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#ifdef PLUGGABLE_USB_ENABLED
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PluggableUSB().getInterface(&interfaces);
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#endif
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return interfaces;
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}
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// Construct a dynamic configuration descriptor
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// This really needs dynamic endpoint allocation etc
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// TODO
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static
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bool SendConfiguration(int maxlen)
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{
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// Count and measure interfaces
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InitControl(0);
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u8 interfaces = SendInterfaces();
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ConfigDescriptor config = D_CONFIG(_cmark + sizeof(ConfigDescriptor),interfaces);
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// Now send them
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InitControl(maxlen);
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USB_SendControl(0,&config,sizeof(ConfigDescriptor));
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SendInterfaces();
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return true;
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}
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static
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bool SendDescriptor(USBSetup& setup)
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{
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int ret;
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u8 t = setup.wValueH;
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if (USB_CONFIGURATION_DESCRIPTOR_TYPE == t)
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return SendConfiguration(setup.wLength);
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InitControl(setup.wLength);
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#ifdef PLUGGABLE_USB_ENABLED
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ret = PluggableUSB().getDescriptor(setup);
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if (ret != 0) {
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return (ret > 0 ? true : false);
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}
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#endif
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const u8* desc_addr = 0;
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if (USB_DEVICE_DESCRIPTOR_TYPE == t)
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{
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desc_addr = (const u8*)&USB_DeviceDescriptorIAD;
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}
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else if (USB_STRING_DESCRIPTOR_TYPE == t)
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{
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if (setup.wValueL == 0) {
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desc_addr = (const u8*)&STRING_LANGUAGE;
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}
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else if (setup.wValueL == IPRODUCT) {
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return USB_SendStringDescriptor(STRING_PRODUCT, strlen(USB_PRODUCT), TRANSFER_PGM);
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}
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else if (setup.wValueL == IMANUFACTURER) {
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return USB_SendStringDescriptor(STRING_MANUFACTURER, strlen(USB_MANUFACTURER), TRANSFER_PGM);
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}
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else if (setup.wValueL == ISERIAL) {
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#ifdef PLUGGABLE_USB_ENABLED
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char name[ISERIAL_MAX_LEN];
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PluggableUSB().getShortName(name);
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return USB_SendStringDescriptor((uint8_t*)name, strlen(name), 0);
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#endif
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}
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else
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return false;
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}
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if (desc_addr == 0)
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return false;
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u8 desc_length = pgm_read_byte(desc_addr);
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USB_SendControl(TRANSFER_PGM,desc_addr,desc_length);
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return true;
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}
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// Endpoint 0 interrupt
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ISR(USB_COM_vect)
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{
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SetEP(0);
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if (!ReceivedSetupInt())
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return;
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USBSetup setup;
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Recv((u8*)&setup,8);
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ClearSetupInt();
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u8 requestType = setup.bmRequestType;
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if (requestType & REQUEST_DEVICETOHOST)
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WaitIN();
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else
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ClearIN();
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bool ok = true;
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if (REQUEST_STANDARD == (requestType & REQUEST_TYPE))
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{
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// Standard Requests
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u8 r = setup.bRequest;
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u16 wValue = setup.wValueL | (setup.wValueH << 8);
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if (GET_STATUS == r)
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{
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if (requestType == (REQUEST_DEVICETOHOST | REQUEST_STANDARD | REQUEST_DEVICE))
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{
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Send8(_usbCurrentStatus);
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Send8(0);
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}
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else
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{
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// TODO: handle the HALT state of an endpoint here
|
|
// see "Figure 9-6. Information Returned by a GetStatus() Request to an Endpoint" in usb_20.pdf for more information
|
|
Send8(0);
|
|
Send8(0);
|
|
}
|
|
}
|
|
else if (CLEAR_FEATURE == r)
|
|
{
|
|
if((requestType == (REQUEST_HOSTTODEVICE | REQUEST_STANDARD | REQUEST_DEVICE))
|
|
&& (wValue == DEVICE_REMOTE_WAKEUP))
|
|
{
|
|
_usbCurrentStatus &= ~FEATURE_REMOTE_WAKEUP_ENABLED;
|
|
}
|
|
}
|
|
else if (SET_FEATURE == r)
|
|
{
|
|
if((requestType == (REQUEST_HOSTTODEVICE | REQUEST_STANDARD | REQUEST_DEVICE))
|
|
&& (wValue == DEVICE_REMOTE_WAKEUP))
|
|
{
|
|
_usbCurrentStatus |= FEATURE_REMOTE_WAKEUP_ENABLED;
|
|
}
|
|
}
|
|
else if (SET_ADDRESS == r)
|
|
{
|
|
WaitIN();
|
|
UDADDR = setup.wValueL | (1<<ADDEN);
|
|
}
|
|
else if (GET_DESCRIPTOR == r)
|
|
{
|
|
ok = SendDescriptor(setup);
|
|
}
|
|
else if (SET_DESCRIPTOR == r)
|
|
{
|
|
ok = false;
|
|
}
|
|
else if (GET_CONFIGURATION == r)
|
|
{
|
|
Send8(1);
|
|
}
|
|
else if (SET_CONFIGURATION == r)
|
|
{
|
|
if (REQUEST_DEVICE == (requestType & REQUEST_RECIPIENT))
|
|
{
|
|
InitEndpoints();
|
|
_usbConfiguration = setup.wValueL;
|
|
} else
|
|
ok = false;
|
|
}
|
|
else if (GET_INTERFACE == r)
|
|
{
|
|
}
|
|
else if (SET_INTERFACE == r)
|
|
{
|
|
}
|
|
}
|
|
else
|
|
{
|
|
InitControl(setup.wLength); // Max length of transfer
|
|
ok = ClassInterfaceRequest(setup);
|
|
}
|
|
|
|
if (ok)
|
|
ClearIN();
|
|
else
|
|
{
|
|
Stall();
|
|
}
|
|
}
|
|
|
|
void USB_Flush(u8 ep)
|
|
{
|
|
SetEP(ep);
|
|
if (FifoByteCount())
|
|
ReleaseTX();
|
|
}
|
|
|
|
static inline void USB_ClockDisable()
|
|
{
|
|
#if defined(OTGPADE)
|
|
USBCON = (USBCON & ~(1<<OTGPADE)) | (1<<FRZCLK); // freeze clock and disable VBUS Pad
|
|
#else // u2 Series
|
|
USBCON = (1 << FRZCLK); // freeze clock
|
|
#endif
|
|
PLLCSR &= ~(1<<PLLE); // stop PLL
|
|
}
|
|
|
|
static inline void USB_ClockEnable()
|
|
{
|
|
#if defined(UHWCON)
|
|
UHWCON |= (1<<UVREGE); // power internal reg
|
|
#endif
|
|
USBCON = (1<<USBE) | (1<<FRZCLK); // clock frozen, usb enabled
|
|
|
|
// ATmega32U4
|
|
#if defined(PINDIV)
|
|
#if F_CPU == 16000000UL
|
|
PLLCSR |= (1<<PINDIV); // Need 16 MHz xtal
|
|
#elif F_CPU == 8000000UL
|
|
PLLCSR &= ~(1<<PINDIV); // Need 8 MHz xtal
|
|
#else
|
|
#error "Clock rate of F_CPU not supported"
|
|
#endif
|
|
|
|
#elif defined(__AVR_AT90USB82__) || defined(__AVR_AT90USB162__) || defined(__AVR_ATmega32U2__) || defined(__AVR_ATmega16U2__) || defined(__AVR_ATmega8U2__)
|
|
// for the u2 Series the datasheet is confusing. On page 40 its called PINDIV and on page 290 its called PLLP0
|
|
#if F_CPU == 16000000UL
|
|
// Need 16 MHz xtal
|
|
PLLCSR |= (1 << PLLP0);
|
|
#elif F_CPU == 8000000UL
|
|
// Need 8 MHz xtal
|
|
PLLCSR &= ~(1 << PLLP0);
|
|
#endif
|
|
|
|
// AT90USB646, AT90USB647, AT90USB1286, AT90USB1287
|
|
#elif defined(PLLP2)
|
|
#if F_CPU == 16000000UL
|
|
#if defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB1287__)
|
|
// For Atmel AT90USB128x only. Do not use with Atmel AT90USB64x.
|
|
PLLCSR = (PLLCSR & ~(1<<PLLP1)) | ((1<<PLLP2) | (1<<PLLP0)); // Need 16 MHz xtal
|
|
#elif defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB647__)
|
|
// For AT90USB64x only. Do not use with AT90USB128x.
|
|
PLLCSR = (PLLCSR & ~(1<<PLLP0)) | ((1<<PLLP2) | (1<<PLLP1)); // Need 16 MHz xtal
|
|
#else
|
|
#error "USB Chip not supported, please defined method of USB PLL initialization"
|
|
#endif
|
|
#elif F_CPU == 8000000UL
|
|
// for Atmel AT90USB128x and AT90USB64x
|
|
PLLCSR = (PLLCSR & ~(1<<PLLP2)) | ((1<<PLLP1) | (1<<PLLP0)); // Need 8 MHz xtal
|
|
#else
|
|
#error "Clock rate of F_CPU not supported"
|
|
#endif
|
|
#else
|
|
#error "USB Chip not supported, please defined method of USB PLL initialization"
|
|
#endif
|
|
|
|
PLLCSR |= (1<<PLLE);
|
|
while (!(PLLCSR & (1<<PLOCK))) // wait for lock pll
|
|
{
|
|
}
|
|
|
|
// Some tests on specific versions of macosx (10.7.3), reported some
|
|
// strange behaviors when the board is reset using the serial
|
|
// port touch at 1200 bps. This delay fixes this behavior.
|
|
delay(1);
|
|
#if defined(OTGPADE)
|
|
USBCON = (USBCON & ~(1<<FRZCLK)) | (1<<OTGPADE); // start USB clock, enable VBUS Pad
|
|
#else
|
|
USBCON &= ~(1 << FRZCLK); // start USB clock
|
|
#endif
|
|
|
|
#if defined(RSTCPU)
|
|
#if defined(LSM)
|
|
UDCON &= ~((1<<RSTCPU) | (1<<LSM) | (1<<RMWKUP) | (1<<DETACH)); // enable attach resistor, set full speed mode
|
|
#else // u2 Series
|
|
UDCON &= ~((1 << RSTCPU) | (1 << RMWKUP) | (1 << DETACH)); // enable attach resistor, set full speed mode
|
|
#endif
|
|
#else
|
|
// AT90USB64x and AT90USB128x don't have RSTCPU
|
|
UDCON &= ~((1<<LSM) | (1<<RMWKUP) | (1<<DETACH)); // enable attach resistor, set full speed mode
|
|
#endif
|
|
}
|
|
|
|
// General interrupt
|
|
ISR(USB_GEN_vect)
|
|
{
|
|
u8 udint = UDINT;
|
|
UDINT &= ~((1<<EORSTI) | (1<<SOFI)); // clear the IRQ flags for the IRQs which are handled here, except WAKEUPI and SUSPI (see below)
|
|
|
|
// End of Reset
|
|
if (udint & (1<<EORSTI))
|
|
{
|
|
InitEP(0,EP_TYPE_CONTROL,EP_SINGLE_64); // init ep0
|
|
_usbConfiguration = 0; // not configured yet
|
|
UEIENX = 1 << RXSTPE; // Enable interrupts for ep0
|
|
}
|
|
|
|
// Start of Frame - happens every millisecond so we use it for TX and RX LED one-shot timing, too
|
|
if (udint & (1<<SOFI))
|
|
{
|
|
USB_Flush(CDC_TX); // Send a tx frame if found
|
|
|
|
// check whether the one-shot period has elapsed. if so, turn off the LED
|
|
if (TxLEDPulse && !(--TxLEDPulse))
|
|
TXLED0;
|
|
if (RxLEDPulse && !(--RxLEDPulse))
|
|
RXLED0;
|
|
}
|
|
|
|
// the WAKEUPI interrupt is triggered as soon as there are non-idle patterns on the data
|
|
// lines. Thus, the WAKEUPI interrupt can occur even if the controller is not in the "suspend" mode.
|
|
// Therefore the we enable it only when USB is suspended
|
|
if (udint & (1<<WAKEUPI))
|
|
{
|
|
UDIEN = (UDIEN & ~(1<<WAKEUPE)) | (1<<SUSPE); // Disable interrupts for WAKEUP and enable interrupts for SUSPEND
|
|
|
|
//TODO
|
|
// WAKEUPI shall be cleared by software (USB clock inputs must be enabled before).
|
|
//USB_ClockEnable();
|
|
UDINT &= ~(1<<WAKEUPI);
|
|
_usbSuspendState = (_usbSuspendState & ~(1<<SUSPI)) | (1<<WAKEUPI);
|
|
}
|
|
else if (udint & (1<<SUSPI)) // only one of the WAKEUPI / SUSPI bits can be active at time
|
|
{
|
|
UDIEN = (UDIEN & ~(1<<SUSPE)) | (1<<WAKEUPE); // Disable interrupts for SUSPEND and enable interrupts for WAKEUP
|
|
|
|
//TODO
|
|
//USB_ClockDisable();
|
|
|
|
UDINT &= ~((1<<WAKEUPI) | (1<<SUSPI)); // clear any already pending WAKEUP IRQs and the SUSPI request
|
|
_usbSuspendState = (_usbSuspendState & ~(1<<WAKEUPI)) | (1<<SUSPI);
|
|
}
|
|
}
|
|
|
|
// VBUS or counting frames
|
|
// Any frame counting?
|
|
u8 USBConnected()
|
|
{
|
|
u8 f = UDFNUML;
|
|
delay(3);
|
|
return f != UDFNUML;
|
|
}
|
|
|
|
//=======================================================================
|
|
//=======================================================================
|
|
|
|
USBDevice_ USBDevice;
|
|
|
|
USBDevice_::USBDevice_()
|
|
{
|
|
}
|
|
|
|
void USBDevice_::attach()
|
|
{
|
|
_usbConfiguration = 0;
|
|
_usbCurrentStatus = 0;
|
|
_usbSuspendState = 0;
|
|
USB_ClockEnable();
|
|
|
|
UDINT &= ~((1<<WAKEUPI) | (1<<SUSPI)); // clear already pending WAKEUP / SUSPEND requests
|
|
UDIEN = (1<<EORSTE) | (1<<SOFE) | (1<<SUSPE); // Enable interrupts for EOR (End of Reset), SOF (start of frame) and SUSPEND
|
|
|
|
TX_RX_LED_INIT;
|
|
}
|
|
|
|
void USBDevice_::detach()
|
|
{
|
|
}
|
|
|
|
// Check for interrupts
|
|
// TODO: VBUS detection
|
|
bool USBDevice_::configured()
|
|
{
|
|
return _usbConfiguration;
|
|
}
|
|
|
|
void USBDevice_::poll()
|
|
{
|
|
}
|
|
|
|
bool USBDevice_::wakeupHost()
|
|
{
|
|
// clear any previous wakeup request which might have been set but could be processed at that time
|
|
// e.g. because the host was not suspended at that time
|
|
UDCON &= ~(1 << RMWKUP);
|
|
|
|
if(!(UDCON & (1 << RMWKUP))
|
|
&& (_usbSuspendState & (1<<SUSPI))
|
|
&& (_usbCurrentStatus & FEATURE_REMOTE_WAKEUP_ENABLED))
|
|
{
|
|
// This short version will only work, when the device has not been suspended. Currently the
|
|
// Arduino core doesn't handle SUSPEND at all, so this is ok.
|
|
USB_ClockEnable();
|
|
UDCON |= (1 << RMWKUP); // send the wakeup request
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
#endif /* if defined(USBCON) */
|