msp430g2553AD10采样正弦波峰值

宇轩zzb

msp430g2553AD10采样正弦波峰值，显示的不是峰值，是一个特别小的数，单通道多次采样，谢谢大家
#include <msp430g2553.h>


#define uint unsigned int
#define uchar unsigned char


#define CS_H P2OUT|=BIT2
#define CS_L P2OUT&=~BIT2


#define SID_H P2OUT|=BIT1
#define SID_L P2OUT&=~BIT1


#define SCLK_H P2OUT|=BIT0
#define SCLK_L P2OUT&=~BIT0


uint aver[64]={0};
uchar flag=0;
uchar zifu[10]={"0123456789"};
uint maxaver=0;
uchar dis=0;
double max=0,maxr=0;


void delay(uchar z)
{
  uint x,y;
  for(x = 110;x>0;x--)
    for(y = z;y>0;y--);
}




void PORT_init()
{
  WDTCTL = WDTPW + WDTHOLD;
  P2DIR = 0XFF;
  P2OUT = 0XFF;
}


void Sys_init()
{
  uchar i;
  WDTCTL = WDTPW + WDTHOLD;
  BCSCTL1 = CALBC1_8MHZ;
  DCOCTL = CALDCO_8MHZ;//设置内部时钟8M
  do
  {
    IFG1 &= ~OFIFG;
    for(i = 0xff;i>0;i--);
  }
  while((IFG1 & OFIFG) != 0);
//  BCSCTL2 |= SELM_0;
//  BCSCTL2 |= DIVS_0;
}


void send_byte(uchar bbyte)
{
  uchar i,temp;
  for(i=0;i<8;i++)
  {
//    P2DIR = 0xff;
    temp = bbyte & 0x80;
    if(temp)
    {
      SID_H;
    }
    else
    {
      SID_L;
    }
    SCLK_L;
    SCLK_H;
    bbyte = bbyte<<1;
  }
}


void LCD12864_write_cmd(uchar ddata)
{
  uchar hdata,ldata;
  hdata = ddata & 0xf0;
  ldata = (ddata<<4) & 0xf0;
  CS_H;
  send_byte(0xf8);
  delay(5);
  send_byte(hdata);
  delay(1);
  send_byte(ldata);
  delay(1);
  CS_L;
}


void LCD12864_write_data(uchar ddata)
{
  uchar hdata,ldata;
  hdata = ddata & 0xf0;
  ldata = (ddata<<4) & 0xf0;
  CS_H;
  send_byte(0xfa);
  delay(5);
  send_byte(hdata);
  delay(1);
  send_byte(ldata);
  delay(1);
  CS_L;
}


void LCD12864_init()
{
  P2DIR |= BIT0 + BIT1 + BIT2;
  delay(10);
  CS_H;
  LCD12864_write_cmd(0x34);
  delay(1);
  LCD12864_write_cmd(0x30);
  delay(1);
  LCD12864_write_cmd(0x0c);//
  delay(1);
  LCD12864_write_cmd(0x01);
  delay(1);
  LCD12864_write_cmd(0x06);
  delay(1);
}


void LCD12864_pos(uchar x,uchar y)
{
  uchar pos;
  switch(x)
  {
  case 1:pos = 0x80;break;
  case 2:pos = 0x90;break;
  case 3:pos = 0x88;break;
  case 4:pos = 0x98;break;
  default:pos = 0x80;
  }
  pos += y;
  LCD12864_write_cmd(pos);
}






void shuju()
{
  uchar j;
  maxr = 0;
  maxaver = 0;
  for(j = 0;j < 64;j+=2)
  {
    if(aver[j]>maxaver && aver[j]<1024)
    {
      maxaver = aver[j];
    }
    maxr = (maxaver*3.56)/1023;
    max = maxr*1000;
    dis = max;
   
    LCD12864_pos(2,2);
    LCD12864_write_data(zifu[dis/10000]);
    LCD12864_write_data('.');
    LCD12864_write_data(zifu[dis/1000%10]);
    LCD12864_write_data(zifu[dis/100%10]);
    LCD12864_write_data(zifu[dis/10%10]);
    LCD12864_write_data(zifu[dis%10]);


  }
}


void ADC_init(void)
{
  ADC10CTL0 = ADC10ON + ADC10SHT_3 + MSC + ADC10IE;
  ADC10CTL1 |= CONSEQ_2 + INCH_1;
  ADC10AE0 |= BIT0 + BIT1;
  ADC10DTC1 = 0x20;
}


void main(void)
{
  WDTCTL = WDTPW + WDTHOLD;
// IO_init();
  LCD12864_init();
  PORT_init();
  Sys_init();
  ADC_init();
  _EINT();
  while(1)
  {
    ADC10CTL0 &=~ENC;
    while(ADC10CTL1 & ADC10BUSY);
    ADC10SA = (unsigned int)aver;
    ADC10CTL0 |= ENC + ADC10SC;
//   ADC10CTL0&=~ADC10IFG;


    _BIS_SR(CPUOFF + GIE);
  }
  
}


#pragma vector=ADC10_VECTOR
__interrupt void ADC10_ISR(void)
{
  shuju();
//  dis =ADC10MEM;
  _BIC_SR_IRQ(CPUOFF + GIE);
}

宇轩zzb

我以自己解决~嘿嘿，是输入没有弄好，下面是我的程序，供大家参考，少走弯路~
//输出接P1.0，不接则显示引脚悬空电压
#include <msp430g2553.h>

#define uint unsigned int
#define uchar unsigned char

#define CS_H P2OUT|=BIT2
#define CS_L P2OUT&=~BIT2

#define SID_H P2OUT|=BIT1
#define SID_L P2OUT&=~BIT1

#define SCLK_H P2OUT|=BIT0
#define SCLK_L P2OUT&=~BIT0

#define Number 128

static uint index = 0;
static uint result[Number];
uchar flag=0;
uchar zifu[10]={"0123456789"};
uint maxaver=0;
long dis=0;
double max=0,maxr=0;

void delay(uchar z)
{
  uint x,y;
  for(x = 800;x>0;x--)
    for(y = z;y>0;y--);
}



void Sys_init()
{
//  uchar i;
  WDTCTL = WDTPW + WDTHOLD;
  if(CALBC1_8MHZ==0XFF || CALDCO_8MHZ==0XFF)
  {
    while(1);
  }
  BCSCTL1 = CALBC1_16MHZ;
  DCOCTL = CALDCO_16MHZ;//设置内部时钟8M
// BCSCTL2 |= SELM_0;
  BCSCTL2 |= SELM_1 + DIVM_3;
}

void send_byte(uchar bbyte)
{
  uchar i,temp;
  for(i=0;i<8;i++)
  {
//    P2DIR = 0xff;
    temp = bbyte & 0x80;
    if(temp)
    {
      SID_H;
    }
    else
    {
      SID_L;
    }
    SCLK_L;
    SCLK_H;
    bbyte = bbyte<<1;
  }
}

void LCD12864_write_cmd(uchar ddata)
{
  uchar hdata,ldata;
  hdata = ddata & 0xf0;
  ldata = (ddata<<4) & 0xf0;
  CS_H;
  send_byte(0xf8);
  delay(5);
  send_byte(hdata);
  delay(1);
  send_byte(ldata);
  delay(1);
  CS_L;
}

void LCD12864_write_data(uchar ddata)
{
  uchar hdata,ldata;
  hdata = ddata & 0xf0;
  ldata = (ddata<<4) & 0xf0;
  CS_H;
  send_byte(0xfa);
  delay(5);
  send_byte(hdata);
  delay(1);
  send_byte(ldata);
  delay(1);
  CS_L;
}

void LCD12864_init()
{
  P2DIR |= BIT0 + BIT1 + BIT2;
  delay(10);
  CS_H;
  LCD12864_write_cmd(0x34);
  delay(1);
  LCD12864_write_cmd(0x30);
  delay(1);
  LCD12864_write_cmd(0x0c);//
  delay(1);
  LCD12864_write_cmd(0x01);
  delay(1);
  LCD12864_write_cmd(0x02);
  delay(1);
}

void LCD12864_pos(uchar x,uchar y)
{
  uchar pos;
  switch(x)
  {
  case 1:pos = 0x80;break;
  case 2:pos = 0x90;break;
  case 3:pos = 0x88;break;
  case 4:pos = 0x98;break;
  default:pos = 0x80;
  }
  pos += y;
  LCD12864_write_cmd(pos);
}

void LCD12864_write(uchar add,uchar *str)
{
  uchar k;
  LCD12864_write_cmd(add);
  for(k=0;k<*str;k++)
  {
    LCD12864_write_data(*str);
    str++;
  }
}

void IO_init()
{
  P1DIR &=~BIT0;
  P1REN |= BIT0;
  P2DIR = 0XFF;
  P2OUT = 0XFF;
}

void shuju()
{
  uchar j;
  maxr = 0;
  maxaver = 0;
  for(j = 0;j < 128;j++)
  {
    if((result[j]>maxaver) && (result[j]<1024))
    {
      maxaver = result[j];
    }
  }
    maxr = (maxaver*2.00)/1023;
    max = maxr*10000;
    dis = max;
   
    LCD12864_pos(2,2);
    LCD12864_write_data(zifu[dis/10000]);
    LCD12864_write_data('.');
    LCD12864_write_data(zifu[dis/1000%10]);
    LCD12864_write_data(zifu[dis/100%10]);
    LCD12864_write_data(zifu[dis/10%10]);
    LCD12864_write_data(zifu[dis%10]);

}

void ADC_init(void)
{
  ADC10CTL0 = ADC10ON + ADC10SHT_3 + MSC + ADC10IE + REF2_5V + REFON + SREF_1;
  ADC10CTL1 |= CONSEQ_2 + INCH_0 + ADC10DIV_3;
//  ADC10AE0 |= 0XFF;
// ADC10CTL0 &=~ADC10IFG;
// ADC10DTC1 = 0x40;
}

void main(void)
{
  WDTCTL = WDTPW + WDTHOLD;

  LCD12864_init();
  Sys_init();
  ADC_init();
  _EINT();
  
   LCD12864_pos(1,1);
   LCD12864_write(0x81,"采样结果：");
   LCD12864_write(0x99,"By:Watermelon");
  
  while(1)
  {
    ADC10CTL0 &=~ENC;
    while(ADC10CTL1 & ADC10BUSY);
    ADC10SA = result[index];
    ADC10CTL0 |= ENC + ADC10SC;//启动
    _NOP();
//   ADC10CTL0&=~ADC10IFG;

    _BIS_SR(LPM0_bits + GIE);
  }
  
}

#pragma vector=ADC10_VECTOR
__interrupt void ADC10_ISR(void)
{
  result[index++] = ADC10MEM;
// index += 1;
  if(index == 128)
  {
    shuju();
    index = 0;
}
  _NOP();

  ADC10CTL0 &=~ADC10IFG;
//  _BIC_SR_IRQ(CPUOFF + GIE);
}