rp2040/driver/inc/usb.h

#ifndef __HARDWARE_USB_H__
#define __HARDWARE_USB_H__

#include "usb_reg.h"
#include "usb_common.h"

typedef void (*usb_ep_handler)(uint8_t *buf, uint16_t len);

// Struct in which we keep the endpoint configuration
struct usb_endpoint_configuration {
    const struct usb_endpoint_descriptor *descriptor;
    usb_ep_handler handler;

    // Pointers to endpoint + buffer control registers
    // in the USB controller DPSRAM
    volatile uint32_t *endpoint_control;
    volatile uint32_t *buffer_control;
    volatile uint8_t *data_buffer;

    // Toggle after each packet (unless replying to a SETUP)
    uint8_t next_pid;
};

// Struct in which we keep the device configuration
struct usb_device_configuration {
    const struct usb_device_descriptor *device_descriptor;
    const struct usb_interface_descriptor *interface_descriptor;
    const struct usb_configuration_descriptor *config_descriptor;
    const unsigned char *lang_descriptor;
    const unsigned char **descriptor_strings;
    // USB num endpoints is 16
    struct usb_endpoint_configuration endpoints[USB_NUM_ENDPOINTS];
};

#ifdef __cplusplus
extern "C" {
#endif

#ifndef MIN
#define MIN(a,b) ((a)<(b)?(a):(b))
#endif

#ifndef MAX
#define MAX(a,b) ((a)>(b)?(a):(b))
#endif

int usb_is_configured(void);
void usb_start_transfer(struct usb_endpoint_configuration *ep, uint8_t *buf, uint16_t len);
void usb_device_init(struct usb_device_configuration *dev_config);
struct usb_endpoint_configuration *usb_get_endpoint_configuration(uint8_t addr);

#ifdef __cplusplus
}
#endif

#endif /* __HARDWARE_USB_H__ */