40-AHT20-温湿度传感器
AHT20-温湿度传感器1.时序2.说明3.CRC4.计算公示voidATH20_Read_CTdata_Step1(u32*ct);voidATH20_Read_CTdata_Step2(u32*ct);u32ATH20_Calc_C(u32*ct);u32ATH20_Calc_T(u32*ct);////#defineAHT20_ADDRESS0x38//I2C´Ó»úµØÖ·voidATH20_Read_CTdata_Step1(u32*ct){u16 cnt0;u8 tmp[10];tmp[0]0x33;tmp[1]0x00;I2C_Write(AHT20_ADDRESS,0XAC,tmp,2);//0X70,0XAC,0X33,0X00}voidATH20_Read_CTdata_Step2(u32*ct){u8 data[10];u32 RetuData0;I2C_Read(AHT20_ADDRESS,0x00,data,7);RetuData0;RetuData(RetuData|data[1])8;RetuData(RetuData|data[2])8;RetuData(RetuData|data[3]);RetuDataRetuData4;ct[0]RetuData;RetuData0;RetuData(RetuData|data[3])8;RetuData(RetuData|data[4])8;RetuData(RetuData|data[5]);RetuDataRetuData0xfffff;ct[1]RetuData;}u32ATH20_Calc_C(u32*ct){returnct[0]*1000/1024/1024;//扩大了十倍}u32ATH20_Calc_T(u32*ct){returnct[1]*200*10/1024/1024-500;//扩大了十倍}