c语言位域结构体和联合体共同定义例子

原创已于 2024-08-15 17:13:58 修改 · 204 阅读

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于 2024-08-15 17:10:45 首次发布

typedef struct 
{   
    union  
    {
        __IO uint16_t CTRL1;
        struct
        {  
        UINT16 cc1_connect_flg :1;
        UINT16 cc3_connect_flg :1;
        UINT16 pre_cc1_connect_flg :1;
        UINT16 pre_cc3_connect_flg :1;

        UINT16 init_cc1_sink_flg:1;
        UINT16 init_cc3_sink_flg:1;
        UINT16 init_cc3_source_flg:1;
        UINT16 pre_init_cc1_sink_flg:1;
        UINT16 pre_init_cc3_sink_flg:1;
        UINT16 pre_init_cc3_source_flg:1;

        UINT16 cc1_detect_flg:1;
        UINT16 cc3_detect_flg:1;
        UINT16 cc1_get_power_ADC_ok_flg:1;
        UINT16 get_key_start_flg:1;
        UINT16 get_key_ok_flg:1;
        };  
    };
    union  
    {
        __IO uint16_t CTRL2;
        struct
        {  
        UINT16 cc3_pd_run_mode :4;
        UINT16 cc1_pd_run_flg :1;
        UINT16 get_sop1_flg :1;
        UINT16 cc1_get_source_cap_flg :1;
        UINT16 cc1_get_rdy_flg :1;
        UINT16 cc3_get_request_flg :1;
        UINT16 reverse:7;
        };  
    };
    uint8_t adapter_src_cap_len;



}G_PD_CTRL;

联合体中的两个结构体成员，公用同一段内存，使用时需注意。