pt1000怎么编程

时间:2025-03-01 03:29:39 明星趣事

PT1000 是一种热电阻,其电阻值随温度的变化呈线性关系。以下是一些关于如何编程PT1000的方法:

1. 使用C语言编程

示例代码

```c

include "bsp_adc.h"

define ADC1_DR_Address ((u32)0x40012400+0x4c)

__IO uint16_t ADC_ConvertedValue; //__IO u16 ADC_ConvertedValueLocal;

void ADC1_GPIO_Config(void) {

GPIO_InitTypeDef GPIO_InitStructure;

/* Enable DMA clock */

RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);

/* Enable ADC1 and GPIOC clock */

RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_GPIOC, ENABLE);

/* Configure PC.0 as analog input */

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;

GPIO_Init(GPIOC, &GPIO_InitStructure);

}

void ADC1_Init(void) {

ADC_InitTypeDef ADC_InitStructure;

ADC_InitStructure.ADC_Mode = ADC_Mode_Continuous;

ADC_InitStructure.ADC_ScanConvMode = ADC_ScanConvMode_Single;

ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;

ADC_InitStructure.ADC_NbrOfConversion = 1;

ADC_Init(ADC1, &ADC_InitStructure);

ADC_Cmd(ADC1, ENABLE);

}

u16 Read_ADC1(void) {

return ADC_ConvertedValue;

}

float Read_PT1000_Temperature(void) {

u16 adc_value = Read_ADC1();

// Convert ADC value to resistance value

// This is a simplified example, actual conversion may require calibration and handling of non-linearities

float resistance = (float)adc_value * 3.3 / 4096; // Convert 12-bit ADC value to Ohms

// Use lookup table to convert resistance to temperature

float temperature = 0.0;

for (int i = 0; i < 100; i++) {

if (resistance >= pt1000_table[i].resistance) {

temperature = pt1000_table[i].temperature;

break;

}

}

return temperature;

}

int main(void) {

ADC1_GPIO_Config();

ADC1_Init();

while (1) {

float temperature = Read_PT1000_Temperature();

printf("Temperature: %.2f°C\n", temperature);

// Add delay or other processing as needed

}

return 0;

}

```

2. 使用PLC编程语言

示例代码