/* USB Serial Example for Teensy USB Development Board
* http://www.pjrc.com/teensy/usb_serial.html
* Copyright (c) 2008 PJRC.COM, LLC
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "usb_common.h"
#include "usb_private.h"
/**************************************************************************
*
* Endpoint Buffer Configuration
*
**************************************************************************/
static const uint8_t PROGMEM endpoint_config_table[] = {
1, EP_TYPE_BULK_IN, EP_SIZE(MIDI_TX_SIZE) | MIDI_TX_BUFFER,
1, EP_TYPE_BULK_OUT, EP_SIZE(MIDI_RX_SIZE) | MIDI_RX_BUFFER,
1, EP_TYPE_INTERRUPT_IN, EP_SIZE(RAWHID_TX_SIZE) | RAWHID_TX_BUFFER,
1, EP_TYPE_INTERRUPT_OUT, EP_SIZE(RAWHID_RX_SIZE) | RAWHID_RX_BUFFER,
1, EP_TYPE_INTERRUPT_IN, EP_SIZE(DEBUG_TX_SIZE) | DEBUG_TX_BUFFER,
1, EP_TYPE_INTERRUPT_OUT, EP_SIZE(DEBUG_RX_SIZE) | DEBUG_RX_BUFFER,
0
};
/**************************************************************************
*
* Descriptor Data
*
**************************************************************************/
// Descriptors are the data that your computer reads when it auto-detects
// this USB device (called "enumeration" in USB lingo). The most commonly
// changed items are editable at the top of this file. Changing things
// in here should only be done by those who've read chapter 9 of the USB
// spec and relevant portions of any USB class specifications!
static const uint8_t PROGMEM device_descriptor[] = {
18, // bLength
1, // bDescriptorType
0x00, 0x02, // bcdUSB
0, // bDeviceClass
0, // bDeviceSubClass
0, // bDeviceProtocol
ENDPOINT0_SIZE, // bMaxPacketSize0
LSB(VENDOR_ID), MSB(VENDOR_ID), // idVendor
LSB(PRODUCT_ID), MSB(PRODUCT_ID), // idProduct
0x02, 0x01, // bcdDevice
0, // iManufacturer
1, // iProduct
0, // iSerialNumber
1 // bNumConfigurations
};
static const uint8_t PROGMEM debug_hid_report_desc[] = {
0x06, 0xC9, 0xFF, // Usage Page 0xFFC9 (vendor defined)
0x09, 0x04, // Usage 0x04
0xA1, 0x5C, // Collection 0x5C
0x75, 0x08, // report size = 8 bits (global)
0x15, 0x00, // logical minimum = 0 (global)
0x26, 0xFF, 0x00, // logical maximum = 255 (global)
0x95, DEBUG_TX_SIZE, // report count (global)
0x09, 0x75, // usage (local)
0x81, 0x02, // Input
0x95, DEBUG_RX_SIZE, // report count (global)
0x09, 0x76, // usage (local)
0x91, 0x02, // Output
0x95, 0x04, // report count (global)
0x09, 0x76, // usage (local)
0xB1, 0x02, // Feature
0xC0 // end collection
};
static uint8_t PROGMEM rawhid_hid_report_desc[] = {
0x06, LSB(RAWHID_USAGE_PAGE), MSB(RAWHID_USAGE_PAGE),
0x0A, LSB(RAWHID_USAGE), MSB(RAWHID_USAGE),
0xA1, 0x01, // Collection 0x01
0x75, 0x08, // report size = 8 bits
0x15, 0x00, // logical minimum = 0
0x26, 0xFF, 0x00, // logical maximum = 255
0x95, RAWHID_TX_SIZE, // report count
0x09, 0x01, // usage
0x81, 0x02, // Input (array)
0x95, RAWHID_RX_SIZE, // report count
0x09, 0x02, // usage
0x91, 0x02, // Output (array)
0xC0 // end collection
};
#define MIDI_SIZE 74
#define RAWHID_SIZE 32
#define DEBUG_SIZE 32
// FROM RAWHID -- #define RAWHID_HID_DESC_OFFSET ( 9 + 9 )
// FROM MIDI -- #define DEBUG_HID_DESC_OFFSET ( 9 + 74 + 9 )
// In the midi core, DEBUG is the second interface, in my core rawhid is the second interface, so I assume their offset should be the same
#define RAWHID_HID_DESC_OFFSET ( 9 + MIDI_SIZE + 9 )
//#define RAWHID DEBUG_HID_DESC_OFFSET ( 9 + 9+9+7+7 + 9 )
// From this, I assume the size of the RAWHID = 9+9+7+7 = 32
#define DEBUG_HID_DESC_OFFSET ( 9 + MIDI_SIZE + RAWHID_SIZE + 9 )
//#define CONFIG1_DESC_SIZE ( 9 + 9+9+7+7 + 9+9+7+7)
//and from this I assume that the size of the debug is also 32
#define CONFIG1_DESC_SIZE ( 9 + MIDI_SIZE + RAWHID_SIZE + DEBUG_SIZE)
static const uint8_t PROGMEM config1_descriptor[CONFIG1_DESC_SIZE] = {
// configuration descriptor, USB spec 9.6.3, page 264-266, Table 9-10
9, // bLength;
2, // bDescriptorType;
LSB(CONFIG1_DESC_SIZE), // wTotalLength
MSB(CONFIG1_DESC_SIZE),
NUM_INTERFACE, // bNumInterfaces
1, // bConfigurationValue
0, // iConfiguration
0xC0, // bmAttributes
50, // bMaxPower
/// MIDI STUFF --------------------------------------
// Standard MS Interface Descriptor,
9, // bLength
4, // bDescriptorType
MIDI_INTERFACE, // bInterfaceNumber
0, // bAlternateSetting
2, // bNumEndpoints
0x01, // bInterfaceClass (0x01 = Audio)
0x03, // bInterfaceSubClass (0x03 = MIDI)
0x00, // bInterfaceProtocol (unused for MIDI)
0, // iInterface
// MIDI MS Interface Header, USB MIDI 6.1.2.1, page 21, Table 6-2
7, // bLength
0x24, // bDescriptorType = CS_INTERFACE
0x01, // bDescriptorSubtype = MS_HEADER
0x00, 0x01, // bcdMSC = revision 01.00
0x41, 0x00, // wTotalLength
// MIDI IN Jack Descriptor, B.4.3, Table B-7 (embedded), page 40
6, // bLength
0x24, // bDescriptorType = CS_INTERFACE
0x02, // bDescriptorSubtype = MIDI_IN_JACK
0x01, // bJackType = EMBEDDED
1, // bJackID, ID = 1
0, // iJack
// MIDI IN Jack Descriptor, B.4.3, Table B-8 (external), page 40
6, // bLength
0x24, // bDescriptorType = CS_INTERFACE
0x02, // bDescriptorSubtype = MIDI_IN_JACK
0x02, // bJackType = EXTERNAL
2, // bJackID, ID = 2
0, // iJack
// MIDI OUT Jack Descriptor, B.4.4, Table B-9, page 41
9,
0x24, // bDescriptorType = CS_INTERFACE
0x03, // bDescriptorSubtype = MIDI_OUT_JACK
0x01, // bJackType = EMBEDDED
3, // bJackID, ID = 3
1, // bNrInputPins = 1 pin
2, // BaSourceID(1) = 2
1, // BaSourcePin(1) = first pin
0, // iJack
// MIDI OUT Jack Descriptor, B.4.4, Table B-10, page 41
9,
0x24, // bDescriptorType = CS_INTERFACE
0x03, // bDescriptorSubtype = MIDI_OUT_JACK
0x02, // bJackType = EXTERNAL
4, // bJackID, ID = 4
1, // bNrInputPins = 1 pin
1, // BaSourceID(1) = 1
1, // BaSourcePin(1) = first pin
0, // iJack
// Standard Bulk OUT Endpoint Descriptor, B.5.1, Table B-11, pae 42
9, // bLength
5, // bDescriptorType = ENDPOINT
MIDI_RX_ENDPOINT, // bEndpointAddress
0x02, // bmAttributes (0x02=bulk)
MIDI_RX_SIZE, 0, // wMaxPacketSize
0, // bInterval
0, // bRefresh
0, // bSynchAddress
// Class-specific MS Bulk OUT Endpoint Descriptor, B.5.2, Table B-12, page 42
5, // bLength
0x25, // bDescriptorSubtype = CS_ENDPOINT
0x01, // bJackType = MS_GENERAL
1, // bNumEmbMIDIJack = 1 jack
1, // BaAssocJackID(1) = jack ID #1
// Standard Bulk IN Endpoint Descriptor, B.5.1, Table B-11, pae 42
9, // bLength
5, // bDescriptorType = ENDPOINT
MIDI_TX_ENDPOINT | 0x80, // bEndpointAddress
0x02, // bmAttributes (0x02=bulk)
MIDI_TX_SIZE, 0, // wMaxPacketSize
0, // bInterval
0, // bRefresh
0, // bSynchAddress
// Class-specific MS Bulk IN Endpoint Descriptor, B.5.2, Table B-12, page 42
5, // bLength
0x25, // bDescriptorSubtype = CS_ENDPOINT
0x01, // bJackType = MS_GENERAL
1, // bNumEmbMIDIJack = 1 jack
3, // BaAssocJackID(1) = jack ID #3
// RAW HID STUFF ------------------------------------------------------------------------
// interface descriptor, USB spec 9.6.5, page 267-269, Table 9-12
9, // bLength
4, // bDescriptorType
RAWHID_INTERFACE, // bInterfaceNumber
0, // bAlternateSetting
2, // bNumEndpoints
0x03, // bInterfaceClass (0x03 = HID)
0x00, // bInterfaceSubClass (0x01 = Boot)
0x00, // bInterfaceProtocol (0x01 = Keyboard)
2, // iInterface
// HID interface descriptor, HID 1.11 spec, section 6.2.1
9, // bLength
0x21, // bDescriptorType
0x11, 0x01, // bcdHID
0, // bCountryCode
1, // bNumDescriptors
0x22, // bDescriptorType
sizeof(rawhid_hid_report_desc), // wDescriptorLength
0,
// endpoint descriptor, USB spec 9.6.6, page 269-271, Table 9-13
7, // bLength
5, // bDescriptorType
RAWHID_TX_ENDPOINT | 0x80, // bEndpointAddress
0x03, // bmAttributes (0x03=intr)
RAWHID_TX_SIZE, 0, // wMaxPacketSize
RAWHID_TX_INTERVAL, // bInterval
// endpoint descriptor, USB spec 9.6.6, page 269-271, Table 9-13
7, // bLength
5, // bDescriptorType
RAWHID_RX_ENDPOINT, // bEndpointAddress
0x03, // bmAttributes (0x03=intr)
RAWHID_RX_SIZE, 0, // wMaxPacketSize
RAWHID_RX_INTERVAL, // bInterval
// interface descriptor, USB spec 9.6.5, page 267-269, Table 9-12
9, // bLength
4, // bDescriptorType
DEBUG_INTERFACE, // bInterfaceNumber
0, // bAlternateSetting
2, // bNumEndpoints
0x03, // bInterfaceClass (0x03 = HID)
0x00, // bInterfaceSubClass
0x00, // bInterfaceProtocol
3, // iInterface
// HID interface descriptor, HID 1.11 spec, section 6.2.1
9, // bLength
0x21, // bDescriptorType
0x11, 0x01, // bcdHID
0, // bCountryCode
1, // bNumDescriptors
0x22, // bDescriptorType
sizeof(debug_hid_report_desc), // wDescriptorLength
0,
// endpoint descriptor, USB spec 9.6.6, page 269-271, Table 9-13
7, // bLength
5, // bDescriptorType
DEBUG_TX_ENDPOINT | 0x80, // bEndpointAddress
0x03, // bmAttributes (0x03=intr)
DEBUG_TX_SIZE, 0, // wMaxPacketSize
DEBUG_TX_INTERVAL, // bInterval
// endpoint descriptor, USB spec 9.6.6, page 269-271, Table 9-13
7, // bLength
5, // bDescriptorType
DEBUG_RX_ENDPOINT, // bEndpointAddress
0x03, // bmAttributes (0x03=intr)
DEBUG_RX_SIZE, 0, // wMaxPacketSize
DEBUG_RX_INTERVAL // bInterval
};
// If you're desperate for a little extra code memory, these strings
// can be completely removed if iManufacturer, iProduct, iSerialNumber
// in the device desciptor are changed to zeros.
struct usb_string_descriptor_struct {
uint8_t bLength;
uint8_t bDescriptorType;
int16_t wString[];
};
static const struct usb_string_descriptor_struct PROGMEM string0 = {
4,
3,
{0x0409}
};
static const struct usb_string_descriptor_struct PROGMEM string1 = {
sizeof(STR_PRODUCT),
3,
STR_PRODUCT
};
static const struct usb_string_descriptor_struct PROGMEM string2 = {
sizeof(STR_RAWHID),
3,
STR_RAWHID
};
static const struct usb_string_descriptor_struct PROGMEM string3 = {
sizeof(STR_DEBUG),
3,
STR_DEBUG
};
// This table defines which descriptor data is sent for each specific
// request from the host (in wValue and wIndex).
static const struct descriptor_list_struct {
uint16_t wValue;
uint16_t wIndex;
const uint8_t *addr;
uint8_t length;
} PROGMEM descriptor_list[] = {
{0x0100, 0x0000, device_descriptor, sizeof(device_descriptor)},
{0x0200, 0x0000, config1_descriptor, sizeof(config1_descriptor)},
{0x2200, RAWHID_INTERFACE, rawhid_hid_report_desc, sizeof(rawhid_hid_report_desc)},
{0x2100, RAWHID_INTERFACE, config1_descriptor+RAWHID_HID_DESC_OFFSET, 9},
{0x2200, DEBUG_INTERFACE, debug_hid_report_desc, sizeof(debug_hid_report_desc)},
{0x2100, DEBUG_INTERFACE, config1_descriptor+DEBUG_HID_DESC_OFFSET, 9},
{0x0300, 0x0000, (const uint8_t *)&string0, 4},
{0x0301, 0x0409, (const uint8_t *)&string1, sizeof(STR_PRODUCT)},
{0x0302, 0x0409, (const uint8_t *)&string2, sizeof(STR_RAWHID)},
{0x0303, 0x0409, (const uint8_t *)&string3, sizeof(STR_DEBUG)},
};
#define NUM_DESC_LIST (sizeof(descriptor_list)/sizeof(struct descriptor_list_struct))
/**************************************************************************
*
* Variables - these are the only non-stack RAM usage
*
**************************************************************************/
// zero when we are not configured, non-zero when enumerated
volatile uint8_t usb_configuration USBSTATE;
volatile uint8_t usb_suspended USBSTATE;
// the time remaining before we transmit any partially full
// packet, or send a zero length packet.
volatile uint8_t debug_flush_timer USBSTATE;
// these are a more reliable timeout than polling the
// frame counter (UDFNUML)
volatile uint16_t rawhid_rx_timeout_count USBSTATE;
volatile uint16_t rawhid_tx_timeout_count USBSTATE;
/**************************************************************************
*
* Public Functions - these are the API intended for the user
*
**************************************************************************/
// initialize USB serial
void usb_init(void)
{
uint8_t u;
u = USBCON;
if ((u & (1<<USBE)) && !(u & (1<<FRZCLK))) return;
HW_CONFIG();
USB_FREEZE(); // enable USB
PLL_CONFIG(); // config PLL
while (!(PLLCSR & (1<<PLOCK))) ; // wait for PLL lock
USB_CONFIG(); // start USB clock
UDCON = 0; // enable attach resistor
usb_configuration = 0;
usb_suspended = 0;
debug_flush_timer = 0;
rawhid_rx_timeout_count = 0;
rawhid_tx_timeout_count = 0;
UDINT = 0;
UDIEN = (1<<EORSTE)|(1<<SOFE);
//sei(); // init() in wiring.c does this
}
void usb_shutdown(void)
{
UDIEN = 0; // disable interrupts
UDCON = 1; // disconnect attach resistor
USBCON = 0; // shut off USB periperal
PLLCSR = 0; // shut off PLL
usb_configuration = 0;
usb_suspended = 1;
}
// Public API functions moved to usb_api.cpp
/**************************************************************************
*
* Private Functions - not intended for general user consumption....
*
**************************************************************************/
// USB Device Interrupt - handle all device-level events
// the transmit buffer flushing is triggered by the start of frame
//
ISR(USB_GEN_vect)
{
uint8_t intbits, t;
intbits = UDINT;
UDINT = 0;
if (intbits & (1<<EORSTI)) {
UENUM = 0;
UECONX = 1;
UECFG0X = EP_TYPE_CONTROL;
UECFG1X = EP_SIZE(ENDPOINT0_SIZE) | EP_SINGLE_BUFFER;
UEIENX = (1<<RXSTPE);
usb_configuration = 0;
}
if ((intbits & (1<<SOFI)) && usb_configuration) {
t = debug_flush_timer;
if (t) {
debug_flush_timer = -- t;
if (!t) {
UENUM = DEBUG_TX_ENDPOINT;
while ((UEINTX & (1<<RWAL))) {
UEDATX = 0;
}
UEINTX = 0x3A;
}
}
t = rawhid_rx_timeout_count;
if (t) rawhid_rx_timeout_count = --t;
t = rawhid_tx_timeout_count;
if (t) rawhid_tx_timeout_count = --t;
}
if (intbits & (1<<SUSPI)) {
// USB Suspend (inactivity for 3ms)
UDIEN = (1<<WAKEUPE);
usb_configuration = 0;
usb_suspended = 1;
#if (F_CPU >= 8000000L)
// WAKEUPI does not work with USB clock freeze
// when CPU is running less than 8 MHz.
// Is this a hardware bug?
USB_FREEZE(); // shut off USB
PLLCSR = 0; // shut off PLL
#endif
// to properly meet the USB spec, current must
// reduce to less than 2.5 mA, which means using
// powerdown mode, but that breaks the Arduino
// user's paradigm....
}
if (usb_suspended && (intbits & (1<<WAKEUPI))) {
// USB Resume (pretty much any activity)
#if (F_CPU >= 8000000L)
PLL_CONFIG();
while (!(PLLCSR & (1<<PLOCK))) ;
USB_CONFIG();
#endif
UDIEN = (1<<EORSTE)|(1<<SOFE)|(1<<SUSPE);
usb_suspended = 0;
return;
}
}
// Misc functions to wait for ready and send/receive packets
static inline void usb_wait_in_ready(void)
{
while (!(UEINTX & (1<<TXINI))) ;
}
static inline void usb_send_in(void)
{
UEINTX = ~(1<<TXINI);
}
static inline void usb_wait_receive_out(void)
{
while (!(UEINTX & (1<<RXOUTI))) ;
}
static inline void usb_ack_out(void)
{
UEINTX = ~(1<<RXOUTI);
}
// USB Endpoint Interrupt - endpoint 0 is handled here. The
// other endpoints are manipulated by the user-callable
// functions, and the start-of-frame interrupt.
//
ISR(USB_COM_vect)
{
uint8_t intbits;
const uint8_t *list;
const uint8_t *cfg;
uint8_t i, n, len, en;
uint8_t bmRequestType;
uint8_t bRequest;
uint16_t wValue;
uint16_t wIndex;
uint16_t wLength;
uint16_t desc_val;
const uint8_t *desc_addr;
uint8_t desc_length;
UENUM = 0;
intbits = UEINTX;
if (intbits & (1<<RXSTPI)) {
bmRequestType = UEDATX;
bRequest = UEDATX;
read_word_lsbfirst(wValue, UEDATX);
read_word_lsbfirst(wIndex, UEDATX);
read_word_lsbfirst(wLength, UEDATX);
UEINTX = ~((1<<RXSTPI) | (1<<RXOUTI) | (1<<TXINI));
if (bRequest == GET_DESCRIPTOR) {
list = (const uint8_t *)descriptor_list;
for (i=0; ; i++) {
if (i >= NUM_DESC_LIST) {
UECONX = (1<<STALLRQ)|(1<<EPEN); //stall
return;
}
pgm_read_word_postinc(desc_val, list);
if (desc_val != wValue) {
list += sizeof(struct descriptor_list_struct)-2;
continue;
}
pgm_read_word_postinc(desc_val, list);
if (desc_val != wIndex) {
list += sizeof(struct descriptor_list_struct)-4;
continue;
}
pgm_read_word_postinc(desc_addr, list);
desc_length = pgm_read_byte(list);
break;
}
len = (wLength < 256) ? wLength : 255;
if (len > desc_length) len = desc_length;
list = desc_addr;
do {
// wait for host ready for IN packet
do {
i = UEINTX;
} while (!(i & ((1<<TXINI)|(1<<RXOUTI))));
if (i & (1<<RXOUTI)) return; // abort
// send IN packet
n = len < ENDPOINT0_SIZE ? len : ENDPOINT0_SIZE;
for (i = n; i; i--) {
pgm_read_byte_postinc(UEDATX, list);
}
len -= n;
usb_send_in();
} while (len || n == ENDPOINT0_SIZE);
return;
}
if (bRequest == SET_ADDRESS) {
usb_send_in();
usb_wait_in_ready();
UDADDR = wValue | (1<<ADDEN);
return;
}
if (bRequest == SET_CONFIGURATION && bmRequestType == 0) {
usb_configuration = wValue;
debug_flush_timer = 0;
usb_send_in();
cfg = endpoint_config_table;
for (i=1; i<NUM_ENDPOINTS; i++) {
UENUM = i;
pgm_read_byte_postinc(en, cfg);
UECONX = en;
if (en) {
pgm_read_byte_postinc(UECFG0X, cfg);
pgm_read_byte_postinc(UECFG1X, cfg);
}
}
UERST = 0x1E;
UERST = 0;
return;
}
if (bRequest == GET_CONFIGURATION && bmRequestType == 0x80) {
usb_wait_in_ready();
UEDATX = usb_configuration;
usb_send_in();
return;
}
if (bRequest == GET_STATUS) {
usb_wait_in_ready();
i = 0;
if (bmRequestType == 0x82) {
UENUM = wIndex;
if (UECONX & (1<<STALLRQ)) i = 1;
UENUM = 0;
}
UEDATX = i;
UEDATX = 0;
usb_send_in();
return;
}
if ((bRequest == CLEAR_FEATURE || bRequest == SET_FEATURE)
&& bmRequestType == 0x02 && wValue == 0) {
i = wIndex & 0x7F;
if (i >= 1 && i <= NUM_ENDPOINTS) {
usb_send_in();
UENUM = i;
if (bRequest == SET_FEATURE) {
UECONX = (1<<STALLRQ)|(1<<EPEN);
} else {
UECONX = (1<<STALLRQC)|(1<<RSTDT)|(1<<EPEN);
UERST = (1 << i);
UERST = 0;
}
return;
}
}
if (wIndex == RAWHID_INTERFACE) {
if (bmRequestType == 0xA1 && bRequest == HID_GET_REPORT) {
len = RAWHID_TX_SIZE;
do {
// wait for host ready for IN packet
do {
i = UEINTX;
} while (!(i & ((1<<TXINI)|(1<<RXOUTI))));
if (i & (1<<RXOUTI)) return; // abort
// send IN packet
n = len < ENDPOINT0_SIZE ? len : ENDPOINT0_SIZE;
for (i = n; i; i--) {
// just send zeros
UEDATX = 0;
}
len -= n;
usb_send_in();
} while (len || n == ENDPOINT0_SIZE);
return;
}
if (bmRequestType == 0x21 && bRequest == HID_SET_REPORT) {
len = RAWHID_RX_SIZE;
do {
n = len < ENDPOINT0_SIZE ? len : ENDPOINT0_SIZE;
usb_wait_receive_out();
// ignore incoming bytes
usb_ack_out();
len -= n;
} while (len);
usb_wait_in_ready();
usb_send_in();
return;
}
}
if (wIndex == DEBUG_INTERFACE) {
if (bRequest == HID_GET_REPORT && bmRequestType == 0xA1) {
len = wLength;
do {
// wait for host ready for IN packet
do {
i = UEINTX;
} while (!(i & ((1<<TXINI)|(1<<RXOUTI))));
if (i & (1<<RXOUTI)) return; // abort
// send IN packet
n = len < ENDPOINT0_SIZE ? len : ENDPOINT0_SIZE;
for (i = n; i; i--) {
UEDATX = 0;
}
len -= n;
usb_send_in();
} while (len || n == ENDPOINT0_SIZE);
return;
}
if (bRequest == HID_SET_REPORT && bmRequestType == 0x21) {
if (wValue == 0x0300 && wLength == 0x0004) {
uint8_t b1, b2, b3, b4;
usb_wait_receive_out();
b1 = UEDATX;
b2 = UEDATX;
b3 = UEDATX;
b4 = UEDATX;
usb_ack_out();
usb_send_in();
if (b1 == 0xA9 && b2 == 0x45 && b3 == 0xC2 && b4 == 0x6B)
_reboot_Teensyduino_();
if (b1 == 0x8B && b2 == 0xC5 && b3 == 0x1D && b4 == 0x70)
_restart_Teensyduino_();
}
}
}
if (bRequest == 0xC9 && bmRequestType == 0x40) {
usb_send_in();
usb_wait_in_ready();
_restart_Teensyduino_();
}
}
UECONX = (1<<STALLRQ) | (1<<EPEN); // stall
}