qmk_firmware/usb.h

#ifndef USB_H
#define  USB_H 1

#include <stdint.h>
#include <avr/io.h>


void usb_init(void);			// initialize everything
uint8_t usb_configured(void);		// is the USB port configured




#define EP_TYPE_CONTROL			0x00
#define EP_TYPE_BULK_IN			0x81
#define EP_TYPE_BULK_OUT		0x80
#define EP_TYPE_INTERRUPT_IN		0xC1
#define EP_TYPE_INTERRUPT_OUT		0xC0
#define EP_TYPE_ISOCHRONOUS_IN		0x41
#define EP_TYPE_ISOCHRONOUS_OUT		0x40

#define EP_SINGLE_BUFFER		0x02
#define EP_DOUBLE_BUFFER		0x06

#define EP_SIZE(s)	((s) == 64 ? 0x30 :	\
			((s) == 32 ? 0x20 :	\
			((s) == 16 ? 0x10 :	\
			             0x00)))

#define MAX_ENDPOINT		4

#define LSB(n) (n & 255)
#define MSB(n) ((n >> 8) & 255)

#if defined(__AVR_AT90USB162__)
#define HW_CONFIG() 
#define PLL_CONFIG() (PLLCSR = ((1<<PLLE)|(1<<PLLP0)))
#define USB_CONFIG() (USBCON = (1<<USBE))
#define USB_FREEZE() (USBCON = ((1<<USBE)|(1<<FRZCLK)))
#elif defined(__AVR_ATmega32U4__)
#define HW_CONFIG() (UHWCON = 0x01)
#define PLL_CONFIG() (PLLCSR = 0x12)
#define USB_CONFIG() (USBCON = ((1<<USBE)|(1<<OTGPADE)))
#define USB_FREEZE() (USBCON = ((1<<USBE)|(1<<FRZCLK)))
#elif defined(__AVR_AT90USB646__)
#define HW_CONFIG() (UHWCON = 0x81)
#define PLL_CONFIG() (PLLCSR = 0x1A)
#define USB_CONFIG() (USBCON = ((1<<USBE)|(1<<OTGPADE)))
#define USB_FREEZE() (USBCON = ((1<<USBE)|(1<<FRZCLK)))
#elif defined(__AVR_AT90USB1286__)
#define HW_CONFIG() (UHWCON = 0x81)
#define PLL_CONFIG() (PLLCSR = 0x16)
#define USB_CONFIG() (USBCON = ((1<<USBE)|(1<<OTGPADE)))
#define USB_FREEZE() (USBCON = ((1<<USBE)|(1<<FRZCLK)))
#endif

// standard control endpoint request types
#define GET_STATUS			0
#define CLEAR_FEATURE			1
#define SET_FEATURE			3
#define SET_ADDRESS			5
#define GET_DESCRIPTOR			6
#define GET_CONFIGURATION		8
#define SET_CONFIGURATION		9
#define GET_INTERFACE			10
#define SET_INTERFACE			11
// HID (human interface device)
#define HID_GET_REPORT			1
#define HID_GET_IDLE			2
#define HID_GET_PROTOCOL		3
#define HID_SET_REPORT			9
#define HID_SET_IDLE			10
#define HID_SET_PROTOCOL		11
#define HID_REPORT_INPUT		1
#define HID_REPORT_OUTPUT		2
#define HID_REPORT_FEATURE		3
// CDC (communication class device)
#define CDC_SET_LINE_CODING		0x20
#define CDC_GET_LINE_CODING		0x21
#define CDC_SET_CONTROL_LINE_STATE	0x22

#endif