DSP28335SCI中断FIFO问题！
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;
unsigned char sdataA,sdataB,rdataB,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;
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=sdataB=rdataB=0x00;
}
for(;;)
//--------------------传送数据至上位机--------------------
{
sdataB=0x03;
sdataB=0x06;
sdataB=0x02;
sdataB=00; //01:16位数据高8位(人为设定地址位)
sdataB=Ig;//电压信号 //01:16位数据低8位(人为设定地址位)
//sdataB=100;
sdataB=00; //02高8位
sdataB=freq*0.5; // 工作频率 02低8位
//sdataB=300*0.5;
sdataB=00; //03高8位
sdataB=pretc; //03低8位
//sdataB=1;
sdataB=00; //04高8位
sdataB=Ib;//04低8位
check=CRC16(sdataB,11);//CRC校验，check是16位，故应右移8位
sdataB=(check>>8)&(0x00FF);
sdataB=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 = rdataB;//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 = rdataB;//取回FIFO里的20个数据
for(lh_6=0;lh_6<20;lh_6++)
{
if(sdataA == 0x06)
{
lh_3 = sdataA; //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;//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 =0.05ms10ms for key action once
//counter num = 10/0.05 =200
for(i=0;i<7;i++)
{
SampleTable= * AD_CHIPSEL;
}
GpioDataRegs.GPASET.bit.GPIO0=1;
Ug= (SampleTable+10) * 0.000305176;//Ug
Ia= (SampleTable-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 intlh_i;
if(sciRxcounter == 0)
{
for(lh_2=0;lh_2<10;lh_2++)
{
rdataB = (SciaRegs.SCIRXBUF.all) & 0x00FF; //读取数据
}
}
if(sciRxcounter == 1)
{
//sciRxcounter =0;
for(lh_2=10;lh_2<20;lh_2++)
{
rdataB = (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--------------------------------
//--------------------------------------------------------------------------
我觉得你还是先把SCI模块中断接收单独调好，再把屏幕功能加上比较好 没耐心看这么长的代码 问题解决没有？
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