93 lines
2.6 KiB
C
93 lines
2.6 KiB
C
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#pragma once
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#include "flipper.h"
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#include "flipper_v2.h"
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#include "one_wire_timings.h"
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// TODO fix GPL compability
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// currently we use rework of OneWireHub
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#define ONE_WIRE_MAX_DEVICES 1
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#define ONE_WIRE_TREE_SIZE ((2 * ONE_WIRE_MAX_DEVICES) - 1)
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#define OWET OneWireEmulateTiming
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class OneWireDevice;
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enum class OneWireGpioSlaveError : uint8_t {
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NO_ERROR = 0,
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READ_TIMESLOT_TIMEOUT = 1,
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WRITE_TIMESLOT_TIMEOUT = 2,
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WAIT_RESET_TIMEOUT = 3,
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VERY_LONG_RESET = 4,
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VERY_SHORT_RESET = 5,
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PRESENCE_LOW_ON_LINE = 6,
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READ_TIMESLOT_TIMEOUT_LOW = 7,
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AWAIT_TIMESLOT_TIMEOUT_HIGH = 8,
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PRESENCE_HIGH_ON_LINE = 9,
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INCORRECT_ONEWIRE_CMD = 10,
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INCORRECT_SLAVE_USAGE = 11,
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TRIED_INCORRECT_WRITE = 12,
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FIRST_TIMESLOT_TIMEOUT = 13,
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FIRST_BIT_OF_BYTE_TIMEOUT = 14,
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RESET_IN_PROGRESS = 15
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};
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class OneWireGpioSlave {
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private:
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const GpioPin* gpio;
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bool overdrive_mode = false;
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uint8_t cmd;
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OneWireGpioSlaveError error;
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uint8_t error_place;
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uint8_t devices_count;
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OneWireDevice* devices[ONE_WIRE_MAX_DEVICES];
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OneWireDevice* device_selected;
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struct IDTree {
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uint8_t device_selected; // for which slave is this jump-command relevant
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uint8_t id_position; // where does the algorithm has to look for a junction
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uint8_t got_zero; // if 0 switch to which tree branch
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uint8_t got_one; // if 1 switch to which tree branch
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} id_tree[ONE_WIRE_TREE_SIZE];
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public:
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OneWireGpioSlave(const GpioPin* one_wire_gpio);
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~OneWireGpioSlave();
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void start(void);
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void stop(void);
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bool emulate();
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bool check_reset(void);
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bool show_presence(void);
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bool receive_and_process_cmd(void);
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bool receive(uint8_t* data, const uint8_t data_length = 1);
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bool receive_bit(void);
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bool send_bit(bool value);
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bool send(const uint8_t* address, const uint8_t data_length = 1);
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OneWiteTimeType wait_while_gpio_is(volatile OneWiteTimeType retries, const bool pin_value);
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// set pin state
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inline void pin_set_float();
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inline void pin_set_low();
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// get error text
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const char* decode_error();
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// devices managment
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uint8_t attach(OneWireDevice& device);
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bool detach(const OneWireDevice& device);
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bool detach(uint8_t device_number);
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uint8_t get_next_device_index(const uint8_t index_start = 0) const;
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// id tree managment
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uint8_t build_id_tree(void);
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uint8_t build_id_tree(uint8_t id_bit_position, uint32_t device_mask);
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uint8_t get_first_bit_set_position(uint32_t mask) const;
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uint8_t get_first_id_tree_el_position(void) const;
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// commands
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void cmd_search_rom(void);
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};
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