backup 14041130

14041130/TestLCD/SoftI2C.hhhh

@@ -0,0 +1,41 @@
+#ifndef SOFTI2C_H
+#define SOFTI2C_H
+
+#include <Arduino.h>
+
+class SoftI2C {
+private:
+  uint8_t sda_pin;
+  uint8_t scl_pin;
+  uint32_t delay_us;
+  
+  void sda_low() { digitalWrite(sda_pin, LOW); }
+  void sda_high() { digitalWrite(sda_pin, HIGH); }
+  void scl_low() { digitalWrite(scl_pin, LOW); }
+  void scl_high() { digitalWrite(scl_pin, HIGH); }
+  bool read_sda() { return digitalRead(sda_pin); }
+  
+  void i2c_delay() { delayMicroseconds(delay_us); }
+  
+  void start_condition();
+  void stop_condition();
+  bool write_byte(uint8_t data);
+  uint8_t read_byte(bool ack);
+  bool send_ack();
+  void send_nack();
+  
+public:
+  SoftI2C(uint8_t sda, uint8_t scl, uint32_t freq = 100000);
+  
+  void begin();
+  void end();
+  
+  bool begin_transmission(uint8_t addr);
+  bool write(uint8_t data);
+  bool end_transmission();
+  uint8_t request_from(uint8_t addr, uint8_t count);
+  uint8_t read();
+  bool available();
+};
+
+#endif