29 lines
859 B
C
Executable file
29 lines
859 B
C
Executable file
#include "LM75A.h"
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#include "stm32f4xx_hal.h"
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#include "i2c.h"
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#include "usart.h"
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/**************************************************
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@brif 设置设备模式
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@para ConfReg:配置寄存器地址
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Mode:需要配置的模式
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@rev: 无
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****************************************************/
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void LM75SetMode(uint8_t ConfReg, uint8_t Mode)
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{
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while(HAL_I2C_Mem_Write(&hi2c1,LM75A_ADDR,ConfReg,1,&Mode,1,100) != HAL_OK); //写模式寄存器
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}
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uint16_t LM75GetTempReg(void) //从LM75A读取温度数据（2字节））
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{
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uint8_t data[2];
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while(HAL_I2C_Mem_Read(&hi2c1,LM75A_ADDR,TEMP_ADDR,I2C_MEMADD_SIZE_8BIT,data,2,100)!=HAL_OK);
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return (data[0]<<8) + data[1];
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}
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double LM75GetTempValue(uint16_t tempreg) //将温度数据转换为温度值
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{
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if (tempreg >> 15 == 0)
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return (double)(tempreg >> 5) * 0.125;
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else return -1*(double)(((~tempreg)>>5) + 1)*0.125;
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}
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