AD 单通道采样定时器控制传送PC机程序出错

只看该作者 · 2018-5-18 10:44

本帖最后由 Monkeywong 于 2018-5-18 11:43 编辑

求助！

程序如下：  使用IAR调试无法进入中断

#include"msp430x54x.h"
typedef  unsigned  char  uint8;
typedef unsigned  int uint16;
uint8  gRdata,gADvalue_L, gADvalue_H,flag;
uint16  gADvalue,gADvalue0;
void uca1_init(void);
void ADC12Init(void);
void uca1_init(void)
{
P5SEL |= 0xc0;                                                                // P5.6,7 用作USCI_A1的TXD/RXD
UCA1CTL1 |= UCSWRST;                                                          // UCA1CTL1串口控制寄存器，复位状态保持
UCA1CTL1 |= UCSSEL_2;                                                          // 选择时钟为SMCLK,频率为1MHz.
UCA1BR0 = 0x09;                                                                // 1MHz/115200=8.6
UCA1BR1 = 0x00;
UCA1MCTL = UCBRS_1 + UCBRF_0;                                                 // 波特率调整（见数据手册）
UCA1CTL1 &= ~UCSWRST;                                                       // 串口释放
}
void ADC12Init(void)
{
ADC12CTL0 &= ~ADC12ENC;                                                       //ADC12初始状态，不能启动AD转换
P6SEL |= 0x01;                                                                // 选择A0通道；
ADC12CTL0 = ADC12ON + ADC12REFON + ADC12REF2_5V + ADC12SHT0_1 + ADC12MSC;    //打开ADC转化内核，内部参考电压发生器打开，2.5V，选择采样保持定时器0
P11DIR |= 0x07;                         // ACLK, MCLK, SMCLK 设置为时钟
P11SEL |= 0x07;                         // P11.0,1,2  ACLK = REFO = 32.768kHz, MCLK = SMCLK = (Default DCO)/2 = (2MHz/2) = 1MHz
ADC12CTL1 = ADC12DIV_7 + ADC12SSEL_1 + ADC12CONSEQ_0 + ADC12SHP + ADC12SHS_1;  //ACLK分频因子为8，单通道单次转换,采样信号来自采样定时器,定时器A触发采样
ADC12MCTL0 = ADC12INCH_0 + ADC12SREF_1;                                     //ADC12MCTL0的输入通道为A0
ADC12CTL0 |= ADC12ENC;                                                       //允许转换
}
void Clear_WDT(void)                                                             //WDT计数器清零函数
{
WDTCTL = WDTPW + WDTCNTCL;
}
void  main(void)
{
WDTCTL = WDTPW;                                                                //启动看门狗
uca1_init();                                                                //UART初始化
ADC12Init();                                                                //AD初始化
UCA1IE |= UCRXIE;                                                             //接收中断允许
ADC12IE |= BIT0;                                                             //AD中断允许
TA1CTL = TASSEL_2 + MC_1 + TACLR ;                                           //时钟源选择 SMCLK=1MHZ, 增计数模式,清除 TAR,定时器溢出中断允许
TA1CCTL0 = CCIE;                                                             //TA1CCR0中断允许
TA1CCR0 = 250;                                                             //设定中断间隔，1MHZ，250us，
_EINT();                                                                   //中断使能
while(1)
{
      Clear_WDT();                                                             //看门狗计数器清零
      if(flag == 1)
      {
         gADvalue0 = gADvalue;
         while((UCA1IFG&0x02) == 0x00);                                     //判断缓冲区
         gADvalue_H = gADvalue0&0xFF00;                                     //输出高8位
         gADvalue_H = gADvalue_H>>8;
         UCA1TXBUF = gADvalue_H;
         while((UCA1IFG&0x02) == 0x00);
         gADvalue_L = gADvalue0&0x00FF;                                     //输出低8位
         UCA1TXBUF = gADvalue_L;
         flag = 0;
      }
}
}
#pragma vector = TIMER1_A0_VECTOR
__interrupt void TIMER1_A0_ISR (void)
{
if((gRdata > 0x00)&&(gRdata != 0xff))                                     //向串口输入0x01与0xff之间的数值
{
      ADC12CTL0 |= ADC12SC;
      gRdata--;
      flag = 1;
}
else if(gRdata == 0xff)                                                 //向串口输入0xff；
{
      ADC12CTL0 |= ADC12SC;
      flag = 1;
}
}
#pragma vector = ADC12_VECTOR
__interrupt void ADC12ISR (void)
{
if(ADC12IV == 0x06)
{
      gADvalue = ADC12MEM0;                                              //将结果存入ADvalue
}
}
#pragma vector = USCI_A1_VECTOR                                              //串口接收与发送中断
__interrupt void USCI_A1_ISR(void)
{
switch(__even_in_range(UCA1IV,4))
{
case 0:break;                                                          // 无中断
case 2:                                                                //接收中断
      gRdata = UCA1RXBUF;                                              // 接收缓存的数据赋给变量gRdata
      break;
case 4:                                                                //发送中断
      break;
default: break;
}
}