43 lines
957 B
C
43 lines
957 B
C
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#include "guangshi.h"
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uint8_t bizohi=0;
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#define AC_SAMPLE_TIME 100 // 采样时间窗口
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#define AC_CHANGE_THRESHOLD 5 // 最小变化次数阈值
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static uint8_t last_ac_status = 0;
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static uint8_t change_count = 0;
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static uint32_t sample_timer = 0;
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void Check_Power_Source(void)
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{
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uint8_t current_ac = Read_MainPower();
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// 检测电平变化
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if(current_ac != last_ac_status)
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{
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change_count++;
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last_ac_status = current_ac;
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}
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sample_timer++;
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// 采样时间窗口到达后判断
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if(sample_timer >= AC_SAMPLE_TIME)
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{
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// 如果在采样窗口内检测到足够的变化次数，说明交流电存在
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if(change_count >= AC_CHANGE_THRESHOLD)
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{
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bizohi = 1; // 市电正常
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}
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else
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{
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bizohi = 2; // 市电断开
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}
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// 重置计数器
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change_count = 0;
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sample_timer = 0;
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}
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}
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