ardupilot/libraries/AP_HAL_Linux/UARTDriver.h

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#pragma once
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#include <AP_HAL/utility/OwnPtr.h>
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#include "AP_HAL_Linux.h"
#include "SerialDevice.h"
namespace Linux {
class UARTDriver : public AP_HAL::UARTDriver {
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public:
UARTDriver(bool default_console);
static UARTDriver *from(AP_HAL::UARTDriver *uart) {
return static_cast<UARTDriver*>(uart);
}
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/* Linux implementations of UARTDriver virtual methods */
void begin(uint32_t b);
void begin(uint32_t b, uint16_t rxS, uint16_t txS);
void end();
void flush();
bool is_initialized();
void set_blocking_writes(bool blocking);
bool tx_pending();
/* Linux implementations of Stream virtual methods */
uint32_t available() override;
uint32_t txspace() override;
int16_t read() override;
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/* Linux implementations of Print virtual methods */
size_t write(uint8_t c);
size_t write(const uint8_t *buffer, size_t size);
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void set_device_path(const char *path);
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bool _write_pending_bytes(void);
virtual void _timer_tick(void);
virtual enum flow_control get_flow_control(void) override
{
return _device->get_flow_control();
}
virtual void set_flow_control(enum flow_control flow_control_setting) override
{
_device->set_flow_control(flow_control_setting);
}
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private:
AP_HAL::OwnPtr<SerialDevice> _device;
bool _nonblocking_writes;
bool _console;
volatile bool _in_timer;
uint16_t _base_port;
char *_ip;
char *_flag;
bool _connected; // true if a client has connected
bool _packetise; // true if writes should try to be on mavlink boundaries
void _allocate_buffers(uint16_t rxS, uint16_t txS);
void _deallocate_buffers();
AP_HAL::OwnPtr<SerialDevice> _parseDevicePath(const char *arg);
uint64_t _last_write_time;
protected:
const char *device_path;
volatile bool _initialised;
// we use in-task ring buffers to reduce the system call cost
// of ::read() and ::write() in the main loop
uint8_t *_readbuf;
uint16_t _readbuf_size;
// _head is where the next available data is. _tail is where new
// data is put
volatile uint16_t _readbuf_head;
volatile uint16_t _readbuf_tail;
uint8_t *_writebuf;
uint16_t _writebuf_size;
volatile uint16_t _writebuf_head;
volatile uint16_t _writebuf_tail;
virtual int _write_fd(const uint8_t *buf, uint16_t n);
virtual int _read_fd(uint8_t *buf, uint16_t n);
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};
}