flipperzero-firmware/firmware/targets/f7/furi-hal/furi-hal-usb-cdc_i.h

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#pragma once
#include <stdint.h>
#include "usb_cdc.h"
#define CDC_DATA_SZ 64
typedef struct {
void (*tx_ep_callback)(void* context);
void (*rx_ep_callback)(void* context);
void (*state_callback)(void* context, uint8_t state);
void (*ctrl_line_callback)(void* context, uint8_t state);
void (*config_callback)(void* context, struct usb_cdc_line_coding* config);
} CdcCallbacks;
void furi_hal_cdc_set_callbacks(uint8_t if_num, CdcCallbacks* cb, void* context);
struct usb_cdc_line_coding* furi_hal_cdc_get_port_settings(uint8_t if_num);
uint8_t furi_hal_cdc_get_ctrl_line_state(uint8_t if_num);
void furi_hal_cdc_send(uint8_t if_num, uint8_t* buf, uint16_t len);
int32_t furi_hal_cdc_receive(uint8_t if_num, uint8_t* buf, uint16_t max_len);