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Questions tagged [arm9]

Questions on ARM9 processor family. ARM9 is 32-bit RISC CPU family based on ARMv5 architecture. The ARM9 processor family includes ARM926EJ-S™, ARM946E-S™ and ARM968E-S™ processors.

ARM9 is 32-bit RISC CPU family based on ARMv5 architecture. The ARM9 processor family includes ARM926EJ-S™, ARM946E-S™ and ARM968E-S™ processors.

With this design generation, ARM moved from a von Neumann architecture (Princeton architecture) to a Harvard architecture with separate instruction and data buses (and caches), significantly increasing its potential speed. Most silicon chips integrating these cores will package them as modified Harvard architecture chips, combining the two address buses on the other side of separated CPU caches and tightly coupled memories.

Source: http://en.wikipedia.org/wiki/ARM9

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Run Console to TTY dynamically on LINUX

We have embebed linux on ARM9 board which is connected to another board by serial line TTY1, no other way to communicate with the ARM9 board (no ethernet no usb), in our normal state application ARM9 board exchange datas with the other board on…
Safirxps
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Reading DEVMODE structure from Registry

I am working on a project where I need to program for print operations from device. It has WIN CE 6.0. I am using Visual Studio 2005 (MFC). The printer can be any PCL-compatible printer. Currently, to get printer DC, I am using CreateDC().…
Aftab
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Slow threading performance on Linux on ARM9

When I write a simple application, running for 10 minutes, that starts 10 threads once (pthreads), each sleeping for 1 ms in a loop (not doing anything else) the CPU is used ca. 44% (top reports that). It is a ARM9 CPU with 450 MHz, Linux 2.6.37 is…
azraiyl
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Tensorflow lite build for ARM9 32-bit architecture

i am trying to build tensor flow wheel file using Bazel for 32-bit ARM9 architecture. but Bazel will not support for 32-bit architecture .can someone help me in building wheel file(.whl) for 32-bit architecture. i tried to build custom tool chain…
sai manohar
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How many Instruction cycles will this instructions take?

If i'm not wrong ldrb r3, [r1], #1 will take 3 instruction cycles, and similarly add r4, r1, #2 will take 1 instruction cycles not discussing the interlock delays here, but i'm confused how many cycles will cmp r4, r3 takes? Note that: It's ARM…
Syed Bilal
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Tensorflow lite build fails for ARM926 processor

All, I am trying to build the tensorflow lite for my target processor ARM926EJ-S processor (ARM5te architecture). I've replicated the build script and build settings for my target processor from Rasp PI build script and settings. Here are my build…
arm
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Printing contents of cache register c7 in ARM926EJ

I'm trying to see the contents of cache register and the status of dirty bit in c7 before and after cleaning D cache. This link: https://developer.arm.com/docs/ddi0198/latest/programmers-model/register-descriptions/cache-operations-register-c7 says…
Santosh Kr
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is any concept of hard float and soft float exist in case of armv4t processor family?

which toolchain i have to use for building a source code for arm 9 processor family (armv4t ) . i have used arm-linux-gnueabihf-gcc -marm -march=armv4t for building of my source code , but this does not work . And can anyone tell me about origin of…
user5031843
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map error while coding for ARM9 using ADS 1.2 compiler and ARM11 RVCT2.2

I'm porting my code which written in cpp to support ARM9 using ADS 1.2 compiler,but after porting the below code gives error while compiling for ARM11 using RVCT2.2 compiler, this is the sample code list >…
Jay
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[AT91SAM][DEBUGGER]How can I configure the gdbserver with Eclipse?

I have installed the arm-linux-gnueabi on a VM to cross compile a AT91SAM9G20 software. The cross compiler works fine. My question is: How to configure Eclipse to use gdbserver? I have configured a new ssh connection (working, I have access on the…
Foxrider83
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SPI Driver for uC s3c2451 to configure HSSPI->SPI Channel 0?

I have started a threat to read/write SPI flash memory for s3c2440 Microcontroller. All register setting are done properly and flash memory read/write functionality working perfectly. S3c2440(ARM9) spi_read_write Flash Memory Now, I want to do the…
RFK
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S3c2440(ARM9) spi_read_write Flash Memory

I am working on SPI communication.Trying to communicate SST25VF032B(32 MB microchip SPI Flash). When I am reading the Manufacturer Id it shows MF_ID =>4A25BF but originally it is MF_ID =>BF254A. I am getting it simply reverse, means first bite in…
RFK
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embedded linux userland app suddenly started crashing

The gist of the problem is : What are the possibilities of a user-land app getting corrupted while it is running ? Other than hardware failures. Hardware rig : ARM9 (at91sam9xe) NAND Flash for :Linux kernel + FS + userland app. We had an app running…
Muhammad Ali
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Bare Metal Arm (AM1808) - Read from Kick Registers

I am trying to do some pin multiplexing on my bare metal AM1808, but I can't seem to write the kick register? Or, more specifically, I seem to be unable to read back the values I tried to write. Here is my code: #define SYSCFG_BASE…
Andreas Grapentin
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Can I use SigmaTel STMP 3650 kit firmware code on other devices?

I know little about MCUs and embedded systems. A year ago we made contract with a company to design a special purpuse MP4 device based on the SigmaTel STMP 3650 kit. Now we have all the source code for the firmware (code, resource around 1G). My…
avar
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