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