今天在使用stm32的i2c1的双地址从模式时发现一个问题
在3.5的外设库stm32f10x_i2c.h头文件421行处,有如下定义
/* --EV1 (all the events below are variants of EV1) */
/* 1) Case of One Single Address managed by the slave */
#define I2C_EVENT_SLAVE_RECEIVER_ADDRESS_MATCHED ((uint32_t)0x00020002) /* BUSY and ADDR flags */
#define I2C_EVENT_SLAVE_TRANSMITTER_ADDRESS_MATCHED ((uint32_t)0x00060082) /* TRA, BUSY, TXE and ADDR flags */
/* 2) Case of Dual address managed by the slave */
#define I2C_EVENT_SLAVE_RECEIVER_SECONDADDRESS_MATCHED ((uint32_t)0x00820000) /* DUALF and BUSY flags */
#define I2C_EVENT_SLAVE_TRANSMITTER_SECONDADDRESS_MATCHED ((uint32_t)0x00860080) /* DUALF, TRA, BUSY and TXE flags */
/* 3) Case of General Call enabled for the slave */
#define I2C_EVENT_SLAVE_GENERALCALLADDRESS_MATCHED ((uint32_t)0x00120000) /* GENCALL and BUSY flags */
按照说明的理解,这个几个事件应该是接受到地址+R/W后触发的,那么是否应该少了ADDR位呢?
#define I2C_EVENT_SLAVE_RECEIVER_SECONDADDRESS_MATCHED ((uint32_t)0x00820002) /* DUALF and BUSY flags */
#define I2C_EVENT_SLAVE_TRANSMITTER_SECONDADDRESS_MATCHED ((uint32_t)0x00860082) /* DUALF, TRA, BUSY and TXE flags */
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