#include <REG51F380.H>

;-------------------------------------------------------------------------------------------------------------------;
;CONSTANT DEFINES FOR CHAR_NUM AND CHAR_STATE
;-------------------------------------------------------------------------------------------------------------------;
CHAR_0          EQU 0C0H                ;DEFINE CHARS FOR 8BITSEG
CHAR_1          EQU 0F9H
CHAR_2          EQU 0A4H
CHAR_3          EQU 0B0H
CHAR_4          EQU 099H
CHAR_5          EQU 092H
CHAR_6          EQU 082H
CHAR_7          EQU 0F8H
CHAR_8          EQU 080H
CHAR_9          EQU 090H
CHAR_A          EQU 088H
CHAR_B          EQU 083H
CHAR_C          EQU 0C6H
CHAR_D          EQU 0A1H
CHAR_E          EQU 086H
CHAR_F          EQU 08EH
;-------------------------------------------------------------
AND_OP EQU 88H
OR_OP EQU 0C0H
NOT_OP EQU 0ABH
XOR_OP EQU 89H
ADD_OP EQU 8CH
SUB_OP EQU 0EAH
ROTL_OP EQU 0C7H
ROTR_OP EQU 0CEH

S_READY EQU 0
S_SELECT EQU 1
S_OP2 EQU 2
S_PROCESS EQU 3

OP_1 DATA 30H
OP_2 DATA 31H
OPER DATA 32H
STATE DATA 33H
N_STATE DATA 34H

KSET EQU P0.6
KLOAD EQU P0.7

CSEG AT 400H
    OP_TABLE:       ;OPERADORES
        DB AND_OP, OR_OP, NOT_OP, XOR_OP, ADD_OP, SUB_OP, ROTL_OP, ROTR_OP
CSEG AT 500H        ;caracteres segmento 8bits
    DIGITS_TABLE:
        DB CHAR_0, CHAR_1, CHAR_2, CHAR_3, CHAR_4, CHAR_5, CHAR_6, CHAR_7, CHAR_8, CHAR_9, CHAR_A, CHAR_B, CHAR_C, CHAR_D, CHAR_E, CHAR_F   ;0-F

CSEG AT 0H
    JMP RESET

RESET:
    ACALL Init_Device
    SETB KSET               ;ATIVAR BOTOES
    SETB KLOAD
    MOV R3, #0H
    MOV A, #0H
    MOV OP_1, #0H
    MOV OP_2, #0H
    MOV STATE, #S_READY
    MOV N_STATE, #S_READY
;-----------------------------------------------------
STATE_MACHINE:
    MOV STATE, N_STATE
    MOV A, STATE
    RL A
    MOV DPTR, #JMP_TABLE
    JMP @A+DPTR
JMP_TABLE:
    AJMP READY
    AJMP SELECT
;   AJMP OP2
;   AJMP PROCESS
;-----------------------------------------------------STATE READY
READY:
    MOV DPTR, #DIGITS_TABLE
    MOV P2, #0AFH
    ACALL START
DISPLAYBCD:
    MOV A, R3
    MOVC A, @A+DPTR
    MOV P2, A
BUTTONS:
    JNB KLOAD, OPER1
    JB KSET, BUTTONS
INCREMENT:
    JNB KSET, $
    INC R3
    CJNE R3, #16, DISPLAYBCD
    MOV R3, #0H
    JMP DISPLAYBCD
START:
    JB KSET, START
    JNB KSET, $
    RET
OPER1:
    MOV OP_1, R3
    MOV P1, OP_1
    MOV N_STATE, #S_SELECT
    JMP STATE_MACHINE
;---------------------------------------------STATE SELECT
SELECT:
    MOV DPTR, #OP_TABLE
    MOV R3, #0H
SELECT_2:
    MOV A, R3
    MOVC A, @A+DPTR
    MOV P2, A
BUTT_OPER:
    JNB KLOAD, $
    JB KSET, BUTT_OPER
INC_OPER:
    JNB KSET, $
    INC R3
    CJNE R3, #8, SELECT_2
    JMP SELECT




;------------------------------------------------------------------------
PCA_Init:
    MOV  PCA0MD,    #000h
    RET
Port_IO_Init:
    MOV  XBR1,      #040h
    RET
Init_Device:
    lcall PCA_Init
    lcall Port_IO_Init
    ret
;------------------------------------------------------------------------

END