STM32F40x 内部温度获取

矫情吗；* 2022-06-17 11:44 231阅读 0赞

\#include "ADC.h"  
  
  
//user guide  
// in board init, call function: adc\_init();  
// get\_internal\_temperture(); get tempertare, uinit℃  
  
  
static void AdcPinComInit(void)  
\{  
ADC\_CommonInitTypeDef ADC\_InitStructure;  
RCC\_APB2PeriphClockCmd(RCC\_APB2Periph\_ADC1 , ENABLE);  
  
ADC\_InitStructure.ADC\_Mode = ADC\_DualMode\_RegSimult;  
ADC\_InitStructure.ADC\_Prescaler = ADC\_Prescaler\_Div2;  
ADC\_InitStructure.ADC\_DMAAccessMode = ADC\_DMAAccessMode\_Disabled;  
ADC\_InitStructure.ADC\_TwoSamplingDelay = ADC\_TwoSamplingDelay\_6Cycles;  
ADC\_CommonInit(&ADC\_InitStructure);  
\}  
  
  
static void Adc1ChxConfig(void)  
\{  
ADC\_InitTypeDef ADC\_InitStructure;  
  
  
ADC\_TempSensorVrefintCmd(ENABLE);  
ADC\_InitStructure.ADC\_Resolution = ADC\_Resolution\_12b;  
ADC\_InitStructure.ADC\_ScanConvMode = ENABLE;  
ADC\_InitStructure.ADC\_ContinuousConvMode = ENABLE;  
ADC\_InitStructure.ADC\_ExternalTrigConvEdge = ADC\_ExternalTrigConvEdge\_None;  
ADC\_InitStructure.ADC\_ExternalTrigConv = ADC\_ExternalTrigConv\_T1\_CC1;  
ADC\_InitStructure.ADC\_DataAlign = ADC\_DataAlign\_Right;  
ADC\_InitStructure.ADC\_NbrOfConversion = 1;  
ADC\_Init(ADC1, &ADC\_InitStructure);  
  
ADC\_ContinuousModeCmd(ADC1, ENABLE);  
ADC\_Cmd(ADC1, ENABLE);  
\}  
  
  
void adc\_init(void)  
\{  
AdcPinComInit();  
Adc1ChxConfig();  
\}  
  
  
uint16\_t get\_internal\_temperture(void)  
\{  
uint16\_t temp\_adc\_value;  
uint16\_t temperature;  
  
ADC\_TempSensorVrefintCmd(ENABLE);  
ADC\_RegularChannelConfig(ADC1, ADC\_Channel\_TempSensor, 1, ADC\_SampleTime\_15Cycles);   
ADC\_SoftwareStartConv(ADC1);  
while(!ADC\_GetFlagStatus(ADC1, ADC\_FLAG\_EOC));  
  
temp\_adc\_value = ADC\_GetConversionValue(ADC1);  
  
// T = (Vsense -V15)/AVG\_Slope +25 ,  
//Vsense = (adc\_value \*3.3)/4096, 12bit ADC  
// V25 = 0.76,AVG\_Slope = 2.5mV/℃  
temperature = ((temp\_adc\_value \* 3.3)/4096 - 0.76) \*1000/2.5 + 25 ;  
return temperature;

实际测量的值为40℃左右。