ardupilot/libraries/AP_HAL_F4Light/USBDriver.h

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#pragma once
#include <AP_HAL_F4Light/AP_HAL_F4Light.h>
#include <gpio_hal.h>
//#include <usb.h> can't include here because defines there conflicts with AP_Math
#include <usart.h>
#define DEFAULT_TX_TIMEOUT 10000
extern "C" {
extern int usb_open(void);
extern int usb_close(void);
uint32_t usb_data_available(void);
void usb_reset_rx();
}
namespace F4Light {
class USBDriver : public AP_HAL::UARTDriver {
public:
USBDriver(bool usb);
void begin(uint32_t b);
void begin(uint32_t b, uint16_t rxS, uint16_t txS) { begin(b); }
inline void end() { usb_close(); }
inline bool is_initialized(){ return _initialized; }
inline void set_blocking_writes(bool blocking) { _blocking=blocking; }
inline bool tx_pending() { return false; } // not used
void flush() { return; };
uint32_t available() override;
uint32_t txspace() override;
int16_t read() override;
size_t write(uint8_t c);
size_t write(const uint8_t *buffer, size_t size);
private:
bool _initialized;
bool _blocking;
};
} // namespace