#include <msp430x14x.h>
char MST_Data = 0xAA,SLV_Data = 0xff;
unsigned char a[12];
unsigned char b[12];
#define SPI_ENABLE      P2OUT &=~0x08;
#define  SPI_DISABLE    P2OUT |=0x08;
unsigned char regdata[11]={0x02,0XaB,0x10,0x05,0x05,0x00,0x00,0x40,0xc3,0x01,0x03};//二通道心电测试信号，无呼吸0x02,0xeb,0x18,0x00,0x00,0x30,0x0f,0x40,0x02,0x01,0x03fCLK = 512 kHz

void Delay_ms(unsigned int n)
{
  unsigned int l,m;
  for(l=0;l<n;l++)
    for(m=0;m<1000;m++);
}
void Stop_Read_Data_Continuous (void)
{
    unsigned int i=0;
    SPI_ENABLE;                            // /CS enable
    for(i=0;i<10;i++);
    while (!(IFG2&UTXIFG1));                 // Wait for TXBUF ready
    TXBUF1 =0x11;                              // Send SDATAC
    SPI_DISABLE;         // /CS disable
    for(i=0;i<10;i++);
}

void Start_Read_Data_Continuous (void)
{
    unsigned int i=0;
    SPI_ENABLE;
     for(i=0;i<10;i++);
    while (!(IFG2&UTXIFG1));                  // Wait for TXBUF ready
    TXBUF1 =0x10;                              // Send RDATAC
    SPI_DISABLE;
    for(i=0;i<10;i++);
}

void SPI_RegRead(unsigned char addr, unsigned char *buffer, unsigned char count)   
{   
  unsigned int i=0,j=0;
  Stop_Read_Data_Continuous ();     //When in RDATAC mode, the RREG command is ignored.Send SDATAC MUST BE SENT
   for(i=0;i<10;i++);
  SPI_ENABLE;                         // /CS enable
  for(j=0;j<10;j++);
  while (!(IFG2&UTXIFG1));                 // Wait for TXBUF ready
  TXBUF1 =addr|0x20;                         // Send address                
  while (!(IFG2&UTXIFG1));                 // Wait for TXBUF ready
  TXBUF1  = 0x00|(count-1);                        //  regedit count  
  
  for (i = 0; i<count;i++)   
  { 
   
    while (!(IFG2&UTXIFG1));                  // Wait for TXBUF ready    
    TXBUF1  = 0x00;                            //Initiate next data RX, meanwhile..
    Delay_ms(5);
    while (!(IFG2&URXIFG1));                  // Wait for TXBUF ready  
    buffer[i] =  RXBUF1;                    // Store data from last data RX
    TXBUF0= buffer[i];
    for(j=0;j<10;j++);
    
     
  }

  SPI_DISABLE;         // /CS disable
  for(i=0;i<10;i++); 
  Start_Read_Data_Continuous ();
  for(i=0;i<10;i++);
  
}   
void SPI_Regwrite(unsigned char addr,unsigned char *data,unsigned char count)   
{
  unsigned int i=0,j=0;
  Stop_Read_Data_Continuous ();
  SPI_ENABLE;                            // /CS enable
  while (!(IFG2&UTXIFG1));                 // Wait for TXBUF ready
  TXBUF1 =addr+0x40;   //发送地址信息;  首地址是0x01;(zhao)
  while (!(IFG2&UTXIFG1));                 // Wait for TXBUF ready
  TXBUF1 =count-1;  //发送header;              //发送的寄存器数量为10个（zhao）
  for (i = 0; i<count;i++)   
  {
    while (!(IFG2&UTXIFG1));                 // Wait for TXBUF ready
    TXBUF1 =data[i];   
    for(j=0;j<30;j++);
  }
  
  SPI_DISABLE;         // /CS disable
  Start_Read_Data_Continuous ();
 
}

void intSPI1()
{
  int i;
  P5SEL |= 0x0E;                            // P5.1,2,3 SPI option select
  P5OUT &= ~0x01;
  P5DIR |= 0x01;    
  
  BCSCTL1 &= ~XT2OFF;                       // XT2on

  do
  {
  IFG1 &= ~OFIFG;                           // Clear OSCFault flag
  for (i = 0xFF; i > 0; i--);               // Time for flag to set
  }
  while ((IFG1 & OFIFG));                   // OSCFault flag still set?

  BCSCTL2 |= SELM_2 + SELS;                 // MCLK = SMCLK = XT2 (safe)
  
  U1CTL = CHAR + SYNC + MM + SWRST;         // 8-bit, SPI, Master
  U1TCTL = CKPL + SSEL1 + STC;              // Polarity, SMCLK, 3-wire
  U1BR0 = 0x00;                             // SPICLK = SMCLK/2
  U1BR1 = 0x03;
  U1MCTL = 0x00;
  ME2 |= USPIE1;                            // Module enable
  U1CTL &= ~SWRST;                          // SPI enable
 
  IE2 |= URXIE1 ;                   // RX and TX interrupt enable
}

void intUART0()
{
  P3SEL |= 0x30;                            // P3.4,5 = USART0 TXD/RXD
  ME1 |= UTXE0 + URXE0;                     // Enable USART0 TXD/RXD
  UCTL0 |= CHAR;                            // 8-bit character
  UTCTL0 |= SSEL0;                          // UCLK = ACLK
  UBR00 = 0x03;                             // 32k/9600 - 3.41
  UBR10 = 0x00;                             //
  UMCTL0 = 0x4A;                            // Modulation
  UCTL0 &= ~SWRST;                          // Initialize USART state machine
  IE1 |= URXIE0;                            // Enable USART0 RX interrupt
}

void main( void )
{
  
  WDTCTL = WDTPW + WDTHOLD;       //关闭看门狗
  P1OUT = 0x00;
  P1IES |= 0x00;                 //上升沿触发
  P1IFG = 0x00;                  //中断标志位清零
  P1IE  |=0xff;                  //P1模块中断允许
  P2DIR |= 0x00f;                   //0,1,2,3输出
  P2OUT |=0x01;                     //START,RST高电平
 // P2OUT |=0x02;                     //START,RST高电平
  P5SEL = 0x020;                  //设置P3端口为SPI模式
  
  intSPI1();
  intUART0();
  Delay_ms(5);
 
 
  
  
  //SPI_RegRead(0x00,a,12); //读取初始寄存器，检验电路连接是否正确
  Delay_ms(5);  
  SPI_Regwrite(0x01,regdata,11);   //写入配置寄存器，
  Delay_ms(5);
  SPI_RegRead(0x00,b,12); // 再次读出寄存器   检验是否写入正确
  SPI_ENABLE;
    Delay_ms(5);
  P2OUT &=~0x02;
  Delay_ms(5);
  _EINT();
  while(1)
  {
  };
    //LPM0;                         //关CPU，进入低功耗模式
  
}

#pragma vector=UART0RX_VECTOR
__interrupt void usart0_rx (void)
{
   while (!(IFG1 & UTXIFG0));                // USART0 TX buffer ready?
                        // RXBUF0 to TXBUF0
  _BIC_SR_IRQ(LPM3_bits);                   // Clear LPM3 bits from 0(SR)
}

#pragma vector = PORT1_VECTOR      //P1中断服务子程序
__interrupt void P1_Interrupt(void)
{
  unsigned char i=0; 
  P2OUT |=0x02;                     //START,RST高电平
  if(P1IFG==0x01)
  {
    P1IFG=0;                    //清除标志位
     for(i=0;i<9;i++)
          { 
             while (!(IFG2&UTXIFG1));                  // Wait for TXBUF ready    
             TXBUF1  = 0x00;                            //Initiate next data RX, meanwhile..
             Delay_ms(2);
             while (!(IFG2&URXIFG1));                  // Wait for TXBUF ready  
             TXBUF0 = RXBUF1; ; 
            Delay_ms(2);
           
           
          }
    
  }
  else
    P1IFG=0;                    //清除标志位
}