[讨论] 求DSPC2000 F28027eCAP完整项目文件

shiliu 2013-6-6 21:02 楼主

在论坛找了一个eCAP程序，改了一下，结果进不了中断，而且GPIO19脚还是高电平，求解决，代码如下：
void InitECapture()
{
ECap1Regs.ECEINT.all = 0x0000; // Disable all capture interrupts
ECap1Regs.ECCLR.all = 0xFFFF;  // Clear all CAP interrupt flags
ECap1Regs.ECCTL1.bit.CAPLDEN = 0; // Disable CAP1-CAP4 register loads
ECap1Regs.ECCTL2.bit.TSCTRSTOP = 0; // Make sure the counter is stopped
// Configure peripheral registers
ECap1Regs.ECCTL2.bit.CAP_APWM = 0;  //CAP mode
ECap1Regs.ECCTL2.bit.CONT_ONESHT = 0; // continuous mode
ECap1Regs.ECCTL2.bit.STOP_WRAP = 1; // Stop at 2 events
ECap1Regs.ECCTL1.bit.PRESCALE = 0; // Divide by 1
ECap1Regs.ECCTL1.bit.CAP1POL = 0;       // Rising edge
ECap1Regs.ECCTL1.bit.CAP2POL = 0;       // Rising edge
ECap1Regs.ECCTL1.bit.CTRRST1 = 1;       // Difference operation
ECap1Regs.ECCTL1.bit.CTRRST2 = 0;       // Difference operation
ECap1Regs.ECCTL2.bit.SYNCI_EN = 0;       // Enable sync in
ECap1Regs.ECCTL2.bit.SYNCO_SEL = 3;       //  Disable sync out signal
ECap1Regs.ECCTL1.bit.CAPLDEN = 1;       // Enable capture units
ECap1Regs.ECCTL2.bit.TSCTRSTOP = 1;       // Start Counter
ECap1Regs.ECEINT.bit.CEVT2 = 1;          // 2 events = interrupt
}
void main(void)
{
InitSysCtrl();
EALLOW; //允许访问受保护的空间
   GpioCtrlRegs.GPADIR.bit.GPIO1=1;
   GpioDataRegs.GPADAT.bit.GPIO1=1;
   EDIS;
   InitECap1Gpio();
   InitECapture();
   EALLOW;  // This is needed to write to EALLOW protected registers
   PieVectTable.ECAP1_INT = &ecap1_isr;
   EDIS; // This is needed to disable write to EALLOW protected registers  // Enable CPU INT4 which is connected to ECAP1-4 INT:
   IER |= M_INT4;
   PieCtrlRegs.PIEIER4.bit.INTx1 = 1;
   // Enable eCAP INTn in the PIE: Group 3 interrupt 1-6
   EINT; // Enable Global interrupt INTM
   ERTM; // Enable Global realtime interrupt DBGM
   while(1);
}
interrupt void ecap1_isr(void)
{
//ECap1Count = ECap1Regs.CAP1;
ECap2Count = ECap1Regs.CAP2;
GpioDataRegs.GPADAT.bit.GPIO1=0;
//ECap1Regs.ECCLR.all = 0xFFFF;
ECap1Regs.ECCLR.bit.CEVT2 = 1;
ECap1Regs.ECCLR.bit.CEVT1 = 1;
ECap1Regs.ECCLR.bit.INT = 1;
PieCtrlRegs.PIEACK.all = PIEACK_GROUP4;

}

回复评论（7）

沙发 ltbytyn

看一下你的InitECap1Gpio初始化： InitECap1Gpio()
我感觉你可能InitECap1Gpio初始化有问题

[ 本帖最后由 ltbytyn 于 2013-6-7 11:43 编辑 ]

点赞 2013-6-7 11:25

板凳 ltbytyn

还有你的表述里面应该是“GPIO1脚还是高电平”

点赞 2013-6-7 11:30

4楼 shiliu

回复沙发 ltbytyn 的帖子

那个初始化程序用的是本身自带的，和你发的那个帖子是一样的，
void InitECap1Gpio(void)

{

EALLOW;

// GpioCtrlRegs.GPAPUD.bit.GPIO5=0; //Enable pull-up on GPIO5 (CAP1)

GpioCtrlRegs.GPAPUD.bit.GPIO19=0; // Enable pull-up on GPIO19 (CAP1)

// GpioCtrlRegs.GPAQSEL1.bit.GPIO5=0; // Synch to SYSCLKOUT GPIO5 (CAP1)

GpioCtrlRegs.GPAQSEL2.bit.GPIO19=0;//Synch to SYSCLKOUT GPIO19(CAP1)

// GpioCtrlRegs.GPAMUX1.bit.GPIO5=3; // Configure GPIO5 as CAP1

GpioCtrlRegs.GPAMUX2.bit.GPIO19=3; // Configure GPIO19 as CAP1

EDIS;

}
程序里面的GPIO1我是用它来判断是否进入中断的啊，没有写错,就是GPIO19（捕获口）为高电压，进不了中断啊，求帮助，急求!!!!,非常感谢

点赞 2013-6-7 23:51

5楼 ltbytyn

InitSysCtrl();
EALLOW; //允许访问受保护的空间
   GpioCtrlRegs.GPADIR.bit.GPIO1=1;
   GpioDataRegs.GPADAT.bit.GPIO1=1;
   EDIS;
   InitECap1Gpio();
   InitECapture();
   EALLOW;  // This is needed to write to EALLOW protected registers
   PieVectTable.ECAP1_INT = &ecap1_isr;
   EDIS; // This is needed to disable write to EALLOW protected registers  // Enable CPU INT4 which is connected to ECAP1-4 INT:
   IER |= M_INT4;
   PieCtrlRegs.PIEIER4.bit.INTx1 = 1;
   // Enable eCAP INTn in the PIE: Group 3 interrupt 1-6

DINT;
InitPieCtrl();
IER = 0x0000;
IFR = 0x0000;

InitPieVectTable();
   EINT; // Enable Global interrupt INTM
   ERTM; // Enable Global realtime interrupt DBGM
   while(1);
}

IER、IFR、PIE初始化。调试时观察相应寄存器（PIE、ECAP等）的值是否正常。

点赞 2013-6-8 11:15