;EN = P2.7
;RS = P2.6   ;PUZHONG-A2 
;RW = P2.5

;EN = P2.1
;RS = P2.4   ;IKMSIK V2.1
;RW = P2.3

;DATA = P0
;we use R0 register as the param register.
;we use R1 register as the Line-Column register.
;we use R3,R4 registers as the str_addr register, R3 = High_addr, R4 = Low_addr.
;Databuffer is P0 SFR Register.
;R7 register is the counter