import

i2c.h

@@ -0,0 +1,30 @@
+
+#ifndef I2C_H_QWERTY
+#define I2C_H_QWERTY
+
+#define PSC_I2C			1	  // I2C prescaler
+#define F_I2C			400000UL  // I2C Clock
+#define SET_TWBR		(F_CPU/F_I2C-16UL)/(PSC_I2C*2UL)
+
+#include <stdio.h>
+#include <avr/io.h>
+
+extern uint8_t i2c_error;
+
+#define I2C_ERR_START	        0 // Timeout start-condition
+#define I2C_ERR_SENDADRESS	1 // Timeout device-adress
+#define I2C_ERR_BYTE	        2 // Timeout byte-transmission
+#define I2C_ERR_READACK	        3 // Timeout read acknowledge
+#define I2C_ERR_READNACK	4 // Timeout read nacknowledge
+
+void i2c_init(void);
+
+void i2c_send_addr(uint8_t addr);
+void i2c_send_data(uint8_t byte);
+
+uint8_t i2c_read_ack(void);
+uint8_t i2c_read_nack(void);
+
+void i2c_stop(void);
+
+#endif