我想采集10次AD测量结果，然后在取平均值。我现在选用的单通道多次采样，采样结束ADC12CTL0&=~ADC12SC；但是当进入采样中断后就出不来了，可以一直采样，就根本停不下来。
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我想采集10次AD测量结果，然后在取平均值。我现在选用的单通道多次采样，采样结束ADC12CTL0&=~ADC12SC；但是当进入采样中断后就出不来了，可以一直采样，就根本停不下来。
#include<msp430x14x.h>
#include"HR202.c"
#define CPU_F ((double)8000000)
#define delay_us(x) __delay_cycles((long)(CPU_F*(double)x/1000000.0))
#define delay_ms(x) __delay_cycles((long)(CPU_F*(double)x/1000.0))
#define HR202_CONTR1_OUT P1DIR |=BIT3 //湿敏电阻
#define HR202_CONTR1_CLR P1OUT &=~BIT3
#define HR202_CONTR1_SET P1OUT |=BIT3
#define HR202_CONTR1_RD P1DIR &=~BIT3
#define HR202_CONTR2_OUT P1DIR |=BIT1 //标准电阻
#define HR202_CONTR2_CLR P1OUT &=~BIT1
#define HR202_CONTR2_SET P1OUT |=BIT1
#define HR202_CONTR2_RD P1DIR &=~BIT1
#define HR202_CONTR0_OUT P1DIR |=BIT0 //热敏电阻
#define HR202_CONTR0_CLR P1OUT &=~BIT0
#define HR202_CONTR0_SET P1OUT |=BIT0
#define HR202_CONTR0_RD P1DIR &=~BIT0
int count=0;
//int result[10];
int result;
int AICnt=0;
float value=0.0,vout,R;
int humid;
int n=0,number=0;
void ADC12Init()
{
ADC12CTL0 &=~ENC; //一定要置0
ADC12CTL0=ADC12ON+SHT0_8+REFON+REF2_5V+MSC; // 3V3 GND REFON+REF2_5V可有可无
ADC12CTL1=ADC12SSEL_2+SHP+CONSEQ_2+CSTARTADD_1+SHS_0;
ADC12MCTL1=SREF_1+INCH_1+EOS; //电路正端接入3V3，负端接GND时必须不写SREF_1
ADC12IE=0X0002; //IE中断共16位
_EINT();
}
void Init_TimerA() //定时器每100us进入中断
{
TACTL=TASSEL_2+MC_1;
TACCTL0 = CCIE;
CCR0 =50000;
}
#pragma vector=ADC_VECTOR
__interrupt void ADC12IRQ (void)
{
for(AICnt=0;AICnt<10;AICnt++)
{
result[AICnt]=ADC12MEM1;
value=value+result[AICnt];
//value=value+result[AICnt];
}
//value=ADC12MEM1;
value=value/10;
vout=(3.3/4096)*value;
R=(3.3-vout)/vout*10;
ADC12CTL0 &=~ENC; //完成一组数据采集 关闭ADC
ADC12CTL0 &=~ADC12ON;
count=1;
}
void HR202_shidu(void) //100us定时器中断调用函数
{
HR202_CONTR0_RD;
HR202_CONTR1_OUT; //
HR202_CONTR2_OUT; //
HR202_CONTR2_SET;//Rf 1
HR202_CONTR1_CLR;//Rh 0
delay_us(500);
HR202_CONTR2_CLR;//Rf 0
HR202_CONTR1_SET;//Rh 1
delay_us(200);
ADC12CTL0 |=ENC+ADC12SC; //开启ADC
delay_us(300);
while(count==0);
humid=shidu(28,R);
count=0;
}
void main()
{
WDTCTL = WDTPW+WDTHOLD;
ADC12Init();
Init_TimerA();
P6SEL |=0X02;
_EINT();
while(1)
{
_NOP();
}
}
void HR202_wendu(void)
{
HR202_CONTR1_RD;
HR202_CONTR2_OUT;
HR202_CONTR2_SET;
HR202_CONTR0_OUT;
HR202_CONTR0_CLR;
ADC12CTL0 |=ENC+ADC12SC;
}
#pragma vector=TIMERA0_VECTOR
__interrupt void Timer_A0()
{
_EINT();
number++;
if(number==5)
{
TACCTL0 &=~CCIE;
_EINT();
switch(n%2)
{
case 0:
ADC12CTL0 |=ADC12ON;
HR202_shidu();
break;
case 1:
}
n++;
number=0;
}
}
你好，
你描述的问题是程序一直在中断里面执行吗？
断点打在里面可以停住吗？
下面的程序是TI的参考代码，希望对你有帮助：
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//*****************************************************************************
// MSP-FET430P140 Demo - ADC12, Single Channel Rpt Mode, TA1 as Sample Trigger
//
// Description: Sample and convert A0 using Timer_A as sample trigger in
// Pulse Sample mode. Put "Num_of_Results" ADC12MEM0 values in results[]
// and Light LED (P1.0) when done.
//
// MSP430F149
// ---------------
// | |
// Vin -->|P6.0/A0 |
// | |
//
// H. Grewal
// Texas Instruments Inc.
// Feb 2005
// Built with CCE Version: 3.2.0 and IAR Embedded Workbench Version: 3.21A
//*****************************************************************************
#include <msp430.h>
#define Num_of_Results 512
int results[Num_of_Results] = {0};
void ADC_Init(void);
int main(void)
{
WDTCTL = WDTPW | WDTHOLD; // Disable the Watchdog.
ADC_Init(); // Initialize ADC12
ADC12CTL0 |= ENC; // Start conversion
__bis_SR_register(LPM0_bits); // Enter LPM0
}
void ADC_Init(void)
{
P1DIR = 0xff; // set port to outputs
P1OUT = 0; // reset port outputs
P6SEL |= 0x01; // select A0 input
ADC12CTL0 = ADC12ON+SHT0_1+REF2_5V+REFON; // Setup ADC12
ADC12CTL1 = SHP+CONSEQ_2+SHS_1; // Timer triggers sampling
ADC12MCTL0 = INCH_0 + SREF_1;
ADC12IE = 0x0001; // Enable ADC12IFG.0
TACCR0 = 1500; // Delay to allow Ref to settle
TACCTL0 |= CCIE; // Compare-mode interrupt.
TACTL = TASSEL_1 | MC_1; // TACLK = ACLK, Up mode.
__bis_SR_register(LPM3_bits + GIE); // Wait for delay, Enable interrupts
TACCTL0 &= ~CCIE; // Disable timer
P2SEL |= BIT3; // Set for Timer A1
P2DIR |= 0x08;
TACCR0 = 7; // Init TACCR0 w/ sample prd=CCR0+1
TACCR1 = 4; // Trig for ADC12 sample & convert
TACCTL1 = OUTMOD_3; // Set/reset
TACTL = TACLR | MC_1 | TASSEL_1; // ACLK, clear TAR, up mode
}
// Timer_A0 Interrupt Service Routine
#if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
#pragma vector=TIMERA0_VECTOR
__interrupt void ta0_isr(void)
#elif defined(__GNUC__)
void __attribute__ ((interrupt(TIMERA0_VECTOR))) ta0_isr (void)
#else
#error Compiler not supported!
#endif
{
TACTL = 0;
LPM3_EXIT; // Exit LPM3 on return
}
// ADC12 Interrupt Service Routine
#if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
#pragma vector=ADC12_VECTOR
__interrupt void ADC12ISR (void)
#elif defined(__GNUC__)
void __attribute__ ((interrupt(ADC12_VECTOR))) ADC12ISR (void)
#else
#error Compiler not supported!
#endif
{
static unsigned int index = 0;
results[index++] = ADC12MEM0; // Move results
if (index == 512)
{
ADC12CTL0 &= ~ENC; // Stop conversion
index = 0;
P1OUT |= 0x01;
__bis_SR_register(LPM3_bits); // Enter LPM3
}
}
