main.c

利用MSP430F2274代触摸控制的及无线模块的演示程序

  _NOP();
  _NOP();
  _NOP();
  _NOP();
  _NOP();
  //Enable interrupt(High to Low trigger)
  //Set the Active Key input , and start the timed discharge of the pad
  P1IES |= Active_Key;
  P1IE |= Active_Key;
  P1DIR &= ~Active_Key;   

//capture TAR  
  Timer_Count = TAR;
  LPM0;
//Return the key to the driven low state, to contribute to the "ground" area 
//around the next key to be scanned.  
  P1IE &= ~Active_Key;                          //disable active key interrupt
  P1OUT &= ~Active_Key;                         //switch active key to low to discharge pad
  P1DIR |= Active_Key;                          //switch active key to output to save power     
  
  Sum = Timer_Count;
//
  _NOP();
  _NOP();
  _NOP();
  _NOP();
  _NOP();
  _NOP();
  
  P1OUT |= Partner_Key;
  
  _NOP();
  _NOP();
  _NOP();
  _NOP();
  _NOP();
  _NOP(); 
  //Enable interrupt(Low to High trigger)
  //Set the Active Key input , and start the timed charge of the pad
  P1IES &= ~Active_Key;
  P1IE |= Active_Key;
  P1DIR &= ~Active_Key;     
//capture TAR  
  Timer_Count = TAR;
  LPM0;
//Return the key to the driven low state, to contribute to the "ground" area 
//around the next key to be scanned.  
  P1IE &= ~Active_Key;                          //disable active key interrupt
  P1OUT &= ~Active_Key;                         //switch active key to low to discharge pad
  P1DIR |= Active_Key;                          //switch active key to output to save power     
  
  P1OUT &= ~Partner_Key; 

  Sum = Sum + Timer_Count;
  return (Sum >> 1);
}

/**************************************************************************************************
**函数名称：void touchkey_init(void)
**入口参数：无
**出口参数：无
**功能描述：初始化触摸按键
**************************************************************************************************/
void touchkey_init(void)
{ 
   BCSCTL1 = CALBC1_8MHZ;                              // DCO = 8MHZ
   DCOCTL = CALDCO_8MHZ;
   BCSCTL3 |= LFXT1S_2;                                // ACLK = VLO 

   P1OUT = 0X00;
   P1DIR |= BIT0 + BIT1 + BIT2 + BIT3 + BIT4 + BIT5;
   P1SEL = 0X00;       
   
   CCTL0 = CCIE;                                       // CCR0 中断使能
   CCR0 = 60000 - 1;   
   TACTL = TASSEL_2 + ID_2 + MC_2 + TACLR;             //SMCLK , Divider/4 , Continous Up , TAR Clear   
   
   _EINT();   
   char i,j; 
   for(i=0;i<5;i++)
   {
     for(j=0;j<4;j++)
     {
	     Key_Capacitance_Basic[i]+=measure_key_capacitance(i);
	     _NOP();
     }	
     Key_Capacitance_Basic[i]>>=2;
  } 
}

/**************************************************************************************************
**函数名称：int scan_key(char key, char times)
**入口参数：key:   当前扫描按键的编号
**出口参数：times: 当前按键扫描的次数
**功能描述：判断扫描按键是否按下
**************************************************************************************************/
int scan_key(char key, char times)
{
  unsigned char j;
  int press=0,rise=0,equ=0,down=0;
  
  for(j=0 ; j<times ; j++)
  {
    Key_Capacitance_Filter[key] = measure_key_capacitance(key) - Key_Capacitance_Basic[key];
    if(Key_Capacitance_Filter[key] > Max_Key_Threshold)
    {
      press++;
    }
    else if(Key_Capacitance_Filter[key] > 0)
    { 
      rise++;
    }
    else if(Key_Capacitance_Filter[key]==0)
    {
	    equ++;
    }
    else if(Key_Capacitance_Filter[key] < 0)
    {
      down++;
    }
  }
  
  if(press>=times/2)
  {
    return 2;
  }
  
  if(rise>=times/2)
  {
    return 1;
  }
  
  if((down>=times/2))
  {
    return -1;
  } 
  return 0;
}

/**************************************************************************************************
**函数名称：unsigned char scan_result(void)
**入口参数：无
**出口参数：当前按下的按键值
**功能描述：扫描按键键值
**************************************************************************************************/
unsigned char scan_result(void)
{
  unsigned char i,key_buffer=0;
  int key_value=0;  
  for(i=0;i<5;i++)
  {
   key_value=scan_key(i,4);
   switch(key_value)
   {
   	case 2:
     		key_buffer |=(0x01<<i);
		break;
   	case 1: 
	  	key_rise_times[i]++;
		break;
   	case -1:
	  	key_down_times[i]++;
		break;
   	default:
	  	break;
   }
  _NOP();    
  }
  _NOP();
  return key_buffer;
}

/**************************************************************************************************
**函数名称：void cap_adjust(void)
**入口参数：无
**出口参数：无
**功能描述：扫描按键键值
**************************************************************************************************/
void cap_adjust(void)
{
  unsigned char i;
  static char scan_times = basic_cap_adjust_cycle;
  if(--scan_times==0)
  {
    scan_times=basic_cap_adjust_cycle;
    for(i=0;i<Num_Of_Key;i++)
    {
	    if(key_rise_times[i]>(basic_cap_adjust_cycle>>1))	//when 3/4 total times of key scan 
	    {
	      Key_Capacitance_Basic[i]++;
	    }	  
	    if(key_down_times[i]>(basic_cap_adjust_cycle>>1))
	    {
	      Key_Capacitance_Basic[i]--;	  
	    }
	    key_rise_times[i]=0;
	    key_down_times[i]=0;
    } 
    _NOP();
  }
}

/**************************************************************************************************
**函数名称：__interrupt void port_1_interrupt(void)
**入口参数：无
**出口参数：无
**功能描述：触摸按键电容放电IO口中断服务函数
**************************************************************************************************/
#pragma vector=PORT1_VECTOR
__interrupt void port_1_interrupt(void)
{
  P1IFG = 0;                                      // clear flag
  Timer_Count = TAR - Timer_Count;                // find the discharge time
  LPM0_EXIT;
}

/**************************************************************************************************
**函数名称：__interrupt void port2_ISR (void)
**入口参数：无
**出口参数：无
**功能描述：CC2500无线数据接收中断服务函数
**************************************************************************************************/
#pragma vector=PORT2_VECTOR
__interrupt void port2_ISR (void)
{ 
  char len=16;
  if(TI_CC_GDO2_PxIFG & TI_CC_GDO2_PIN)
  {   
    if(system_state&flg_rx_state)                        //rx inter
    {
      if (RFReceivePacket(&rxBuffer[0],&len))       // Fetch packet from CCxxxx
      {
        system_state |= flg_rx_finished; 
        LPM0_EXIT; 
      }
    } 
    TI_CC_GDO2_PxIFG &=~ TI_CC_GDO2_PIN;   
  }   
  P2IFG = 0;   
}

/**************************************************************************************************
**函数名称：__interrupt void Timer_A (void)
**入口参数：无
**出口参数：无
**功能描述：按键扫描间隔计数器中断服务函数
**************************************************************************************************/
#pragma vector=TIMERA0_VECTOR
__interrupt void Timer_A (void)
{
  CCR0 = CCR0 + 60000;  
  LPM0_EXIT;    
}

/**************************************************************************************************
**函数名称：__interrupt void Timer_A1 (void)
**入口参数：无
**出口参数：无
**功能描述：蜂鸣器延时定时器中断服务函数
**************************************************************************************************/
#pragma vector=TIMERA1_VECTOR
__interrupt void Timer_A1 (void)
{
  switch( TAIV )
  {
    case  2:                         // TACCR1 not used
       TACCTL1 &= ~CCIE;      // CCR1 interrupt enabled
       BEEP_OFF;
       break; 
    case  4: break;                         // TACCR2 not used
    case 10: break;                 // overflow
  }
}