AndMCU

Android MCU Simulator

AndMCU APK no longer available in GooglePlay, download it here: AndMCU110.apk

* The Documentation page is >>here.<<

INTRODUCTION:

The MCU simulator for Android OS runs Assembly language code similar to the 68705 MCU on a simulated on-screen prototype board.

Great for embedded applications hobbyists, students, teachers or anyone who likes to experiment with electronic Micro-controller prototype boards.

AndMCU simulates both software and hardware. As on a real prototype board, your ASM code must properly configure the

MCU I/O ports to control the hardware connected to it, such as lighting up segments on the digits, or reading keystrokes from

the keypad or dip-switches.

You can use the simple built-in text editor or any Android text editor of your choice to write your assembly code and then load it into AndMCU to run it.

The built-in assembler has many useful directives such as step-by-step trace mode, break-points, dumping memory contents

to an HTML file, adjusting the CPU speed and auto-running the loaded code.

It supports the following opcodes (subset of the 68705 MCU instruction set):

NOP,CLC,CLI,SEC,SEI,STOP,SWI,TAX,TXA,

LDA,LDX,STA,STX, ADD,ADC,CLR,CLRA,CLRX,DEC,DECA,DECX,

INC,INCA,INCX,SUB,SBC,

AND,CMP,COM,COMA,COMX,CPX,EOR,LSL,LSLA,LSLX,LSR,LSRA,LSRX,NEG,NEGA,

ORA,ROL,ROLA,ROR,RORA,TST,TSTA,

BRA,BSR,BCC,BCS,BEQ,BNE,BHI,BLO,BLS,JMP,JSR,RTS,RTI,

BCLR,BSET.

The AndMCU board simulates the following hardware components:

1) 8-Bit CPU with 3x 8-bit bi-directional ports.

2) 6 Digits display

3) 16-character LCD display

4) 2x 8-bit DIP Switches

5) 2x8 LED Bargraph displays

6) 12-key keypad

7) 1 piezo buzzer

8) External Interrupt push-button

9) Timer interrupt

10) 1 Analog input (light sensor).

SCREEN-SHOTS:

SCHEMATIC OF SIMULATED HARDWARE:

SAMPLE ASM CODE:; Comment line .autorun ; Auto-run file at startup.speed 100 ; set CPU speedPORTA equ 0x0PORTB equ 0x1PORTC equ 0x2DDRA equ 0x3DDRB equ 0x4DDRC equ 0x5key equ 20 ; key registersegreg equ 30 ; segments registry.lcd "Press keys" ; Startup message on LCD; --------------; Initialize; --------------init: lda #255 sta DDRA ; port A output lda #0 sta DDRB ; port B input lda #15 sta DDRC loop: jsr scan ; handle both key and display lda key cmp #255 beq loop ; no pressed key tax lda digdef,x ; convert for segment ldx #2 sta segreg,x ; register pressed key on first digit jmp loop; ------------------; Scan routine; ------------------scan: ldx #2 lda #255 sta key ; clear key register lp1: lda #15 sta PORTC ; disable 7442 lda segreg,x ; read segment registry sta PORTA ; send to digit stx PORTC ; select current column lda PORTB ; read keypad cmp #255 beq next ; no key pressed cmp #254 ; top row key bne cn1 lda keytab1,x sta key rts cn1: cmp #127 ; bottom row key bne next lda keytab2,x sta key rts next: incx cpx #8 bne lp1 rtsdigdef: .db 63,3,109,103,83,118,126,35,127,119,123,94,60,79,124,120,0 keytab1: .db 0,0,1,2,3,4,5,10,0 keytab2: .db 0,0,6,7,8,9,0,11,0