Part Number: TMS320F28P550SJ
参考TMS320F28P550x例程，DBFEDHR配置是这样写的
HRPWM_setHiResRisingEdgeDelayOnly(uint32_t base,uint16_t hrRedCount)
{
ASSERT(HRPWM_isBaseValid(base));
ASSERT(hrRedCount<128U);
HWREGH(base+HRPWM_O_DBFEDHR)=hrRedCount<<9U)
}
把hrRedCount左移 9 位对齐到DBREDHR寄存器的高位字段，但是在TMS320F28P55x Real-Time Microcontrollers 技术手册P2497页计算DBREDHR寄存器数值是左移了8位
= (frac(DBRED Required) * MEP_ScaleFactor + 0.5) << 8 (Shifting is to move the value to the high byte of DBREDHR)
所以这个地方应该是移几位？
