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usblib.h
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usblib.h
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/* Copyright (C) 2021 Sam Bazley
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
*/
#ifndef USBLIB_H
#define USBLIB_H
#include <stdint.h>
struct usb_setup_packet {
uint8_t bmRequestType;
uint8_t bRequest;
uint16_t wValue;
uint16_t wIndex;
uint16_t wLength;
};
struct usb_endpoint {
const uint16_t rx_size, tx_size;
const uint16_t type;
const enum {DIR_BIDIR, DIR_IN, DIR_OUT} dir;
};
struct usb_interface {
const uint16_t index;
uint16_t alternate;
void (*on_ctrl) (struct usb_interface *, struct usb_setup_packet *);
};
struct usb_descriptor {
const uint16_t wValue;
const uint16_t wIndex;
const uint8_t *addr;
const uint8_t length;
};
struct usb_configuration {
struct usb_endpoint *endpoints;
struct usb_interface *interfaces;
struct usb_descriptor *descriptors;
uint8_t endpoint_count;
uint8_t interface_count;
uint8_t descriptor_count;
void (*on_correct_transfer)(uint8_t ep, uint8_t *data, uint8_t len);
void (*on_reset)();
void (*log_str)(const char *str);
void (*log_int)(uint32_t n);
};
#define USB_EP(x) (&USB->EP0R + x * 2)
uint8_t usb_get_selected_config();
uint8_t usb_has_received_request();
void usb_send_data(uint8_t endpoint, const uint8_t *data, uint16_t length,
uint16_t wLength);
void usb_ep_set_tx_status(uint8_t ep, uint16_t status);
void usb_ep_set_rx_status(uint8_t ep, uint16_t status);
void usb_ack(uint8_t ep);
void usb_init(struct usb_configuration *conf);
#endif /* USBLIB_H */