项目开发中STM32G030 读取 NTC温度值的启示 -

///*********************************************************
//Copyright(C), Gao Zhan Optoelectronic Technology Co. LTD
//Author: lanxichang
//Version : V0.0
//Date : 2023-05-09 17:28:29
//Date : 2023-05-27 09:10:10
//History :
//**********************************************************/
#include "temp.h"
#include "stm32g0xx_hal.h"
#include "stdbool.h"
#include "math.h"
//#ifdef HAL_ADC_MODULE_ENABLED
extern ADC_HandleTypeDef hadc1;
int ADC_Value;
extern float ADC_gather(void);
#define NUM 30
int ave_temp1[NUM+1];
uint8_t tableNum;
/***********************************************************************
备注说明：NTC就是随温度变化阻值变化的传感器，所以在硬件上只要计算出他现在是什么阻值就能得到他的温度,阻值随温度变化对照表
功能：查表函数
参数：
返回值：NTCTABNum 查表对应温度值（什么阻值对应什么温度）-50-125
*************************************************************************/
#define NTCTABNum 100
static float NTCTAB_2[NTCTABNum] = {
32.6142,30.9966,29.4688,28.0251,26.6606,25.3704,24.1501,22.9955,21.9028,20.8682,//0 - 9
19.8884,18.9602,18.0806,17.2467,16.4561,15.7061,14.9945,14.3191,13.6779,13.0690,//10 - 19
12.4905,11.9409,11.4184,10.9217,10.4494,10.0000,9.5724,9.1654,8.7779 ,8.4089 ,//20 - 29
8.0574 ,7.7225 ,7.4033 ,7.099 ,6.8088 ,6.5321 ,6.268 ,6.016 ,5.7755 ,5.5459 , //30 - 39
5.3266 ,5.1171 ,4.9169 ,4.7257 ,4.5428 ,4.368 ,4.2008 ,4.0409 ,3.8878 ,3.7414 , //40 - 49
3.6012 ,3.467 , 3.3385 ,3.2154 ,3.0975 ,2.9845 ,2.8762 ,2.7723 ,2.6727 ,2.5772 , //50 - 59
2.4856 ,2.3977 ,2.3134 ,2.2324 ,2.1547 ,2.0801 ,2.0084 ,1.9396 ,1.8734 ,1.8098 , //60 - 69
1.7487 ,1.69 ,1.6335 ,1.5792 ,1.5269 ,1.4767 ,1.4283 ,1.3818 ,1.3369 ,1.2938 , //70 - 79
1.2523 ,1.2123 ,1.1737 ,1.1366 ,1.1008 ,1.0663 ,1.0331 ,1.0011 ,0.9702 ,0.9404 , //80 - 89
0.9116,0.8839,0.8572,0.8314 ,0.8064,0.7824,0.7592,0.7367,0.7151,0.6942, //90 - 99
};
/***********************************************************************
功能：Tem_init初始化函数
参数：
返回值：
*************************************************************************/
void Temp_init(void)
{
GetResValue();
GetADCTemperature(&NTCTAB_2[NTCTABNum],tableNum);
GetMedian_Temperature();
}
/***********************************************************************
功能：将ADC采到的值转换成电阻
参数：channel：指定的ADC通道
返回值：res 电阻值
*************************************************************************/
float GetResValue(void)
{
float adc_v,res;
// //ADC_Value=ADC_gather();
// HAL_ADC_Start(&hadc1); //此开始函数必须放入for，若不是则采集第一次的ADC通道，即PA2
// HAL_ADC_Start_DMA(&hadc1, (uint32_t*)ADC_Value, 1);
// HAL_ADCEx_Calibration_Start(&hadc1);
// HAL_ADC_PollForConversion(&hadc1,50);
HAL_ADC_Start(&hadc1);
HAL_ADC_PollForConversion(&hadc1, 50);
ADC_Value = HAL_ADC_GetValue(&hadc1);
adc_v = (float)(ADC_Value&0xFFF)/4096*3.3; //将采集到值转换成电压 2^12=4096
res = 10 /( 4.096/adc_v-1); //电压转换成电阻
return res ;
}
/******************************a*****************************************
功能：查表函数
参数：1.tableNum ：表格的元素的个数
2.*p：表格
返回值：tem 当前阻值下的温度值
*************************************************************************/
float GetADCTemperature(float *p,uint8_t tableNum)
{
uint8_t i,index = 0;
float v1,v2,v3;
float tem;
float resdata;
resdata = GetResValue(); //电阻值,电阻测量函数返回值加载到 resdata
/*查表*/
for(i=0;i<(tableNum-1);i++)
{
if((resdata<p[i]) && (resdata>p[i+1]))
index = i;
}
v1 = p[index] - resdata;
v2 = p[index] - p[index+1];
v3 = v1/v2;
tem = v3+index;
return tem;
}
/***********************************************************************
功能：掐头去尾取平均值
参数：无
返回值：ave_temp 平均值
*************************************************************************/
float GetMedian_Temperature(void)
{
int i,j;
float tmp;
float ave_temp;
float sum1=0;
for(i=0;i<NUM;i++)
{
ave_temp1[i] = GetADCTemperature(NTCTAB_2,NTCTABNum); //将测得的温度值放大10倍存在int型数组中，方便后面上传有人云
//HAL_Delay(1);
}
for(i=0;i<NUM-1;i++) //排序
{
for(j=0;j<(NUM)-i;j++)
{
if(ave_temp1[j]<ave_temp1[j+1])
{
tmp = ave_temp1[j];
ave_temp1[j] = ave_temp1[j+1];
ave_temp1[j+1] = tmp;
}
}
}
for(i=5;i<NUM-5;i++) //掐头去尾取平均值
{
sum1 += ave_temp1[i];
}
ave_temp = sum1/(NUM-10); //减掉掐头去尾各5个数，求平均值
return ave_temp-9.2; // 因电阻值取值不一样，-9.2是为了临时校正温度值，后期全面校准才更改表格。

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/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file adc.c
* @brief This file provides code for the configuration
* of the ADC instances.
******************************************************************************
* @attention
*
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "adc.h"
/* USER CODE BEGIN 0 */
/* USER CODE END 0 */
ADC_HandleTypeDef hadc1;
/* ADC1 init function */
void MX_ADC1_Init(void)
{
/* USER CODE BEGIN ADC1_Init 0 */
/* USER CODE END ADC1_Init 0 */
ADC_ChannelConfTypeDef sConfig = {0};
/* USER CODE BEGIN ADC1_Init 1 */
/* USER CODE END ADC1_Init 1 */
/** Configure the global features of the ADC (Clock, Resolution, Data Alignment and number of conversion)
*/
hadc1.Instance = ADC1;
hadc1.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV2;
hadc1.Init.Resolution = ADC_RESOLUTION_12B;
hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
hadc1.Init.ScanConvMode = ADC_SCAN_DISABLE;
hadc1.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
hadc1.Init.LowPowerAutoWait = DISABLE;
hadc1.Init.LowPowerAutoPowerOff = DISABLE;
hadc1.Init.ContinuousConvMode = ENABLE;
hadc1.Init.NbrOfConversion = 1;
hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START;
hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
hadc1.Init.DMAContinuousRequests = DISABLE;
hadc1.Init.Overrun = ADC_OVR_DATA_PRESERVED;
hadc1.Init.SamplingTimeCommon1 = ADC_SAMPLETIME_1CYCLE_5;
hadc1.Init.SamplingTimeCommon2 = ADC_SAMPLETIME_1CYCLE_5;
hadc1.Init.OversamplingMode = DISABLE;
hadc1.Init.TriggerFrequencyMode = ADC_TRIGGER_FREQ_HIGH;
if (HAL_ADC_Init(&hadc1) != HAL_OK)
{
Error_Handler();
}
/** Configure Regular Channel
*/
sConfig.Channel = ADC_CHANNEL_11;
sConfig.Rank = ADC_REGULAR_RANK_1;
sConfig.SamplingTime = ADC_SAMPLINGTIME_COMMON_1;
if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN ADC1_Init 2 */
/* USER CODE END ADC1_Init 2 */
}
void HAL_ADC_MspInit(ADC_HandleTypeDef* adcHandle)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
if(adcHandle->Instance==ADC1)
{
/* USER CODE BEGIN ADC1_MspInit 0 */
/* USER CODE END ADC1_MspInit 0 */
/* ADC1 clock enable */
__HAL_RCC_ADC_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
/**ADC1 GPIO Configuration
PB10 ------> ADC1_IN11
*/
GPIO_InitStruct.Pin = GPIO_PIN_10;
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
/* USER CODE BEGIN ADC1_MspInit 1 */
/* USER CODE END ADC1_MspInit 1 */
}
}
void HAL_ADC_MspDeInit(ADC_HandleTypeDef* adcHandle)
{
if(adcHandle->Instance==ADC1)
{
/* USER CODE BEGIN ADC1_MspDeInit 0 */
/* USER CODE END ADC1_MspDeInit 0 */
/* Peripheral clock disable */
__HAL_RCC_ADC_CLK_DISABLE();
/**ADC1 GPIO Configuration
PB10 ------> ADC1_IN11
*/
HAL_GPIO_DeInit(GPIOB, GPIO_PIN_10);
/* USER CODE BEGIN ADC1_MspDeInit 1 */
/* USER CODE END ADC1_MspDeInit 1 */
}
}
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */

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