这是函数库I2C头文件里的内容，但是却没有找到一篇能把这段程序讲解清楚的中文资料。
/* I2C Events */
/* EV1 */
#define I2C_EVENT_SLAVE_TRANSMITTER_ADDRESS_MATCHED ((u32)0x00060082) /* TRA, BUSY, TXE and ADDR flags */
#define I2C_EVENT_SLAVE_RECEIVER_ADDRESS_MATCHED ((u32)0x00020002) /* BUSY and ADDR flags */
#define I2C_EVENT_SLAVE_TRANSMITTER_SECONDADDRESS_MATCHED ((u32)0x00860080) /* DUALF, TRA, BUSY and TXE flags */
#define I2C_EVENT_SLAVE_RECEIVER_SECONDADDRESS_MATCHED ((u32)0x00820000) /* DUALF and BUSY flags */
#define I2C_EVENT_SLAVE_GENERALCALLADDRESS_MATCHED ((u32)0x00120000) /* GENCALL and BUSY flags */
/* EV2 */
#define I2C_EVENT_SLAVE_BYTE_RECEIVED ((u32)0x00020040) /* BUSY and RXNE flags */
/* EV3 */
#define I2C_EVENT_SLAVE_BYTE_TRANSMITTED ((u32)0x00060084) /* TRA, BUSY, TXE and BTF flags */
/* EV4 */
#define I2C_EVENT_SLAVE_STOP_DETECTED ((u32)0x00000010) /* STOPF flag */
/* EV5 */
#define I2C_EVENT_MASTER_MODE_SELECT ((u32)0x00030001) /* BUSY, MSL and SB flag */
/* EV6 */
#define I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED ((u32)0x00070082) /* BUSY, MSL, ADDR, TXE and TRA flags */
#define I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED ((u32)0x00030002) /* BUSY, MSL and ADDR flags */
/* EV7 */
#define I2C_EVENT_MASTER_BYTE_RECEIVED ((u32)0x00030040) /* BUSY, MSL and RXNE flags */
/* EV8 */
#define I2C_EVENT_MASTER_BYTE_TRANSMITTING ((u32)0x00070080) /* TRA, BUSY, MSL, TXE flags */
/* EV8_2 */
#define I2C_EVENT_MASTER_BYTE_TRANSMITTED ((u32)0x00070084) /* TRA, BUSY, MSL, TXE and BTF flags */
/* EV9 */
#define I2C_EVENT_MASTER_MODE_ADDRESS10 ((u32)0x00030008) /* BUSY, MSL and ADD10 flags */
/* EV3_2 */
#define I2C_EVENT_SLAVE_ACK_FAILURE ((u32)0x00000400) /* AF flag */
#define IS_I2C_EVENT(EVENT) (((EVENT) == I2C_EVENT_SLAVE_TRANSMITTER_ADDRESS_MATCHED) || \
((EVENT) == I2C_EVENT_SLAVE_RECEIVER_ADDRESS_MATCHED) || \
((EVENT) == I2C_EVENT_SLAVE_TRANSMITTER_SECONDADDRESS_MATCHED) || \
((EVENT) == I2C_EVENT_SLAVE_RECEIVER_SECONDADDRESS_MATCHED) || \
((EVENT) == I2C_EVENT_SLAVE_GENERALCALLADDRESS_MATCHED) || \
((EVENT) == I2C_EVENT_SLAVE_BYTE_RECEIVED) || \
((EVENT) == (I2C_EVENT_SLAVE_BYTE_RECEIVED | I2C_FLAG_DUALF)) || \
((EVENT) == (I2C_EVENT_SLAVE_BYTE_RECEIVED | I2C_FLAG_GENCALL)) || \
((EVENT) == I2C_EVENT_SLAVE_BYTE_TRANSMITTED) || \
((EVENT) == (I2C_EVENT_SLAVE_BYTE_TRANSMITTED | I2C_FLAG_DUALF)) || \
((EVENT) == (I2C_EVENT_SLAVE_BYTE_TRANSMITTED | I2C_FLAG_GENCALL)) || \
((EVENT) == I2C_EVENT_SLAVE_STOP_DETECTED) || \
((EVENT) == I2C_EVENT_MASTER_MODE_SELECT) || \
((EVENT) == I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED) || \
((EVENT) == I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED) || \
((EVENT) == I2C_EVENT_MASTER_BYTE_RECEIVED) || \
((EVENT) == I2C_EVENT_MASTER_BYTE_TRANSMITTED) || \
((EVENT) == I2C_EVENT_MASTER_MODE_ADDRESS10) || \
((EVENT) == I2C_EVENT_SLAVE_ACK_FAILURE)) |
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