28335，qep初始化程序如下：
void POSSPEED_Init(void)
{
#if (CPU_FRQ_150MHZ)
EQep1Regs.QUPRD=1500000; // Unit Timer for 100Hz at 150 MHz SYSCLKOUT
#endif
#if (CPU_FRQ_100MHZ)
EQep1Regs.QUPRD=1000000; // Unit Timer for 100Hz at 100 MHz SYSCLKOUT
#endif
EQep1Regs.QDECCTL.bit.QSRC=00; // QEP quadrature count mode
EQep1Regs.QEPCTL.bit.FREE_SOFT=2;
EQep1Regs.QEPCTL.bit.PCRM=00; // PCRM=00 mode - QPOSCNT reset on index event
EQep1Regs.QEPCTL.bit.UTE=1; // Unit Timeout Enable
EQep1Regs.QEPCTL.bit.QCLM=1; // Latch on unit time out
EQep1Regs.QPOSMAX=0xffffffff;
EQep1Regs.QEPCTL.bit.QPEN=1; // QEP enable
EQep1Regs.QCAPCTL.bit.UPPS=5; // 1/32 for unit position
EQep1Regs.QCAPCTL.bit.CCPS=7; // 1/128 for CAP clock
EQep1Regs.QCAPCTL.bit.CEN=1; // QEP Capture Enable
}
当电机同方向转动时，电机转向位一直跳变，位置计数器总是在0和1之间跳动，示波器观测编码器A，B信号正常，求指点？
