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TMS320F28335: ECAP检测

Part Number: TMS320F28335

在引脚上通过信号源输入ECAP检测的方波,发现ECAP检测到的值是方波的毛刺所在的地方,而不是程序设置的方波下降沿。如果方波波形没有毛刺的话,ECAP就会检测不到数据。具体的配置如下:

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ECap4Regs.ECCTL1.bit.CAP1POL = 1;// 0; //0 => Rising Edge; 1 => Falling Edge;
ECap4Regs.ECCTL1.bit.CTRRST1 = 0; //0 => Do not reset counter
ECap4Regs.ECCTL1.bit.CAPLDEN = 1; //1 => Enable cap load
ECap4Regs.ECCTL1.bit.PRESCALE = 0; //0 => Bypass the prescaler
ECap4Regs.ECCTL2.bit.CAP_APWM = 0; //0 => Capture mode; 1 => APWM mode
ECap4Regs.ECCTL2.bit.CONT_ONESHT = 1; //1 => One shoot mode
ECap4Regs.ECCTL2.bit.SYNCO_SEL = 3; //3 => Disable synchronous signal out
ECap4Regs.ECCTL2.bit.SYNCI_EN = 1; //1 => Enable synchronous
ECap4Regs.ECCTL2.bit.STOP_WRAP = 0; //n => Stop capture sequence after event n + 1
ECap4Regs.ECCTL2.bit.TSCTRSTOP = 1; //1 => Allow TSCTR to run
ECap4Regs.CTRPHS = 0; //Synchronous Phase
ECap4Regs.ECEINT.bit.CEVT1 = 0; //1 => Enable interrupt for event 1
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