flipperzero-firmware/firmware/targets/furi-hal-include/furi-hal-vcp.h

#pragma once

#include <stdbool.h>
#include <stdint.h>
#include <string.h>

#ifdef __cplusplus
extern "C" {
#endif

/**
 * Init VCP HAL
 * Allocates ring buffer and initializes state
 */
void furi_hal_vcp_init();

/**
 * Recieve data from VCP
 * Waits till some data arrives, never returns 0
 * @param buffer - pointer to buffer
 * @param size - buffer size
 * @return items copied in buffer, 0 if channel closed
 */
size_t furi_hal_vcp_rx(uint8_t* buffer, size_t size);

/**
 * Recieve data from VCP with timeout
 * Waits till some data arrives during timeout
 * @param buffer - pointer to buffer
 * @param size - buffer size
 * @param timeout - rx timeout in ms
 * @return items copied in buffer, 0 if channel closed or timeout occurs
 */
size_t furi_hal_vcp_rx_with_timeout(uint8_t* buffer, size_t size, uint32_t timeout);

/**
 * Transmit data to VCP
 * @param buffer - pointer to buffer
 * @param size - buffer size
 */
void furi_hal_vcp_tx(const uint8_t* buffer, size_t size);

#ifdef __cplusplus
}
#endif