code.c

上臂袖带式电子血压计的单片机处理程序和设计说明

	} 
	
}
//***********************************************
void deflatestate(void)
{                                         
    /*if(timedeflate >= 1900)
    {   
         PORTD = 0;
         if(timedeflate >= 2000)
         {
         	PORTD = 0x02;
         	timedeflate = 0;
         }
    }*/
	if((~PINB & 0x02) && (timepress1 > 30)) Maybe1 = 1;
	if(Maybe1 && (PINB == 0xff))
	{
		lcd_clear();
		lcd_gotoxy(0,0);
		lcd_putsf("Emergency Stop");                  
		sprintf(lcd_output,"%-i",(int)pressure);
	    lcd_gotoxy(0,1);
	    lcd_puts(lcd_output);
		//turn off motor and open the valve
		PORTD=0;
		currentState = resetState;
		Maybe1 = 0;
		timepress1 = 0;                            
    }
	//if(done) --> Display state
	if(currentState==deflateState) pressuremeasure(); //if still deflating, measure everything
}

//***********************************************
void display_state(void)
{   
     
if(timedisplay<=1000)
{
    if(timecount>=200)
	{
	lcd_clear();
    timecount=0;
	lcd_gotoxy(0,0);
	lcd_putsf("Sys"); 
	lcd_gotoxy(7,0);
	lcd_putsf("Dias");
	lcd_gotoxy(15,0);
	lcd_putsf("HR");                     
	sprintf(lcd_output,"%-i",(int)systolic);
	lcd_gotoxy(0,1);
	lcd_puts(lcd_output);  
	
	sprintf(lcd_output,"%-i",(int)diastolic);
	lcd_gotoxy(7,1);
	lcd_puts(lcd_output); 
	
	sprintf(lcd_output,"%-i",(int)pulse_per_min);
	lcd_gotoxy(14,1);
	lcd_puts(lcd_output);  
	} 
}

else if (timedisplay>1000&&timedisplay<2000)
{	
	if(timecount>=200)
	{	lcd_clear();
        timecount=0;
        
		lcd_gotoxy(0,0);
		lcd_putsf("Black: Resume"); 
	
	}  
}

else
{
    timedisplay=0;
}	
	
	if((~PINB & 0x04) && (timepress2 > 30)) Maybe2 = 1;
	if(Maybe2 && (PINB == 0xff))
	{
		lcd_clear();       
		lcd_gotoxy(0,0);
		lcd_putsf("White: Start");
		lcd_gotoxy(0,1);
		lcd_putsf("Grey: Stop");
		currentState = startState;
		timepress2 = 0;         
		Maybe2=0; 
		systolic=0;
		diastolic=0;
		pulse_per_min=0;
	
	} 
	   
}
//***********************************************
void reset_state(void)
{   
if(timedisplay<=1000)
{
    if(timecount>=200)
	{   timecount=0;
     	lcd_clear();
		lcd_gotoxy(0,0);
		lcd_putsf("Emergency Stop"); 
	} 
}

else if (timedisplay>1000&&timedisplay<2000)
{	
	if(timecount>=200)
	{	lcd_clear();
        timecount=0;
        
		lcd_gotoxy(0,0);
		lcd_putsf("Black: Resume"); 
	
	}  
}

else
{
    timedisplay=0;
}	          
	if((~PINB & 0x04) && (timepress2 > 30)) Maybe2 = 1;
	if(Maybe2 && (PINB == 0xff))
	{
		lcd_clear();       
		lcd_gotoxy(0,0);
		lcd_putsf("White: Start");
		lcd_gotoxy(0,1);
		lcd_putsf("Grey: Stop");
		currentState = startState;
		timepress2 = 0;
		Maybe2=0; 
	}
	
}
//***********************************************
// Function to measure everything
//------------------------------------------------
void pressuremeasure(void)
{
 switch (meas_state)
 	{	  
 	    case Sys_Measure:
 	    	 if(timing==0) sysmeasure(); //sampling signal at 40msec
 	    	 break;
 	    	 
 	    case Sys_Cal:
 	         if(timing==0) syscal();
 	         break;
 	         
 	    case Rate_Measure:
 	    	 if(timing==0) ratemeasure();
 	    	 break;
 	    
 	    case dias_Measure:
 	    	 diasmeasure();
 	    	 break;
 	    	 
 	    case dias_Cal:
 	    	 diascal();
 	    	 break;
 	    	
    } //switch
    
}//pressuremeasure
//*********************************************************
void sysmeasure(void)
{
	if(timing==0)
		{ADMUX = 0b00100000; //choose ADC0 for reading AC
		
        //enable ADC and set prescaler to 1/128*16MHz=125,000
        //and set interupt enable
        //and start a conversion
        ADCSR = 0b11001111;
        
        } 
         if(sys_count>=6)
         { 
         meas_state = Sys_Cal;
         timecount=0;
         }
        
        if(timecount>=200)
        {  
        lcd_clear();
		lcd_gotoxy(0,0);
		lcd_putsf("Measuring");
        timecount=0;
        } 
}

//***********************************************************
//this function is to calculate systolic pressure
void syscal(void)
{
	
		ADMUX=0b00100001;//choose ADC1 for reading DC
		
		//enable ADC and set prescaler to 1/128*16MHz=125,000
        //and set interupt enable
        //and start a conversion
        ADCSR = 0b11001111; 
        
        if(timecount>=200)
        {  
        lcd_clear();
		lcd_gotoxy(0,0);
		lcd_putsf("Sys Cal");
        timecount=0;
        } 
        
        
}//syscal

//************************************************************
void ratemeasure(void)
{
	
		ADMUX=0b00100000; //choose ADC0 for reading AC
		
		//enable ADC and set prescaler to 1/128*16MHz=125,000
        //and set interupt enable
        //and start a conversion
        ADCSR = 0b11001111;
        //calculate the mean of pulse rate
 	    if(count_average==5)
 	    {
 	     pulse_period = total_pulse_period/5000;
 	     pulse_per_min= 60/pulse_period;  
 	     
 	    lcd_clear();
		lcd_gotoxy(0,0);
		lcd_putsf("Pulse Rate");    
	    sprintf(lcd_output,"%-i",(int)pulse_per_min);
        lcd_gotoxy(0,1);
        lcd_puts(lcd_output); 
        
 	     meas_state = dias_Measure;
 	     //then set timerun_dias=0
 	     //also reset count_average for the next operation
 	     count_average=0;
 	     timerun_dias=0;
 	    }  
}
//************************************************************
void diasmeasure(void)
{
		ADMUX=0b00100000;//choose ADC1 for reading AC
		
		//enable ADC and set prescaler to 1/128*16MHz=125,000
        //and set interupt enable
        //and start a conversion
        ADCSR = 0b11001111; 
      
          
       
        
        
}//dias measure
//*************************************************************

void diascal(void)
{
		ADMUX=0b00100001;//choose ADC1 for reading DC
		
		//enable ADC and set prescaler to 1/128*16MHz=125,000
        //and set interupt enable
        //and start a conversion
        ADCSR = 0b11001111;  
        
        if(timecount>=200)
        {
        lcd_clear();
		lcd_gotoxy(0,0);
		lcd_putsf("Dias_Cal");    
        timecount=0;
        } 

}

void initialize(void)   
{                       
    
    
	//Initialize LCD
	timecount=0;    
	lcd_init(LCDwidth);      
	lcd_clear();       
	lcd_gotoxy(0,0);
	lcd_putsf("White: Start");
	lcd_gotoxy(0,1);
	lcd_putsf("Grey: Stop");
	
	//set up timer0
    TIMSK =2; //turn on timer 0 comp match
    OCR0 = 250; //set the compare register to 250
 
    //prescaler to 64 and turn on clear-on-match
    TCCR0 = 0b00001011;
    timepress0 = 0;
    timepress1 = 0;     
  
    
                        
    DDRB=0x00; //PORT B is an input(2 buttons)
    DDRD=0xff; //PORT D is an output(motor control); 
    PORTD=0x00; 
    PORTB=0xff;
    PORTA=0x00;       
    
    maxpressure = 160; 
    meas_state = Sys_Measure; 
    former=TH_sys-0.01;


	TH_sys=4.0;
	TH_rate = 2.5;
	TH_dias = 4.8;
	timerun_dias=0;
	time_pulse=0;
	timerate=0;

	timing=40;
	timedisplay=0;

	total_pulse_period=0;
	systolic=0;
	diastolic=0;
	pulse_per_min=0;
	Vref=5.0;          
	

	sys_count=0;
	count_average=0;
	countpulse=0;
	                   
	DC_gain=213;
	
	accum_data=0; 
	press_data=0; 
    count=0;


	#asm
	sei
	#endasm
}