[問題] BIT FILED的STRUCTURE能超過8BIT嗎?
大家好,我在用微控器寫程式,我想請問BIT FILED的
UNION和STRUCTURE宣告,是否有辦法直接處理超過8位元的變數
比如下方的STURCTURE定義:
有沒有辦法將
uint8_t VUV_8LSB : 8;
uint8_t VUV_4MSB : 4;
uint8_t VOV_4LSB : 4;
uint8_t VOV_8MSB : 8;
直接做成
uint16_t VUV :12;
uint16_t VOV :12;
而不會浪費任何空間呢?
typedef struct cfgw_tag {
union {
struct {
uint8_t CFGR0;
uint8_t CFGR1;
uint8_t CFGR2;
uint8_t CFGR3;
uint8_t CFGR4;
uint8_t CFGR5;
};
struct {
uint8_t ADCOPT :1;
uint8_t SWTRD :1;
uint8_t REFON :1;
uint8_t GPIO :5;
uint8_t VUV_8LSB : 8;
uint8_t VUV_4MSB : 4;
uint8_t VOV_4LSB : 4;
uint8_t VOV_8MSB : 8;
uint8_t DCC_8LSB : 8;
uint8_t DCC_4MSB : 4;
uint8_t DCTO : 4;
};
};
}CFG_WRITE;
--
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