arm的i2c接口读，需要连读2次才可以吗？该怎么解决

  quarticarm发表于 昨天 13:32 | 只看该作者 回复 引用 编辑 订阅 收藏 分享 评分打印楼主： arm的i2c接口读，需要连读2次才可以吗？接口, arm, activity, register, addressint i2c_read(int reg_offset){    int data;        int activity;      //        reg_offset = reg_offset | 0x100 ;    //        mem_wr_i2c(0x10, reg_offset);        // IC_DATA_CMD: set register address    *(volatile UINT32 *)0x18500010 = reg_offset;    //        mem_wr_i2c(0x10, 0x100);                // IC_DATA_CMD: set read bit    *(volatile UINT32 *)0x18500010 = 0x100;    ic_status = mem_rd_i2c(0x70);        // IC STATUS register. LSB is the common activity bit    activity = ic_status & 0x1;    while (activity == 0)    {        ic_status = mem_rd_i2c(0x70);        // IC STATUS register. LSB is the common activity bit        activity = ic_status & 0x1;    }data = mem_rd_i2c(0x10);                // IC_DATA_CMD: read returned register value    //printf("1:%d\n",data);    ic_status = mem_rd_i2c(0x70);        // IC STATUS register. LSB is the common activity bit    activity = ic_status & 0x1;    while (activity == 1)    {        readCounter++;        ic_status = mem_rd_i2c(0x70);        // IC STATUS register. LSB is the common activity bit        activity = ic_status & 0x1;    }       data = mem_rd_i2c(0x10);                // IC_DATA_CMD: read returned register value    printf("2:%d\n",data);        return (data);}