/*

 * Copyright (c) 2003 Bernd Walter

 * All rights reserved.

 */

/*  Example Source Code for USB Enumeration using a PDIUSBD11 connected to a PIC16F87x

 *  Copyright 2001 Craig Peacock, Craig.Peacock@beyondlogic.org

 *  31th December 2001 http://www.beyondlogic.org            				      

 */

typedef struct {

    uint8_t bmRequestType;

    uint8_t bRequest;

    uint16_t wValue;

    uint16_t wIndex;

    uint16_t wLength;

}  __attribute__ ((packed)) USB_SETUP_REQUEST;

typedef struct {

    uint8_t bLength;

    uint8_t bDescriptorType;

    uint16_t bcdUSB;

    uint8_t bDeviceClass;

    uint8_t bDeviceSubClass;

    uint8_t bDeviceProtocol;

    uint8_t bMaxPacketSize0;

    uint16_t idVendor;

    uint16_t idProduct;

    uint16_t bcdDevice;

    uint8_t iManufacturer;

    uint8_t iProduct;

    uint8_t iSerialNumber;

    uint8_t bNumConfigurations;

} __attribute__ ((packed))  USB_DEVICE_DESCRIPTOR;

typedef struct {

    uint8_t bLength;

    uint8_t bDescriptorType;

    uint8_t bEndpointAddress;

    uint8_t bmAttributes;

    uint16_t wMaxPacketSize;

    uint8_t bInterval;

} __attribute__ ((packed))  USB_ENDPOINT_DESCRIPTOR;

typedef struct {

    uint8_t bLength;

    uint8_t bDescriptorType;

    uint16_t wTotalLength;

    uint8_t bNumInterfaces;

    uint8_t bConfigurationValue;

    uint8_t iConfiguration;

    uint8_t bmAttributes;

    uint8_t MaxPower;

} __attribute__ ((packed))  USB_CONFIGURATION_DESCRIPTOR;

typedef struct {

    uint8_t bLength;

    uint8_t bDescriptorType;

    uint8_t bInterfaceNumber;

    uint8_t bAlternateSetting;

    uint8_t bNumEndpoints;

    uint8_t bInterfaceClass;

    uint8_t bInterfaceSubClass;

    uint8_t bInterfaceProtocol;

    uint8_t iInterface;

} __attribute__ ((packed))  USB_INTERFACE_DESCRIPTOR;

typedef struct {

    uint8_t bLength;

    uint8_t bDescriptorType;

    uint16_t wHIDClassSpecComp;

    uint8_t bCountry;

    uint8_t bNumDescriptors;

    uint8_t b1stDescType;

    uint16_t w1stDescLength;

} __attribute__ ((packed))  USB_HID_DESCRIPTOR;

typedef struct {

    USB_CONFIGURATION_DESCRIPTOR ConfigDescriptor;

    USB_INTERFACE_DESCRIPTOR InterfaceDescriptor0;

    USB_ENDPOINT_DESCRIPTOR EndpointDescriptor00;

    USB_ENDPOINT_DESCRIPTOR EndpointDescriptor01;

    USB_INTERFACE_DESCRIPTOR InterfaceDescriptor1;

    USB_ENDPOINT_DESCRIPTOR EndpointDescriptor10;

    USB_ENDPOINT_DESCRIPTOR EndpointDescriptor11;

} __attribute__ ((packed))  USB_CONFIG_DATA;

typedef struct {

    uint8_t bLength;

    uint8_t bDescriptorType;

    char     bString[];

} __attribute__ ((packed))  STRING_DESCRIPTOR;

typedef struct {

    uint8_t bLength;

    uint8_t bDescriptorType;

    uint16_t wLANGID0;

} __attribute__ ((packed))  LANGID_DESCRIPTOR;

#define D12_SET_ADDRESS_ENABLE		0xd0

#define D12_SET_ENDPOINT_ENABLE  	0xd8

#define D12_SET_MODE			0xf3

#define D12_SET_DMA			0xfb

#define D12_READ_INTERRUPT_REGISTER 	0xf4

#define D12_READ_BUFFER			0xf0

#define D12_WRITE_BUFFER		0xf0

#define D12_ACK_SETUP			0xf2

#define D12_CLEAR_BUFFER		0xf2

#define D12_VALIDATE_BUFFER		0xfa

#define D12_READ_LAST_TRANSACTION	0x40

#define D12_SET_ENDPOINT_STATUS		0x40

#define D12_READ_ENDPOINT_STATUS	0x80

#define D12_READ_CHIP_ID		0xfd

#define D12_ENDPOINT_EP0_OUT 		0x00

#define D12_ENDPOINT_EP0_IN 		0x01

#define D12_ENDPOINT_EP1_OUT 		0x02

#define D12_ENDPOINT_EP1_IN 		0x03

#define D12_ENDPOINT_EP2_OUT 		0x04

#define D12_ENDPOINT_EP2_IN 		0x05

#define D12_INT_EP0_OUT			0x01

#define D12_INT_EP0_IN			0x02

#define D12_INT_EP1_OUT			0x04

#define D12_INT_EP1_IN			0x08

#define D12_INT_EP2_OUT			0x10

#define D12_INT_EP2_IN			0x20

#define D12_INT_BUS_RESET		0x40

#define D12_INT_SUSPEND			0x80

#define D12_LAST_TRAN_OK		0x01

#define D12_LAST_TRAN_ERRMSK		0x1e

#define D12_LAST_TRAN_SETUP		0x20

#define D12_LAST_TRAN_DATA		0x40

#define D12_LAST_TRAN_OFLOW		0x80

#define STANDARD_DEVICE_REQUEST		0x00

#define STANDARD_INTERFACE_REQUEST	0x01

#define STANDARD_ENDPOINT_REQUEST	0x02

#define VENDOR_DEVICE_REQUEST		0x40

#define VENDOR_INTERFACE_REQUEST	0x41

#define VENDOR_ENDPOINT_REQUEST		0x42

#define GET_STATUS  			0

#define CLEAR_FEATURE     		1

#define SET_FEATURE                 	3

#define SET_ADDRESS                 	5

#define GET_DESCRIPTOR              	6

#define SET_DESCRIPTOR              	7

#define GET_CONFIGURATION           	8

#define SET_CONFIGURATION           	9

#define GET_INTERFACE               	10

#define SET_INTERFACE               	11

#define SYNCH_FRAME                 	12

#define VENDOR_DOTEMP			125

#define VENDOR_UPDATE			126

#define VENDOR_RESET			127

#define	ENDPOINT_HALT			0

#define TYPE_DEVICE_DESCRIPTOR          1

#define TYPE_CONFIGURATION_DESCRIPTOR   2

#define TYPE_STRING_DESCRIPTOR          3

#define TYPE_INTERFACE_DESCRIPTOR       4

#define TYPE_ENDPOINT_DESCRIPTOR        5

#define TYPE_HID_DESCRIPTOR		0x21

#define USB_ENDPOINT_TYPE_CONTROL	0x00

#define USB_ENDPOINT_TYPE_ISOCHRONOUS	0x01

#define USB_ENDPOINT_TYPE_BULK		0x02

#define USB_ENDPOINT_TYPE_INTERRUPT	0x03

/* Function prototypes */

uint8_t		d12_get_data(void);

void		d12_set_data(uint8_t data);

void		d12_set_cmd(uint8_t cmd);

void		d12_write_cmd(uint8_t command, const uint8_t *buffer, uint8_t count);

void		d12_read_cmd(uint8_t command, uint8_t *buffer, uint8_t count);

uint8_t		d12_read_endpt(uint8_t endpt, uint8_t *buffer);

void		d12_ep0_irq(void);

void		d12_handle_setup(void);

void		d12_getdescriptor(USB_SETUP_REQUEST *setuppkt);

void		d12_stallendpt(uint8_t ep);

uint8_t		d12_read_endpt(uint8_t endpt, uint8_t *buffer);

void		d12_write_endpt(uint8_t endpt, const uint8_t *buffer, uint8_t bytes);

void		d12_send_data_ep0(void);

void		d12_receive_data_ep1(void);

void		d12_send_data_ep2(void);

void		d12_receive_data_ep2(void);

void 		reset(void);

void		usb_init(void);

void		usb_intr(void);

void		usb_gendata(void);

/*

 * The PDIUSBD12 is wired up like so

 *

 *  PDI		     AVR	

 * ======================

 * D7:0     <=>     PA7:0	   

 * RD_N     <=      PB0

 * INT_N     =>     PB1

 * WR_N     <=      PB2

 * A0       <=      PB3 (0 = data, 1 = cmd)

 * SUSPEND  <=>     PB4

 */

#define PDIPORT	PORTA

#define PDIDDR	PORTA

#define PDICTL	PORTB

#define PDIRD	PB0

#define PDIINT	PB1

#define PDIWR	PB2

#define PDIA0	PB3

#define PDISUSP	PB4