求助：Arduino向串口写16进制数据问题

shory

shum_elli 发表于 2022-5-17 20:35
楼主 能否把读取BL0940数据的代码发下，现在刚好需要用到这个芯片呃呃呃

我也是参考了许多Github上的示例来的，其实我也不会计算...

1. unsigned char bl0940Data[35];       // BL0940返回数据

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1. // 接收数据
   
2. while(Serial.available() > 0) {
   
3.         if(Serial.peek() == 0x55) {
   
4.             Serial.readBytes(bl0940Data, 35);
   
5.         }
   
6.     }

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1. //解析电能信息
   
2. void parseBL0940Data()
   
3. {
   
4.     //当前电压
   
5.     uint32_t tmpV = (uint32_t(bl0940Data[12])&0xFF) <<16 | (uint32_t(bl0940Data[11])&0xFF) <<8 | (uint32_t(bl0940Data[10])&0xFF);
   
6.     int currentV = round(((float)tmpV * 2376.318) / 79931000.0f);
   
7. 
   
8.     //当前电流
   
9.     uint32_t bl0940Current = (uint32_t(bl0940Data[6])&0xFF) << 16 | (uint32_t(bl0940Data[5])&0xFF) << 8 | (uint32_t(bl0940Data[4])&0xFF);
   
10.     float currentI = ((float)bl0940Current * 1.218) / 324004.0f;
    
11. 
    
12.     //当前功率
    
13. //    int32_t tmpW = (uint32_t(bl0940Data[18])&0xFF) <<24 | (uint32_t(bl0940Data[17])&0xFF) <<16 | (uint32_t(bl0940Data[16])&0xFF) << 8;
    
14. //    int32_t tepWW = tmpW >> 8;
    
15. //    currentW = tepWW * 1.218 * 1.218 * 1951.0f) / (4046000.0f);
    
16. 
    
17.     long powerValue = 0x7FFFFF & (((uint32_t(bl0940Data[18])&0xFF)<<16) | ((uint32_t(bl0940Data[17])&0xFF)<<8) | (uint32_t(bl0940Data[18])&0xFF));
    
18.     powerValue = ((uint32_t(bl0940Data[18])&0xFF) & 0x80) ? powerValue - 0x7FFFFF : powerValue;
    
19.     int currentW = round((((float)powerValue * 1.218 * 1.218 * 1951.0f)) / 4046000.0f);
    
20. 
    
21.     //当前电度数
    
22.     uint32_t tmpkWh = (uint32_t(bl0940Data[24])&0xFF) << 16 | (uint32_t(bl0940Data[23])&0xFF) << 8 | (uint32_t(bl0940Data[22])&0xFF);
    
23.     float currentkWh = (0.33721683 / 4046.0f) * (float)tmpkWh;
    
24. 
    
25.     //当前内部温度
    
26.     uint16_t tps = (uint32_t(bl0940Data[29])&0xFF) << 8 | (uint32_t(bl0940Data[28])&0xFF);
    
27.     byte currentT = round((170.0f/448.0f)*(((float)tps/2.0f)-32.0f)-45.0f);
    
28. 
    
29. }

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