• 状态
  • 已锁定 已锁定
  • 个回复 6 个回复
  • 名订阅用户 29 名订阅用户
  • 次查看 2746 次查看
  • 用户 0 名在线用户
选项
选项
相关

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

28027f launchpad sci fifo 中断

Qingyang Shen
Prodigy 50 points
Other Parts Discussed in Thread: CONTROLSUITE

不是道是不是配置有无，发送端给过来的数据无法触发fifo接收中断，发送已验证ok，但是接收一直有问题，以下为部分代码：

void scia_fifo_init()
{

SciaRegs.SCICCR.all=0x0007;

SciaRegs.SCICTL2.bit.TXINTENA=1;
SciaRegs.SCICTL2.bit.RXBKINTENA=1;
SciaRegs.SCIFFTX.all=0xC021;
SciaRegs.SCIFFRX.all=0xC022;
SciaRegs.SCIFFCT.all=0x00;
SciaRegs.SCICTL1.all=0x0023;
SciaRegs.SCIFFTX.bit.TXFIFOXRESET=1;
SciaRegs.SCIFFRX.bit.RXFIFORESET=1;
SciaRegs.SCIFFRX.bit.RXFFIENA=1;

}

void scia_loopback_init()
{
// Note: Clocks were turned on to the SCIA peripheral
// in the InitSysCtrl() function
int16 BAUDRATE=SCI_PRD;

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.all =0x0003;

SciaRegs.SCIHBAUD =BAUDRATE>>8;
SciaRegs.SCILBAUD =BAUDRATE;
SciaRegs.SCICCR.bit.LOOPBKENA =1; // Enable loop back
SciaRegs.SCICTL1.all =0x0023; // Relinquish SCI from Reset

}

interrupt void sciaRxFifoIsr(void)
{

Uint16 i;
for(i=Scia_Rx_Cnt;i<(2+Scia_Rx_Cnt);i++)
{
if(i!=Scia_RxBL)
Scia_RxBUF[i]=SciaRegs.SCIRXBUF.all; // Read data
}
SciaRegs.SCIFFRX.bit.RXFFOVRCLR=1; // Clear Overflow flag
SciaRegs.SCIFFRX.bit.RXFFINTCLR=1; // Clear Interrupt flag

PieCtrlRegs.PIEACK.all|=0x100; // Issue PIE ack
Scia_Rx_Cnt+=2;
if(Scia_Rx_Cnt>=Scia_RxBL)
{
COM1Rx_CheckSum();
}

}

void COM1Rx_CheckSum(void)
{
int i;
unsigned char checksum;
for(i=0;i<Scia_RxBL-1;i++)
{
checksum+=Scia_RxBUF[i];
}
if(checksum==Scia_RxBUF[Scia_RxBL-1])
{
Scia_Rece_Complete=1;
Scia_Dataprocess();
}
else
{
Scia_Rece_Complete=0;
}
Scia_Rx_Cnt=0;
}

void Scia_Dataprocess(void)
{
Scia_Requestrpm=Scia_RxBUF[6];
Scia_Actualrpm=Scia_Requestrpm*30;
}

  • 0
    TI__Guru 60308 points

    检查一下GPIO引脚配置，另外确定PIE级别有使能接收中断。

    另外参考controlSUITE例程进行排查：C:\ti\controlSUITE\device_support\f2802x\v230\f2802x_examples_structs\scia_loopback_interrupts

    Eric

  • 0 回复 Eric Ma
    Prodigy 50 points

    gpio引脚配置应该没啥问题，而且我的发送数据已经被成功接收，以下是我的main函数代码，不知道pie级的中断设置是否正确


    InitGpio();
    UART_Simulation_GPIO_Init();

    InitSysCtrl();

    InitSciGpio();

    // Disable and clear all CPU interrupts:
    DINT;

    InitPieCtrl();

    IER = 0x0000;
    IFR = 0x0000;

    InitPieVectTable();

    EALLOW; // This is needed to write to EALLOW protected registers
    PieVectTable.SCIRXINTA = &sciaRxFifoIsr;
    PieVectTable.SCITXINTA = &sciaTxFifoIsr;
    EDIS; // This is needed to disable write to EALLOW protected registers
    //
    InitCpuTimers(); // For this example, only initialize the Cpu Timers

    EnableInterrupts();

    scia_fifo_init(); // Initialize the SCI FIFO
    scia_loopback_init(); // Initalize SCI for digital loop back

    CPUTimer_Userset(&CpuTimer0,10,100);
    EALLOW; // This is needed to write to EALLOW protected registers
    PieVectTable.TINT0 = &cpu_timer0_isr;
    PieVectTable.TINT1 = &cpu_timer1_isr;
    PieVectTable.TINT2 = &cpu_timer2_isr;
    EDIS; // This is needed to disable write to EALLOW protected registers

    PieCtrlRegs.PIEIER1.bit.INTx7=1;
    // Enable interrupts required for this example
    PieCtrlRegs.PIECTRL.bit.ENPIE = 1; // Enable the PIE block
    PieCtrlRegs.PIEIER9.bit.INTx1=1; // PIE Group 9, INT1
    PieCtrlRegs.PIEIER9.bit.INTx2=1; // PIE Group 9, INT2
    IER = 0x100; // Enable CPU INT
    // EINT;



    IER |= M_INT1;
    IER |= M_INT13;
    IER |= M_INT14;

    EINT; // Enable Global interrupt INTM
    ERTM; // Enable Global realtime interrupt DBGM


    CpuTimer0Regs.PRD.all = mSec1;
    CpuTimer1Regs.PRD.all = mSec5;
    CpuTimer2Regs.PRD.all = mSec1000;

    Scia_Rx_Init();
    for(;;)
    {

    if(Scia_Txwait>=500)
    {
    Scia_Txwait=0;
    scia_xmit_sendchar();

    GPIO_UART1_SendChar();
    }
    }

  • 0 回复 Eric Ma
    Prodigy 50 points

    PIE级别有使能接收中断应该怎样设置？

  • 0 回复 Qingyang Shen
    TI__Guru 60308 points

    PIE中断我看到你已经打开了，你有试一下controlSUITE中的例程吗？另外注意就是进中断有FIFO的级别的，你设置是SciaRegs.SCIFFRX.all=0x0022，就表示只有接收超过2个数据，才会进中断。

    PieCtrlRegs.PIECTRL.bit.ENPIE = 1; // Enable the PIE block
    PieCtrlRegs.PIEIER9.bit.INTx1=1; // PIE Group 9, INT1
    PieCtrlRegs.PIEIER9.bit.INTx2=1; // PIE Group 9, INT2
    IER = 0x100; // Enable CPU INT

  • 0 回复 Eric Ma
    Prodigy 50 points

    接收的数据是12字节，每次开中断我处理两个字节，12个字节处理完计算checksum，就是不知道问题出在哪里

    interrupt void sciaRxFifoIsr(void)
    {

    Uint16 i;
    for(i=Scia_Rx_Cnt;i<(2+Scia_Rx_Cnt);i++)
    {
    if(i!=Scia_RxBL)
    Scia_RxBUF[i]=SciaRegs.SCIRXBUF.all; // Read data
    }
    SciaRegs.SCIFFRX.bit.RXFFOVRCLR=1; // Clear Overflow flag
    SciaRegs.SCIFFRX.bit.RXFFINTCLR=1; // Clear Interrupt flag

    PieCtrlRegs.PIEACK.all|=0x100; // Issue PIE ack
    Scia_Rx_Cnt+=2;
    if(Scia_Rx_Cnt>=Scia_RxBL)
    {
    COM1Rx_CheckSum();
    }

  • 0 回复 Qingyang Shen
    TI__Guru 60308 points

    我看不出代码有什么问题。

    你用串口助手调试一下，往它发数据，然后再中断那儿设断点，观察串口中断标志位和PIE中断标志位的变化。

    Eric