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-rw-r--r--cores/arduino/USBAPI.h1
-rw-r--r--cores/arduino/USBCore.cpp161
-rw-r--r--cores/arduino/USBCore.h11
3 files changed, 150 insertions, 23 deletions
diff --git a/cores/arduino/USBAPI.h b/cores/arduino/USBAPI.h
index d8ad98d..251e4b9 100644
--- a/cores/arduino/USBAPI.h
+++ b/cores/arduino/USBAPI.h
@@ -58,6 +58,7 @@ public:
void attach();
void detach(); // Serial port goes down too...
void poll();
+ bool wakeupHost(); // returns false, when wakeup cannot be processed
};
extern USBDevice_ USBDevice;
diff --git a/cores/arduino/USBCore.cpp b/cores/arduino/USBCore.cpp
index b0160e2..9095d79 100644
--- a/cores/arduino/USBCore.cpp
+++ b/cores/arduino/USBCore.cpp
@@ -78,6 +78,8 @@ const DeviceDescriptor USB_DeviceDescriptorB =
//==================================================================
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)
{
@@ -329,7 +331,7 @@ static
void InitEP(u8 index, u8 type, u8 size)
{
UENUM = index;
- UECONX = 1;
+ UECONX = (1<<EPEN);
UECFG0X = type;
UECFG1X = size;
}
@@ -340,7 +342,7 @@ void InitEndpoints()
for (u8 i = 1; i < sizeof(_initEndpoints) && _initEndpoints[i] != 0; i++)
{
UENUM = i;
- UECONX = 1;
+ UECONX = (1<<EPEN);
UECFG0X = _initEndpoints[i];
UECFG1X = EP_DOUBLE_64;
}
@@ -530,16 +532,37 @@ ISR(USB_COM_vect)
{
// Standard Requests
u8 r = setup.bRequest;
+ u16 wValue = setup.wValueL | (setup.wValueH << 8);
if (GET_STATUS == r)
{
- Send8(0); // TODO
- Send8(0);
+ 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)
{
@@ -595,11 +618,73 @@ void USB_Flush(u8 ep)
ReleaseTX();
}
+static inline void USB_ClockDisable()
+{
+ USBCON = (USBCON & ~(1<<OTGPADE)) | (1<<FRZCLK); // freeze clock and disable VBUS Pad
+ PLLCSR &= ~(1<<PLLE); // stop PLL
+}
+
+static inline void USB_ClockEnable()
+{
+ UHWCON |= (1<<UVREGE); // power internal reg
+ 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
+
+// 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);
+ USBCON = (USBCON & ~(1<<FRZCLK)) | (1<<OTGPADE); // start USB clock, enable VBUS Pad
+
+#if defined(RSTCPU)
+ UDCON &= ~((1<<RSTCPU) | (1<<LSM) | (1<<RMWKUP) | (1<<DETACH)); // enable attach resistor, set full speed mode
+#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 = 0;
+ 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))
@@ -620,6 +705,30 @@ ISR(USB_GEN_vect)
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
@@ -643,24 +752,12 @@ USBDevice_::USBDevice_()
void USBDevice_::attach()
{
_usbConfiguration = 0;
- UHWCON = 0x01; // power internal reg
- USBCON = (1<<USBE)|(1<<FRZCLK); // clock frozen, usb enabled
-#if F_CPU == 16000000UL
- PLLCSR = 0x12; // Need 16 MHz xtal
-#elif F_CPU == 8000000UL
- PLLCSR = 0x02; // Need 8 MHz xtal
-#endif
- while (!(PLLCSR & (1<<PLOCK))) // wait for lock pll
- ;
+ _usbCurrentStatus = 0;
+ _usbSuspendState = 0;
+ USB_ClockEnable();
- // Some tests on specific versions of macosx (10.7.3), reported some
- // strange behaviuors when the board is reset using the serial
- // port touch at 1200 bps. This delay fixes this behaviour.
- delay(1);
-
- USBCON = ((1<<USBE)|(1<<OTGPADE)); // start USB clock
- UDIEN = (1<<EORSTE)|(1<<SOFE); // Enable interrupts for EOR (End of Reset) and SOF (start of frame)
- UDCON = 0; // enable attach resistor
+ 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;
}
@@ -680,4 +777,24 @@ 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) */
diff --git a/cores/arduino/USBCore.h b/cores/arduino/USBCore.h
index cd2191c..c19d68a 100644
--- a/cores/arduino/USBCore.h
+++ b/cores/arduino/USBCore.h
@@ -81,6 +81,15 @@
#define USB_INTERFACE_DESCRIPTOR_TYPE 4
#define USB_ENDPOINT_DESCRIPTOR_TYPE 5
+// usb_20.pdf Table 9.6 Standard Feature Selectors
+#define DEVICE_REMOTE_WAKEUP 1
+#define ENDPOINT_HALT 2
+#define TEST_MODE 3
+
+// usb_20.pdf Figure 9-4. Information Returned by a GetStatus() Request to a Device
+#define FEATURE_SELFPOWERED_ENABLED (1 << 0)
+#define FEATURE_REMOTE_WAKEUP_ENABLED (1 << 1)
+
#define USB_DEVICE_CLASS_COMMUNICATIONS 0x02
#define USB_DEVICE_CLASS_HUMAN_INTERFACE 0x03
#define USB_DEVICE_CLASS_STORAGE 0x08
@@ -264,7 +273,7 @@ typedef struct
{ 18, 1, 0x200, _class,_subClass,_proto,_packetSize0,_vid,_pid,_version,_im,_ip,_is,_configs }
#define D_CONFIG(_totalLength,_interfaces) \
- { 9, 2, _totalLength,_interfaces, 1, 0, USB_CONFIG_BUS_POWERED, USB_CONFIG_POWER_MA(500) }
+ { 9, 2, _totalLength,_interfaces, 1, 0, USB_CONFIG_BUS_POWERED | USB_CONFIG_REMOTE_WAKEUP, USB_CONFIG_POWER_MA(500) }
#define D_INTERFACE(_n,_numEndpoints,_class,_subClass,_protocol) \
{ 9, 4, _n, 0, _numEndpoints, _class,_subClass, _protocol, 0 }
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-11-22 15:26:13 +0000