+++ /dev/null
-/* USB Keyboard Plus Debug Channel Example for Teensy USB Development Board
- * http://www.pjrc.com/teensy/usb_keyboard.html
- * Copyright (c) 2009 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.
- */
-
-// Version 1.0: Initial Release
-// Version 1.1: Add support for Teensy 2.0
-
-#define USB_SERIAL_PRIVATE_INCLUDE
-#include "usb_keyboard_debug.h"
-
-/**************************************************************************
- *
- * Configurable Options
- *
- **************************************************************************/
-
-// USB devices are supposed to implment a halt feature, which is
-// rarely (if ever) used. If you comment this line out, the halt
-// code will be removed, saving 102 bytes of space (gcc 4.3.0).
-// This is not strictly USB compliant, but works with all major
-// operating systems.
-#define SUPPORT_ENDPOINT_HALT
-
-
-
-/**************************************************************************
- *
- * Endpoint Buffer Configuration
- *
- **************************************************************************/
-
-#define ENDPOINT0_SIZE 32
-
-#define KEYBOARD_INTERFACE 0
-#define KEYBOARD_ENDPOINT 3
-#define KEYBOARD_SIZE 8
-#define KEYBOARD_BUFFER EP_DOUBLE_BUFFER
-
-#define DEBUG_INTERFACE 1
-#define DEBUG_TX_ENDPOINT 4
-#define DEBUG_TX_SIZE 32
-#define DEBUG_TX_BUFFER EP_DOUBLE_BUFFER
-
-static const uint8_t PROGMEM endpoint_config_table[] = {
- 0,
- 0,
- 1, EP_TYPE_INTERRUPT_IN, EP_SIZE(KEYBOARD_SIZE) | KEYBOARD_BUFFER,
- 1, EP_TYPE_INTERRUPT_IN, EP_SIZE(DEBUG_TX_SIZE) | DEBUG_TX_BUFFER
-};
-
-
-/**************************************************************************
- *
- * 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
- 0x00, 0x01, // bcdDevice
- 1, // iManufacturer
- 2, // iProduct
- 3, // iSerialNumber
- 1 // bNumConfigurations
-};
-
-// Keyboard Protocol 1, HID 1.11 spec, Appendix B, page 59-60
-static const uint8_t PROGMEM keyboard_hid_report_desc[] = {
- 0x05, 0x01, // Usage Page (Generic Desktop),
- 0x09, 0x06, // Usage (Keyboard),
- 0xA1, 0x01, // Collection (Application),
- 0x75, 0x01, // Report Size (1),
- 0x95, 0x08, // Report Count (8),
- 0x05, 0x07, // Usage Page (Key Codes),
- 0x19, 0xE0, // Usage Minimum (224),
- 0x29, 0xE7, // Usage Maximum (231),
- 0x15, 0x00, // Logical Minimum (0),
- 0x25, 0x01, // Logical Maximum (1),
- 0x81, 0x02, // Input (Data, Variable, Absolute), ;Modifier byte
- 0x95, 0x01, // Report Count (1),
- 0x75, 0x08, // Report Size (8),
- 0x81, 0x03, // Input (Constant), ;Reserved byte
- 0x95, 0x05, // Report Count (5),
- 0x75, 0x01, // Report Size (1),
- 0x05, 0x08, // Usage Page (LEDs),
- 0x19, 0x01, // Usage Minimum (1),
- 0x29, 0x05, // Usage Maximum (5),
- 0x91, 0x02, // Output (Data, Variable, Absolute), ;LED report
- 0x95, 0x01, // Report Count (1),
- 0x75, 0x03, // Report Size (3),
- 0x91, 0x03, // Output (Constant), ;LED report padding
- 0x95, 0x06, // Report Count (6),
- 0x75, 0x08, // Report Size (8),
- 0x15, 0x00, // Logical Minimum (0),
- 0x25, 0x68, // Logical Maximum(104),
- 0x05, 0x07, // Usage Page (Key Codes),
- 0x19, 0x00, // Usage Minimum (0),
- 0x29, 0x68, // Usage Maximum (104),
- 0x81, 0x00, // Input (Data, Array),
- 0xc0 // End Collection
-};
-
-static const uint8_t PROGMEM debug_hid_report_desc[] = {
- //0x06, 0x30, 0xFF, // Usage Page 0xFF31 (vendor defined)
- 0x06, 0x31, 0xFF, // Usage Page 0xFF31 (vendor defined)
- 0x09, 0x74, // Usage 0x74
- 0xA1, 0x53, // Collection 0x53
- 0x75, 0x08, // report size = 8 bits
- 0x15, 0x00, // logical minimum = 0
- 0x26, 0xFF, 0x00, // logical maximum = 255
- 0x95, DEBUG_TX_SIZE, // report count
- 0x09, 0x75, // usage
- 0x81, 0x02, // Input (array)
- 0xC0 // end collection
-};
-
-#define CONFIG1_DESC_SIZE (9+9+9+7+9+9+7)
-#define KEYBOARD_HID_DESC_OFFSET (9+9)
-#define DEBUG_HID_DESC_OFFSET (9+9+9+7+9)
-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),
- 2, // bNumInterfaces
- 1, // bConfigurationValue
- 0, // iConfiguration
- 0xC0, // bmAttributes
- 50, // bMaxPower
- // interface descriptor, USB spec 9.6.5, page 267-269, Table 9-12
- 9, // bLength
- 4, // bDescriptorType
- KEYBOARD_INTERFACE, // bInterfaceNumber
- 0, // bAlternateSetting
- 1, // bNumEndpoints
- 0x03, // bInterfaceClass (0x03 = HID)
- 0x01, // bInterfaceSubClass (0x01 = Boot)
- 0x01, // bInterfaceProtocol (0x01 = Keyboard)
- 0, // 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(keyboard_hid_report_desc), // wDescriptorLength
- 0,
- // endpoint descriptor, USB spec 9.6.6, page 269-271, Table 9-13
- 7, // bLength
- 5, // bDescriptorType
- KEYBOARD_ENDPOINT | 0x80, // bEndpointAddress
- 0x03, // bmAttributes (0x03=intr)
- KEYBOARD_SIZE, 0, // wMaxPacketSize
- 1, // bInterval
- // interface descriptor, USB spec 9.6.5, page 267-269, Table 9-12
- 9, // bLength
- 4, // bDescriptorType
- DEBUG_INTERFACE, // bInterfaceNumber
- 0, // bAlternateSetting
- 1, // bNumEndpoints
- 0x03, // bInterfaceClass (0x03 = HID)
- 0x00, // bInterfaceSubClass
- 0x00, // bInterfaceProtocol
- 0, // 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
- 1 // 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_MANUFACTURER),
- 3,
- STR_MANUFACTURER
-};
-static const struct usb_string_descriptor_struct PROGMEM string2 = {
- sizeof(STR_PRODUCT),
- 3,
- STR_PRODUCT
-};
-static const struct usb_string_descriptor_struct PROGMEM string3 = {
- sizeof(STR_SERIAL),
- 3,
- STR_SERIAL
-};
-
-// 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, KEYBOARD_INTERFACE, keyboard_hid_report_desc, sizeof(keyboard_hid_report_desc)},
- {0x2100, KEYBOARD_INTERFACE, config1_descriptor+KEYBOARD_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_MANUFACTURER)},
- {0x0302, 0x0409, (const uint8_t *)&string2, sizeof(STR_PRODUCT)},
- {0x0303, 0x0409, (const uint8_t *)&string3, sizeof(STR_SERIAL)}
-};
-#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
-static volatile uint8_t usb_configuration=0;
-
-// the time remaining before we transmit any partially full
-// packet, or send a zero length packet.
-static volatile uint8_t debug_flush_timer=0;
-
-
-/**************************************************************************
- *
- * Public Functions - these are the API intended for the user
- *
- **************************************************************************/
-
-
-// initialize USB
-void usb_init(void)
-{
- 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;
- UDIEN = (1<<EORSTE)|(1<<SOFE);
- sei();
-}
-
-// return 0 if the USB is not configured, or the configuration
-// number selected by the HOST
-uint8_t usb_configured(void)
-{
- return usb_configuration;
-}
-
-// send the contents of USBKeys_Array and USBKeys_Modifiers
-int8_t usb_keyboard_send(void)
-{
- uint8_t i, intr_state, timeout;
-
- if (!usb_configuration) return -1;
- intr_state = SREG;
- cli();
- UENUM = KEYBOARD_ENDPOINT;
- timeout = UDFNUML + 50;
- while (1) {
- // are we ready to transmit?
- if (UEINTX & (1<<RWAL)) break;
- SREG = intr_state;
- // has the USB gone offline?
- if (!usb_configuration) return -1;
- // have we waited too long?
- if (UDFNUML == timeout) return -1;
- // get ready to try checking again
- intr_state = SREG;
- cli();
- UENUM = KEYBOARD_ENDPOINT;
- }
- UEDATX = USBKeys_Modifiers;
- UEDATX = 0;
- for (i=0; i<6; i++) {
- UEDATX = USBKeys_Array[i];
- }
- UEINTX = 0x3A;
- USBKeys_Idle_Count = 0;
- SREG = intr_state;
- return 0;
-}
-
-// transmit a character. 0 returned on success, -1 on error
-int8_t usb_debug_putchar(uint8_t c)
-{
- static uint8_t previous_timeout=0;
- uint8_t timeout, intr_state;
-
- // if we're not online (enumerated and configured), error
- if (!usb_configuration) return -1;
- // interrupts are disabled so these functions can be
- // used from the main program or interrupt context,
- // even both in the same program!
- intr_state = SREG;
- cli();
- UENUM = DEBUG_TX_ENDPOINT;
- // if we gave up due to timeout before, don't wait again
- if (previous_timeout) {
- if (!(UEINTX & (1<<RWAL))) {
- SREG = intr_state;
- return -1;
- }
- previous_timeout = 0;
- }
- // wait for the FIFO to be ready to accept data
- timeout = UDFNUML + 4;
- while (1) {
- // are we ready to transmit?
- if (UEINTX & (1<<RWAL)) break;
- SREG = intr_state;
- // have we waited too long?
- if (UDFNUML == timeout) {
- previous_timeout = 1;
- return -1;
- }
- // has the USB gone offline?
- if (!usb_configuration) return -1;
- // get ready to try checking again
- intr_state = SREG;
- cli();
- UENUM = DEBUG_TX_ENDPOINT;
- }
- // actually write the byte into the FIFO
- UEDATX = c;
- // if this completed a packet, transmit it now!
- if (!(UEINTX & (1<<RWAL))) {
- UEINTX = 0x3A;
- debug_flush_timer = 0;
- } else {
- debug_flush_timer = 2;
- }
- SREG = intr_state;
- return 0;
-}
-
-
-// immediately transmit any buffered output.
-void usb_debug_flush_output(void)
-{
- uint8_t intr_state;
-
- intr_state = SREG;
- cli();
- if (debug_flush_timer) {
- UENUM = DEBUG_TX_ENDPOINT;
- while ((UEINTX & (1<<RWAL))) {
- UEDATX = 0;
- }
- UEINTX = 0x3A;
- debug_flush_timer = 0;
- }
- SREG = intr_state;
-}
-
-
-
-/**************************************************************************
- *
- * 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, i;
- static uint8_t div4=0;
-
- 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;
- }
- }
- if (USBKeys_Idle_Config && (++div4 & 3) == 0) {
- UENUM = KEYBOARD_ENDPOINT;
- if (UEINTX & (1<<RWAL)) {
- USBKeys_Idle_Count++;
- if (USBKeys_Idle_Count == USBKeys_Idle_Config) {
- USBKeys_Idle_Count = 0;
- UEDATX = USBKeys_Modifiers;
- UEDATX = 0;
- for (i=0; i<6; i++) {
- UEDATX = USBKeys_Array[i];
- }
- UEINTX = 0x3A;
- }
- }
- }
- }
-}
-
-
-
-// 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;
- wValue = UEDATX;
- wValue |= (UEDATX << 8);
- wIndex = UEDATX;
- wIndex |= (UEDATX << 8);
- wLength = UEDATX;
- wLength |= (UEDATX << 8);
- 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;
- }
- desc_val = pgm_read_word(list);
- if (desc_val != wValue) {
- list += sizeof(struct descriptor_list_struct);
- continue;
- }
- list += 2;
- desc_val = pgm_read_word(list);
- if (desc_val != wIndex) {
- list += sizeof(struct descriptor_list_struct)-2;
- continue;
- }
- list += 2;
- desc_addr = (const uint8_t *)pgm_read_word(list);
- list += 2;
- desc_length = pgm_read_byte(list);
- break;
- }
- len = (wLength < 256) ? wLength : 255;
- if (len > desc_length) len = desc_length;
- 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 = pgm_read_byte(desc_addr++);
- }
- 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;
- usb_send_in();
- cfg = endpoint_config_table;
- for (i=1; i<5; i++) {
- UENUM = i;
- en = pgm_read_byte(cfg++);
- UECONX = en;
- if (en) {
- UECFG0X = pgm_read_byte(cfg++);
- UECFG1X = pgm_read_byte(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;
- #ifdef SUPPORT_ENDPOINT_HALT
- if (bmRequestType == 0x82) {
- UENUM = wIndex;
- if (UECONX & (1<<STALLRQ)) i = 1;
- UENUM = 0;
- }
- #endif
- UEDATX = i;
- UEDATX = 0;
- usb_send_in();
- return;
- }
- #ifdef SUPPORT_ENDPOINT_HALT
- if ((bRequest == CLEAR_FEATURE || bRequest == SET_FEATURE)
- && bmRequestType == 0x02 && wValue == 0) {
- i = wIndex & 0x7F;
- if (i >= 1 && i <= MAX_ENDPOINT) {
- 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;
- }
- }
- #endif
- if (wIndex == KEYBOARD_INTERFACE) {
- if (bmRequestType == 0xA1) {
- if (bRequest == HID_GET_REPORT) {
- usb_wait_in_ready();
- UEDATX = USBKeys_Modifiers;
- UEDATX = 0;
- for (i=0; i<6; i++) {
- UEDATX = USBKeys_Array[i];
- }
- usb_send_in();
- return;
- }
- if (bRequest == HID_GET_IDLE) {
- usb_wait_in_ready();
- UEDATX = USBKeys_Idle_Config;
- usb_send_in();
- return;
- }
- if (bRequest == HID_GET_PROTOCOL) {
- usb_wait_in_ready();
- UEDATX = USBKeys_Protocol;
- usb_send_in();
- return;
- }
- }
- if (bmRequestType == 0x21) {
- if (bRequest == HID_SET_REPORT) {
- usb_wait_receive_out();
- USBKeys_LEDs = UEDATX;
- usb_ack_out();
- usb_send_in();
- return;
- }
- if (bRequest == HID_SET_IDLE) {
- USBKeys_Idle_Config = (wValue >> 8);
- USBKeys_Idle_Count = 0;
- //usb_wait_in_ready();
- usb_send_in();
- return;
- }
- if (bRequest == HID_SET_PROTOCOL) {
- USBKeys_Protocol = wValue;
- //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;
- }
- }
- }
- UECONX = (1<<STALLRQ) | (1<<EPEN); // stall
-}
-
projects / kiibohd-controller.git / blobdiff