mirror of https://github.com/ArduPilot/ardupilot
73 lines
1.8 KiB
C++
73 lines
1.8 KiB
C++
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#ifndef __AP_HAL_PX4_UARTDRIVER_H__
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#define __AP_HAL_PX4_UARTDRIVER_H__
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#include <AP_HAL_PX4.h>
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#include <systemlib/perf_counter.h>
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class PX4::PX4UARTDriver : public AP_HAL::UARTDriver {
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public:
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PX4UARTDriver(const char *devpath, const char *perf_name);
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/* PX4 implementations of UARTDriver virtual methods */
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void begin(uint32_t b);
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void begin(uint32_t b, uint16_t rxS, uint16_t txS);
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void end();
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void flush();
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bool is_initialized();
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void set_blocking_writes(bool blocking);
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bool tx_pending();
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/* PX4 implementations of Stream virtual methods */
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int16_t available();
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int16_t txspace();
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int16_t read();
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/* PX4 implementations of Print virtual methods */
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size_t write(uint8_t c);
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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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_devpath = path;
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}
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void _timer_tick(void);
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int _get_fd(void) {
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return _fd;
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}
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private:
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const char *_devpath;
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int _fd;
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uint32_t _baudrate;
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volatile bool _initialised;
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volatile bool _in_timer;
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bool _nonblocking_writes;
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// we use in-task ring buffers to reduce the system call cost
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// of ::read() and ::write() in the main loop
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uint8_t *_readbuf;
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uint16_t _readbuf_size;
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// _head is where the next available data is. _tail is where new
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// data is put
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volatile uint16_t _readbuf_head;
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volatile uint16_t _readbuf_tail;
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uint8_t *_writebuf;
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uint16_t _writebuf_size;
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volatile uint16_t _writebuf_head;
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volatile uint16_t _writebuf_tail;
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perf_counter_t _perf_uart;
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int _write_fd(const uint8_t *buf, uint16_t n);
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int _read_fd(uint8_t *buf, uint16_t n);
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uint64_t _last_write_time;
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void try_initialise(void);
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uint32_t _last_initialise_attempt_ms;
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};
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#endif // __AP_HAL_PX4_UARTDRIVER_H__
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