MSP430 序列通道单次转换问题

只看该作者 · 2017-11-21 16:47

我想实现的功能为：通过8个通道采集AD，定时器触发采样率为1个周期80个点，然后将通道ADC12CH_0和通道ADC12CH_1采集的数据存储在开辟的两段FRAM区域里面，用序列通道（ADC12CONSEQ_1）采。但是，不能进入中断。不知道啥原因，下面是程序部分，请各位大神帮忙解答！万分感谢。（注：我用的MCU是MSP430FR5969）

#include <msp430.h>

#define FRAM_TEST_START0 0x9000
#define FRAM_TEST_START1 0xD000

volatile unsigned long ADC_Data[8];
unsigned char count = 0;
unsigned long *FRAM_write_ptr;

void GPIOInit(void)
{

// Configure all un-used GPIO to lowest power state
P1DIR = 0xFF;
P1OUT = 0;

P1SEL1 |= BIT0 | BIT1 | BIT2 | BIT3 | BIT4 | BIT5;// Configure P1.0 P1.1 P1.2 P1.3 P1.4 P1.5for ADC
P1SEL0 |= BIT0 | BIT1 | BIT2 | BIT3 | BIT4 | BIT5;// A0~A5

P2DIR = 0xFF;
P2OUT = 0;
// P2OUT = 0xFF;
P2SEL1 |= BIT3 | BIT4; // Configure P2.3 and P2.4 for ADC
P2SEL0 |= BIT3 | BIT4; // A6~A7

P3DIR = 0xFF;
P3OUT = 0;
// P2OUT = 0xFF;

P4DIR = 0xFF;
P4OUT = 0;

PJOUT = 0;
PJSEL0 = BIT4 | BIT5;                // For XT1
PJDIR = 0xFFFF;

// Disable the GPIO power-on default high-impedance mode to activate
// previously configured port settings
PM5CTL0 &= ~LOCKLPM5;
}

void clockInit(void)
{
// Clock System Setup
CSCTL0_H = CSKEY >> 8;                // Unlock CS registers
CSCTL1 = DCOFSEL_6;                   // Set DCO to 8MHz
CSCTL2 = SELA__LFXTCLK | SELS__DCOCLK | SELM__DCOCLK; // Set ACLK = XT1; MCLK = SMCLK = DCO
CSCTL3 = DIVA__1 | DIVS__1 | DIVM__1; // Set all dividers
CSCTL4 &= ~LFXTOFF;                   // Enable LFXT1
do
{
      CSCTL5 &= ~LFXTOFFG;             // Clear XT1 fault flag
      SFRIFG1 &= ~OFIFG;
} while (SFRIFG1 & OFIFG);             // Test oscillator fault flag
CSCTL0_H = 0;                         // Lock CS registers

}

void TimerInit(void)
{

// Configure Timer0_A
TA0CCR0 = 8-1;                         // 32K/32 = 1000Hz freq.
TA0CCTL1 = OUTMOD_7;                   // CCR1 reset/set
TA0CCR1 = 4;                            // 16/32 = 50% duty cycl
TA0CTL = TASSEL__ACLK | MC__UP | TACLR; // ACLK, up mode, clear TAR
}

void FRAMWrite(unsigned long data)
{

*FRAM_write_ptr++ = data;

}

void ADC12Init()
{
// By default, REFMSTR=1 => REFCTL 是配置内部参考电压的寄存器
// while(REFCTL0 & REFGENBUSY);                            // 如果参考电压发生器busy, 等待
// REFCTL0 |= REFVSEL_2 | REFON;                         // 选择内部参考源 ref = 2.5V，使能内部参考源

// Configure ADC12
ADC12CTL0 = ADC12SHT0_2 | ADC12ON | ADC12MSC;    // Sampling time, S&H=16, ADC12 on
ADC12CTL1 = ADC12SHP + ADC12SHS_1 + ADC12SSEL_1 + ADC12CONSEQ_1;    // Use sampling timer, Use TA0CCR1 output as trigger , sequence channel
ADC12CTL2 |= ADC12RES_2 + ADC12PWRMD; // 12-bit conversion results, low power mode       ADC12CTL3 = ADC12CSTARTADD_0;// | ADC12CSTARTADD_1;

// while(!(REFCTL0 & REFGENRDY));       // 等待参考源生效

ADC12IER0 |= ADC12IE0;                //开中断

ADC12MCTL7 |= ADC12INCH_7 | ADC12VRSEL_1;       // A2 ADC input select; Vref=AVCC
ADC12MCTL1 |= ADC12INCH_1 | ADC12VRSEL_1;
ADC12MCTL0 |= ADC12INCH_2 | ADC12VRSEL_1;
ADC12MCTL3 |= ADC12INCH_3 | ADC12VRSEL_1;
ADC12MCTL4 |= ADC12INCH_4 | ADC12VRSEL_1;
ADC12MCTL5 |= ADC12INCH_5 | ADC12VRSEL_1;
ADC12MCTL6 |= ADC12INCH_6 | ADC12VRSEL_1;
ADC12MCTL0 |= ADC12INCH_0 | ADC12VRSEL_1 + ADC12EOS;

ADC12CTL0 |= ADC12ENC | ADC12SC; //转换使能，开始转换
}

int main(void)
{
WDTCTL = WDTPW | WDTHOLD;                // Stop WDT
GPIOInit();
clockInit();
TimerInit();
ADC12Init();

while (1)
{
      __bis_SR_register(LPM3_bits | GIE); // LPM3, ADC12_ISR will force exit
      __no_operation();                // For debugger
}

}

#if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
#pragma vector = ADC12_VECTOR
__interrupt void ADC12_ISR(void)
#elif defined(__GNUC__)
void __attribute__ ((interrupt(ADC12_VECTOR))) ADC12_ISR (void)
#else
#error Compiler not supported!
#endif
{
switch(__even_in_range(ADC12IV, ADC12IV_ADC12RDYIFG))
{
      case ADC12IV_NONE:       break; // Vector  0:  No interrupt
      case ADC12IV_ADC12OVIFG:  break; // Vector  2:  ADC12MEMx Overflow
      case ADC12IV_ADC12TOVIFG: break; // Vector  4:  Conversion time overflow
      case ADC12IV_ADC12HIIFG:  break; // Vector  6:  ADC12BHI
      case ADC12IV_ADC12LOIFG:  break; // Vector  8:  ADC12BLO
      case ADC12IV_ADC12INIFG:  break; // Vector 10:  ADC12BIN
      case ADC12IV_ADC12IFG0:          // Vector 12:  ADC12MEM0 Interrupt

         ADC_Data[0] = ADC12MEM0;
         ADC_Data[1] = ADC12MEM1;

         FRAM_write_ptr = (unsigned long *)FRAM_TEST_START0;
         FRAMWrite(ADC_Data[0]);                         // Endless loop
         ADC12MCTL0&=~ADC12INCH_2; //通道清2

         FRAM_write_ptr = (unsigned long *)FRAM_TEST_START1;
         FRAMWrite(ADC_Data[1]);                         // Endless loop
         ADC12MCTL1&=~ADC12INCH_3; //通道清3

            // Exit from LPM0 and continue executing main
            __bic_SR_register_on_exit(LPM3_bits);
         break;
      case ADC12IV_ADC12IFG1: break; // Vector 14:  ADC12MEM1
      case ADC12IV_ADC12IFG2: break; // Vector 16:  ADC12MEM2
      case ADC12IV_ADC12IFG3: break; // Vector 18:  ADC12MEM3
      case ADC12IV_ADC12IFG4: break; // Vector 20:  ADC12MEM4
      case ADC12IV_ADC12IFG5: break; // Vector 22:  ADC12MEM5
      case ADC12IV_ADC12IFG6: break; // Vector 24:  ADC12MEM6
      case ADC12IV_ADC12IFG7: break; // Vector 26:  ADC12MEM7
      case ADC12IV_ADC12IFG8: break; // Vector 28:  ADC12MEM8
      case ADC12IV_ADC12IFG9: break; // Vector 30:  ADC12MEM9
      case ADC12IV_ADC12IFG10:  break; // Vector 32:  ADC12MEM10
      case ADC12IV_ADC12IFG11:  break; // Vector 34:  ADC12MEM11
      case ADC12IV_ADC12IFG12:  break; // Vector 36:  ADC12MEM12
      case ADC12IV_ADC12IFG13:  break; // Vector 38:  ADC12MEM13
      case ADC12IV_ADC12IFG14:  break; // Vector 40:  ADC12MEM14
      case ADC12IV_ADC12IFG15:  break; // Vector 42:  ADC12MEM15
      case ADC12IV_ADC12IFG16:  break; // Vector 44:  ADC12MEM16
      case ADC12IV_ADC12IFG17:  break; // Vector 46:  ADC12MEM17
      case ADC12IV_ADC12IFG18:  break; // Vector 48:  ADC12MEM18
      case ADC12IV_ADC12IFG19:  break; // Vector 50:  ADC12MEM19
      case ADC12IV_ADC12IFG20:  break; // Vector 52:  ADC12MEM20
      case ADC12IV_ADC12IFG21:  break; // Vector 54:  ADC12MEM21
      case ADC12IV_ADC12IFG22:  break; // Vector 56:  ADC12MEM22
      case ADC12IV_ADC12IFG23:  break; // Vector 58:  ADC12MEM23
      case ADC12IV_ADC12IFG24:  break; // Vector 60:  ADC12MEM24
      case ADC12IV_ADC12IFG25:  break; // Vector 62:  ADC12MEM25
      case ADC12IV_ADC12IFG26:  break; // Vector 64:  ADC12MEM26
      case ADC12IV_ADC12IFG27:  break; // Vector 66:  ADC12MEM27
      case ADC12IV_ADC12IFG28:  break; // Vector 68:  ADC12MEM28
      case ADC12IV_ADC12IFG29:  break; // Vector 70:  ADC12MEM29
      case ADC12IV_ADC12IFG30:  break; // Vector 72:  ADC12MEM30
      case ADC12IV_ADC12IFG31:  break; // Vector 74:  ADC12MEM31
      case ADC12IV_ADC12RDYIFG: break; // Vector 76:  ADC12RDY
      default: break;
}
}

只看该作者 · 2017-11-21 17:16

应该在中断里边采数据吧！

只看该作者 · 2017-11-21 17:29

定时器触发一直都在采集数据的，中断里面是将我采集的数据度给FRAM中

只看该作者 · 2017-11-21 17:39

开通连续采集是吧

只看该作者 · 2017-11-21 17:53

ADC12IER0 |= ADC12IE0; //开中断
这句有问题
应该开中断7，并且在中断ADC12IV_ADC12IFG7里进行数据提取

只看该作者 · 2017-11-21 18:05

开通连续采集是吧

楼主是序列通道单次采集

只看该作者 · 2017-11-23 23:00

AD数据采集的设计，的看具体的寄存器的

1万 · 2017-12-4 21:13

楼主不使用中断？

1万 · 2017-12-4 21:14

硬件不能实现对吧。

1万 · 2017-12-4 21:15

楼主说的不进入ADC中断吗？

只看该作者 · 2017-12-4 21:20

void ADC12()
{

  P6SEL = 0x0F;                            // Enable A/D channel inputs

  ADC12CTL0 = ADC12ON+ADC12MSC+ADC12SHT0_15; // Turn on ADC12, extend sampling time
                                          // to avoid overflow of results
  ADC12CTL1 = ADC12SHP+ADC12CONSEQ_3;    // Use sampling timer, repeated sequence
  ADC12MCTL0 = ADC12INCH_0;                // ref+=AVcc, channel = A0
  ADC12MCTL1 = ADC12INCH_1+ADC12EOS;                // ref+=AVcc, channel = A1
  //ADC12MCTL2 = ADC12INCH_2+ADC12EOS;                // ref+=AVcc, channel = A2
  //ADC12MCTL3 = ADC12INCH_3+ADC12EOS;       // ref+=AVcc, channel = A3, end seq.
  ADC12IE = 0x02;                         // Enable ADC12IFG.2
  ADC12CTL0 |= ADC12ENC;                   // Enable conversions
  ADC12CTL0 |= ADC12SC;                   // Start convn - software trigger

}
#pragma vector=ADC12_VECTOR
__interrupt void ADC12ISR(void)
{
  static unsigned int index = 0;
  u16 c;
  switch(__even_in_range(ADC12IV,34))
  {
  case  0: break;                         // Vector  0:  No interrupt
  case  2: break;                         // Vector  2:  ADC overflow
  case  4: break;                         // Vector  4:  ADC timing overflow
  case  6: break;                         // Vector  6:  ADC12IFG0
  case  10: break;                         // Vector  8:  ADC12IFG2
  case 12: break;                         // Vector 10:  ADC12IFG3
  case 8:                               // Vector 12:  ADC12IFG1
A0results[index] = ADC12MEM0;          // Move A0 results, IFG is cleared
A1results[index] = ADC12MEM1;          // Move A1 results, IFG is cleared
...
  case 14: break;                         // Vector 14:  ADC12IFG4
  case 16: break;                         // Vector 16:  ADC12IFG5
  case 18: break;                         // Vector 18:  ADC12IFG6
  case 20: break;                         // Vector 20:  ADC12IFG7
  case 22: break;                         // Vector 22:  ADC12IFG8
  case 24: break;                         // Vector 24:  ADC12IFG9
  case 26: break;                         // Vector 26:  ADC12IFG10
  case 28: break;                         // Vector 28:  ADC12IFG11
  case 30: break;                         // Vector 30:  ADC12IFG12
  case 32: break;                         // Vector 32:  ADC12IFG13
  case 34: break;                         // Vector 34:  ADC12IFG14
  default: break;
  }
}

只看该作者 · 2017-12-4 21:20

对序列通道进行单次转换要进行如下设置: x=CSStartAdd

1万 · 2017-12-4 21:21

static uchar adc_flag = 0 ;
uint AD_TEMP = 0 ;
void int_clk()
{
uchar i ;
BCSCTL1&=~XT2OFF; //打开XT振荡器
BCSCTL2|=SELM1+SELS; //MCLK为8MHz,SMCLK为8MHz
do
{
IFG1&=~OFIFG; //清除振荡错误标志
for(i=0;i<100;i++)
_NOP(); //延时等待
}
while((IFG1&OFIFG)!=0); //如果标志为1,则继续循环等待
IFG1&=~OFIFG;
}
int_adc()
{
P6SEL |= BIT0 ; //选择ＡＤ通道
ADC12CTL0 |= ADC12ON + SHT0_2 + REF2_5V + REFON ; //采样保持时间为16个ADC12CLK
/*ADC12ON ADC模块电源控制位；
REF2_5V 内部参考电压选择位０：１.５Ｖ　　１：２.５Ｖ
REFON 参考电压模块控制位０：关闭　１：打开*/
ADC12CTL1 |= ADC12SSEL0 + ADC12SSEL1 ; //ADC12时钟源选择控制位　00ADC12OSC 01ACLK 10MCLK 11SMCLK
ADC12MCTL0 = 0x10; // 连续转换结束通道，CHANNEL = A0 参考选择控制位
ADC12IE |= 0x01; //使能A/D转换器
ADC12CTL0 |= ENC ; //AD转换使能
}
#pragma vector = ADC_VECTOR
__interrupt void ADC12ISR(void)
{
while((ADC12CTL1 & 0x01)== 1); //等待转换完
adc_flag = 1 ;
AD_TEMP = ADC12MEM0 ; //设置ＡＤ转换完成标志，并读取ＡＤＣ值
}
void main()
{
WDTCTL = WDTPW + WDTHOLD ;
int_clk();
int_adc();
_EINT(); //使能中断
adc_flag = 1 ;
while(1)
{
while(adc_flag == 1)
{
ADC12CTL0 |= ADC12SC ; //开启转换
ADC12CTL0 &= ~ADC12SC ;
adc_flag = 0 ; //清中断标志
}
}
}

只看该作者 · 2017-12-4 21:22

连续转换ADC完转换自始转换需要再启ADC工作

1万 · 2017-12-4 21:23

1、设置通道

2、打开ADC,设置采样时间

3、使用采用定时器

4、设置参考电压

5、使能开始

6、采样开始

7、等待转换完成

8、把转换的值存入变量

只看该作者 · 2017-12-4 21:23

  ADCMCTL0=SREF_0;                                     //Vr+=AVcc,Vr-=AVss;

/*

SREF  参考电压选择位

*/

ADC12CTL0|=ENC;                                              //首次转换由SAMPCON上升沿启动

/*

ENC 转换允许位

0：ADC12为初始状态，不能启动A/D转换

1：首次转换由采样信号上升沿启动

*/

ADC12CTL0|=ADC12SC;                                  //采样/转换控制位开

/*

ADC12SC  采样/转换控制位

*/

只看该作者 · 2017-12-4 21:24

ADC转换过程包括两个过程：采样和量化。采样率决定了采样过程的时间及精度，量化位数直接决定量化过程的精度。

1万 · 2017-12-4 21:24

楼主后面说的使用什么进行采样？

1万 · 2017-12-4 21:24

代码开启了中断了吗？

1万 · 2017-12-4 21:24

还是定时器中断？

MSP430 序列通道单次转换问题

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