mirror of
https://github.com/esphome/esphome.git
synced 2024-12-02 11:44:13 +01:00
68 lines
1.6 KiB
C++
68 lines
1.6 KiB
C++
#pragma once
|
|
|
|
#include "esphome/core/hal.h"
|
|
#include <vector>
|
|
|
|
namespace esphome {
|
|
namespace dallas {
|
|
|
|
extern const uint8_t ONE_WIRE_ROM_SELECT;
|
|
extern const int ONE_WIRE_ROM_SEARCH;
|
|
|
|
class ESPOneWire {
|
|
public:
|
|
explicit ESPOneWire(InternalGPIOPin *pin);
|
|
|
|
/** Reset the bus, should be done before all write operations.
|
|
*
|
|
* Takes approximately 1ms.
|
|
*
|
|
* @return Whether the operation was successful.
|
|
*/
|
|
bool reset();
|
|
|
|
/// Write a single bit to the bus, takes about 70µs.
|
|
void write_bit(bool bit);
|
|
|
|
/// Read a single bit from the bus, takes about 70µs
|
|
bool read_bit();
|
|
|
|
/// Write a word to the bus. LSB first.
|
|
void write8(uint8_t val);
|
|
|
|
/// Write a 64 bit unsigned integer to the bus. LSB first.
|
|
void write64(uint64_t val);
|
|
|
|
/// Write a command to the bus that addresses all devices by skipping the ROM.
|
|
void skip();
|
|
|
|
/// Read an 8 bit word from the bus.
|
|
uint8_t read8();
|
|
|
|
/// Read an 64-bit unsigned integer from the bus.
|
|
uint64_t read64();
|
|
|
|
/// Select a specific address on the bus for the following command.
|
|
void select(uint64_t address);
|
|
|
|
/// Reset the device search.
|
|
void reset_search();
|
|
|
|
/// Search for a 1-Wire device on the bus. Returns 0 if all devices have been found.
|
|
uint64_t search();
|
|
|
|
/// Helper that wraps search in a std::vector.
|
|
std::vector<uint64_t> search_vec();
|
|
|
|
protected:
|
|
/// Helper to get the internal 64-bit unsigned rom number as a 8-bit integer pointer.
|
|
inline uint8_t *rom_number8_();
|
|
|
|
ISRInternalGPIOPin pin_;
|
|
uint8_t last_discrepancy_{0};
|
|
bool last_device_flag_{false};
|
|
uint64_t rom_number_{0};
|
|
};
|
|
|
|
} // namespace dallas
|
|
} // namespace esphome
|