瑞萨单片机+TN905非接触式红外感应体温计(源程序电路图全套资料)

ID:885683 · 发表于 2021-2-22 22:28

红外测温模块选用 ZyTemp 公司的 TN905 红外测温模块，其测温原理应用斯特凡-玻尔兹曼定律和维恩位移定律，是一种集成的红外探测器， TN905 模块采用 3V 供电，数字输出接口为 SPI 接口。

电路原理图如下：

单片机源程序如下:

/***********************************************************************/
/* */
/* FILE :Main.c */
/* DATE : */
/* DESCRIPTION :Main Program */
/* CPU TYPE : */
/* */
/* NOTE:THIS IS A TYPICAL EXAMPLE. */
/* */
/***********************************************************************/
/******************************************************************************
Includes <System Includes> , "Project Includes"
******************************************************************************/
#include "iodefine.h"
#include "userdefine.h"
#include "system.h"
#include "lcd.h"
#include "sensor.h"
#include "key_led_buzzer.h"
#include "ad.h"
#include "e2prom.h"
#include "timer.h"
/******************************************************************************
Macro definitions
******************************************************************************/
#define ALARM_DEGREE 3700 /* Body temperature alarm value 37 degree Celsius */
/******************************************************************************
Global Variables
******************************************************************************/
_Bool g_AlarmFlag; /* g_AlarmFlag is true if body "temperature > ALARM_DEGREE" */
uint8_t g_RunMode; /* MCU run mode:MODE_WAIT,MODE_READY,MODE_SETTING,MODE_SET_FINISH,MODE_MEASURE,MODE_CALCULATE,MODE_DISPLAY */
uint8_t g_MeasureMode; /* Measure mode: object temperature or ambiant temperature */
uint8_t g_AlarmCounter; /* Alarm counter if body "temperature > ALARM_DEGREE" */
uint8_t g_WaitCounter; /* Wait counter, MCU will enter halt mode if no any action after 30s */
uint8_t g_SetData; /* Temperature calibration data */
uint8_t g_ObjectTemp[5]; /* Object temperature original data */
uint8_t g_AmbiantTemp[5]; /* Ambiant temperature original data */
uint8_t *g_DataPoint; /* Data point for temperature data */
uint8_t g_DataNum; /* Temperature data counter */
uint8_t g_ObjCount; /* Object temperature calculate data counter */
uint8_t g_AmbiCount; /* Ambiant temperature calculate data counter */
uint32_t g_ObjectData; /* Object temperature calculate data */
uint32_t g_AmbiantData; /* Ambiant temperature calculate data */
uint32_t g_ObjectDataTemp[5]; /* Object temperature calculate data array for average */
uint32_t g_AmbiantDataTemp[5]; /* Ambiant temperature calculate data array for average */
uint32_t g_DisplayData; /* Temperature data for LCD display */
/******************************************************************************
Extern global Variables defined in other files
******************************************************************************/
extern uint8_t g_KeyEnable;
extern uint8_t g_KeyStatus;
extern uint8_t g_KeyOldStatus;
extern uint8_t g_KeyReturn;
extern uint8_t g_aDataBuffer[];
/******************************************************************************
Private Function Prototypes
******************************************************************************/
static uint32_t Calculate_Temperature( uint32_t * DataPoint);
static void ModeTransferByKey(void);
/******************************************************************************
* Function Name : main
* Description : main loop.
* Arguments : none
* Return Value : none
******************************************************************************/
void main(void)
{
/* Local variables */
uint8_t t_tempdata;
/* Initialize global variables */
g_RunMode = MODE_READY; /* Initial run mode */
g_MeasureMode = MEASURE_OBJ; /* Initial measure mode */
g_AlarmFlag = FALSE; /* Alarm flag is set to 0 */
/* System initialize */
System_Init();
/* Get temperature calibration data*/
EEPROM_ReadRandom(0x0000,0x01,g_aDataBuffer);
g_SetData = g_aDataBuffer[0];
/* Main loop */
while(1)
{
/* Transfer run mode according to pressing key */
ModeTransferByKey();
/* Run mode handle */
switch( g_RunMode )
{
case MODE_WAIT:
LCD_Stop(); /* Close LCD display brefore enter to halt mode */
__halt(); /* Enter to halt mode */
break;
case MODE_READY:
LCD_Start();
break;
case MODE_SETTING:
BLON = 1; /* Blink LCD when calibration data is setting */
break;
case MODE_SET_FINISH:
BLON = 0; /* Close blink LCD when calibration data setting is finished */
EEPROM_WriteByte(0x0000, g_SetData); /* Get calibration data */
/* Transfer to MODE_READY after MODE_SET_FINISH */
g_RunMode = MODE_READY;
break;
case MODE_MEASURE: /* Get the original data of temperature */
{
t_tempdata = g_ObjectTemp[0] + g_ObjectTemp[1] + g_ObjectTemp[2];
if ( (g_ObjectTemp[0] == 0x4c) && (g_ObjectTemp[4] == 0x0D) && (t_tempdata == g_ObjectTemp[3]) )
{
g_ObjectData = g_ObjectTemp[1];
g_ObjectData = ( g_ObjectData<<8 ) + g_ObjectTemp[2];
g_ObjectData *= 100;
g_ObjectData = ( g_ObjectData/16 - 27315 );
g_ObjectDataTemp[g_ObjCount] = g_ObjectData;
g_ObjCount++;
if( g_ObjCount > 4 ) /* Get data 5 times */
{
g_RunMode = MODE_CALCULATE;
g_ObjCount = 0;
}
}
t_tempdata = g_AmbiantTemp[0] + g_AmbiantTemp[1] + g_AmbiantTemp[2];
if ( (g_AmbiantTemp[0] == 0x66) && (g_AmbiantTemp[4] == 0x0D) && (t_tempdata == g_AmbiantTemp[3]) )
{
g_AmbiantData = g_AmbiantTemp[1];
g_AmbiantData = ( g_AmbiantData<<8 ) + g_AmbiantTemp[2];
g_AmbiantData *= 100;
g_AmbiantData = ( g_AmbiantData/16 - 27315 );
g_AmbiantDataTemp[g_AmbiCount] = g_AmbiantData;
g_AmbiCount++;
if( g_AmbiCount > 4 ) /* Get data 5 times */
{
g_RunMode = MODE_CALCULATE;
g_AmbiCount = 0;
}
}
}
break;
case MODE_CALCULATE: /* Calculate the real data of temperature */
if( g_MeasureMode == MEASURE_OBJ )
g_DisplayData = Calculate_Temperature( g_ObjectDataTemp );
else
g_DisplayData = Calculate_Temperature( g_AmbiantDataTemp );
/* Adjust temperature according to setting data */
if( g_SetData >= 0x80)
/* Calibration data is minus if data >= 0x80 */
g_DisplayData = g_DisplayData - (uint16_t)( (g_SetData&0x7f)*10);
else
/* Calibration data is plus if data > 0x80 */
g_DisplayData = g_DisplayData + (uint16_t)( (g_SetData&0x7f)*10);
if( g_MeasureMode == MEASURE_OBJ )
{
/* g_AlarmFlag is true if body "temperature > ALARM_DEGREE" */
if( g_DisplayData > ALARM_DEGREE )
g_AlarmFlag = TRUE;
}
g_RunMode = MODE_DISPLAY;
break;
}
/* LCD display process */
Display_Process();
}
}
/******************************************************************************
End of function main
******************************************************************************/
/******************************************************************************
* Function Name : Calculate_Temperature
* Description : This function calculate the real temperature.
* Arguments : none
* Return Value : uint32_t-
the temperature data*100(for example: 3200 means 32 Celsius degree)
******************************************************************************/
static uint32_t Calculate_Temperature( uint32_t * DataPoint)
{
/* Local variables */
uint8_t i = 0;
uint32_t t_max_data,t_min_data;
uint32_t t_TempData;
t_max_data = *DataPoint;
t_min_data = *DataPoint;
t_TempData = 0;
while(i++ < 5)
{
if( *DataPoint > t_max_data )
t_max_data = *DataPoint;
if( *DataPoint < t_min_data )
t_min_data = *DataPoint;
t_TempData += *DataPoint;
DataPoint++;
}
/* Get the average value after delete the max data and min data */
t_TempData = ( t_TempData - t_max_data - t_min_data );
t_TempData = t_TempData/3;
return(t_TempData);
}
/******************************************************************************
End of function Calculate_Temperature
******************************************************************************/
/******************************************************************************
* Function Name : ModeTransferByKey
* Description : This function enter run mode according to pressing key.
* Arguments : none
* Return Value : none
******************************************************************************/
static void ModeTransferByKey(void)
{
/* Key handle when confirm key is pressed */
if(g_KeyEnable == KEY_PRESS)
{
if(g_KeyReturn == KEY_GAUGE)
{
if( g_RunMode != MODE_SETTING) /* Enter MODE_MEASURE if gauge key is pressed not in setting mode */
{
g_RunMode = MODE_MEASURE;
g_WaitCounter = 0;
BUZZER = LOW; /* Buzzzer on when press "measure" key */
LED = HIGH; /* LED on when press "measure" key */
}
else
g_RunMode = MODE_SET_FINISH;
}
if(g_KeyReturn == KEY_OBJECT)
{
if( g_RunMode != MODE_SETTING)
{
g_MeasureMode = MEASURE_OBJ; /* Enter to MEASURE_OBJ mode */
}
else
{
/* Calibration data -1 in setting mode */
g_SetData--;
}
}
if(g_KeyReturn == KEY_AMBIANT)
{
if( g_RunMode != MODE_SETTING)
{
g_MeasureMode = MEASURE_AMBI;
}
else
{
/* Calibration data +1 in setting mode */
g_SetData++;
}
}
g_KeyEnable = KEY_RELEASE; /* Release key staus after key handling */
}
}
/******************************************************************************
End of function ModeTransferByKey
******************************************************************************/

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瑞萨单片机+TN905非接触式红外感应体温计(源程序电路图全套资料)

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