How to code the value from temperature sensor to the lcd in emu8086? - emu8086
I have the value from temperature sensor. How do I continue that coding to display the value from the temperature sensor to the LCD ?
ORG 2000H
DATA SEGMENT
; PORT ADDRESSES FOR LCD
PORTA1 EQU 00H
PORTB1 EQU 02H ; INPUT
PORTC1 EQU 04H ; UPPER LCD
CONTROL_REG1 EQU 06H ; LOWER LCD
;PORT ADDRESSES FOR ADC
PORTA2 EQU 10H ; INPUT TO DI
PORTB2 EQU 12H
PORTC2 EQU 14H ; IN ADC
CONTROL_REG2 EQU 16H
temperature_range db -10,-9,-8,-7,-6,-5,-4,-3,-2,-1,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24
db 25,26,27,28,29,30,31,32,33,34,35,36,37,38,39
humidity_range db 25,26,27,28,29,30,31,32,33,34,35,3,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59
db 60,61,62,63,64,65,66,67,68,69,7,71,72,73,74
;INITIALIZE THE 8255 FROM HUMIDITY SENSOR
; TAKE TEMPERATURE FROM TEMPERATURE SENSOR
MOV AL, 02H
OUT PORTA2, AL
MOV AL, 06H
OUT CONTROL_REG2, AL
MOV AL, 00H
OUT CONTROL_REG2, AL
MOV AL,02H
OUT CONTROL_REG2,AL
MOV AL,01H
OUT CONTROL_REG2,AL
MOV AL,03H
OUT CONTROL_REG2,AL
MOV AL,02H
OUT CONTROL_REG2,AL
MOV AL,00H
OUT CONTROL_REG2,AL
IN AL, PORTC2
MOV AL, 10011010B
OUT CONTROL_REG2, AL
IN AL, PORTA2
Edit : added code some indentations to better explain what was said, better CTRL+C and CTRL+V and better intepretation.
Related
how can i print text in 16 bit real mode (graphical)?
i'm trying to write a boot sector that displays a small message on boot, but running the following on QEMU produces malformed text and any string with more than 5 characters doesn't show at all. here's the code i assembled with NASM to a raw .bin file [bits 16] [org 0x7c00] start: xor ax,ax mov ds,ax mov es,ax mov bx,0x8000 mov ax,0x13 int 0x10 mov ah,02 int 0x10 mov ah,0x02 mov bh,0x00 mov dh,0x12 mov dl,0x03 int 0x10 mov si , welcome welcome db "hello",13,0 call RainbowPrint RainbowPrint: mov bl,1 mov ah, 0x0E .repeat_next_char: lodsb cmp al, 0 je .done_print add bl,6 int 0x10 jmp .repeat_next_char .done_print: ret times (510 - ($ - $$)) db 0x00 dw 0xAA55 EDIT : here's an image showing the program running in qemu
You seem to overlapping your char_stream welcome db "hello", 13, 0 I reviewed your code and came up with the following that has a clear display of your specific char_stream [bits 16] [org 0x7c00] start: xor ax,ax mov ds,ax mov es,ax mov bx,0x8000 mov ax,0x13 int 0x10 mov ah,02 int 0x10 mov ah,0x02 mov bh,0x00 mov dh,0x12 mov dl,0x03 int 0x10 mov si , welcome ; Your [welcome] stream was here before... call RainbowPrint ;*********** ; Don't mind this area... just a simple key detection and reboot method... xor ax, ax int 0x16 xor ax, ax int 0x19 ;*********** ; Move your stream away from operatable code areas: welcome db "Hello, World!", 0x0D, 0x0A, 0x00 RainbowPrint: mov bl,1 mov ah, 0x0E .repeat_next_char: lodsb cmp al, 0 je .done_print add bl,6 int 0x10 jmp .repeat_next_char .done_print: ret times (510 - ($ - $$)) db 0x00 dw 0xAA55 The prefered text stream
How to find the values of the arguments in socket programming in Assembly?
I am trying socket programming for ARM, however I am not able to understand how the values for the arguments are decided. For example this is the link for Azeria Labs I understand that sys call for ARM register R7 gets it hence its 281 in this case and arguments are passed using R0, R1, R2, R3. But here how do you decide the values for R0(AF_INET) as 2 and R1(SOCK_STREAM) as 1 while creating socket(AF_INET, SOCK_STREAM, 0) Finding system call was easy $ grep socket /usr/include/asm/unistd-common.h #define __NR_socket (__NR_SYSCALL_BASE+281) #define __NR_socketpair (__NR_SYSCALL_BASE+288) Similarly is there a way to find the values for the arguments? I found an another resource which was for X86 Assembly which also has similar approach. %assign SOCK_STREAM 1 %assign AF_INET 2 %assign SYS_socketcall 102 %assign SYS_SOCKET 1 %assign SYS_CONNECT 3 %assign SYS_SEND 9 %assign SYS_RECV 10 section .text global _start ;-------------------------------------------------- ;Functions to make things easier. :] ;-------------------------------------------------- _socket: mov [cArray+0], dword AF_INET mov [cArray+4], dword SOCK_STREAM mov [cArray+8], dword 0 mov eax, SYS_socketcall mov ebx, SYS_SOCKET mov ecx, cArray int 0x80 ret Kindly let me know. Thank you. Linux alarmpi 4.4.34+ #3 Thu Dec 1 14:44:23 IST 2016 armv6l GNU/Linux
Is it the code, or is it the OS..?
MY CODE IS .model small .data arr db 83h, 12h, 0F0h, 0Bh, 89h cnt db 05h .code mov ax, #data mov ds, ax mov si, offset arr mov cl, cnt sub bl, bl sub dl, dl back: mov al, [si] and al, 80h jz skip inc bl skip: inc dl inc si dec cl jnz back mov ah, 4cH int 21H end THE ERRORS ARE AS FOLLOWS 1.asm:1: error: attempt to define a local label before any non-local labels 1.asm:1: error: parser: instruction expected 1.asm:2: error: attempt to define a local label before any non-local labels 1.asm:9: error: comma, colon, decorator or end of line expected after operand
Read a sector to address zero
%include "init.inc" [org 0x0] [bits 16] jmp 0x07C0:start_boot start_boot: mov ax, cs mov ds, ax mov es, ax load_setup: mov ax, SETUP_SEG mov es, ax xor bx, bx mov ah, 2 ; copy data to es:bx from disk. mov al, 1 ; read a sector. mov ch, 0 ; cylinder 0 mov cl, 2 ; read data since sector 2. mov dh, 0 ; Head = 0 mov dl, 0 ; Drive = 0 int 0x13 ; BIOS call. jc load_setup lea si, [msg_load_setup] call print jmp $ print: print_beg: mov ax, 0xB800 mov es, ax xor di, di print_msg: mov al, byte [si] mov byte [es:di], al or al, al jz print_end inc di mov byte [es:di], BG_TEXT_COLOR inc di inc si jmp print_msg print_end: ret msg_load_setup db "Loading setup.bin was completed." , 0 times 510-($-$$) db 0 dw 0xAA55 I want to load setup.bin to memory address zero. So, I input 0 value to es register (SETUP_SEG = 0). bx, too. But it didn't work. then, I have a question about this issue. My test is below. SETUP_SEG's value 0x0000 : fail 0x0010 : success 0x0020 : fail 0x0030 : fail 0x0040 : fail 0x0050 : success I can't understand why this situation was happened. All test was carried out on VMware. Does anyone have an idea ?
I'm not sure if this is your problem, but your trying to load setup.bin in the Real Mode IVT (Interrupt Vector Table). The IVT contains the location of each interrupt, so I'm assuming that your boatloader is overwriting them when it loads setup.bin into memory! Interrupts can be sneaky and tricky, since they can be called even if you didn't call them. Any interrupt vector you overwrote will likely cause undefined behavior when called, which will cause some problems. I suggest setting SETUP_SEG to a higher number like 0x2000 or 0x3000, but the lowest you could safely go is 0x07E0. The Osdev Wiki and Wikipedia have some helpful information on conventional memory and memory mapping. I hope this helps!
Assembly printing system date
I have a problem with printing system date because of cx register size. How can it be solved without any big changes? title casadatum zas segment stack db 256 dup(?) zas ends strsize EQU 64 dat segment print db 'Current System Date is : $' date db 'dd:mm:rrrr$' nl db 10,13,'$' dat ends code segment assume cs:code, ss:zas, ds:dat get_date proc mov ah,2ah int 21h mov al,dl call convert mov [bx],ax mov al,dh call convert mov [bx+3],ax mov al,cx call convert mov [bx+6],ax ret endp convert proc push dx mov ah,0 mov dl,10 div dl or ax, 3030h pop dx ret endp start: mov ax, seg dat mov ds,ax LEA BX, date CALL GET_date lea dx,print mov ah,09h int 21h lea dx,date mov ah,09h int 21h koniec: mov ah, 4ch int 21h code ends end start
Replace this part of your code mov al,cx call convert mov [bx+6],ax with these instructions mov al,100 xchg ax,cx div cl mov ch,ah call convert mov [bx+6],ax mov al,ch call convert mov [bx+8],ax