uint8_t i2cm_send_stop(void);
uint8_t i2cm_receive_byte(uint8_t last);
-#define I2C_CTRL_SYNC 0
+uint8_t i2cm_send(uint8_t addr, uint8_t* data, uint8_t len);
+uint8_t i2cm_recv(uint8_t addr, uint8_t len);
+uint8_t i2cm_get_recv_buffer(uint8_t* buf, uint8_t len);
#define I2C_ERR_SEND_START 1