41 lines
914 B
Plaintext
41 lines
914 B
Plaintext
#ifndef SOFTI2C_H
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#define SOFTI2C_H
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#include <Arduino.h>
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class SoftI2C {
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private:
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uint8_t sda_pin;
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uint8_t scl_pin;
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uint32_t delay_us;
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void sda_low() { digitalWrite(sda_pin, LOW); }
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void sda_high() { digitalWrite(sda_pin, HIGH); }
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void scl_low() { digitalWrite(scl_pin, LOW); }
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void scl_high() { digitalWrite(scl_pin, HIGH); }
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bool read_sda() { return digitalRead(sda_pin); }
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void i2c_delay() { delayMicroseconds(delay_us); }
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void start_condition();
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void stop_condition();
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bool write_byte(uint8_t data);
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uint8_t read_byte(bool ack);
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bool send_ack();
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void send_nack();
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public:
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SoftI2C(uint8_t sda, uint8_t scl, uint32_t freq = 100000);
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void begin();
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void end();
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bool begin_transmission(uint8_t addr);
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bool write(uint8_t data);
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bool end_transmission();
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uint8_t request_from(uint8_t addr, uint8_t count);
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uint8_t read();
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bool available();
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};
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#endif |