aboutsummaryrefslogtreecommitdiff
path: root/cores/xinput/USBCore.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'cores/xinput/USBCore.cpp')
-rw-r--r--cores/xinput/USBCore.cpp834
1 files changed, 834 insertions, 0 deletions
diff --git a/cores/xinput/USBCore.cpp b/cores/xinput/USBCore.cpp
new file mode 100644
index 0000000..b384984
--- /dev/null
+++ b/cores/xinput/USBCore.cpp
@@ -0,0 +1,834 @@
+
+
+/* Copyright (c) 2010, Peter Barrett
+** Sleep/Wakeup support added by Michael Dreher
+**
+** Permission to use, copy, modify, and/or distribute this software for
+** any purpose with or without fee is hereby granted, provided that the
+** above copyright notice and this permission notice appear in all copies.
+**
+** THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
+** WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
+** WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR
+** BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES
+** OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+** WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+** ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+** SOFTWARE.
+*/
+
+#include "USBAPI.h"
+#include "PluggableUSB.h"
+#include <stdlib.h>
+
+#if defined(USBCON)
+
+/** Pulse generation counters to keep track of the number of milliseconds remaining for each pulse type */
+#define TX_RX_LED_PULSE_MS 100
+volatile u8 TxLEDPulse; /**< Milliseconds remaining for data Tx LED pulse */
+volatile u8 RxLEDPulse; /**< Milliseconds remaining for data Rx LED pulse */
+
+//==================================================================
+//==================================================================
+
+extern const u16 STRING_LANGUAGE[] PROGMEM;
+extern const u8 STRING_PRODUCT[] PROGMEM;
+extern const u8 STRING_MANUFACTURER[] PROGMEM;
+
+const u16 STRING_LANGUAGE[2] = {
+ (3<<8) | (2+2),
+ 0x0409 // English
+};
+
+#ifndef USB_PRODUCT
+// If no product is provided, use USB IO Board
+#define USB_PRODUCT "USB IO Board"
+#endif
+
+const u8 STRING_PRODUCT[] PROGMEM = USB_PRODUCT;
+
+#if USB_VID == 0x2341
+# if defined(USB_MANUFACTURER)
+# undef USB_MANUFACTURER
+# endif
+# define USB_MANUFACTURER "Arduino LLC"
+#elif USB_VID == 0x1b4f
+# if defined(USB_MANUFACTURER)
+# undef USB_MANUFACTURER
+# endif
+# define USB_MANUFACTURER "SparkFun"
+#elif !defined(USB_MANUFACTURER)
+// Fall through to unknown if no manufacturer name was provided in a macro
+# define USB_MANUFACTURER "Unknown"
+#endif
+
+const u8 STRING_MANUFACTURER[] PROGMEM = USB_MANUFACTURER;
+
+//==================================================================
+//==================================================================
+
+volatile u8 _usbConfiguration = 0;
+volatile u8 _usbCurrentStatus = 0; // meaning of bits see usb_20.pdf, Figure 9-4. Information Returned by a GetStatus() Request to a Device
+volatile u8 _usbSuspendState = 0; // copy of UDINT to check SUSPI and WAKEUPI bits
+
+static inline void WaitIN(void)
+{
+ while (!(UEINTX & (1<<TXINI)))
+ ;
+}
+
+static inline void ClearIN(void)
+{
+ UEINTX = ~(1<<TXINI);
+}
+
+static inline void WaitOUT(void)
+{
+ while (!(UEINTX & (1<<RXOUTI)))
+ ;
+}
+
+static inline u8 WaitForINOrOUT()
+{
+ while (!(UEINTX & ((1<<TXINI)|(1<<RXOUTI))))
+ ;
+ return (UEINTX & (1<<RXOUTI)) == 0;
+}
+
+static inline void ClearOUT(void)
+{
+ UEINTX = ~(1<<RXOUTI);
+}
+
+static inline void Recv(volatile u8* data, u8 count)
+{
+ while (count--)
+ *data++ = UEDATX;
+
+ RXLED1; // light the RX LED
+ RxLEDPulse = TX_RX_LED_PULSE_MS;
+}
+
+static inline u8 Recv8()
+{
+ RXLED1; // light the RX LED
+ RxLEDPulse = TX_RX_LED_PULSE_MS;
+
+ return UEDATX;
+}
+
+static inline void Send8(u8 d)
+{
+ UEDATX = d;
+}
+
+static inline void SetEP(u8 ep)
+{
+ UENUM = ep;
+}
+
+static inline u8 FifoByteCount()
+{
+ return UEBCLX;
+}
+
+static inline u8 ReceivedSetupInt()
+{
+ return UEINTX & (1<<RXSTPI);
+}
+
+static inline void ClearSetupInt()
+{
+ UEINTX = ~((1<<RXSTPI) | (1<<RXOUTI) | (1<<TXINI));
+}
+
+static inline void Stall()
+{
+ UECONX = (1<<STALLRQ) | (1<<EPEN);
+}
+
+static inline u8 ReadWriteAllowed()
+{
+ return UEINTX & (1<<RWAL);
+}
+
+static inline u8 Stalled()
+{
+ return UEINTX & (1<<STALLEDI);
+}
+
+static inline u8 FifoFree()
+{
+ return UEINTX & (1<<FIFOCON);
+}
+
+static inline void ReleaseRX()
+{
+ UEINTX = 0x6B; // FIFOCON=0 NAKINI=1 RWAL=1 NAKOUTI=0 RXSTPI=1 RXOUTI=0 STALLEDI=1 TXINI=1
+}
+
+static inline void ReleaseTX()
+{
+ UEINTX = 0x3A; // FIFOCON=0 NAKINI=0 RWAL=1 NAKOUTI=1 RXSTPI=1 RXOUTI=0 STALLEDI=1 TXINI=0
+}
+
+static inline u8 FrameNumber()
+{
+ return UDFNUML;
+}
+
+//==================================================================
+//==================================================================
+
+u8 USBGetConfiguration(void)
+{
+ return _usbConfiguration;
+}
+
+#define USB_RECV_TIMEOUT
+class LockEP
+{
+ u8 _sreg;
+public:
+ LockEP(u8 ep) : _sreg(SREG)
+ {
+ cli();
+ SetEP(ep & 7);
+ }
+ ~LockEP()
+ {
+ SREG = _sreg;
+ }
+};
+
+// Number of bytes, assumes a rx endpoint
+u8 USB_Available(u8 ep)
+{
+ LockEP lock(ep);
+ return FifoByteCount();
+}
+
+// Non Blocking receive
+// Return number of bytes read
+int USB_Recv(u8 ep, void* d, int len)
+{
+ if (!_usbConfiguration || len < 0)
+ return -1;
+
+ LockEP lock(ep);
+ u8 n = FifoByteCount();
+ len = min(n,len);
+ n = len;
+ u8* dst = (u8*)d;
+ while (n--)
+ *dst++ = Recv8();
+ if (len && !FifoByteCount()) // release empty buffer
+ ReleaseRX();
+
+ return len;
+}
+
+// Recv 1 byte if ready
+int USB_Recv(u8 ep)
+{
+ u8 c;
+ if (USB_Recv(ep,&c,1) != 1)
+ return -1;
+ return c;
+}
+
+// Space in send EP
+u8 USB_SendSpace(u8 ep)
+{
+ LockEP lock(ep);
+ if (!ReadWriteAllowed())
+ return 0;
+ return USB_EP_SIZE - FifoByteCount();
+}
+
+// Blocking Send of data to an endpoint
+int USB_Send(u8 ep, const void* d, int len)
+{
+ if (!_usbConfiguration)
+ return -1;
+
+ if (_usbSuspendState & (1<<SUSPI)) {
+ //send a remote wakeup
+ UDCON |= (1 << RMWKUP);
+ }
+
+ int r = len;
+ const u8* data = (const u8*)d;
+ u8 timeout = 250; // 250ms timeout on send? TODO
+ bool sendZlp = false;
+
+ while (len || sendZlp)
+ {
+ u8 n = USB_SendSpace(ep);
+ if (n == 0)
+ {
+ if (!(--timeout))
+ return -1;
+ delay(1);
+ continue;
+ }
+
+ if (n > len) {
+ n = len;
+ }
+
+ {
+ LockEP lock(ep);
+ // Frame may have been released by the SOF interrupt handler
+ if (!ReadWriteAllowed())
+ continue;
+
+ len -= n;
+ if (ep & TRANSFER_ZERO)
+ {
+ while (n--)
+ Send8(0);
+ }
+ else if (ep & TRANSFER_PGM)
+ {
+ while (n--)
+ Send8(pgm_read_byte(data++));
+ }
+ else
+ {
+ while (n--)
+ Send8(*data++);
+ }
+
+ if (sendZlp) {
+ ReleaseTX();
+ sendZlp = false;
+ } else if (!ReadWriteAllowed()) { // ...release if buffer is full...
+ ReleaseTX();
+ if (len == 0) sendZlp = true;
+ } else if ((len == 0) && (ep & TRANSFER_RELEASE)) { // ...or if forced with TRANSFER_RELEASE
+ // XXX: TRANSFER_RELEASE is never used can be removed?
+ ReleaseTX();
+ }
+ }
+ }
+ TXLED1; // light the TX LED
+ TxLEDPulse = TX_RX_LED_PULSE_MS;
+ return r;
+}
+
+#define EP_SINGLE_64 0x32 // EP0
+#define EP_DOUBLE_64 0x36 // Other endpoints
+#define EP_SINGLE_16 0x12
+
+static inline
+u8 BankSizeMask(const uint8_t nbytes)
+{
+ uint8_t mask = 0;
+ for (uint8_t size = 8; size < 64; size <<= 1) {
+ if (nbytes <= size) break;
+ mask++;
+ }
+
+ return (mask << EPSIZE0);
+}
+
+static inline
+void InitEP(u8 index, u8 type, u8 size)
+{
+ UENUM = index; // Select endpoint
+ UECONX = (1<<EPEN); // Enable endpoint
+ UECFG0X = type; // Direction and transmission type
+ UECFG1X = size; // Memory allocation, # of data banks, and bank size
+}
+
+static inline
+bool InitEPSize(const u8 index, const u8 type, const u8 nbanks, const u8 banksize)
+{
+ if (index >= USB_ENDPOINTS) return false;
+ uint8_t size = ((1 << ALLOC) | ((nbanks > 1) ? (1 << EPBK0) : 0) | BankSizeMask(banksize));
+ InitEP(index, type, size);
+ return UESTA0X & (1 << CFGOK); // Success
+}
+
+static
+void InitEndpoints()
+{
+ InitEPSize(XINPUT_TX_ENDPOINT, EP_TYPE_INTERRUPT_IN, 1, 32); // Control Data Send
+ InitEPSize(XINPUT_RX_ENDPOINT, EP_TYPE_INTERRUPT_OUT, 2, 32); // Control Data Receive
+ InitEPSize(5, EP_TYPE_INTERRUPT_IN, 1, 32); // Expansion Interface NACK (avoid config reset)
+
+ UERST = 0x7E; // Reset endpoints
+ UERST = 0; // End reset
+
+ SetEP(XINPUT_RX_ENDPOINT); // Select XInput RX endpoint (OUT)
+ UEIENX |= (1 << RXOUTE); // Enable received "OUT" interrupt
+}
+
+static int _cmark;
+static int _cend;
+void InitControl(int end)
+{
+ SetEP(0);
+ _cmark = 0;
+ _cend = end;
+}
+
+static
+bool SendControl(u8 d)
+{
+ if (_cmark < _cend)
+ {
+ if (!WaitForINOrOUT())
+ return false;
+ Send8(d);
+ if (!((_cmark + 1) & 0x3F))
+ ClearIN(); // Fifo is full, release this packet
+ }
+ _cmark++;
+ return true;
+}
+
+// Clipped by _cmark/_cend
+int USB_SendControl(u8 flags, const void* d, int len)
+{
+ int sent = len;
+ const u8* data = (const u8*)d;
+ bool pgm = flags & TRANSFER_PGM;
+ while (len--)
+ {
+ u8 c = pgm ? pgm_read_byte(data++) : *data++;
+ if (!SendControl(c))
+ return -1;
+ }
+ return sent;
+}
+
+// Send a USB descriptor string. The string is stored in PROGMEM as a
+// plain ASCII string but is sent out as UTF-16 with the correct 2-byte
+// prefix
+static bool USB_SendStringDescriptor(const u8*string_P, u8 string_len, uint8_t flags) {
+ SendControl(2 + string_len * 2);
+ SendControl(3);
+ bool pgm = flags & TRANSFER_PGM;
+ for(u8 i = 0; i < string_len; i++) {
+ bool r = SendControl(pgm ? pgm_read_byte(&string_P[i]) : string_P[i]);
+ r &= SendControl(0); // high byte
+ if(!r) {
+ return false;
+ }
+ }
+ return true;
+}
+
+// Does not timeout or cross fifo boundaries
+int USB_RecvControl(void* d, int len)
+{
+ auto length = len;
+ while(length)
+ {
+ // Dont receive more than the USB Control EP has to offer
+ // Use fixed 64 because control EP always have 64 bytes even on 16u2.
+ auto recvLength = length;
+ if(recvLength > 64){
+ recvLength = 64;
+ }
+
+ // Write data to fit to the end (not the beginning) of the array
+ WaitOUT();
+ Recv((u8*)d + len - length, recvLength);
+ ClearOUT();
+ length -= recvLength;
+ }
+ return len;
+}
+
+// Construct a dynamic configuration descriptor
+// This really needs dynamic endpoint allocation etc
+// TODO
+static
+bool SendConfiguration(int maxlen)
+{
+ InitControl(maxlen);
+ USB_SendControl(TRANSFER_PGM, &USB_ConfigDescriptor, USB_ConfigDescriptorSize);
+ return true;
+}
+
+static
+bool SendDescriptor(USBSetup& setup)
+{
+ u8 t = setup.wValueH;
+ if (USB_CONFIGURATION_DESCRIPTOR_TYPE == t)
+ return SendConfiguration(setup.wLength);
+
+ InitControl(setup.wLength);
+#ifdef PLUGGABLE_USB_ENABLED
+ int ret = PluggableUSB().getDescriptor(setup);
+ if (ret != 0) {
+ return (ret > 0 ? true : false);
+ }
+#endif
+
+ const u8* desc_addr = 0;
+ if (USB_DEVICE_DESCRIPTOR_TYPE == t)
+ {
+ desc_addr = (const u8*) &USB_DeviceDescriptor;
+ }
+ else if (USB_STRING_DESCRIPTOR_TYPE == t)
+ {
+ if (setup.wValueL == 0) {
+ desc_addr = (const u8*)&STRING_LANGUAGE;
+ }
+ else if (setup.wValueL == IPRODUCT) {
+ return USB_SendStringDescriptor(STRING_PRODUCT, strlen(USB_PRODUCT), TRANSFER_PGM);
+ }
+ else if (setup.wValueL == IMANUFACTURER) {
+ return USB_SendStringDescriptor(STRING_MANUFACTURER, strlen(USB_MANUFACTURER), TRANSFER_PGM);
+ }
+ else if (setup.wValueL == ISERIAL) {
+#ifdef PLUGGABLE_USB_ENABLED
+ char name[ISERIAL_MAX_LEN];
+ PluggableUSB().getShortName(name);
+ return USB_SendStringDescriptor((uint8_t*)name, strlen(name), 0);
+#else
+ return USB_SendStringDescriptor(STRING_SERIAL, strlen((char*)STRING_SERIAL), TRANSFER_PGM);
+#endif
+ }
+ else if (setup.wValueL == ISECURITY) {
+ return USB_SendStringDescriptor(STRING_SECURITY, strlen((char*)STRING_SECURITY), TRANSFER_PGM);
+ }
+ else
+ return false;
+ }
+
+ if (desc_addr == 0)
+ return false;
+ u8 desc_length = pgm_read_byte(desc_addr);
+
+ USB_SendControl(TRANSFER_PGM,desc_addr,desc_length);
+ return true;
+}
+
+// Endpoint interrupt
+ISR(USB_COM_vect)
+{
+ SetEP(XINPUT_RX_ENDPOINT); // Select XInput RX endpoint (OUT)
+ if (UEINTX & (1 << RXOUTI)) { // If data received...
+ UEINTX &= ~(1 << RXOUTI); // Clear interrupt flag
+ if (XInputUSB::RecvCallback != nullptr) {
+ XInputUSB::RecvCallback(); // Call callback function if it exists
+ }
+ }
+
+ SetEP(0);
+ if (!ReceivedSetupInt())
+ return;
+
+ USBSetup setup;
+ Recv((u8*)&setup,8);
+ ClearSetupInt();
+
+ u8 requestType = setup.bmRequestType;
+ if (requestType & REQUEST_DEVICETOHOST)
+ WaitIN();
+ else
+ ClearIN();
+
+ bool ok = true;
+ if (REQUEST_STANDARD == (requestType & REQUEST_TYPE))
+ {
+ // Standard Requests
+ u8 r = setup.bRequest;
+ u16 wValue = setup.wValueL | (setup.wValueH << 8);
+ if (GET_STATUS == r)
+ {
+ if (requestType == (REQUEST_DEVICETOHOST | REQUEST_STANDARD | REQUEST_DEVICE))
+ {
+ Send8(_usbCurrentStatus);
+ Send8(0);
+ }
+ else
+ {
+ // 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
+ {
+ ok = true;
+ }
+
+ 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))
+ {
+ // 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;
+}
+
+bool USBDevice_::isSuspended()
+{
+ return (_usbSuspendState & (1 << SUSPI));
+}
+
+
+#endif /* if defined(USBCON) */
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-11-22 01:18:36 +0000