Questions tagged [assembly]
A low-level programming language providing symbolic representation of machine code.
30
questions
2
votes
1answer
33 views
BCM2835 GPIO Pins vs. Physical Pin Numbers
Good morning.
I am attempting some low-level assembly coding for Raspberry Pi. Using the BCM2835 Peripherals Doc, I have successfully been able to work with the GPIO controller on my RPi Model B rev. ...
-2
votes
0answers
29 views
How to get CPU temperature in Assembly
Is there any way to read Raspberry Pi's CPU temperature using Assembly? I tried searching in the internet but there are only informations how to do this on linux via command.
2
votes
1answer
22 views
BCM2835 datasheet addressing system
I've been interested in writing a kernel for my old Raspberry Pi for quite a while, and managed to make work some ARM assembly code I found on the famous "Baking Pi" course by the University ...
0
votes
0answers
17 views
Is there any reference chart for converting basic assembly instructions to machine instructions and vice versa on raspberry pi 3?
I am fiddling with the raspberry pi 3 and have a basic understanding of assembly language (enough to pass an assembly language course in college), but I am by no means well practiced. I am trying to ...
0
votes
3answers
81 views
How can I run 32-bit compiled assembly code on Rasberry PI 4 B, if possible at all?
I bought the PI 4 B for a university project, as I have to make small 32-bit ARM assembly program. However I realized it too late, that it comes with an aarch64 architecture ARM processor.
I would ...
1
vote
0answers
198 views
Lighting an LED through Pi 4 Model B using Assembly
I have been struggling to light an LED using my raspberry pi 4 model b but have not been able to find a solution.
My assembly code :
.section .init
.globl _start
_start:
mov r0, #0xF0000000
orr r0, ...
4
votes
1answer
51 views
gcc does not compile code that compiles in 'as'
I'm trying to learn assembly using the raspberry pi. I have code that compiles using as but will not compile with gcc. I thought that as was the backend for gcc assembly so I'm confused why it is not ...
1
vote
1answer
71 views
Radio Transmission
Yes, I pretty much a noob, but I was wondering if there is a way to program the Raspberry Pi in Assembly Code to transmit data via radio frequencies (like remote control) between itself and another ...
1
vote
1answer
159 views
Read/Write GPIO
I wrote an assembly code for my Raspberry Pi to read an I/O with a button and switch an LED according to the state of the button. It seems that the I/O with the LED is toggling all the time and I don´...
2
votes
1answer
429 views
bootcode.bin RPi 3
I've been reading this document:
https://www.raspberrypi.org/documentation/hardware/raspberrypi/bootmodes/bootflow.md
About the boot process of the Raspberry Pi. I want to make a simple "Hello, ...
3
votes
1answer
180 views
Why does adding a nop or constant break my code?
I am learning the ARM architecture via bare metal programming on the Raspberry Pi 3. I have a booting "kernel" that prints out some info. I have reached a point that I don't understand what is ...
1
vote
2answers
926 views
Is there a program to execute assembly code and check registers?
In our university we have a computer's technology subject in which we have to program in ARM's assembly language.
We have the chance to use a simulator but I was wondering if I was able to execute ...
3
votes
1answer
163 views
OS-less raspberry pi 2 debugging of Assembly language
I have a Raspberry Pi 2 without an OS installed. I have an assignment where I have to create and display some code in assembly language for the Pi 2.
The lab that we have set up at school has ...
0
votes
1answer
183 views
unable to set GPIO 17 as an output by assembly program
I am trying to st GPIO 17 as an output. I am using Pi 2 model B. By searching for the base address of peripherals, I found that it is 0x3F000000. I want to write a code in assembly language, Following ...
3
votes
1answer
253 views
Regarding assembly language programming in Raspberry Pi
I am learning assembly language programming in Raspberry Pi 2 model B. I know about Code::Blocks and gdb. Using assembly language the processor's register can be controlled, but I want to control the ...
1
vote
0answers
245 views
RPi2 bare metal blinker
This is my first assembly program. I have a FAT32 formatted SD card with latest bootcode.bin, start.elf, and a flat binary named kernel7.img converted from the following dumped ELF file:
build/kernal....
2
votes
2answers
1k views
On-board LED connection to GPIO
I stumbled on this tutorial: http://www.cl.cam.ac.uk/projects/raspberrypi/tutorials/os/ok01.html
Unfortunately this is only made for the B rev2 board, whereas I got a B+ board and the board setup is ...
3
votes
1answer
500 views
Disassemble i386 in Raspbian?
I want to disassemble i386 machine instructions into human readable text in Raspbian.
I am a rookie Linux user and don't know the configuration of installed tools, but from what I understand I need ...
2
votes
1answer
924 views
Windows IoT Core GpioController - assembly 'Windows' causes a cycle
I am trying my new Raspberry Pi with Windows 10 IoT Core.
I have fallowed the steps of the installations and cofigurations, and every thing was fine until I've got to Blanky tutorial
http://ms-iot....
0
votes
1answer
72 views
Baking Pi OK05 - Why “ldr” twice to make the pattern work?
I'm carefully following Baking Pi with my model B, making sure I fully understand everything going on. I am now at lesson 5, to flash the SOS Morse code. It works fine, but I am curious why it needs ...
1
vote
2answers
2k views
Pi 2 CPU Documentation
I'm interested in processor architecture, and assembly programming, but I can't seem to find any documentation, or even the datasheet on the CPU of the Pi 2 (BCM2836). The document I'm looking for ...
3
votes
1answer
801 views
Baking Pi Lesson 02 does not work on B+
I would like to comprehend lesson 2 of Baking Pi, but I am not able to get the LED blinking.
I am using Windows and have installed Cygwin and the ARM tool chain. As explained in the requirements, I ...
3
votes
1answer
739 views
ASM - how do I write graphics straight to the screen
I have some old RISC OS assembly programmes I wrote a few years back and I want to port them to Raspberry Pi.
I ran Mode 28 and wrote output directly to the screen using the memory address where v-...
2
votes
0answers
2k views
Assembly - set gpio as input
I have 2 leds and one button.
both green and yellow led off when booting from card.
When the button is pressed, i want to turn green led off and yellow led on.
However, I have to write assembly. I ...
1
vote
0answers
134 views
Memory addresses
I am writing an assembly program, assembling it and replacing the kernel.img file on a SD card with raspbian installed on it.
Will the memory address of the first instruction be zero? Either because ...
1
vote
2answers
3k views
Assembly code on Raspberry Pi
What's the file extension for assembly code? Can it even be written by a text editor?
My plan was to use nano to write the program (for syntax highlighting), so would that work? If not, what do I ...
2
votes
1answer
698 views
Run program on Baking Pi ARM ASM OS
I am following the Baking Pi Raspberry Pi ASM OS tutorial here, and I thought that it would be cool if I could create a compiler/runner for like, BASIC or a language I create. I don't have the skill ...
0
votes
2answers
1k views
Kernel module assembly output
I compiled the kernel modules written in C directly on my Raspberry Pi using this Makefile:
obj-m := HelloWorld.o
all:
$(MAKE) -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules
clean:
...
20
votes
5answers
23k views
Write an OS for Raspberry Pi in C
I already found the Baking Pi tutorials, but they only use assembly language. I followed the first lessons, but I am already wondering how to use C instead. I mean, there is a reason they invented ...
1
vote
1answer
438 views
Assembling Thumb on Rasparian
Has anyone been successful in assembling, compiling and running thumb or thumb-2 on Rasparian. Here is an example of my assembly code:
.text
.global main
.code 16
main:
MOV r3,#1
finish:
...
