Marvee Amasi Comments - Answer Overflow

Marvee Amasi

•Created by Marvee Amasi on 6/28/2024 in #📦-middleware-and-os

Trying to access the sensor's registers using memory-mapped I/O in a flat memory model

I'm trying to access the sensor's registers using memory-mapped I/O in a flat memory model, and I'm encountering a segmentation fault when I run the program, saying:

Segmentation fault (core dumped)

Segmentation fault (core dumped)

My relevant code :

global _start

section .text
    _start:
        ; I2C communication registers set up...
        
        ; base address for BMP280 registers setting
        movw $0x10000, %ax  ;  base address setting

        ; reading temp data register 
        movb (%rax), %bl  ; reading byte from temp register

        ; processing my temp data...

        movb $1, %eax
        int $0x80         ; exit system call

section .data
        ; data segment...
        message db "Temp data read", 0x0

global _start

section .text
    _start:
        ; I2C communication registers set up...
        
        ; base address for BMP280 registers setting
        movw $0x10000, %ax  ;  base address setting

        ; reading temp data register 
        movb (%rax), %bl  ; reading byte from temp register

        ; processing my temp data...

        movb $1, %eax
        int $0x80         ; exit system call

section .data
        ; data segment...
        message db "Temp data read", 0x0

11 replies

Gaming

Programming