DSP28335SCI中断FIFO问题！

只看该作者 · 2016-12-9 22:18

DSP要和屏幕通信，SCI方式。单独查询发送的时候没问题，加了中断接收后，DSP发送出去的数据错了，且很多重复数据。接收数据是10个字一包，我用的10级接收FIFO，自己再另建个FIFO，接20个字处理一次。不知道哪里出问题了。代码如下：/****问题是单独发送可以，加了中断接收后，发送出来的数据乱了*********/
#include "DSP28x_Project.h"    // Device Headerfile and Examples Include File
#include "AD7656.h"
#include "math.h"
#include "modbus.h"
#include "control.h"

//===========================================================================
unsigned int check=0,fup=0,fdown=0; int cs; int counter=0; int counter2=0;

void InitEPwmMod(unsigned int lh_freq);             //ePWM模块设置
void InitEPwm6ADC(double f);//AD采样电路出发脉冲生成，f为KHz
interrupt void ADC_Int(void);//AD采样中断函数
interrupt void cpu_timer0_isr(void);//定时器0用于产生定时中断
//interrupt void scibTxFifoIsr(void);
interrupt void sciaRxFifoIsr(void);
void Gpio_select(void);
void protect(void);

void scia_fifo_init(void);
//void scic_fifo_init(void);
//void scib_fifo_init(void);

//unsigned char sdataC[15];
unsigned char sdataA[40],sdataB[40],rdataB[40],pretc=0;//pretc=0 指示灯绿色 pretc=1 指示灯红色
Uint16 rdata_pointB;             //SCIB接收数据检测
//unsigned int sdataA[40];
unsigned int sw1=0;
Uint16 i=0,j=0,j1=0,k=0,a=2,b=2; // Send data for SCI-B
Uint16 lh_1=0,lh_2=0,lh_3=150,lh_4=300,lh_5=300,lh_6=0;  //Recive data from SCI-A
unsigned int freq=300,freqt=300,sciRxcounter=0;// Initialization Frequency is 300Hz    unsigned int range 0-65535
void main(void)
{
//       int i=0;
//       Uint16 j=0;
      InitSysCtrl();

      DELAY_US(10000L);
      DELAY_US(10000L);
      DELAY_US(10000L);

InitEPwm1Gpio();
InitEPwm2Gpio();

Gpio_select();
InitEPwm6Gpio(); //AD_CLOCK
InitEPwm6ADC(20.0);

//       Configure XINT1
XIntruptRegs.XINT1CR.bit.POLARITY = 0;    // Falling edge interrupt
XIntruptRegs.XINT1CR.bit.ENABLE = 1;             //       Enable XINT1
asm("NOP");
GpioDataRegs.GPBCLEAR.bit.GPIO60=1;

InitXintf();
InitSciGpio();

DINT;

InitPieCtrl();

IER = 0x0000;
IFR = 0x0000;
InitPieVectTable();

EALLOW;  // This is needed to write to EALLOW protected registers
PieVectTable.TINT0 = &cpu_timer0_isr;
EDIS;

EALLOW;  // This is needed to write to EALLOW protected registers
PieVectTable.SCIRXINTA = &sciaRxFifoIsr;
// PieVectTable.SCITXINTA = &sciaTxFifoIsr;
EDIS;

EALLOW;       //This is needed to write to EALLOW protected registers
PieVectTable.XINT1 = &ADC_Int;//Set XINT1 in PIE
EDIS; //This is needed to disable write to EALLOW protected registers

EALLOW;
SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC = 0;
EDIS;

// InitEPwmMod();
// freq=300; //Initialization output PWM 300Hz
InitEPwmMod(freq);

EALLOW;
SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC = 1;
EDIS;

InitCpuTimers();//初始化时钟
// ConfigCpuTimer(&CpuTimer0, 15000, 100000);  //定时器0定时10s中断一次
ConfigCpuTimer(&CpuTimer0, 15000, 100000);
CpuTimer0Regs.TCR.all = 0x4001; // Use write-only instruction to set TSS bit = 0
CpuTimer0.InterruptCount = 0; //计数初值为0

PieCtrlRegs.PIECTRL.bit.ENPIE = 1;//使能PIE模块
PieCtrlRegs.PIEIER9.bit.INTx1 = 1;//PIE: Group 9 interrupt 1 SCI-A 接收中断
  // PieCtrlRegs.PIEIER9.bit.INTx2 = 1;//PIE: Group 9 interrupt 2 SCI-A 发送中断
PieCtrlRegs.PIEIER1.bit.INTx4 = 1;//Enable INTn in the PIE: Group 1 interrupt 4
PieCtrlRegs.PIEIER1.bit.INTx7 = 1;// Enable TINT0 in the PIE: Group 1 interrupt 7
IER |= M_INT1;//Enable CPU INT1;
IER |= M_INT9;//Enable CPU INT1;
      scia_fifo_init();
// scib_fifo_init(); // Init SCI-A B C
//       scic_fifo_init();

EINT; // Enable Global interrupt INTM
ERTM; // Enable Global realtime interrupt DBGM
for(i=0;i<40;i++)
{
      sdataA[i]=sdataB[i]=rdataB[i]=0x00;
}
for(;;)
//--------------------传送数据至上位机--------------------
      {
sdataB[0]=0x03;
      sdataB[1]=0x06;
      sdataB[2]=0x02;
      sdataB[3]=00;             //01:16位数据高8位(人为设定地址位)
sdataB[4]=Ig;//电压信号    //01:16位数据低8位(人为设定地址位)
//sdataB[4]=100;
sdataB[5]=00;             //02高8位
sdataB[6]=freq*0.5; // 工作频率    02低8位
//sdataB[6]=300*0.5;
      sdataB[7]=00;             //03高8位
      sdataB[8]=pretc; //03低8位
//sdataB[8]=1;
      sdataB[9]=00;             //04高8位
      sdataB[10]=Ib;//04低8位
      check=CRC16(sdataB,11);//CRC校验，check是16位，故应右移8位
      sdataB[11]=(check>>8)&(0x00FF);
      sdataB[12]=check&0x00FF;

      freq=freqt;
      if(sciRxcounter == 2)
      {
            /*******以下6句共用于禁止SCI-A接收中断*************/
            DINT;//禁止全局中断  INTM = 1
            PieCtrlRegs.PIEIER9.bit.INTx1 = 0;//0-禁止接收中断 1-允许接收中断
      for(lh_6=30;lh_6<35;lh_6++)    sdataA[lh_6] = rdataB[lh_6];//5个空周期
            PieCtrlRegs.PIEIFR9.bit.INTx1 = 0;//清除外设中断位
            PieCtrlRegs.PIEACK.all = PIEACK_GROUP9;//清除ACK位
            EINT;//使能全局中断  INTM = 0
            /*******以上6句共用于禁止SCI-A接收中断*************/

            for(lh_6=0;lh_6<20;lh_6++)             sdataA[lh_6] = rdataB[lh_6];//取回FIFO里的20个数据
            for(lh_6=0;lh_6<20;lh_6++)
            {
                     if(sdataA[lh_6] == 0x06)
                     {
                              lh_3 =       sdataA[lh_6+6];       //取回来数据是100-250，表示200-500
                              lh_4 = lh_3*2;    //数据回归到200-500
                     }
            }
            freqt = lh_4; //屏幕发回来的真实想要数值
            if((freqt<501) && (freqt>199))
            {
                     if(freq != freqt)
                     {
                              lh_5 = freqt;
                              InitEPwmMod(freqt);
                     }
            }
            sciRxcounter =0;
      }
      DELAY_US(10000L);    // it need to commented out for Frequence changes
      /*发送数据正常应该是03 02 06 00 Ig 00 Freq 00 pretc 00 Ib CRC CRC共13个字*/
      /* 其中Freq 根据串口接收到的值改变*/
      for(i=0;i<13;i++)
      {
         SciaRegs.SCITXBUF=sdataB[i];//SCITXBUF:SCIB发送器数据缓冲寄存器
   }
   PieCtrlRegs.PIEIER9.bit.INTx1 = 1; //0-禁止接收中断 1-允许接收中断
}
}

interrupt void ADC_Int(void)
{
      unsigned int i;
//       unsigned int fcnum,freq;
//f is 20KHz 1 interrupt =0.05ms  10ms for key action once
//counter num = 10/0.05       =200

      for(i=0;i<7;i++)
      {
            SampleTable[i]= * AD_CHIPSEL;
      }
      GpioDataRegs.GPASET.bit.GPIO0=1;

      Ug= (SampleTable[0]+10) * 0.000305176;//Ug
      Ia= (SampleTable[1]-20) * 0.000305176* 11.11111;//Ia
      XIntruptRegs.XINT1CR.bit.ENABLE = 1;
      PieCtrlRegs.PIEACK.all = PIEACK_GROUP1; // Enable to receive more interrupts from PIE1
      GpioDataRegs.GPACLEAR.bit.GPIO0=1;
      protect();
      }

interrupt void sciaRxFifoIsr(void)
      {
      //       unsigned int  lh_i;
         if(sciRxcounter == 0)
            {
                     for(lh_2=0;lh_2<10;lh_2++)
                              {
                                    rdataB[lh_2] = (SciaRegs.SCIRXBUF.all) & 0x00FF;       //读取数据
                              }
            }
            if(sciRxcounter == 1)
            {
                     //sciRxcounter =0;
                     for(lh_2=10;lh_2<20;lh_2++)
                              {
                                    rdataB[lh_2] = (SciaRegs.SCIRXBUF.all) & 0x00FF;       //读取数据
                              }
            }
            sciRxcounter++;
            /*正常收到的一组数据应该为06 FF FF FF FF 00 98 E7 5E 11 */

            SciaRegs.SCIFFRX.bit.RXFFOVRCLR = 1;             //清除溢出标志位
            SciaRegs.SCIFFRX.bit.RXFFINTCLR = 1;             //清除中断标注位
            SciaRegs.SCIFFTX.bit.TXFFINTCLR = 1;
            PieCtrlRegs.PIEACK.all |= 0x100;
      }

void scia_fifo_init()
{
SciaRegs.SCICCR.all =0x0007; // 1 stop bit,  No loopback
                                 // No parity,8 char bits,
                                 // async mode, idle-line protocol
SciaRegs.SCICTL1.all =0x0003; // enable TX, RX, internal SCICLK,
                                 // Disable RX ERR, SLEEP, TXWAKE
SciaRegs.SCICTL2.bit.TXINTENA =1;//使能发送中断
SciaRegs.SCICTL2.bit.RXBKINTENA =1;//使能接收中断
SciaRegs.SCIHBAUD =0x0003; //这两个值根据LSPCLK决定，LOSPCP来决定LSPCLK 现在LOSPCP=0,所以LSPCLK=SYSCLK/1 即150MHZ;
SciaRegs.SCILBAUD =0x00D0;//SCI_PRD;波特率为19200--3D0
SciaRegs.SCICCR.bit.LOOPBKENA =0; // 1-Enable 0-disable loop back
SciaRegs.SCIFFTX.all=0xCD28;// 发送FIFO有13个字
SciaRegs.SCIFFRX.all=0x0A21;// 接收FIFO有10个字
SciaRegs.SCIFFCT.all=0x00;

SciaRegs.SCICTL1.all =0x0023;    // Relinquish SCI from Reset
SciaRegs.SCIFFTX.bit.TXFIFOXRESET=1;
SciaRegs.SCIFFRX.bit.RXFIFORESET=1;
}

//--------------------------------------------------------------------------
//------------------------------NO MORE--------------------------------
//--------------------------------------------------------------------------