步进电机的驱动信号

ORG 0000H JMP MAIN ORG 0030H MAIN: MOV R7, #019H ;25 LOOP: MOV P1, #11111110B;(1) CALL F_DELAY MOV P1, #11111101B;(2) CALL F_DELAY MOV P1, #11111011B;(3) CALL F_DELAY MOV P1, #11110111B;(4) CALL F_DELAY