STM32链接TSIC506F代码

TSIC506F是一款数字温度传感器，可以通过STM32的定时器输入捕获模式进行测量。以下是一个基本的示例代码：

#include "stm32f10x.h"
#include "stdio.h"

#define TSIC_TIMER TIM2
#define TSIC_CHANNEL TIM_Channel_1

volatile uint16_t tsic_raw_value = 0;
volatile float tsic_temperature = 0;

void TIM2_IRQHandler(void)
{
    if(TIM_GetITStatus(TSIC_TIMER, TIM_IT_CC1) != RESET)
    {
        static uint16_t tsic_capture_value_prev = 0;
        uint16_t tsic_capture_value = TIM_GetCapture1(TSIC_TIMER);
        
        if(tsic_capture_value_prev > tsic_capture_value)
        {
            // Overflow occurred, calculate the difference
            tsic_raw_value = 0xFFFF - tsic_capture_value_prev + tsic_capture_value + 1;
        }
        else
        {
            tsic_raw_value = tsic_capture_value - tsic_capture_value_prev;
        }
        tsic_capture_value_prev = tsic_capture_value;
        
        tsic_temperature = (float)tsic_raw_value * 0.03125;
        
        TIM_ClearITPendingBit(TSIC_TIMER, TIM_IT_CC1);
    }
}

void TIM2_Configuration(void)
{
    TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
    TIM_OCInitTypeDef TIM_OCInitStructure;
    NVIC_InitTypeDef NVIC_InitStructure;
    
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
    
    TIM_TimeBaseStructure.TIM_Period = 0xFFFF;
    TIM_TimeBaseStructure.TIM_Prescaler = 71;
    TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseInit(TSIC_TIMER, &TIM_TimeBaseStructure);
    
    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Timing;
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
    TIM_OCInitStructure.TIM_Pulse = 0xFFFF;
    TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
    TIM_OC1Init(TSIC_TIMER, &TIM_OCInitStructure);
    
    TIM_ITConfig(TSIC_TIMER, TIM_IT_CC1, ENABLE);
    
    NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x00;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x00;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);
    
    TIM_Cmd(TSIC_TIMER, ENABLE);
}

int main(void)
{
    TIM2_Configuration();
    
    while(1)
    {
        printf("TSIC temperature: %.2f C\n", tsic_temperature);
        DelayMs(1000);
    }
}

在此示例中，定时器TIM2被配置为输入捕获模式，使用TSIC_CHANNEL通道捕获TSIC506F的输出脉冲。每当TSIC_CHANNEL通道捕获到一个上升沿时，就会触发TIM2_IRQHandler中断处理程序。在该中断处理程序中，计算两个连续捕获值之间的差异，并将其转换为温度值。最后，在主循环中打印温度值并延迟1秒钟。