Embedded Programming

CAN bus confusion - bus disconnected bad behavior...

OK, I'm sure I'm confused about something basic here... I have two CAN bus devices which work fine when connected to a...

13 comments posted 12yrs

posted by drn

13 comments posted 12yrs posted by drn

Where is "uint16x8_t" defined?

Hi, I program on Ubuntu 12.04, 32bit for some ARM projects. On Ubuntu, a Linaro toolchain works well for some time. Rec...

11 comments posted 12yrs

posted by rxjwg98

11 comments posted 12yrs posted by rxjwg98

DDR2 Skew Constraints

I am designing around the Atme AT91SAM9G25 with a single 16bit DDR2 memory. This processor has a DDR2 bus speed of 133M...

5 comments posted 12yrs

posted by steve.jones

5 comments posted 12yrs posted by steve.jones

Unfamiliar code construct

Copiedt following straight out of a Freescale application note. The second doesn't look familuar. Is this a standard C...

6 comments posted 12yrs

posted by bv

6 comments posted 12yrs posted by bv

ARM, Single-Chip PC, or other architectures for audio stuff?

Gentlemen, An upcoming audio project will be fairly math-intense. Two 1024-point complex FFTs at least at 5msec rep rat...

127 comments posted 12yrs

posted by invalid

127 comments posted 12yrs posted by invalid

Question about inline asm for ARM

Hi, I want to use ARM A8 performance counter. I find a post on line, but I do not understand its grammar. ARM inforcent...

3 comments posted 12yrs

posted by rxjwg98

3 comments posted 12yrs posted by rxjwg98

HP 64000 development system

I have an old HP64000 development system. Worked last time it was used (about 10 yrs ago). Before I load it into the du...

3 comments posted 12yrs

posted by mark.griswold

3 comments posted 12yrs posted by mark.griswold

A $3.2 billion* thermostat....

http://www.eetimes.com/document.asp?doc_id=1320649& Something is not right. Obviously a thermostat cannot cost a tiny f...

4 comments posted 12yrs

posted by dp

4 comments posted 12yrs posted by dp

What is "4 supported data types" below?

Hi, I am learning to use NE10 ARM library. On its FIR function, see below pleas e, there are 2 places made me puzzled....

1 comments posted 12yrs

posted by rxjwg98

1 comments posted 12yrs posted by rxjwg98

Several problems in porting/runnig Qt/Embedded program on/to FriendlyARM Board

Dear All Embedded developers Hello Here's the deal. I know Qtopia Core is old, I know Qt Embedded is old, several devel...

0 comments posted 12yrs

posted by amrollahi.saeed

0 comments posted 12yrs posted by amrollahi.saeed

Where is ne10_qMaskTable32 of NE10 library defined?

Hi, After I get a little familiar with NE10 library, I want to write my NEON asm code now. That is, I copy the original...

4 comments posted 12yrs

posted by rxjwg98

4 comments posted 12yrs posted by rxjwg98

RS485: when should I consider it a "transmission line"

I know multi-drop two-wires RS485 bus must be considered a "transmission line" (so terminations are important) when the...

6 comments posted 12yrs

posted by pozzugno

6 comments posted 12yrs posted by pozzugno

asflags while cross compiling a kernel module (wind river linux v4)

Hello I am trying to pass certain parameters to the wind river gnu assembler and I want this to apply only while compil...

2 comments posted 12yrs

posted by aijazbaig1.new

2 comments posted 12yrs posted by aijazbaig1.new

What is arm-linux-gnueabihf-gcc flag -lm for?

Hi, I build NE10 library for ARM Using static library $arm-linux-gnueabihf-gcc ?O2 -o sample sample.c -I$NE10_INC_PATH...

4 comments posted 12yrs

posted by rxjwg98

4 comments posted 12yrs posted by rxjwg98

What does 'm' mean in this cmake file?

Hi, I am learning cmake for cross compiling ARM projects. The following is from an on-line cmake tutorial. I do not und...

1 comments posted 12yrs

posted by rxjwg98

1 comments posted 12yrs posted by rxjwg98