基于stm32f429，利用内置温度传感器和ADC外设，测量芯片工作温度

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我是靠谱客的博主彪壮花生，最近开发中收集的这篇文章主要介绍基于stm32f429，利用内置温度传感器和ADC外设，测量芯片工作温度，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

说明

基于stm32f429，利用内置温度传感器和ADC外设，测量芯片工作温度，再通过DMA外设将ADC外设数据传到内存中，利用串口打印输出。（串口部分驱动代码省略）

通过暖风机测试，工作温度从24度左右上升至37度。

Flowchart

配置好ADC1外设。
配置好DMA
开启温度传感器
利用如下公式打印到串口，根据官方数据手册V25 = 0.76 V, Avg_Slope =0.0025 V/C 因为是内置设备无需配置任何的GPIO

ADC相关头文件

#ifndef __BSP_ADC_H
#define __BSP_ADC_H

#include "stm32f4xx_gpio.h"
#include "stm32f4xx_rcc.h"
#include "stm32f4xx_adc.h"

#define  Temp_sensor_channel    ADC_Channel_18 
#define  ADC1_Channel		    DMA_Channel_0


#define  ADC1_DR_ADDR			((uint32_t)ADC1+0x4C)

void Temp_Sensor_ADC_Init(void);

ADC相关配置源文件

#include "bsp_adc.h"

__IO uint16_t ADC_ConvertedValue;

void Temp_Sensor_ADC_Config(void)
{
	/*初始化DMA, ADC, ADC_Common结构体*/
	ADC_InitTypeDef ADC_InitStruct;
	DMA_InitTypeDef DMAInitStruct;
	ADC_CommonInitTypeDef ADC_CommonInitStruct;
	/**************配置DMA************/
	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2, ENABLE);
	/*DMA配置如下*/
	DMAInitStruct.DMA_BufferSize = 1;
	DMAInitStruct.DMA_Channel = DMA_Channel_0;
	DMAInitStruct.DMA_DIR = DMA_DIR_PeripheralToMemory;
	DMAInitStruct.DMA_FIFOMode = DMA_FIFOMode_Disable ;
	DMAInitStruct.DMA_FIFOThreshold = DMA_FIFOThreshold_Full  ;
	DMAInitStruct.DMA_Memory0BaseAddr = (uint32_t)&(ADC_ConvertedValue);
	DMAInitStruct.DMA_MemoryBurst =DMA_MemoryBurst_Single ;
	DMAInitStruct.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord  ;
	DMAInitStruct.DMA_MemoryInc =DMA_MemoryInc_Disable  ;
	DMAInitStruct.DMA_Mode = DMA_Mode_Circular ;
	DMAInitStruct.DMA_PeripheralBaseAddr = ADC1_DR_ADDR;
	DMAInitStruct.DMA_PeripheralBurst = DMA_PeripheralBurst_Single  ;
	DMAInitStruct.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord ;
	DMAInitStruct.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
	DMAInitStruct.DMA_Priority =DMA_Priority_High;
	DMA_Init(DMA2_Stream0, &DMAInitStruct);
	DMA_Cmd(DMA2_Stream0, ENABLE);
	
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
	
	/*****************ADC_Common配置如下***********************/
	ADC_CommonInitStruct.ADC_DMAAccessMode = ADC_DMAAccessMode_Disabled;
	ADC_CommonInitStruct.ADC_Mode = ADC_Mode_Independent;
	ADC_CommonInitStruct.ADC_Prescaler = ADC_Prescaler_Div4;
	ADC_CommonInitStruct.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_20Cycles;
	ADC_CommonInit(&ADC_CommonInitStruct);
	
	ADC_InitStruct.ADC_Resolution = ADC_Resolution_12b;
	ADC_InitStruct.ADC_DataAlign = ADC_DataAlign_Right;
	ADC_InitStruct.ADC_ExternalTrigConv =ADC_ExternalTrigConv_T1_CC1 ;
	ADC_InitStruct.ADC_ExternalTrigConvEdge =ADC_ExternalTrigConvEdge_None; 
	ADC_InitStruct.ADC_NbrOfConversion = 1;
	ADC_InitStruct.ADC_ScanConvMode = DISABLE;
	ADC_InitStruct.ADC_ContinuousConvMode = ENABLE;
	ADC_Init(ADC1, &ADC_InitStruct);
	
	ADC_RegularChannelConfig(ADC1,Temp_sensor_channel,1,ADC_SampleTime_56Cycles );
	
	ADC_DMARequestAfterLastTransferCmd(ADC1, ENABLE);
	ADC_DMACmd(ADC1, ENABLE);
	ADC_Cmd(ADC1, ENABLE);
	ADC_TempSensorVrefintCmd(ENABLE); 
	ADC_SoftwareStartConv(ADC1);
	
}

void Temp_Sensor_ADC_Init(void)
	
{
	Temp_Sensor_ADC_Config();
}

Main函数

#include "stm32f4xx.h"
#include "bsp_usart.h"
#include "bsp_adc.h"

#define V25   0.76f
#define Avg_Slope 0.0025f


extern __IO uint16_t ADC_ConvertedValue;
static void Delay(__IO uint32_t nCount)	 //简单的延时函数
{
	for(; nCount != 0; nCount--);
}

int main(void){
	
	Usart_Config();
	Temp_Sensor_ADC_Init();

	
	
	while(1)
	{
		float data =(float) (ADC_ConvertedValue)/4096* (float)3.3;
		float temp = (data-V25)/Avg_Slope+25;
		    printf("rn The current temp = %f C rn",temp); 
		
		Delay(0xFFFFFF);
	}

		

}