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贊就置頂啊，，，，呵呵

效果很不错

內部溫度傳感器+串口（UART2）+上位機軟件實現溫度監控

視頻：http://v.eepw.com.cn/video/play/id/1920

測溫度用了平均值濾波法，下面介紹幾種常用的軟件濾波方法

1.平均值濾波法：連繼讀到幾個數值，求平均數。
       缺點：需要連續多次進行AD轉換，占用CPU資源
       技巧：讀8次，和右移3位就得到平均值，可省去除法運算

2.移動平均值濾波法：建立一個數組記錄數據，每進行一次AD  轉換后，把最新數據移入數組，把最舊的數據移出數組。再求平均值
       優點：節省CPU資源

3.去頭去尾求平均值：就像奧運比賽一樣，把最大最小的數據去除了，再求平均數。
       優點：把最大最小值去掉了，結果將更精確
   






下面是一些代碼，給大家參考一下，為了省時間，有很多代碼是系統生成的：


下面兩個子程序用于計算溫度：
/*
**-----------------------------------------------------------------------------
**
**  Abstract:
** This function stores the AD conversion results and calculates the temperature.
**
**  Parameters:
** None
**
**  Returns:
** None
**
**-----------------------------------------------------------------------------
*/
void ADC_Calculation_Temp(void)
{
    unsigned char i;
    unsigned short TempBuffer;
    g_temp_adcvalue=0x0000;
    for(i=0;i<8;i++)
    {
      ADS = _80_AD_INPUT_TEMPERSENSOR_0;
      AD_Start();
      /* Wait for the A/D conversion to complete */
      while(ADIF == 0);
      /* Clear ADC interrupt flag */
      ADIF = 0;
      AD_Read(&TempBuffer);                            // Store the conversion result in TempBuffer
      g_temp_adcvalue = + TempBuffer;
    }
    g_temp_adcvalue >>=3;                             // Get average
    temp = (float) 1.44 / g_ref_hexvalue;
    g_temperature = (float) (25 - ((((g_temp_adcvalue * temp) - 1) * 1000) / 3.6));      // Calculate the temperature value in 癈
    TempBuffer=(unsigned short)(g_temperature*10);    
    TXBuffer[0]=CMD_SETTING;       //command
    TXBuffer[1]=CMD_SEND_TEMPERATURE;      //command
    TXBuffer[2]=0x31;        //channel

    TXBuffer[3]=(unsigned char)(TempBuffer/100)+0x30;                           //Change the temperature to BCD
    TXBuffer[4]=(unsigned char)(TempBuffer%100/10)+0x30;
    TXBuffer[5]='.';
    TXBuffer[6]=(unsigned char)(TempBuffer%10)+0x30;
    TXBuffer[7]='C';
    TXBuffer[8]=CMD_END_DATA;
    UartTX(&TXBuffer[0]);                                                     //Send data to computer via UART2
    while(TXStatus!=TX_FINISH);
}

/*
**-----------------------------------------------------------------------------
**
**  Abstract:
** This function stores the AD conversion results and calculates the reference voltage.
**
**  Parameters:
** None
**
**  Returns:
** None
**
**-----------------------------------------------------------------------------
*/
void ADC_Calculation_Ref(void)
{
    unsigned char i;
    unsigned short TempBuffer;
    g_ref_hexvalue=0x0000;
    for(i=0;i<8;i++)
    {
      ADS = _81_AD_INPUT_TEMPERSENSOR_1;               //select internal temperature sensor
      AD_Start();
      /* Wait for the A/D conversion to complete */
      while(ADIF == 0);  
      /* Clear ADC interrupt flag */
      ADIF = 0;
      AD_Read(&TempBuffer);                            // Store the conversion result in TempBuffer
      g_ref_hexvalue = + TempBuffer;
    }
    g_ref_hexvalue >>=3;                               //get average
}


下面是串口發送數據及中斷程序：


void UartTX(unsigned char *p)
{
        TXStatus=TX_START;
        SRMK2 = 1U;   /* Disable Reception Interrupt */
        SREMK2 = 1U;         /* Disable Reception error Interrupt */
        TXPointer=p;
        STMK2 = 1U; /* disable INTST0 interrupt */
        TXD2=*TXPointer++;                  // Send System on msg to host computer
        TXCount=1;
        STIF2 = 0U; /* clear INTST2 interrupt flag */
        STMK2 = 0U; /* enable INTST0 interrupt */
}

/*
**-----------------------------------------------------------------------------
**
**  Abstract:
** This function is INTST2 interrupt service routine.
**
**  Parameters:
** None
**
**  Returns:
** None
**
**-----------------------------------------------------------------------------
*/
#pragma vector = INTST2_vect
__interrupt void MD_INTST2(void)
{
    TXD2 = * TXPointer;                 // TX next character
    TXCount++;
    if (* TXPointer == CMD_END_DATA || TXCount==MAX_PACKET_LEN)              // TX over?
    {
          TXStatus=TX_FINISH;
          SRIF2 = 0U; /* clear INTSR2 interrupt flag */
          SRMK2 = 0U; /* enable INTSR2 interrupt */
          SREIF2 = 0U; /* clear INTSRE2 interrupt flag */
          SREMK2 = 0U; /* enable INTSRE2 interrupt */
          STMK2 = 1U; /* disable INTST0 interrupt */
    }
    TXPointer++;
}

配合RFP通過串口數錄程序

1.IAR中的設置如下，生成hex文件


2.打開RFP程序，設置如下，并進行程序燒錄


注意：J6/J7/J8/J9跳線冒設到1-2，燒完后設到2-3就可以正常運行了。