HAL_PAR_COUNT_DIR_CHANGE

 /* C.) COUNT FIRST PULSE ALWAYS IN CONTROL-DIRECTION */
 /* if downwards movement active (OR IDLE!) => set HallDir=1, if upwards movement active => set HalDir=0 */
 /* Hal_Out_mu1_OldDirVal=(UNUM8)((UNUM8)((Hal_In_mu1_RelDownAct)||(!Hal_In_mu1_RelUpAct)) ^ (UNUM8)(HAL_PAR_COUNT_DIR_CHANGE)); */

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Origin www.cnblogs.com/dannykong/p/11417606.html