帮我用C语言写一个实现耳机NTC测温的程序
时间: 2023-06-03 15:07:24 浏览: 75
当然,很高兴能够帮你编写这个程序。你需要有NTC热敏电阻、STM32F407开发板和一些基本的电子元件。下面是参考程序示例:
```c
#include "stdio.h"
#include "stm32f4xx.h"
#define VREF 3.3 // 设定参考电压
#define RREF 10000 // 设定参考电阻
#define R2 10000 // 设定被测电阻
int main(void)
{
GPIO_InitTypeDef GPIO_InitStruct;
// 初始化引脚
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOA, &GPIO_InitStruct);
// 初始化ADC
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
ADC_InitTypeDef ADC_InitStruct;
ADC_InitStruct.ADC_Resolution = ADC_Resolution_12b;
ADC_InitStruct.ADC_ScanConvMode = DISABLE;
ADC_InitStruct.ADC_ContinuousConvMode = DISABLE;
ADC_InitStruct.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
ADC_InitStruct.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStruct.ADC_NbrOfConversion = 1;
ADC_Init(ADC1, &ADC_InitStruct);
ADC_Cmd(ADC1, ENABLE);
// 启动ADC
ADC_RegularChannelConfig(ADC1, ADC_Channel_0, 1, ADC_SampleTime_480Cycles);
while (1)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
ADC_SoftwareStartConv(ADC1);
while (ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC) == RESET);
uint16_t ADCValue = ADC_GetConversionValue(ADC1);
float Vin = VREF * ADCValue / 4096.0;
float Rntc = (RREF * Vin) / (VREF - Vin);
float TempC = 1.0 / (0.001129148 + (0.000234125 + (0.0000000876741 * Rntc * Rntc)) * (Rntc - 10000.0)) - 273.15;
printf("Temperature: %f C\n", TempC);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, DISABLE);
}
}
```
程序中使用的是STM32F4的内置ADC实现读取NTC热敏电阻的电压值,并进行转换后输出温度值。你可以根据需求进行修改。希望能对你有所帮助!